[PATCH] xtensa: Architecture support for Tensilica Xtensa Part 7

The attached patches provides part 7 of an architecture implementation for the
Tensilica Xtensa CPU series.

Signed-off-by: Chris Zankel <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

include/asm-xtensa/xtensa/cacheasm.h

···
+#ifndef XTENSA_CACHEASM_H
+#define XTENSA_CACHEASM_H
+
+/*
+ * THIS FILE IS GENERATED -- DO NOT MODIFY BY HAND
+ *
+ * include/asm-xtensa/xtensa/cacheasm.h -- assembler-specific cache
+ * related definitions that depend on CORE configuration.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2002 Tensilica Inc.
+ */
+
+
+#include <xtensa/coreasm.h>
+
+
+/*
+ *  This header file defines assembler macros of the form:
+ *	<x>cache_<func>
+ *  where <x> is 'i' or 'd' for instruction and data caches,
+ *  and <func> indicates the function of the macro.
+ *
+ *  The following functions <func> are defined,
+ *  and apply only to the specified cache (I or D):
+ *
+ *  reset
+ *	Resets the cache.
+ *
+ *  sync
+ *	Makes sure any previous cache instructions have been completed;
+ *	ie. makes sure any previous cache control operations
+ *	have had full effect and been synchronized to memory.
+ *	Eg. any invalidate completed [so as not to generate a hit],
+ *	any writebacks or other pipelined writes written to memory, etc.
+ *
+ *  invalidate_line		(single cache line)
+ *  invalidate_region		(specified memory range)
+ *  invalidate_all		(entire cache)
+ *	Invalidates all cache entries that cache
+ *	data from the specified memory range.
+ *	NOTE: locked entries are not invalidated.
+ *
+ *  writeback_line		(single cache line)
+ *  writeback_region		(specified memory range)
+ *  writeback_all		(entire cache)
+ *	Writes back to memory all dirty cache entries
+ *	that cache data from the specified memory range,
+ *	and marks these entries as clean.
+ *	NOTE: on some future implementations, this might
+ *		also invalidate.
+ *	NOTE: locked entries are written back, but never invalidated.
+ *	NOTE: instruction caches never implement writeback.
+ *
+ *  writeback_inv_line		(single cache line)
+ *  writeback_inv_region	(specified memory range)
+ *  writeback_inv_all		(entire cache)
+ *	Writes back to memory all dirty cache entries
+ *	that cache data from the specified memory range,
+ *	and invalidates these entries (including all clean
+ *	cache entries that cache data from that range).
+ *	NOTE: locked entries are written back but not invalidated.
+ *	NOTE: instruction caches never implement writeback.
+ *
+ *  lock_line			(single cache line)
+ *  lock_region			(specified memory range)
+ *	Prefetch and lock the specified memory range into cache.
+ *	NOTE:  if any part of the specified memory range cannot
+ *	be locked, a ??? exception occurs.  These macros don't
+ *	do anything special (yet anyway) to handle this situation.
+ *
+ *  unlock_line			(single cache line)
+ *  unlock_region		(specified memory range)
+ *  unlock_all			(entire cache)
+ *	Unlock cache entries that cache the specified memory range.
+ *	Entries not already locked are unaffected.
+ */
+
+
+
+/***************************   GENERIC -- ALL CACHES   ***************************/
+
+
+/*
+ *  The following macros assume the following cache size/parameter limits
+ *  in the current Xtensa core implementation:
+ *	cache size:	1024 bytes minimum
+ *	line size:	16 - 64 bytes
+ *	way count:	1 - 4
+ *
+ *  Minimum entries per way (ie. per associativity) = 1024 / 64 / 4 = 4
+ *  Hence the assumption that each loop can execute four cache instructions.
+ *
+ *  Correspondingly, the offset range of instructions is assumed able to cover
+ *  four lines, ie. offsets {0,1,2,3} * line_size are assumed valid for
+ *  both hit and indexed cache instructions.  Ie. these offsets are all
+ *  valid:  0, 16, 32, 48, 64, 96, 128, 192 (for line sizes 16, 32, 64).
+ *  This is true of all original cache instructions
+ *  (dhi, ihi, dhwb, dhwbi, dii, iii) which have offsets
+ *  of 0 to 1020 in multiples of 4 (ie. 8 bits shifted by 2).
+ *  This is also true of subsequent cache instructions
+ *  (dhu, ihu, diu, iiu, diwb, diwbi, dpfl, ipfl) which have offsets
+ *  of 0 to 240 in multiples of 16 (ie. 4 bits shifted by 4).
+ *
+ *  (Maximum cache size, currently 32k, doesn't affect the following macros.
+ *  Cache ways > MMU min page size cause aliasing but that's another matter.)
+ */
+
+
+
+/*
+ *  Macro to apply an 'indexed' cache instruction to the entire cache.
+ *
+ *  Parameters:
+ *	cainst		instruction/ that takes an address register parameter
+ *			and an offset parameter (in range 0 .. 3*linesize).
+ *	size		size of cache in bytes
+ *	linesize	size of cache line in bytes
+ *	assoc_or1	number of associativities (ways/sets) in cache
+ *			if all sets affected by cainst,
+ *			or 1 if only one set (or not all sets) of the cache
+ *			is affected by cainst (eg. DIWB or DIWBI [not yet ISA defined]).
+ *	aa, ab		unique address registers (temporaries)
+ */
+
+	.macro	cache_index_all		cainst, size, linesize, assoc_or1, aa, ab
+
+	//  Sanity-check on cache parameters:
+	.ifne	(\size % (\linesize * \assoc_or1 * 4))
+	.err	//  cache configuration outside expected/supported range!
+	.endif
+
+	//  \size byte cache, \linesize byte lines, \assoc_or1 way(s) affected by each \cainst.
+	movi	\aa, (\size / (\linesize * \assoc_or1 * 4))
+	// Possible improvement: need only loop if \aa > 1 ;
+	// however that particular condition is highly unlikely.
+	movi	\ab, 0		// to iterate over cache
+	floop		\aa, cachex\@
+	\cainst		\ab, 0*\linesize
+	\cainst		\ab, 1*\linesize
+	\cainst		\ab, 2*\linesize
+	\cainst		\ab, 3*\linesize
+	addi		\ab, \ab, 4*\linesize	// move to next line
+	floopend	\aa, cachex\@
+
+	.endm
+
+
+/*
+ *  Macro to apply a 'hit' cache instruction to a memory region,
+ *  ie. to any cache entries that cache a specified portion (region) of memory.
+ *  Takes care of the unaligned cases, ie. may apply to one
+ *  more cache line than $asize / lineSize if $aaddr is not aligned.
+ *
+ *
+ *  Parameters are:
+ *	cainst	instruction/macro that takes an address register parameter
+ *		and an offset parameter (currently always zero)
+ *		and generates a cache instruction (eg. "dhi", "dhwb", "ihi", etc.)
+ *	linesize_log2	log2(size of cache line in bytes)
+ *	addr	register containing start address of region (clobbered)
+ *	asize	register containing size of the region in bytes (clobbered)
+ *	askew	unique register used as temporary
+ *
+ * !?!?! 2DO: optimization: iterate max(cache_size and \asize) / linesize
+ */
+
+	.macro	cache_hit_region	cainst, linesize_log2, addr, asize, askew
+
+	//  Make \asize the number of iterations:
+	extui	\askew, \addr, 0, \linesize_log2	// get unalignment amount of \addr
+	add	\asize, \asize, \askew			// ... and add it to \asize
+	addi	\asize, \asize, (1 << \linesize_log2) - 1	// round up!
+	srli	\asize, \asize, \linesize_log2
+
+	//  Iterate over region:
+	floopnez	\asize, cacheh\@
+	\cainst		\addr, 0
+	addi		\addr, \addr, (1 << \linesize_log2)	// move to next line
+	floopend	\asize, cacheh\@
+
+	.endm
+
+
+
+
+
+/***************************   INSTRUCTION CACHE   ***************************/
+
+
+/*
+ *  Reset/initialize the instruction cache by simply invalidating it:
+ *  (need to unlock first also, if cache locking implemented):
+ *
+ *  Parameters:
+ *	aa, ab		unique address registers (temporaries)
+ */
+	.macro	icache_reset	aa, ab
+	icache_unlock_all	\aa, \ab
+	icache_invalidate_all	\aa, \ab
+	.endm
+
+
+/*
+ * Synchronize after an instruction cache operation,
+ * to be sure everything is in sync with memory as to be
+ * expected following any previous instruction cache control operations.
+ *
+ * Parameters are:
+ *	ar	an address register (temporary) (currently unused, but may be used in future)
+ */
+	.macro	icache_sync	ar
+#if XCHAL_ICACHE_SIZE > 0
+	isync
+#endif
+	.endm
+
+
+
+/*
+ *  Invalidate a single line of the instruction cache.
+ *  Parameters are:
+ *	ar	address register that contains (virtual) address to invalidate
+ *		(may get clobbered in a future implementation, but not currently)
+ *	offset	(optional) offset to add to \ar to compute effective address to invalidate
+ *		(note: some number of lsbits are ignored)
+ */
+	.macro	icache_invalidate_line	ar, offset
+#if XCHAL_ICACHE_SIZE > 0
+	ihi	\ar, \offset		// invalidate icache line
+	/*
+	 *  NOTE:  in some version of the silicon [!!!SHOULD HAVE BEEN DOCUMENTED!!!]
+	 *  'ihi' doesn't work, so it had been replaced with 'iii'
+	 *  (which would just invalidate more than it should,
+	 *  which should be okay other than the performance hit
+	 *  because cache locking did not exist in that version,
+	 *  unless user somehow relies on something being cached).
+	 *  [WHAT VERSION IS IT!!?!?
+	 *  IS THERE ANY WAY TO TEST FOR THAT HERE, TO OUTPUT 'III' ONLY IF NEEDED!?!?].
+	 *
+	 *	iii	\ar, \offset
+	 */
+	icache_sync	\ar
+#endif
+	.endm
+
+
+
+
+/*
+ *  Invalidate instruction  cache entries that cache a specified portion of memory.
+ *  Parameters are:
+ *	astart	start address (register gets clobbered)
+ *	asize	size of the region in bytes (register gets clobbered)
+ *	ac	unique register used as temporary
+ */
+	.macro	icache_invalidate_region	astart, asize, ac
+#if XCHAL_ICACHE_SIZE > 0
+	//  Instruction cache region invalidation:
+	cache_hit_region	ihi, XCHAL_ICACHE_LINEWIDTH, \astart, \asize, \ac
+	icache_sync	\ac
+	//  End of instruction cache region invalidation
+#endif
+	.endm
+
+
+
+/*
+ *  Invalidate entire instruction cache.
+ *
+ *  Parameters:
+ *	aa, ab		unique address registers (temporaries)
+ */
+	.macro	icache_invalidate_all	aa, ab
+#if XCHAL_ICACHE_SIZE > 0
+	//  Instruction cache invalidation:
+	cache_index_all		iii, XCHAL_ICACHE_SIZE, XCHAL_ICACHE_LINESIZE, XCHAL_ICACHE_WAYS, \aa, \ab
+	icache_sync	\aa
+	//  End of instruction cache invalidation
+#endif
+	.endm
+
+
+
+/*
+ *  Lock (prefetch & lock) a single line of the instruction cache.
+ *
+ *  Parameters are:
+ *	ar	address register that contains (virtual) address to lock
+ *		(may get clobbered in a future implementation, but not currently)
+ *	offset	offset to add to \ar to compute effective address to lock
+ *		(note: some number of lsbits are ignored)
+ */
+	.macro	icache_lock_line	ar, offset
+#if XCHAL_ICACHE_SIZE > 0 && XCHAL_ICACHE_LINE_LOCKABLE
+	ipfl	\ar, \offset	/* prefetch and lock icache line */
+	icache_sync	\ar
+#endif
+	.endm
+
+
+
+/*
+ *  Lock (prefetch & lock) a specified portion of memory into the instruction cache.
+ *  Parameters are:
+ *	astart	start address (register gets clobbered)
+ *	asize	size of the region in bytes (register gets clobbered)
+ *	ac	unique register used as temporary
+ */
+	.macro	icache_lock_region	astart, asize, ac
+#if XCHAL_ICACHE_SIZE > 0 && XCHAL_ICACHE_LINE_LOCKABLE
+	//  Instruction cache region lock:
+	cache_hit_region	ipfl, XCHAL_ICACHE_LINEWIDTH, \astart, \asize, \ac
+	icache_sync	\ac
+	//  End of instruction cache region lock
+#endif
+	.endm
+
+
+
+/*
+ *  Unlock a single line of the instruction cache.
+ *
+ *  Parameters are:
+ *	ar	address register that contains (virtual) address to unlock
+ *		(may get clobbered in a future implementation, but not currently)
+ *	offset	offset to add to \ar to compute effective address to unlock
+ *		(note: some number of lsbits are ignored)
+ */
+	.macro	icache_unlock_line	ar, offset
+#if XCHAL_ICACHE_SIZE > 0 && XCHAL_ICACHE_LINE_LOCKABLE
+	ihu	\ar, \offset	/* unlock icache line */
+	icache_sync	\ar
+#endif
+	.endm
+
+
+
+/*
+ *  Unlock a specified portion of memory from the instruction cache.
+ *  Parameters are:
+ *	astart	start address (register gets clobbered)
+ *	asize	size of the region in bytes (register gets clobbered)
+ *	ac	unique register used as temporary
+ */
+	.macro	icache_unlock_region	astart, asize, ac
+#if XCHAL_ICACHE_SIZE > 0 && XCHAL_ICACHE_LINE_LOCKABLE
+	//  Instruction cache region unlock:
+	cache_hit_region	ihu, XCHAL_ICACHE_LINEWIDTH, \astart, \asize, \ac
+	icache_sync	\ac
+	//  End of instruction cache region unlock
+#endif
+	.endm
+
+
+
+/*
+ *  Unlock entire instruction cache.
+ *
+ *  Parameters:
+ *	aa, ab		unique address registers (temporaries)
+ */
+	.macro	icache_unlock_all	aa, ab
+#if XCHAL_ICACHE_SIZE > 0 && XCHAL_ICACHE_LINE_LOCKABLE
+	//  Instruction cache unlock:
+	cache_index_all		iiu, XCHAL_ICACHE_SIZE, XCHAL_ICACHE_LINESIZE, 1, \aa, \ab
+	icache_sync	\aa
+	//  End of instruction cache unlock
+#endif
+	.endm
+
+
+
+
+
+/***************************   DATA CACHE   ***************************/
+
+
+
+/*
+ *  Reset/initialize the data cache by simply invalidating it
+ *  (need to unlock first also, if cache locking implemented):
+ *
+ *  Parameters:
+ *	aa, ab		unique address registers (temporaries)
+ */
+	.macro	dcache_reset	aa, ab
+	dcache_unlock_all	\aa, \ab
+	dcache_invalidate_all	\aa, \ab
+	.endm
+
+
+
+
+/*
+ * Synchronize after a data cache operation,
+ * to be sure everything is in sync with memory as to be
+ * expected following any previous data cache control operations.
+ *
+ * Parameters are:
+ *	ar	an address register (temporary) (currently unused, but may be used in future)
+ */
+	.macro	dcache_sync	ar
+#if XCHAL_DCACHE_SIZE > 0
+	//  This previous sequence errs on the conservative side (too much so); a DSYNC should be sufficient:
+	//memw		// synchronize data cache changes relative to subsequent memory accesses
+	//isync		// be conservative and ISYNC as well (just to be sure)
+
+	dsync
+#endif
+	.endm
+
+
+
+/*
+ * Synchronize after a data store operation,
+ * to be sure the stored data is completely off the processor
+ * (and assuming there is no buffering outside the processor,
+ *  that the data is in memory).  This may be required to
+ * ensure that the processor's write buffers are emptied.
+ * A MEMW followed by a read guarantees this, by definition.
+ * We also try to make sure the read itself completes.
+ *
+ * Parameters are:
+ *	ar	an address register (temporary)
+ */
+	.macro	write_sync	ar
+	memw			// ensure previous memory accesses are complete prior to subsequent memory accesses
+	l32i	\ar, sp, 0	// completing this read ensures any previous write has completed, because of MEMW
+	//slot
+	add	\ar, \ar, \ar	// use the result of the read to help ensure the read completes (in future architectures)
+	.endm
+
+
+/*
+ *  Invalidate a single line of the data cache.
+ *  Parameters are:
+ *	ar	address register that contains (virtual) address to invalidate
+ *		(may get clobbered in a future implementation, but not currently)
+ *	offset	(optional) offset to add to \ar to compute effective address to invalidate
+ *		(note: some number of lsbits are ignored)
+ */
+	.macro	dcache_invalidate_line	ar, offset
+#if XCHAL_DCACHE_SIZE > 0
+	dhi	\ar, \offset
+	dcache_sync	\ar
+#endif
+	.endm
+
+
+
+
+
+/*
+ *  Invalidate data cache entries that cache a specified portion of memory.
+ *  Parameters are:
+ *	astart	start address (register gets clobbered)
+ *	asize	size of the region in bytes (register gets clobbered)
+ *	ac	unique register used as temporary
+ */
+	.macro	dcache_invalidate_region	astart, asize, ac
+#if XCHAL_DCACHE_SIZE > 0
+	//  Data cache region invalidation:
+	cache_hit_region	dhi, XCHAL_DCACHE_LINEWIDTH, \astart, \asize, \ac
+	dcache_sync	\ac
+	//  End of data cache region invalidation
+#endif
+	.endm
+
+
+
+#if 0
+/*
+ *  This is a work-around for a bug in SiChip1 (???).
+ *  There should be a proper mechanism for not outputting
+ *  these instructions when not needed.
+ *  To enable work-around, uncomment this and replace 'dii'
+ *  with 'dii_s1' everywhere, eg. in dcache_invalidate_all
+ *  macro below.
+ */
+	.macro	dii_s1	ar, offset
+	dii	\ar, \offset
+	or	\ar, \ar, \ar
+	or	\ar, \ar, \ar
+	or	\ar, \ar, \ar
+	or	\ar, \ar, \ar
+	.endm
+#endif
+
+
+/*
+ *  Invalidate entire data cache.
+ *
+ *  Parameters:
+ *	aa, ab		unique address registers (temporaries)
+ */
+	.macro	dcache_invalidate_all	aa, ab
+#if XCHAL_DCACHE_SIZE > 0
+	//  Data cache invalidation:
+	cache_index_all		dii, XCHAL_DCACHE_SIZE, XCHAL_DCACHE_LINESIZE, XCHAL_DCACHE_WAYS, \aa, \ab
+	dcache_sync	\aa
+	//  End of data cache invalidation
+#endif
+	.endm
+
+
+
+/*
+ *  Writeback a single line of the data cache.
+ *  Parameters are:
+ *	ar	address register that contains (virtual) address to writeback
+ *		(may get clobbered in a future implementation, but not currently)
+ *	offset	offset to add to \ar to compute effective address to writeback
+ *		(note: some number of lsbits are ignored)
+ */
+	.macro	dcache_writeback_line	ar, offset
+#if XCHAL_DCACHE_SIZE > 0 && XCHAL_DCACHE_IS_WRITEBACK
+	dhwb	\ar, \offset
+	dcache_sync	\ar
+#endif
+	.endm
+
+
+
+/*
+ *  Writeback dirty data cache entries that cache a specified portion of memory.
+ *  Parameters are:
+ *	astart	start address (register gets clobbered)
+ *	asize	size of the region in bytes (register gets clobbered)
+ *	ac	unique register used as temporary
+ */
+	.macro	dcache_writeback_region		astart, asize, ac
+#if XCHAL_DCACHE_SIZE > 0 && XCHAL_DCACHE_IS_WRITEBACK
+	//  Data cache region writeback:
+	cache_hit_region	dhwb, XCHAL_DCACHE_LINEWIDTH, \astart, \asize, \ac
+	dcache_sync	\ac
+	//  End of data cache region writeback
+#endif
+	.endm
+
+
+
+/*
+ *  Writeback entire data cache.
+ *  Parameters:
+ *	aa, ab		unique address registers (temporaries)
+ */
+	.macro	dcache_writeback_all	aa, ab
+#if XCHAL_DCACHE_SIZE > 0 && XCHAL_DCACHE_IS_WRITEBACK
+	//  Data cache writeback:
+	cache_index_all		diwb, XCHAL_DCACHE_SIZE, XCHAL_DCACHE_LINESIZE, 1, \aa, \ab
+	dcache_sync	\aa
+	//  End of data cache writeback
+#endif
+	.endm
+
+
+
+/*
+ *  Writeback and invalidate a single line of the data cache.
+ *  Parameters are:
+ *	ar	address register that contains (virtual) address to writeback and invalidate
+ *		(may get clobbered in a future implementation, but not currently)
+ *	offset	offset to add to \ar to compute effective address to writeback and invalidate
+ *		(note: some number of lsbits are ignored)
+ */
+	.macro	dcache_writeback_inv_line	ar, offset
+#if XCHAL_DCACHE_SIZE > 0
+	dhwbi	\ar, \offset	/* writeback and invalidate dcache line */
+	dcache_sync	\ar
+#endif
+	.endm
+
+
+
+/*
+ *  Writeback and invalidate data cache entries that cache a specified portion of memory.
+ *  Parameters are:
+ *	astart	start address (register gets clobbered)
+ *	asize	size of the region in bytes (register gets clobbered)
+ *	ac	unique register used as temporary
+ */
+	.macro	dcache_writeback_inv_region	astart, asize, ac
+#if XCHAL_DCACHE_SIZE > 0
+	//  Data cache region writeback and invalidate:
+	cache_hit_region	dhwbi, XCHAL_DCACHE_LINEWIDTH, \astart, \asize, \ac
+	dcache_sync	\ac
+	//  End of data cache region writeback and invalidate
+#endif
+	.endm
+
+
+
+/*
+ *  Writeback and invalidate entire data cache.
+ *  Parameters:
+ *	aa, ab		unique address registers (temporaries)
+ */
+	.macro	dcache_writeback_inv_all	aa, ab
+#if XCHAL_DCACHE_SIZE > 0
+	//  Data cache writeback and invalidate:
+#if XCHAL_DCACHE_IS_WRITEBACK
+	cache_index_all		diwbi, XCHAL_DCACHE_SIZE, XCHAL_DCACHE_LINESIZE, 1, \aa, \ab
+	dcache_sync	\aa
+#else /*writeback*/
+	//  Data cache does not support writeback, so just invalidate: */
+	dcache_invalidate_all	\aa, \ab
+#endif /*writeback*/
+	//  End of data cache writeback and invalidate
+#endif
+	.endm
+
+
+
+
+/*
+ *  Lock (prefetch & lock) a single line of the data cache.
+ *
+ *  Parameters are:
+ *	ar	address register that contains (virtual) address to lock
+ *		(may get clobbered in a future implementation, but not currently)
+ *	offset	offset to add to \ar to compute effective address to lock
+ *		(note: some number of lsbits are ignored)
+ */
+	.macro	dcache_lock_line	ar, offset
+#if XCHAL_DCACHE_SIZE > 0 && XCHAL_DCACHE_LINE_LOCKABLE
+	dpfl	\ar, \offset	/* prefetch and lock dcache line */
+	dcache_sync	\ar
+#endif
+	.endm
+
+
+
+/*
+ *  Lock (prefetch & lock) a specified portion of memory into the data cache.
+ *  Parameters are:
+ *	astart	start address (register gets clobbered)
+ *	asize	size of the region in bytes (register gets clobbered)
+ *	ac	unique register used as temporary
+ */
+	.macro	dcache_lock_region	astart, asize, ac
+#if XCHAL_DCACHE_SIZE > 0 && XCHAL_DCACHE_LINE_LOCKABLE
+	//  Data cache region lock:
+	cache_hit_region	dpfl, XCHAL_DCACHE_LINEWIDTH, \astart, \asize, \ac
+	dcache_sync	\ac
+	//  End of data cache region lock
+#endif
+	.endm
+
+
+
+/*
+ *  Unlock a single line of the data cache.
+ *
+ *  Parameters are:
+ *	ar	address register that contains (virtual) address to unlock
+ *		(may get clobbered in a future implementation, but not currently)
+ *	offset	offset to add to \ar to compute effective address to unlock
+ *		(note: some number of lsbits are ignored)
+ */
+	.macro	dcache_unlock_line	ar, offset
+#if XCHAL_DCACHE_SIZE > 0 && XCHAL_DCACHE_LINE_LOCKABLE
+	dhu	\ar, \offset	/* unlock dcache line */
+	dcache_sync	\ar
+#endif
+	.endm
+
+
+
+/*
+ *  Unlock a specified portion of memory from the data cache.
+ *  Parameters are:
+ *	astart	start address (register gets clobbered)
+ *	asize	size of the region in bytes (register gets clobbered)
+ *	ac	unique register used as temporary
+ */
+	.macro	dcache_unlock_region	astart, asize, ac
+#if XCHAL_DCACHE_SIZE > 0 && XCHAL_DCACHE_LINE_LOCKABLE
+	//  Data cache region unlock:
+	cache_hit_region	dhu, XCHAL_DCACHE_LINEWIDTH, \astart, \asize, \ac
+	dcache_sync	\ac
+	//  End of data cache region unlock
+#endif
+	.endm
+
+
+
+/*
+ *  Unlock entire data cache.
+ *
+ *  Parameters:
+ *	aa, ab		unique address registers (temporaries)
+ */
+	.macro	dcache_unlock_all	aa, ab
+#if XCHAL_DCACHE_SIZE > 0 && XCHAL_DCACHE_LINE_LOCKABLE
+	//  Data cache unlock:
+	cache_index_all		diu, XCHAL_DCACHE_SIZE, XCHAL_DCACHE_LINESIZE, 1, \aa, \ab
+	dcache_sync	\aa
+	//  End of data cache unlock
+#endif
+	.endm
+
+
+#endif /*XTENSA_CACHEASM_H*/
+

include/asm-xtensa/xtensa/cacheattrasm.h

···
+#ifndef XTENSA_CACHEATTRASM_H
+#define XTENSA_CACHEATTRASM_H
+
+/*
+ * THIS FILE IS GENERATED -- DO NOT MODIFY BY HAND
+ *
+ * include/asm-xtensa/xtensa/cacheattrasm.h -- assembler-specific
+ * CACHEATTR register related definitions that depend on CORE
+ * configuration.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2002 Tensilica Inc.
+ */
+
+
+#include <xtensa/coreasm.h>
+
+
+/*
+ *  This header file defines assembler macros of the form:
+ *	<x>cacheattr_<func>
+ *  where:
+ *	<x> is 'i', 'd' or absent for instruction, data
+ *		or both caches; and
+ *	<func> indicates the function of the macro.
+ *
+ *  The following functions are defined:
+ *
+ *  icacheattr_get
+ *	Reads I-cache CACHEATTR into a2 (clobbers a3-a5).
+ *
+ *  dcacheattr_get
+ *	Reads D-cache CACHEATTR into a2 (clobbers a3-a5).
+ *	(Note:  for configs with a real CACHEATTR register, the
+ *	 above two macros are identical.)
+ *
+ *  cacheattr_set
+ *	Writes both I-cache and D-cache CACHEATTRs from a2 (a3-a8 clobbered).
+ *	Works even when changing one's own code's attributes.
+ *
+ *  icacheattr_is_enabled  label
+ *	Branches to \label if I-cache appears to have been enabled
+ *	(eg. if CACHEATTR contains a cache-enabled attribute).
+ *	(clobbers a2-a5,SAR)
+ *
+ *  dcacheattr_is_enabled  label
+ *	Branches to \label if D-cache appears to have been enabled
+ *	(eg. if CACHEATTR contains a cache-enabled attribute).
+ *	(clobbers a2-a5,SAR)
+ *
+ *  cacheattr_is_enabled  label
+ *	Branches to \label if either I-cache or D-cache appears to have been enabled
+ *	(eg. if CACHEATTR contains a cache-enabled attribute).
+ *	(clobbers a2-a5,SAR)
+ *
+ *  The following macros are only defined under certain conditions:
+ *
+ *  icacheattr_set	(if XCHAL_HAVE_MIMIC_CACHEATTR || XCHAL_HAVE_XLT_CACHEATTR)
+ *	Writes I-cache CACHEATTR from a2 (a3-a8 clobbered).
+ *
+ *  dcacheattr_set	(if XCHAL_HAVE_MIMIC_CACHEATTR || XCHAL_HAVE_XLT_CACHEATTR)
+ *	Writes D-cache CACHEATTR from a2 (a3-a8 clobbered).
+ */
+
+
+
+/***************************   GENERIC -- ALL CACHES   ***************************/
+
+/*
+ *  _cacheattr_get
+ *
+ *  (Internal macro.)
+ *  Returns value of CACHEATTR register (or closest equivalent) in a2.
+ *
+ *  Entry:
+ *	(none)
+ *  Exit:
+ *	a2	value read from CACHEATTR
+ *	a3-a5	clobbered (temporaries)
+ */
+	.macro	_cacheattr_get	tlb
+#if XCHAL_HAVE_CACHEATTR
+	rsr	a2, CACHEATTR
+#elif XCHAL_HAVE_MIMIC_CACHEATTR || XCHAL_HAVE_XLT_CACHEATTR
+	//  We have a config that "mimics" CACHEATTR using a simplified
+	//  "MMU" composed of a single statically-mapped way.
+	//  DTLB and ITLB are independent, so there's no single
+	//  cache attribute that can describe both.  So for now
+	//  just return the DTLB state.
+	movi	a5, 0xE0000000
+	movi	a2, 0
+	movi	a3, 0
+1:	add	a3, a3, a5	// next segment
+	r&tlb&1	a4, a3		// get PPN+CA of segment at 0xE0000000, 0xC0000000, ..., 0
+	dsync	// interlock???
+	slli	a2, a2, 4
+	extui	a4, a4, 0, 4	// extract CA
+	or	a2, a2, a4
+	bnez	a3, 1b
+#else
+	//  This macro isn't applicable to arbitrary MMU configurations.
+	//  Just return zero.
+	movi	a2, 0
+#endif
+	.endm
+
+	.macro	icacheattr_get
+	_cacheattr_get	itlb
+	.endm
+
+	.macro	dcacheattr_get
+	_cacheattr_get	dtlb
+	.endm
+
+
+#define XCHAL_CACHEATTR_ALL_BYPASS	0x22222222	/* default (powerup/reset) value of CACHEATTR, all BYPASS
+							   mode (ie. disabled/bypassed caches) */
+
+#if XCHAL_HAVE_CACHEATTR || XCHAL_HAVE_MIMIC_CACHEATTR || XCHAL_HAVE_XLT_CACHEATTR
+
+#define XCHAL_FCA_ENAMASK	0x001A	/* bitmap of fetch attributes that require enabled icache */
+#define XCHAL_LCA_ENAMASK	0x0003	/* bitmap of load  attributes that require enabled dcache */
+#define XCHAL_SCA_ENAMASK	0x0003	/* bitmap of store attributes that require enabled dcache */
+#define XCHAL_LSCA_ENAMASK	(XCHAL_LCA_ENAMASK|XCHAL_SCA_ENAMASK)	/* l/s attrs requiring enabled dcache */
+#define XCHAL_ALLCA_ENAMASK	(XCHAL_FCA_ENAMASK|XCHAL_LSCA_ENAMASK)	/* all attrs requiring enabled caches */
+
+/*
+ *  _cacheattr_is_enabled
+ *
+ *  (Internal macro.)
+ *  Branches to \label if CACHEATTR in a2 indicates an enabled
+ *  cache, using mask in a3.
+ *
+ *  Parameters:
+ *	label	where to branch to if cache is enabled
+ *  Entry:
+ *	a2	contains CACHEATTR value used to determine whether
+ *		caches are enabled
+ *	a3	16-bit constant where each bit correspond to
+ *		one of the 16 possible CA values (in a CACHEATTR mask);
+ *		CA values that indicate the cache is enabled
+ *		have their corresponding bit set in this mask
+ *		(eg. use XCHAL_xCA_ENAMASK , above)
+ *  Exit:
+ *	a2,a4,a5	clobbered
+ *	SAR		clobbered
+ */
+	.macro	_cacheattr_is_enabled	label
+	movi	a4, 8		// loop 8 times
+.Lcaife\@:
+	extui	a5, a2, 0, 4	// get CA nibble
+	ssr	a5		// index into mask according to CA...
+	srl	a5, a3		// ...and get CA's mask bit in a5 bit 0
+	bbsi.l	a5, 0, \label	// if CA indicates cache enabled, jump to label
+	srli	a2, a2, 4	// next nibble
+	addi	a4, a4, -1
+	bnez	a4, .Lcaife\@	// loop for each nibble
+	.endm
+
+#else /* XCHAL_HAVE_CACHEATTR || XCHAL_HAVE_MIMIC_CACHEATTR || XCHAL_HAVE_XLT_CACHEATTR */
+	.macro	_cacheattr_is_enabled	label
+	j	\label		// macro not applicable, assume caches always enabled
+	.endm
+#endif /* XCHAL_HAVE_CACHEATTR || XCHAL_HAVE_MIMIC_CACHEATTR || XCHAL_HAVE_XLT_CACHEATTR */
+
+
+
+/*
+ *  icacheattr_is_enabled
+ *
+ *  Branches to \label if I-cache is enabled.
+ *
+ *  Parameters:
+ *	label	where to branch to if icache is enabled
+ *  Entry:
+ *	(none)
+ *  Exit:
+ *	a2-a5, SAR	clobbered (temporaries)
+ */
+	.macro	icacheattr_is_enabled	label
+#if XCHAL_HAVE_CACHEATTR || XCHAL_HAVE_MIMIC_CACHEATTR || XCHAL_HAVE_XLT_CACHEATTR
+	icacheattr_get
+	movi	a3, XCHAL_FCA_ENAMASK
+#endif
+	_cacheattr_is_enabled	\label
+	.endm
+
+/*
+ *  dcacheattr_is_enabled
+ *
+ *  Branches to \label if D-cache is enabled.
+ *
+ *  Parameters:
+ *	label	where to branch to if dcache is enabled
+ *  Entry:
+ *	(none)
+ *  Exit:
+ *	a2-a5, SAR	clobbered (temporaries)
+ */
+	.macro	dcacheattr_is_enabled	label
+#if XCHAL_HAVE_CACHEATTR || XCHAL_HAVE_MIMIC_CACHEATTR || XCHAL_HAVE_XLT_CACHEATTR
+	dcacheattr_get
+	movi	a3, XCHAL_LSCA_ENAMASK
+#endif
+	_cacheattr_is_enabled	\label
+	.endm
+
+/*
+ *  cacheattr_is_enabled
+ *
+ *  Branches to \label if either I-cache or D-cache is enabled.
+ *
+ *  Parameters:
+ *	label	where to branch to if a cache is enabled
+ *  Entry:
+ *	(none)
+ *  Exit:
+ *	a2-a5, SAR	clobbered (temporaries)
+ */
+	.macro	cacheattr_is_enabled	label
+#if XCHAL_HAVE_CACHEATTR
+	rsr	a2, CACHEATTR
+	movi	a3, XCHAL_ALLCA_ENAMASK
+#elif XCHAL_HAVE_MIMIC_CACHEATTR || XCHAL_HAVE_XLT_CACHEATTR
+	icacheattr_get
+	movi	a3, XCHAL_FCA_ENAMASK
+	_cacheattr_is_enabled	\label
+	dcacheattr_get
+	movi	a3, XCHAL_LSCA_ENAMASK
+#endif
+	_cacheattr_is_enabled	\label
+	.endm
+
+
+
+/*
+ *  The ISA does not have a defined way to change the
+ *  instruction cache attributes of the running code,
+ *  ie. of the memory area that encloses the current PC.
+ *  However, each micro-architecture (or class of
+ *  configurations within a micro-architecture)
+ *  provides a way to deal with this issue.
+ *
+ *  Here are a few macros used to implement the relevant
+ *  approach taken.
+ */
+
+#if XCHAL_HAVE_MIMIC_CACHEATTR || XCHAL_HAVE_XLT_CACHEATTR
+	//  We have a config that "mimics" CACHEATTR using a simplified
+	//  "MMU" composed of a single statically-mapped way.
+
+/*
+ *  icacheattr_set
+ *
+ *  Entry:
+ *	a2		cacheattr value to set
+ *  Exit:
+ *	a2		unchanged
+ *	a3-a8		clobbered (temporaries)
+ */
+	.macro	icacheattr_set
+
+	movi	a5, 0xE0000000	// mask of upper 3 bits
+	movi	a6, 3f		// PC where ITLB is set
+	movi	a3, 0		// start at region 0 (0 .. 7)
+	and	a6, a6, a5	// upper 3 bits of local PC area
+	mov	a7, a2		// copy a2 so it doesn't get clobbered
+	j	3f
+
+# if XCHAL_HAVE_XLT_CACHEATTR
+	//  Can do translations, use generic method:
+1:	sub	a6, a3, a5	// address of some other segment
+	ritlb1	a8, a6		// save its PPN+CA
+	dsync	// interlock??
+	witlb	a4, a6		// make it translate to this code area
+	movi	a6, 5f		// where to jump into it
+	isync
+	sub	a6, a6, a5	// adjust jump address within that other segment
+	jx	a6
+
+	//  Note that in the following code snippet, which runs at a different virtual
+	//  address than it is assembled for, we avoid using literals (eg. via movi/l32r)
+	//  just in case literals end up in a different 512 MB segment, and we avoid
+	//  instructions that rely on the current PC being what is expected.
+	//
+	.align	4
+	_j	6f		// this is at label '5' minus 4 bytes
+	.align	4
+5:	witlb	a4, a3		// we're in other segment, now can write previous segment's CA
+	isync
+	add	a6, a6, a5	// back to previous segment
+	addi	a6, a6, -4	// next jump label
+	jx	a6
+
+6:	sub	a6, a3, a5	// address of some other segment
+	witlb	a8, a6		// restore PPN+CA of other segment
+	mov	a6, a3		// restore a6
+	isync
+# else /* XCHAL_HAVE_XLT_CACHEATTR */
+	//  Use micro-architecture specific method.
+	//  The following 4-instruction sequence is aligned such that
+	//  it all fits within a single I-cache line.  Sixteen byte
+	//  alignment is sufficient for this (using XCHAL_ICACHE_LINESIZE
+	//  actually causes problems because that can be greater than
+	//  the alignment of the reset vector, where this macro is often
+	//  invoked, which would cause the linker to align the reset
+	//  vector code away from the reset vector!!).
+	.align	16 /*XCHAL_ICACHE_LINESIZE*/
+1:	_witlb	a4, a3		// write wired PTE (CA, no PPN) of 512MB segment to ITLB
+	_isync
+	nop
+	nop
+# endif /* XCHAL_HAVE_XLT_CACHEATTR */
+	beq	a3, a5, 4f	// done?
+
+	//  Note that in the WITLB loop, we don't do any load/stores
+	//  (may not be an issue here, but it is important in the DTLB case).
+2:	srli	a7, a7, 4	// next CA
+	sub	a3, a3, a5	// next segment (add 0x20000000)
+3:
+# if XCHAL_HAVE_XLT_CACHEATTR	/* if have translation, preserve it */
+	ritlb1	a8, a3		// get current PPN+CA of segment
+	dsync	// interlock???
+	extui	a4, a7, 0, 4	// extract CA to set
+	srli	a8, a8, 4	// clear CA but keep PPN ...
+	slli	a8, a8, 4	// ...
+	add	a4, a4, a8	// combine new CA with PPN to preserve
+# else
+	extui	a4, a7, 0, 4	// extract CA
+# endif
+	beq	a3, a6, 1b	// current PC's region? if so, do it in a safe way
+	witlb	a4, a3		// write wired PTE (CA [+PPN]) of 512MB segment to ITLB
+	bne	a3, a5, 2b
+	isync			// make sure all ifetch changes take effect
+4:
+	.endm	// icacheattr_set
+
+
+/*
+ *  dcacheattr_set
+ *
+ *  Entry:
+ *	a2		cacheattr value to set
+ *  Exit:
+ *	a2		unchanged
+ *	a3-a8		clobbered (temporaries)
+ */
+
+	.macro	dcacheattr_set
+
+	movi	a5, 0xE0000000	// mask of upper 3 bits
+	movi	a3, 0		// start at region 0 (0 .. 7)
+	mov	a7, a2		// copy a2 so it doesn't get clobbered
+	j	3f
+	//  Note that in the WDTLB loop, we don't do any load/stores
+	//  (including implicit l32r via movi) because it isn't safe.
+2:	srli	a7, a7, 4	// next CA
+	sub	a3, a3, a5	// next segment (add 0x20000000)
+3:
+# if XCHAL_HAVE_XLT_CACHEATTR	/* if have translation, preserve it */
+	rdtlb1	a8, a3		// get current PPN+CA of segment
+	dsync	// interlock???
+	extui	a4, a7, 0, 4	// extract CA to set
+	srli	a8, a8, 4	// clear CA but keep PPN ...
+	slli	a8, a8, 4	// ...
+	add	a4, a4, a8	// combine new CA with PPN to preserve
+# else
+	extui	a4, a7, 0, 4	// extract CA to set
+# endif
+	wdtlb	a4, a3		// write wired PTE (CA [+PPN]) of 512MB segment to DTLB
+	bne	a3, a5, 2b
+	dsync			// make sure all data path changes take effect
+	.endm	// dcacheattr_set
+
+#endif /* XCHAL_HAVE_MIMIC_CACHEATTR || XCHAL_HAVE_XLT_CACHEATTR */
+
+
+
+/*
+ *  cacheattr_set
+ *
+ *  Macro that sets the current CACHEATTR safely
+ *  (both i and d) according to the current contents of a2.
+ *  It works even when changing the cache attributes of
+ *  the currently running code.
+ *
+ *  Entry:
+ *	a2		cacheattr value to set
+ *  Exit:
+ *	a2		unchanged
+ *	a3-a8		clobbered (temporaries)
+ */
+	.macro	cacheattr_set
+
+#if XCHAL_HAVE_CACHEATTR
+# if XCHAL_ICACHE_LINESIZE < 4
+	//  No i-cache, so can always safely write to CACHEATTR:
+	wsr	a2, CACHEATTR
+# else
+	//  The Athens micro-architecture, when using the old
+	//  exception architecture option (ie. with the CACHEATTR register)
+	//  allows changing the cache attributes of the running code
+	//  using the following exact sequence aligned to be within
+	//  an instruction cache line.  (NOTE: using XCHAL_ICACHE_LINESIZE
+	//  alignment actually causes problems because that can be greater
+	//  than the alignment of the reset vector, where this macro is often
+	//  invoked, which would cause the linker to align the reset
+	//  vector code away from the reset vector!!).
+	j	1f
+	.align	16 /*XCHAL_ICACHE_LINESIZE*/	// align to within an I-cache line
+1:	_wsr	a2, CACHEATTR
+	_isync
+	nop
+	nop
+# endif
+#elif XCHAL_HAVE_MIMIC_CACHEATTR || XCHAL_HAVE_XLT_CACHEATTR
+	//  DTLB and ITLB are independent, but to keep semantics
+	//  of this macro we simply write to both.
+	icacheattr_set
+	dcacheattr_set
+#else
+	//  This macro isn't applicable to arbitrary MMU configurations.
+	//  Do nothing in this case.
+#endif
+	.endm
+
+
+#endif /*XTENSA_CACHEATTRASM_H*/
+

include/asm-xtensa/xtensa/config-linux_be/core.h

···
+/*
+ * xtensa/config/core.h -- HAL definitions that are dependent on CORE configuration
+ *
+ *  This header file is sometimes referred to as the "compile-time HAL" or CHAL.
+ *  It was generated for a specific Xtensa processor configuration.
+ *
+ *  Source for configuration-independent binaries (which link in a
+ *  configuration-specific HAL library) must NEVER include this file.
+ *  It is perfectly normal, however, for the HAL source itself to include this file.
+ */
+
+/*
+ * Copyright (c) 2003 Tensilica, Inc.  All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2.1 of the GNU Lesser General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like.  Any license provided herein, whether implied or
+ * otherwise, applies only to this software file.  Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, write the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307,
+ * USA.
+ */
+
+
+#ifndef XTENSA_CONFIG_CORE_H
+#define XTENSA_CONFIG_CORE_H
+
+#include <xtensa/hal.h>
+
+
+/*----------------------------------------------------------------------
+				GENERAL
+  ----------------------------------------------------------------------*/
+
+/*
+ *  Separators for macros that expand into arrays.
+ *  These can be predefined by files that #include this one,
+ *  when different separators are required.
+ */
+/*  Element separator for macros that expand into 1-dimensional arrays:  */
+#ifndef XCHAL_SEP
+#define XCHAL_SEP			,
+#endif
+/*  Array separator for macros that expand into 2-dimensional arrays:  */
+#ifndef XCHAL_SEP2
+#define XCHAL_SEP2			},{
+#endif
+
+
+/*----------------------------------------------------------------------
+				ENDIANNESS
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_BE			1
+#define XCHAL_HAVE_LE			0
+#define XCHAL_MEMORY_ORDER		XTHAL_BIGENDIAN
+
+
+/*----------------------------------------------------------------------
+				REGISTER WINDOWS
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_WINDOWED		1	/* 1 if windowed registers option configured, 0 otherwise */
+#define XCHAL_NUM_AREGS			64	/* number of physical address regs */
+#define XCHAL_NUM_AREGS_LOG2		6	/* log2(XCHAL_NUM_AREGS) */
+
+
+/*----------------------------------------------------------------------
+				ADDRESS ALIGNMENT
+  ----------------------------------------------------------------------*/
+
+/*  These apply to a selected set of core load and store instructions only (see ISA):  */
+#define XCHAL_UNALIGNED_LOAD_EXCEPTION	1	/* 1 if unaligned loads cause an exception, 0 otherwise */
+#define XCHAL_UNALIGNED_STORE_EXCEPTION	1	/* 1 if unaligned stores cause an exception, 0 otherwise */
+
+
+/*----------------------------------------------------------------------
+				INTERRUPTS
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_INTERRUPTS		1	/* 1 if interrupt option configured, 0 otherwise */
+#define XCHAL_HAVE_HIGHPRI_INTERRUPTS	1	/* 1 if high-priority interrupt option configured, 0 otherwise */
+#define XCHAL_HAVE_HIGHLEVEL_INTERRUPTS	XCHAL_HAVE_HIGHPRI_INTERRUPTS
+#define XCHAL_HAVE_NMI			0	/* 1 if NMI option configured, 0 otherwise */
+#define XCHAL_NUM_INTERRUPTS		17	/* number of interrupts */
+#define XCHAL_NUM_INTERRUPTS_LOG2	5	/* number of bits to hold an interrupt number: roundup(log2(number of interrupts)) */
+#define XCHAL_NUM_EXTINTERRUPTS		10	/* number of external interrupts */
+#define XCHAL_NUM_INTLEVELS		4	/* number of interrupt levels (not including level zero!) */
+#define XCHAL_NUM_LOWPRI_LEVELS		1			/* number of low-priority interrupt levels (always 1) */
+#define XCHAL_FIRST_HIGHPRI_LEVEL	(XCHAL_NUM_LOWPRI_LEVELS+1)	/* level of first high-priority interrupt (always 2) */
+#define XCHAL_EXCM_LEVEL		1			/* level of interrupts masked by PS.EXCM (XEA2 only; always 1 in T10xx);
+								   for XEA1, where there is no PS.EXCM, this is always 1;
+								   interrupts at levels FIRST_HIGHPRI <= n <= EXCM_LEVEL, if any,
+								   are termed "medium priority" interrupts (post T10xx only) */
+/*  Note:  1 <= LOWPRI_LEVELS <= EXCM_LEVEL < DEBUGLEVEL <= NUM_INTLEVELS < NMILEVEL <= 15  */
+
+/*  Masks of interrupts at each interrupt level:  */
+#define XCHAL_INTLEVEL0_MASK		0x00000000
+#define XCHAL_INTLEVEL1_MASK		0x000064F9
+#define XCHAL_INTLEVEL2_MASK		0x00008902
+#define XCHAL_INTLEVEL3_MASK		0x00011204
+#define XCHAL_INTLEVEL4_MASK		0x00000000
+#define XCHAL_INTLEVEL5_MASK		0x00000000
+#define XCHAL_INTLEVEL6_MASK		0x00000000
+#define XCHAL_INTLEVEL7_MASK		0x00000000
+#define XCHAL_INTLEVEL8_MASK		0x00000000
+#define XCHAL_INTLEVEL9_MASK		0x00000000
+#define XCHAL_INTLEVEL10_MASK		0x00000000
+#define XCHAL_INTLEVEL11_MASK		0x00000000
+#define XCHAL_INTLEVEL12_MASK		0x00000000
+#define XCHAL_INTLEVEL13_MASK		0x00000000
+#define XCHAL_INTLEVEL14_MASK		0x00000000
+#define XCHAL_INTLEVEL15_MASK		0x00000000
+/*  As an array of entries (eg. for C constant arrays):  */
+#define XCHAL_INTLEVEL_MASKS		0x00000000	XCHAL_SEP \
+					0x000064F9	XCHAL_SEP \
+					0x00008902	XCHAL_SEP \
+					0x00011204	XCHAL_SEP \
+					0x00000000	XCHAL_SEP \
+					0x00000000	XCHAL_SEP \
+					0x00000000	XCHAL_SEP \
+					0x00000000	XCHAL_SEP \
+					0x00000000	XCHAL_SEP \
+					0x00000000	XCHAL_SEP \
+					0x00000000	XCHAL_SEP \
+					0x00000000	XCHAL_SEP \
+					0x00000000	XCHAL_SEP \
+					0x00000000	XCHAL_SEP \
+					0x00000000	XCHAL_SEP \
+					0x00000000
+
+/*  Masks of interrupts at each range 1..n of interrupt levels:  */
+#define XCHAL_INTLEVEL0_ANDBELOW_MASK	0x00000000
+#define XCHAL_INTLEVEL1_ANDBELOW_MASK	0x000064F9
+#define XCHAL_INTLEVEL2_ANDBELOW_MASK	0x0000EDFB
+#define XCHAL_INTLEVEL3_ANDBELOW_MASK	0x0001FFFF
+#define XCHAL_INTLEVEL4_ANDBELOW_MASK	0x0001FFFF
+#define XCHAL_INTLEVEL5_ANDBELOW_MASK	0x0001FFFF
+#define XCHAL_INTLEVEL6_ANDBELOW_MASK	0x0001FFFF
+#define XCHAL_INTLEVEL7_ANDBELOW_MASK	0x0001FFFF
+#define XCHAL_INTLEVEL8_ANDBELOW_MASK	0x0001FFFF
+#define XCHAL_INTLEVEL9_ANDBELOW_MASK	0x0001FFFF
+#define XCHAL_INTLEVEL10_ANDBELOW_MASK	0x0001FFFF
+#define XCHAL_INTLEVEL11_ANDBELOW_MASK	0x0001FFFF
+#define XCHAL_INTLEVEL12_ANDBELOW_MASK	0x0001FFFF
+#define XCHAL_INTLEVEL13_ANDBELOW_MASK	0x0001FFFF
+#define XCHAL_INTLEVEL14_ANDBELOW_MASK	0x0001FFFF
+#define XCHAL_INTLEVEL15_ANDBELOW_MASK	0x0001FFFF
+#define XCHAL_LOWPRI_MASK		XCHAL_INTLEVEL1_ANDBELOW_MASK	/* mask of all low-priority interrupts */
+#define XCHAL_EXCM_MASK			XCHAL_INTLEVEL1_ANDBELOW_MASK	/* mask of all interrupts masked by PS.EXCM (or CEXCM) */
+/*  As an array of entries (eg. for C constant arrays):  */
+#define XCHAL_INTLEVEL_ANDBELOW_MASKS	0x00000000	XCHAL_SEP \
+					0x000064F9	XCHAL_SEP \
+					0x0000EDFB	XCHAL_SEP \
+					0x0001FFFF	XCHAL_SEP \
+					0x0001FFFF	XCHAL_SEP \
+					0x0001FFFF	XCHAL_SEP \
+					0x0001FFFF	XCHAL_SEP \
+					0x0001FFFF	XCHAL_SEP \
+					0x0001FFFF	XCHAL_SEP \
+					0x0001FFFF	XCHAL_SEP \
+					0x0001FFFF	XCHAL_SEP \
+					0x0001FFFF	XCHAL_SEP \
+					0x0001FFFF	XCHAL_SEP \
+					0x0001FFFF	XCHAL_SEP \
+					0x0001FFFF	XCHAL_SEP \
+					0x0001FFFF
+
+/*  Interrupt numbers for each interrupt level at which only one interrupt was configured:  */
+/*#define XCHAL_INTLEVEL1_NUM		...more than one interrupt at this level...*/
+/*#define XCHAL_INTLEVEL2_NUM		...more than one interrupt at this level...*/
+/*#define XCHAL_INTLEVEL3_NUM		...more than one interrupt at this level...*/
+
+/*  Level of each interrupt:  */
+#define XCHAL_INT0_LEVEL		1
+#define XCHAL_INT1_LEVEL		2
+#define XCHAL_INT2_LEVEL		3
+#define XCHAL_INT3_LEVEL		1
+#define XCHAL_INT4_LEVEL		1
+#define XCHAL_INT5_LEVEL		1
+#define XCHAL_INT6_LEVEL		1
+#define XCHAL_INT7_LEVEL		1
+#define XCHAL_INT8_LEVEL		2
+#define XCHAL_INT9_LEVEL		3
+#define XCHAL_INT10_LEVEL		1
+#define XCHAL_INT11_LEVEL		2
+#define XCHAL_INT12_LEVEL		3
+#define XCHAL_INT13_LEVEL		1
+#define XCHAL_INT14_LEVEL		1
+#define XCHAL_INT15_LEVEL		2
+#define XCHAL_INT16_LEVEL		3
+#define XCHAL_INT17_LEVEL		0
+#define XCHAL_INT18_LEVEL		0
+#define XCHAL_INT19_LEVEL		0
+#define XCHAL_INT20_LEVEL		0
+#define XCHAL_INT21_LEVEL		0
+#define XCHAL_INT22_LEVEL		0
+#define XCHAL_INT23_LEVEL		0
+#define XCHAL_INT24_LEVEL		0
+#define XCHAL_INT25_LEVEL		0
+#define XCHAL_INT26_LEVEL		0
+#define XCHAL_INT27_LEVEL		0
+#define XCHAL_INT28_LEVEL		0
+#define XCHAL_INT29_LEVEL		0
+#define XCHAL_INT30_LEVEL		0
+#define XCHAL_INT31_LEVEL		0
+/*  As an array of entries (eg. for C constant arrays):  */
+#define XCHAL_INT_LEVELS		1	XCHAL_SEP \
+					2	XCHAL_SEP \
+					3	XCHAL_SEP \
+					1	XCHAL_SEP \
+					1	XCHAL_SEP \
+					1	XCHAL_SEP \
+					1	XCHAL_SEP \
+					1	XCHAL_SEP \
+					2	XCHAL_SEP \
+					3	XCHAL_SEP \
+					1	XCHAL_SEP \
+					2	XCHAL_SEP \
+					3	XCHAL_SEP \
+					1	XCHAL_SEP \
+					1	XCHAL_SEP \
+					2	XCHAL_SEP \
+					3	XCHAL_SEP \
+					0	XCHAL_SEP \
+					0	XCHAL_SEP \
+					0	XCHAL_SEP \
+					0	XCHAL_SEP \
+					0	XCHAL_SEP \
+					0	XCHAL_SEP \
+					0	XCHAL_SEP \
+					0	XCHAL_SEP \
+					0	XCHAL_SEP \
+					0	XCHAL_SEP \
+					0	XCHAL_SEP \
+					0	XCHAL_SEP \
+					0	XCHAL_SEP \
+					0	XCHAL_SEP \
+					0
+
+/*  Type of each interrupt:  */
+#define XCHAL_INT0_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT1_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT2_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT3_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT4_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT5_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT6_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT7_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT8_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT9_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT10_TYPE 	XTHAL_INTTYPE_TIMER
+#define XCHAL_INT11_TYPE 	XTHAL_INTTYPE_TIMER
+#define XCHAL_INT12_TYPE 	XTHAL_INTTYPE_TIMER
+#define XCHAL_INT13_TYPE 	XTHAL_INTTYPE_SOFTWARE
+#define XCHAL_INT14_TYPE 	XTHAL_INTTYPE_SOFTWARE
+#define XCHAL_INT15_TYPE 	XTHAL_INTTYPE_SOFTWARE
+#define XCHAL_INT16_TYPE 	XTHAL_INTTYPE_SOFTWARE
+#define XCHAL_INT17_TYPE 	XTHAL_INTTYPE_UNCONFIGURED
+#define XCHAL_INT18_TYPE 	XTHAL_INTTYPE_UNCONFIGURED
+#define XCHAL_INT19_TYPE 	XTHAL_INTTYPE_UNCONFIGURED
+#define XCHAL_INT20_TYPE 	XTHAL_INTTYPE_UNCONFIGURED
+#define XCHAL_INT21_TYPE 	XTHAL_INTTYPE_UNCONFIGURED
+#define XCHAL_INT22_TYPE 	XTHAL_INTTYPE_UNCONFIGURED
+#define XCHAL_INT23_TYPE 	XTHAL_INTTYPE_UNCONFIGURED
+#define XCHAL_INT24_TYPE 	XTHAL_INTTYPE_UNCONFIGURED
+#define XCHAL_INT25_TYPE 	XTHAL_INTTYPE_UNCONFIGURED
+#define XCHAL_INT26_TYPE 	XTHAL_INTTYPE_UNCONFIGURED
+#define XCHAL_INT27_TYPE 	XTHAL_INTTYPE_UNCONFIGURED
+#define XCHAL_INT28_TYPE 	XTHAL_INTTYPE_UNCONFIGURED
+#define XCHAL_INT29_TYPE 	XTHAL_INTTYPE_UNCONFIGURED
+#define XCHAL_INT30_TYPE 	XTHAL_INTTYPE_UNCONFIGURED
+#define XCHAL_INT31_TYPE 	XTHAL_INTTYPE_UNCONFIGURED
+/*  As an array of entries (eg. for C constant arrays):  */
+#define XCHAL_INT_TYPES		XTHAL_INTTYPE_EXTERN_LEVEL     	XCHAL_SEP \
+				XTHAL_INTTYPE_EXTERN_LEVEL     	XCHAL_SEP \
+				XTHAL_INTTYPE_EXTERN_LEVEL     	XCHAL_SEP \
+				XTHAL_INTTYPE_EXTERN_LEVEL     	XCHAL_SEP \
+				XTHAL_INTTYPE_EXTERN_LEVEL     	XCHAL_SEP \
+				XTHAL_INTTYPE_EXTERN_LEVEL     	XCHAL_SEP \
+				XTHAL_INTTYPE_EXTERN_LEVEL     	XCHAL_SEP \
+				XTHAL_INTTYPE_EXTERN_EDGE     	XCHAL_SEP \
+				XTHAL_INTTYPE_EXTERN_EDGE     	XCHAL_SEP \
+				XTHAL_INTTYPE_EXTERN_EDGE     	XCHAL_SEP \
+				XTHAL_INTTYPE_TIMER     	XCHAL_SEP \
+				XTHAL_INTTYPE_TIMER     	XCHAL_SEP \
+				XTHAL_INTTYPE_TIMER     	XCHAL_SEP \
+				XTHAL_INTTYPE_SOFTWARE     	XCHAL_SEP \
+				XTHAL_INTTYPE_SOFTWARE     	XCHAL_SEP \
+				XTHAL_INTTYPE_SOFTWARE     	XCHAL_SEP \
+				XTHAL_INTTYPE_SOFTWARE     	XCHAL_SEP \
+				XTHAL_INTTYPE_UNCONFIGURED     	XCHAL_SEP \
+				XTHAL_INTTYPE_UNCONFIGURED     	XCHAL_SEP \
+				XTHAL_INTTYPE_UNCONFIGURED     	XCHAL_SEP \
+				XTHAL_INTTYPE_UNCONFIGURED     	XCHAL_SEP \
+				XTHAL_INTTYPE_UNCONFIGURED     	XCHAL_SEP \
+				XTHAL_INTTYPE_UNCONFIGURED     	XCHAL_SEP \
+				XTHAL_INTTYPE_UNCONFIGURED     	XCHAL_SEP \
+				XTHAL_INTTYPE_UNCONFIGURED     	XCHAL_SEP \
+				XTHAL_INTTYPE_UNCONFIGURED     	XCHAL_SEP \
+				XTHAL_INTTYPE_UNCONFIGURED     	XCHAL_SEP \
+				XTHAL_INTTYPE_UNCONFIGURED     	XCHAL_SEP \
+				XTHAL_INTTYPE_UNCONFIGURED     	XCHAL_SEP \
+				XTHAL_INTTYPE_UNCONFIGURED     	XCHAL_SEP \
+				XTHAL_INTTYPE_UNCONFIGURED     	XCHAL_SEP \
+				XTHAL_INTTYPE_UNCONFIGURED
+
+/*  Masks of interrupts for each type of interrupt:  */
+#define XCHAL_INTTYPE_MASK_UNCONFIGURED	0xFFFE0000
+#define XCHAL_INTTYPE_MASK_SOFTWARE	0x0001E000
+#define XCHAL_INTTYPE_MASK_EXTERN_EDGE	0x00000380
+#define XCHAL_INTTYPE_MASK_EXTERN_LEVEL	0x0000007F
+#define XCHAL_INTTYPE_MASK_TIMER	0x00001C00
+#define XCHAL_INTTYPE_MASK_NMI		0x00000000
+/*  As an array of entries (eg. for C constant arrays):  */
+#define XCHAL_INTTYPE_MASKS		0xFFFE0000	XCHAL_SEP \
+					0x0001E000	XCHAL_SEP \
+					0x00000380	XCHAL_SEP \
+					0x0000007F	XCHAL_SEP \
+					0x00001C00	XCHAL_SEP \
+					0x00000000
+
+/*  Interrupts assigned to each timer (CCOMPARE0 to CCOMPARE3), -1 if unassigned  */
+#define XCHAL_TIMER0_INTERRUPT	10
+#define XCHAL_TIMER1_INTERRUPT	11
+#define XCHAL_TIMER2_INTERRUPT	12
+#define XCHAL_TIMER3_INTERRUPT	XTHAL_TIMER_UNCONFIGURED
+/*  As an array of entries (eg. for C constant arrays):  */
+#define XCHAL_TIMER_INTERRUPTS	10	XCHAL_SEP \
+				11	XCHAL_SEP \
+				12	XCHAL_SEP \
+				XTHAL_TIMER_UNCONFIGURED
+
+/*  Indexing macros:  */
+#define _XCHAL_INTLEVEL_MASK(n)		XCHAL_INTLEVEL ## n ## _MASK
+#define XCHAL_INTLEVEL_MASK(n)		_XCHAL_INTLEVEL_MASK(n)		/* n = 0 .. 15 */
+#define _XCHAL_INTLEVEL_ANDBELOWMASK(n)	XCHAL_INTLEVEL ## n ## _ANDBELOW_MASK
+#define XCHAL_INTLEVEL_ANDBELOW_MASK(n)	_XCHAL_INTLEVEL_ANDBELOWMASK(n)	/* n = 0 .. 15 */
+#define _XCHAL_INT_LEVEL(n)		XCHAL_INT ## n ## _LEVEL
+#define XCHAL_INT_LEVEL(n)		_XCHAL_INT_LEVEL(n)		/* n = 0 .. 31 */
+#define _XCHAL_INT_TYPE(n)		XCHAL_INT ## n ## _TYPE
+#define XCHAL_INT_TYPE(n)		_XCHAL_INT_TYPE(n)		/* n = 0 .. 31 */
+#define _XCHAL_TIMER_INTERRUPT(n)	XCHAL_TIMER ## n ## _INTERRUPT
+#define XCHAL_TIMER_INTERRUPT(n)	_XCHAL_TIMER_INTERRUPT(n)	/* n = 0 .. 3 */
+
+
+
+/*
+ *  External interrupt vectors/levels.
+ *  These macros describe how Xtensa processor interrupt numbers
+ *  (as numbered internally, eg. in INTERRUPT and INTENABLE registers)
+ *  map to external BInterrupt<n> pins, for those interrupts
+ *  configured as external (level-triggered, edge-triggered, or NMI).
+ *  See the Xtensa processor databook for more details.
+ */
+
+/*  Core interrupt numbers mapped to each EXTERNAL interrupt number:  */
+#define XCHAL_EXTINT0_NUM		0	/* (intlevel 1) */
+#define XCHAL_EXTINT1_NUM		1	/* (intlevel 2) */
+#define XCHAL_EXTINT2_NUM		2	/* (intlevel 3) */
+#define XCHAL_EXTINT3_NUM		3	/* (intlevel 1) */
+#define XCHAL_EXTINT4_NUM		4	/* (intlevel 1) */
+#define XCHAL_EXTINT5_NUM		5	/* (intlevel 1) */
+#define XCHAL_EXTINT6_NUM		6	/* (intlevel 1) */
+#define XCHAL_EXTINT7_NUM		7	/* (intlevel 1) */
+#define XCHAL_EXTINT8_NUM		8	/* (intlevel 2) */
+#define XCHAL_EXTINT9_NUM		9	/* (intlevel 3) */
+
+/*  Corresponding interrupt masks:  */
+#define XCHAL_EXTINT0_MASK		0x00000001
+#define XCHAL_EXTINT1_MASK		0x00000002
+#define XCHAL_EXTINT2_MASK		0x00000004
+#define XCHAL_EXTINT3_MASK		0x00000008
+#define XCHAL_EXTINT4_MASK		0x00000010
+#define XCHAL_EXTINT5_MASK		0x00000020
+#define XCHAL_EXTINT6_MASK		0x00000040
+#define XCHAL_EXTINT7_MASK		0x00000080
+#define XCHAL_EXTINT8_MASK		0x00000100
+#define XCHAL_EXTINT9_MASK		0x00000200
+
+/*  Core config interrupt levels mapped to each external interrupt:  */
+#define XCHAL_EXTINT0_LEVEL		1	/* (int number 0) */
+#define XCHAL_EXTINT1_LEVEL		2	/* (int number 1) */
+#define XCHAL_EXTINT2_LEVEL		3	/* (int number 2) */
+#define XCHAL_EXTINT3_LEVEL		1	/* (int number 3) */
+#define XCHAL_EXTINT4_LEVEL		1	/* (int number 4) */
+#define XCHAL_EXTINT5_LEVEL		1	/* (int number 5) */
+#define XCHAL_EXTINT6_LEVEL		1	/* (int number 6) */
+#define XCHAL_EXTINT7_LEVEL		1	/* (int number 7) */
+#define XCHAL_EXTINT8_LEVEL		2	/* (int number 8) */
+#define XCHAL_EXTINT9_LEVEL		3	/* (int number 9) */
+
+
+/*----------------------------------------------------------------------
+			EXCEPTIONS and VECTORS
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_EXCEPTIONS		1	/* 1 if exception option configured, 0 otherwise */
+
+#define XCHAL_XEA_VERSION		2	/* Xtensa Exception Architecture number: 1 for XEA1 (old), 2 for XEA2 (new) */
+#define XCHAL_HAVE_XEA1			0	/* 1 if XEA1, 0 otherwise */
+#define XCHAL_HAVE_XEA2			1	/* 1 if XEA2, 0 otherwise */
+/*  For backward compatibility ONLY -- DO NOT USE (will be removed in future release):  */
+#define XCHAL_HAVE_OLD_EXC_ARCH		XCHAL_HAVE_XEA1	/* (DEPRECATED) 1 if old exception architecture (XEA1), 0 otherwise (eg. XEA2) */
+#define XCHAL_HAVE_EXCM			XCHAL_HAVE_XEA2	/* (DEPRECATED) 1 if PS.EXCM bit exists (currently equals XCHAL_HAVE_TLBS) */
+
+#define XCHAL_RESET_VECTOR_VADDR	0xFE000020
+#define XCHAL_RESET_VECTOR_PADDR	0xFE000020
+#define XCHAL_USER_VECTOR_VADDR		0xD0000220
+#define XCHAL_PROGRAMEXC_VECTOR_VADDR	XCHAL_USER_VECTOR_VADDR		/* for backward compatibility */
+#define XCHAL_USEREXC_VECTOR_VADDR	XCHAL_USER_VECTOR_VADDR		/* for backward compatibility */
+#define XCHAL_USER_VECTOR_PADDR		0x00000220
+#define XCHAL_PROGRAMEXC_VECTOR_PADDR	XCHAL_USER_VECTOR_PADDR		/* for backward compatibility */
+#define XCHAL_USEREXC_VECTOR_PADDR	XCHAL_USER_VECTOR_PADDR		/* for backward compatibility */
+#define XCHAL_KERNEL_VECTOR_VADDR	0xD0000200
+#define XCHAL_STACKEDEXC_VECTOR_VADDR	XCHAL_KERNEL_VECTOR_VADDR	/* for backward compatibility */
+#define XCHAL_KERNELEXC_VECTOR_VADDR	XCHAL_KERNEL_VECTOR_VADDR	/* for backward compatibility */
+#define XCHAL_KERNEL_VECTOR_PADDR	0x00000200
+#define XCHAL_STACKEDEXC_VECTOR_PADDR	XCHAL_KERNEL_VECTOR_PADDR	/* for backward compatibility */
+#define XCHAL_KERNELEXC_VECTOR_PADDR	XCHAL_KERNEL_VECTOR_PADDR	/* for backward compatibility */
+#define XCHAL_DOUBLEEXC_VECTOR_VADDR	0xD0000290
+#define XCHAL_DOUBLEEXC_VECTOR_PADDR	0x00000290
+#define XCHAL_WINDOW_VECTORS_VADDR	0xD0000000
+#define XCHAL_WINDOW_VECTORS_PADDR	0x00000000
+#define XCHAL_INTLEVEL2_VECTOR_VADDR	0xD0000240
+#define XCHAL_INTLEVEL2_VECTOR_PADDR	0x00000240
+#define XCHAL_INTLEVEL3_VECTOR_VADDR	0xD0000250
+#define XCHAL_INTLEVEL3_VECTOR_PADDR	0x00000250
+#define XCHAL_INTLEVEL4_VECTOR_VADDR	0xFE000520
+#define XCHAL_INTLEVEL4_VECTOR_PADDR	0xFE000520
+#define XCHAL_DEBUG_VECTOR_VADDR	XCHAL_INTLEVEL4_VECTOR_VADDR
+#define XCHAL_DEBUG_VECTOR_PADDR	XCHAL_INTLEVEL4_VECTOR_PADDR
+
+/*  Indexing macros:  */
+#define _XCHAL_INTLEVEL_VECTOR_VADDR(n)		XCHAL_INTLEVEL ## n ## _VECTOR_VADDR
+#define XCHAL_INTLEVEL_VECTOR_VADDR(n)		_XCHAL_INTLEVEL_VECTOR_VADDR(n)		/* n = 0 .. 15 */
+
+/*
+ *  General Exception Causes
+ *  (values of EXCCAUSE special register set by general exceptions,
+ *   which vector to the user, kernel, or double-exception vectors):
+ */
+#define XCHAL_EXCCAUSE_ILLEGAL_INSTRUCTION		0	/* Illegal Instruction (IllegalInstruction) */
+#define XCHAL_EXCCAUSE_SYSTEM_CALL			1	/* System Call (SystemCall) */
+#define XCHAL_EXCCAUSE_INSTRUCTION_FETCH_ERROR		2	/* Instruction Fetch Error (InstructionFetchError) */
+#define XCHAL_EXCCAUSE_LOAD_STORE_ERROR			3	/* Load Store Error (LoadStoreError) */
+#define XCHAL_EXCCAUSE_LEVEL1_INTERRUPT			4	/* Level 1 Interrupt (Level1Interrupt) */
+#define XCHAL_EXCCAUSE_ALLOCA				5	/* Stack Extension Assist (Alloca) */
+#define XCHAL_EXCCAUSE_INTEGER_DIVIDE_BY_ZERO		6	/* Integer Divide by Zero (IntegerDivideByZero) */
+#define XCHAL_EXCCAUSE_SPECULATION			7	/* Speculation (Speculation) */
+#define XCHAL_EXCCAUSE_PRIVILEGED			8	/* Privileged Instruction (Privileged) */
+#define XCHAL_EXCCAUSE_UNALIGNED			9	/* Unaligned Load Store (Unaligned) */
+#define XCHAL_EXCCAUSE_ITLB_MISS			16	/* ITlb Miss Exception (ITlbMiss) */
+#define XCHAL_EXCCAUSE_ITLB_MULTIHIT			17	/* ITlb Mutltihit Exception (ITlbMultihit) */
+#define XCHAL_EXCCAUSE_ITLB_PRIVILEGE			18	/* ITlb Privilege Exception (ITlbPrivilege) */
+#define XCHAL_EXCCAUSE_ITLB_SIZE_RESTRICTION		19	/* ITlb Size Restriction Exception (ITlbSizeRestriction) */
+#define XCHAL_EXCCAUSE_FETCH_CACHE_ATTRIBUTE		20	/* Fetch Cache Attribute Exception (FetchCacheAttribute) */
+#define XCHAL_EXCCAUSE_DTLB_MISS			24	/* DTlb Miss Exception (DTlbMiss) */
+#define XCHAL_EXCCAUSE_DTLB_MULTIHIT			25	/* DTlb Multihit Exception (DTlbMultihit) */
+#define XCHAL_EXCCAUSE_DTLB_PRIVILEGE			26	/* DTlb Privilege Exception (DTlbPrivilege) */
+#define XCHAL_EXCCAUSE_DTLB_SIZE_RESTRICTION		27	/* DTlb Size Restriction Exception (DTlbSizeRestriction) */
+#define XCHAL_EXCCAUSE_LOAD_CACHE_ATTRIBUTE		28	/* Load Cache Attribute Exception (LoadCacheAttribute) */
+#define XCHAL_EXCCAUSE_STORE_CACHE_ATTRIBUTE		29	/* Store Cache Attribute Exception (StoreCacheAttribute) */
+#define XCHAL_EXCCAUSE_FLOATING_POINT			40	/* Floating Point Exception (FloatingPoint) */
+
+
+
+/*----------------------------------------------------------------------
+				TIMERS
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_CCOUNT		1	/* 1 if have CCOUNT, 0 otherwise */
+/*#define XCHAL_HAVE_TIMERS		XCHAL_HAVE_CCOUNT*/
+#define XCHAL_NUM_TIMERS		3	/* number of CCOMPAREn regs */
+
+
+
+/*----------------------------------------------------------------------
+				DEBUG
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_DEBUG		1	/* 1 if debug option configured, 0 otherwise */
+#define XCHAL_HAVE_OCD			1	/* 1 if OnChipDebug option configured, 0 otherwise */
+#define XCHAL_NUM_IBREAK		2	/* number of IBREAKn regs */
+#define XCHAL_NUM_DBREAK		2	/* number of DBREAKn regs */
+#define XCHAL_DEBUGLEVEL		4	/* debug interrupt level */
+/*DebugExternalInterrupt		0		0|1*/
+/*DebugUseDIRArray			0		0|1*/
+
+
+
+
+/*----------------------------------------------------------------------
+			COPROCESSORS and EXTRA STATE
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_CP			0	/* 1 if coprocessor option configured (CPENABLE present) */
+#define XCHAL_CP_MAXCFG			0	/* max allowed cp id plus one (per cfg) */
+
+#include <xtensa/config/tie.h>
+
+
+
+
+/*----------------------------------------------------------------------
+			INTERNAL I/D RAM/ROMs and XLMI
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_NUM_INSTROM		0	/* number of core instruction ROMs configured */
+#define XCHAL_NUM_INSTRAM		0	/* number of core instruction RAMs configured */
+#define XCHAL_NUM_DATAROM		0	/* number of core data ROMs configured */
+#define XCHAL_NUM_DATARAM		0	/* number of core data RAMs configured */
+#define XCHAL_NUM_XLMI			0	/* number of core XLMI ports configured */
+#define  XCHAL_NUM_IROM			XCHAL_NUM_INSTROM	/* (DEPRECATED) */
+#define  XCHAL_NUM_IRAM			XCHAL_NUM_INSTRAM	/* (DEPRECATED) */
+#define  XCHAL_NUM_DROM			XCHAL_NUM_DATAROM	/* (DEPRECATED) */
+#define  XCHAL_NUM_DRAM			XCHAL_NUM_DATARAM	/* (DEPRECATED) */
+
+
+
+/*----------------------------------------------------------------------
+				CACHE
+  ----------------------------------------------------------------------*/
+
+/*  Size of the cache lines in log2(bytes):  */
+#define XCHAL_ICACHE_LINEWIDTH		4
+#define XCHAL_DCACHE_LINEWIDTH		4
+/*  Size of the cache lines in bytes:  */
+#define XCHAL_ICACHE_LINESIZE		16
+#define XCHAL_DCACHE_LINESIZE		16
+/*  Max for both I-cache and D-cache (used for general alignment):  */
+#define XCHAL_CACHE_LINEWIDTH_MAX	4
+#define XCHAL_CACHE_LINESIZE_MAX	16
+
+/*  Number of cache sets in log2(lines per way):  */
+#define XCHAL_ICACHE_SETWIDTH		8
+#define XCHAL_DCACHE_SETWIDTH		8
+/*  Max for both I-cache and D-cache (used for general cache-coherency page alignment):  */
+#define XCHAL_CACHE_SETWIDTH_MAX	8
+#define XCHAL_CACHE_SETSIZE_MAX		256
+
+/*  Cache set associativity (number of ways):  */
+#define XCHAL_ICACHE_WAYS		2
+#define XCHAL_DCACHE_WAYS		2
+
+/*  Size of the caches in bytes (ways * 2^(linewidth + setwidth)):  */
+#define XCHAL_ICACHE_SIZE		8192
+#define XCHAL_DCACHE_SIZE		8192
+
+/*  Cache features:  */
+#define XCHAL_DCACHE_IS_WRITEBACK	0
+/*  Whether cache locking feature is available:  */
+#define XCHAL_ICACHE_LINE_LOCKABLE	0
+#define XCHAL_DCACHE_LINE_LOCKABLE	0
+
+/*  Number of (encoded) cache attribute bits:  */
+#define XCHAL_CA_BITS			4	/* number of bits needed to hold cache attribute encoding */
+/*  (The number of access mode bits (decoded cache attribute bits) is defined by the architecture; see xtensa/hal.h?)  */
+
+
+/*  Cache Attribute encodings -- lists of access modes for each cache attribute:  */
+#define XCHAL_FCA_LIST		XTHAL_FAM_EXCEPTION	XCHAL_SEP \
+				XTHAL_FAM_BYPASS	XCHAL_SEP \
+				XTHAL_FAM_EXCEPTION	XCHAL_SEP \
+				XTHAL_FAM_BYPASS	XCHAL_SEP \
+				XTHAL_FAM_EXCEPTION	XCHAL_SEP \
+				XTHAL_FAM_CACHED	XCHAL_SEP \
+				XTHAL_FAM_EXCEPTION	XCHAL_SEP \
+				XTHAL_FAM_CACHED	XCHAL_SEP \
+				XTHAL_FAM_EXCEPTION	XCHAL_SEP \
+				XTHAL_FAM_CACHED	XCHAL_SEP \
+				XTHAL_FAM_EXCEPTION	XCHAL_SEP \
+				XTHAL_FAM_CACHED	XCHAL_SEP \
+				XTHAL_FAM_EXCEPTION	XCHAL_SEP \
+				XTHAL_FAM_EXCEPTION	XCHAL_SEP \
+				XTHAL_FAM_EXCEPTION	XCHAL_SEP \
+				XTHAL_FAM_EXCEPTION
+#define XCHAL_LCA_LIST		XTHAL_LAM_EXCEPTION	XCHAL_SEP \
+				XTHAL_LAM_BYPASSG	XCHAL_SEP \
+				XTHAL_LAM_EXCEPTION	XCHAL_SEP \
+				XTHAL_LAM_BYPASSG	XCHAL_SEP \
+				XTHAL_LAM_EXCEPTION	XCHAL_SEP \
+				XTHAL_LAM_CACHED	XCHAL_SEP \
+				XTHAL_LAM_EXCEPTION	XCHAL_SEP \
+				XTHAL_LAM_CACHED	XCHAL_SEP \
+				XTHAL_LAM_EXCEPTION	XCHAL_SEP \
+				XTHAL_LAM_NACACHED	XCHAL_SEP \
+				XTHAL_LAM_EXCEPTION	XCHAL_SEP \
+				XTHAL_LAM_NACACHED	XCHAL_SEP \
+				XTHAL_LAM_EXCEPTION	XCHAL_SEP \
+				XTHAL_LAM_ISOLATE	XCHAL_SEP \
+				XTHAL_LAM_EXCEPTION	XCHAL_SEP \
+				XTHAL_LAM_CACHED
+#define XCHAL_SCA_LIST		XTHAL_SAM_EXCEPTION	XCHAL_SEP \
+				XTHAL_SAM_EXCEPTION	XCHAL_SEP \
+				XTHAL_SAM_EXCEPTION	XCHAL_SEP \
+				XTHAL_SAM_BYPASS	XCHAL_SEP \
+				XTHAL_SAM_EXCEPTION	XCHAL_SEP \
+				XTHAL_SAM_EXCEPTION	XCHAL_SEP \
+				XTHAL_SAM_EXCEPTION	XCHAL_SEP \
+				XTHAL_SAM_WRITETHRU	XCHAL_SEP \
+				XTHAL_SAM_EXCEPTION	XCHAL_SEP \
+				XTHAL_SAM_EXCEPTION	XCHAL_SEP \
+				XTHAL_SAM_EXCEPTION	XCHAL_SEP \
+				XTHAL_SAM_WRITETHRU	XCHAL_SEP \
+				XTHAL_SAM_EXCEPTION	XCHAL_SEP \
+				XTHAL_SAM_ISOLATE	XCHAL_SEP \
+				XTHAL_SAM_EXCEPTION	XCHAL_SEP \
+				XTHAL_SAM_WRITETHRU
+
+/*  Test:
+	read/only: 0 + 1 + 2 + 4 + 5 + 6 + 8 + 9 + 10 + 12 + 14
+	read/only: 0 + 1 + 2 + 4 + 5 + 6 + 8 + 9 + 10 + 12 + 14
+	all:       0 + 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 + 11 + 12 + 13 + 14 + 15
+	fault:     0 + 2 + 4 + 6 + 8 + 10 + 12 + 14
+	r/w/x cached:
+	r/w/x dcached:
+	I-bypass:  1 + 3
+
+	load guard bit set: 1 + 3
+	load guard bit clr: 0 + 2 + 4 + 5 + 6 + 7 + 8 + 9 + 10 + 11 + 12 + 13 + 14 + 15
+	hit-cache r/w/x: 7 + 11
+
+	fams: 5
+	fams: 0 / 6 / 18 / 1 / 2
+	fams: Bypass / Isolate / Cached / Exception / NACached
+
+        MMU okay:  yes
+*/
+
+
+/*----------------------------------------------------------------------
+				MMU
+  ----------------------------------------------------------------------*/
+
+/*
+ *  General notes on MMU parameters.
+ *
+ *  Terminology:
+ *	ASID = address-space ID (acts as an "extension" of virtual addresses)
+ *	VPN  = virtual page number
+ *	PPN  = physical page number
+ *	CA   = encoded cache attribute (access modes)
+ *	TLB  = translation look-aside buffer (term is stretched somewhat here)
+ *	I    = instruction (fetch accesses)
+ *	D    = data (load and store accesses)
+ *	way  = each TLB (ITLB and DTLB) consists of a number of "ways"
+ *		that simultaneously match the virtual address of an access;
+ *		a TLB successfully translates a virtual address if exactly
+ *		one way matches the vaddr; if none match, it is a miss;
+ *		if multiple match, one gets a "multihit" exception;
+ *		each way can be independently configured in terms of number of
+ *		entries, page sizes, which fields are writable or constant, etc.
+ *	set  = group of contiguous ways with exactly identical parameters
+ *	ARF  = auto-refill; hardware services a 1st-level miss by loading a PTE
+ *		from the page table and storing it in one of the auto-refill ways;
+ *		if this PTE load also misses, a miss exception is posted for s/w.
+ *	min-wired = a "min-wired" way can be used to map a single (minimum-sized)
+ * 		page arbitrarily under program control; it has a single entry,
+ *		is non-auto-refill (some other way(s) must be auto-refill),
+ *		all its fields (VPN, PPN, ASID, CA) are all writable, and it
+ *		supports the XCHAL_MMU_MIN_PTE_PAGE_SIZE page size (a current
+ *		restriction is that this be the only page size it supports).
+ *
+ *  TLB way entries are virtually indexed.
+ *  TLB ways that support multiple page sizes:
+ *	- must have all writable VPN and PPN fields;
+ *	- can only use one page size at any given time (eg. setup at startup),
+ *	  selected by the respective ITLBCFG or DTLBCFG special register,
+ *	  whose bits n*4+3 .. n*4 index the list of page sizes for way n
+ *	  (XCHAL_xTLB_SETm_PAGESZ_LOG2_LIST for set m corresponding to way n);
+ *	  this list may be sparse for auto-refill ways because auto-refill
+ *	  ways have independent lists of supported page sizes sharing a
+ *	  common encoding with PTE entries; the encoding is the index into
+ *	  this list; unsupported sizes for a given way are zero in the list;
+ *	  selecting unsupported sizes results in undefined hardware behaviour;
+ *	- is only possible for ways 0 thru 7 (due to ITLBCFG/DTLBCFG definition).
+ */
+
+#define XCHAL_HAVE_CACHEATTR		0	/* 1 if CACHEATTR register present, 0 if TLBs present instead */
+#define XCHAL_HAVE_TLBS			1	/* 1 if TLBs present, 0 if CACHEATTR present instead */
+#define XCHAL_HAVE_MMU			XCHAL_HAVE_TLBS	/* (DEPRECATED; use XCHAL_HAVE_TLBS instead; will be removed in future release) */
+#define XCHAL_HAVE_SPANNING_WAY		0	/* 1 if single way maps entire virtual address space in I+D */
+#define XCHAL_HAVE_IDENTITY_MAP		0	/* 1 if virtual addr == physical addr always, 0 otherwise */
+#define XCHAL_HAVE_MIMIC_CACHEATTR	0	/* 1 if have MMU that mimics a CACHEATTR config (CaMMU) */
+#define XCHAL_HAVE_XLT_CACHEATTR	0	/* 1 if have MMU that mimics a CACHEATTR config, but with translation (CaXltMMU) */
+
+#define XCHAL_MMU_ASID_BITS		8	/* number of bits in ASIDs (address space IDs) */
+#define XCHAL_MMU_ASID_INVALID		0	/* ASID value indicating invalid address space */
+#define XCHAL_MMU_ASID_KERNEL		1	/* ASID value indicating kernel (ring 0) address space */
+#define XCHAL_MMU_RINGS			4	/* number of rings supported (1..4) */
+#define XCHAL_MMU_RING_BITS		2	/* number of bits needed to hold ring number */
+#define XCHAL_MMU_SR_BITS		0	/* number of size-restriction bits supported */
+#define XCHAL_MMU_CA_BITS		4	/* number of bits needed to hold cache attribute encoding */
+#define XCHAL_MMU_MAX_PTE_PAGE_SIZE	12	/* max page size in a PTE structure (log2) */
+#define XCHAL_MMU_MIN_PTE_PAGE_SIZE	12	/* min page size in a PTE structure (log2) */
+
+
+/***  Instruction TLB:  ***/
+
+#define XCHAL_ITLB_WAY_BITS		3	/* number of bits holding the ways */
+#define XCHAL_ITLB_WAYS			7	/* number of ways (n-way set-associative TLB) */
+#define XCHAL_ITLB_ARF_WAYS		4	/* number of auto-refill ways */
+#define XCHAL_ITLB_SETS			4	/* number of sets (groups of ways with identical settings) */
+
+/*  Way set to which each way belongs:  */
+#define XCHAL_ITLB_WAY0_SET		0
+#define XCHAL_ITLB_WAY1_SET		0
+#define XCHAL_ITLB_WAY2_SET		0
+#define XCHAL_ITLB_WAY3_SET		0
+#define XCHAL_ITLB_WAY4_SET		1
+#define XCHAL_ITLB_WAY5_SET		2
+#define XCHAL_ITLB_WAY6_SET		3
+
+/*  Ways sets that are used by hardware auto-refill (ARF):  */
+#define XCHAL_ITLB_ARF_SETS		1	/* number of auto-refill sets */
+#define XCHAL_ITLB_ARF_SET0		0	/* index of n'th auto-refill set */
+
+/*  Way sets that are "min-wired" (see terminology comment above):  */
+#define XCHAL_ITLB_MINWIRED_SETS	0	/* number of "min-wired" sets */
+
+
+/*  ITLB way set 0 (group of ways 0 thru 3):  */
+#define XCHAL_ITLB_SET0_WAY			0	/* index of first way in this way set */
+#define XCHAL_ITLB_SET0_WAYS			4	/* number of (contiguous) ways in this way set */
+#define XCHAL_ITLB_SET0_ENTRIES_LOG2		2	/* log2(number of entries in this way) */
+#define XCHAL_ITLB_SET0_ENTRIES			4	/* number of entries in this way (always a power of 2) */
+#define XCHAL_ITLB_SET0_ARF			1	/* 1=autorefill by h/w, 0=non-autorefill (wired/constant/static) */
+#define XCHAL_ITLB_SET0_PAGESIZES		1	/* number of supported page sizes in this way */
+#define XCHAL_ITLB_SET0_PAGESZ_BITS		0	/* number of bits to encode the page size */
+#define XCHAL_ITLB_SET0_PAGESZ_LOG2_MIN		12	/* log2(minimum supported page size) */
+#define XCHAL_ITLB_SET0_PAGESZ_LOG2_MAX		12	/* log2(maximum supported page size) */
+#define XCHAL_ITLB_SET0_PAGESZ_LOG2_LIST	12	/* list of log2(page size)s, separated by XCHAL_SEP;
+							   2^PAGESZ_BITS entries in list, unsupported entries are zero */
+#define XCHAL_ITLB_SET0_ASID_CONSTMASK		0	/* constant ASID bits; 0 if all writable */
+#define XCHAL_ITLB_SET0_VPN_CONSTMASK		0	/* constant VPN bits, not including entry index bits; 0 if all writable */
+#define XCHAL_ITLB_SET0_PPN_CONSTMASK		0	/* constant PPN bits, including entry index bits; 0 if all writable */
+#define XCHAL_ITLB_SET0_CA_CONSTMASK		0	/* constant CA bits; 0 if all writable */
+#define XCHAL_ITLB_SET0_ASID_RESET		0	/* 1 if ASID reset values defined (and all writable); 0 otherwise */
+#define XCHAL_ITLB_SET0_VPN_RESET		0	/* 1 if VPN reset values defined (and all writable); 0 otherwise */
+#define XCHAL_ITLB_SET0_PPN_RESET		0	/* 1 if PPN reset values defined (and all writable); 0 otherwise */
+#define XCHAL_ITLB_SET0_CA_RESET		0	/* 1 if CA reset values defined (and all writable); 0 otherwise */
+
+/*  ITLB way set 1 (group of ways 4 thru 4):  */
+#define XCHAL_ITLB_SET1_WAY			4	/* index of first way in this way set */
+#define XCHAL_ITLB_SET1_WAYS			1	/* number of (contiguous) ways in this way set */
+#define XCHAL_ITLB_SET1_ENTRIES_LOG2		2	/* log2(number of entries in this way) */
+#define XCHAL_ITLB_SET1_ENTRIES			4	/* number of entries in this way (always a power of 2) */
+#define XCHAL_ITLB_SET1_ARF			0	/* 1=autorefill by h/w, 0=non-autorefill (wired/constant/static) */
+#define XCHAL_ITLB_SET1_PAGESIZES		4	/* number of supported page sizes in this way */
+#define XCHAL_ITLB_SET1_PAGESZ_BITS		2	/* number of bits to encode the page size */
+#define XCHAL_ITLB_SET1_PAGESZ_LOG2_MIN		20	/* log2(minimum supported page size) */
+#define XCHAL_ITLB_SET1_PAGESZ_LOG2_MAX		26	/* log2(maximum supported page size) */
+#define XCHAL_ITLB_SET1_PAGESZ_LOG2_LIST	20 XCHAL_SEP 22 XCHAL_SEP 24 XCHAL_SEP 26	/* list of log2(page size)s, separated by XCHAL_SEP;
+							   2^PAGESZ_BITS entries in list, unsupported entries are zero */
+#define XCHAL_ITLB_SET1_ASID_CONSTMASK		0	/* constant ASID bits; 0 if all writable */
+#define XCHAL_ITLB_SET1_VPN_CONSTMASK		0	/* constant VPN bits, not including entry index bits; 0 if all writable */
+#define XCHAL_ITLB_SET1_PPN_CONSTMASK		0	/* constant PPN bits, including entry index bits; 0 if all writable */
+#define XCHAL_ITLB_SET1_CA_CONSTMASK		0	/* constant CA bits; 0 if all writable */
+#define XCHAL_ITLB_SET1_ASID_RESET		0	/* 1 if ASID reset values defined (and all writable); 0 otherwise */
+#define XCHAL_ITLB_SET1_VPN_RESET		0	/* 1 if VPN reset values defined (and all writable); 0 otherwise */
+#define XCHAL_ITLB_SET1_PPN_RESET		0	/* 1 if PPN reset values defined (and all writable); 0 otherwise */
+#define XCHAL_ITLB_SET1_CA_RESET		0	/* 1 if CA reset values defined (and all writable); 0 otherwise */
+
+/*  ITLB way set 2 (group of ways 5 thru 5):  */
+#define XCHAL_ITLB_SET2_WAY			5	/* index of first way in this way set */
+#define XCHAL_ITLB_SET2_WAYS			1	/* number of (contiguous) ways in this way set */
+#define XCHAL_ITLB_SET2_ENTRIES_LOG2		1	/* log2(number of entries in this way) */
+#define XCHAL_ITLB_SET2_ENTRIES			2	/* number of entries in this way (always a power of 2) */
+#define XCHAL_ITLB_SET2_ARF			0	/* 1=autorefill by h/w, 0=non-autorefill (wired/constant/static) */
+#define XCHAL_ITLB_SET2_PAGESIZES		1	/* number of supported page sizes in this way */
+#define XCHAL_ITLB_SET2_PAGESZ_BITS		0	/* number of bits to encode the page size */
+#define XCHAL_ITLB_SET2_PAGESZ_LOG2_MIN		27	/* log2(minimum supported page size) */
+#define XCHAL_ITLB_SET2_PAGESZ_LOG2_MAX		27	/* log2(maximum supported page size) */
+#define XCHAL_ITLB_SET2_PAGESZ_LOG2_LIST	27	/* list of log2(page size)s, separated by XCHAL_SEP;
+							   2^PAGESZ_BITS entries in list, unsupported entries are zero */
+#define XCHAL_ITLB_SET2_ASID_CONSTMASK		0xFF	/* constant ASID bits; 0 if all writable */
+#define XCHAL_ITLB_SET2_VPN_CONSTMASK		0xF0000000	/* constant VPN bits, not including entry index bits; 0 if all writable */
+#define XCHAL_ITLB_SET2_PPN_CONSTMASK		0xF8000000	/* constant PPN bits, including entry index bits; 0 if all writable */
+#define XCHAL_ITLB_SET2_CA_CONSTMASK		0x0000000F	/* constant CA bits; 0 if all writable */
+#define XCHAL_ITLB_SET2_ASID_RESET		0	/* 1 if ASID reset values defined (and all writable); 0 otherwise */
+#define XCHAL_ITLB_SET2_VPN_RESET		0	/* 1 if VPN reset values defined (and all writable); 0 otherwise */
+#define XCHAL_ITLB_SET2_PPN_RESET		0	/* 1 if PPN reset values defined (and all writable); 0 otherwise */
+#define XCHAL_ITLB_SET2_CA_RESET		0	/* 1 if CA reset values defined (and all writable); 0 otherwise */
+/*  Constant ASID values for each entry of ITLB way set 2 (because ASID_CONSTMASK is non-zero):  */
+#define XCHAL_ITLB_SET2_E0_ASID_CONST		0x01
+#define XCHAL_ITLB_SET2_E1_ASID_CONST		0x01
+/*  Constant VPN values for each entry of ITLB way set 2 (because VPN_CONSTMASK is non-zero):  */
+#define XCHAL_ITLB_SET2_E0_VPN_CONST		0xD0000000
+#define XCHAL_ITLB_SET2_E1_VPN_CONST		0xD8000000
+/*  Constant PPN values for each entry of ITLB way set 2 (because PPN_CONSTMASK is non-zero):  */
+#define XCHAL_ITLB_SET2_E0_PPN_CONST		0x00000000
+#define XCHAL_ITLB_SET2_E1_PPN_CONST		0x00000000
+/*  Constant CA values for each entry of ITLB way set 2 (because CA_CONSTMASK is non-zero):  */
+#define XCHAL_ITLB_SET2_E0_CA_CONST		0x07
+#define XCHAL_ITLB_SET2_E1_CA_CONST		0x03
+
+/*  ITLB way set 3 (group of ways 6 thru 6):  */
+#define XCHAL_ITLB_SET3_WAY			6	/* index of first way in this way set */
+#define XCHAL_ITLB_SET3_WAYS			1	/* number of (contiguous) ways in this way set */
+#define XCHAL_ITLB_SET3_ENTRIES_LOG2		1	/* log2(number of entries in this way) */
+#define XCHAL_ITLB_SET3_ENTRIES			2	/* number of entries in this way (always a power of 2) */
+#define XCHAL_ITLB_SET3_ARF			0	/* 1=autorefill by h/w, 0=non-autorefill (wired/constant/static) */
+#define XCHAL_ITLB_SET3_PAGESIZES		1	/* number of supported page sizes in this way */
+#define XCHAL_ITLB_SET3_PAGESZ_BITS		0	/* number of bits to encode the page size */
+#define XCHAL_ITLB_SET3_PAGESZ_LOG2_MIN		28	/* log2(minimum supported page size) */
+#define XCHAL_ITLB_SET3_PAGESZ_LOG2_MAX		28	/* log2(maximum supported page size) */
+#define XCHAL_ITLB_SET3_PAGESZ_LOG2_LIST	28	/* list of log2(page size)s, separated by XCHAL_SEP;
+							   2^PAGESZ_BITS entries in list, unsupported entries are zero */
+#define XCHAL_ITLB_SET3_ASID_CONSTMASK		0xFF	/* constant ASID bits; 0 if all writable */
+#define XCHAL_ITLB_SET3_VPN_CONSTMASK		0xE0000000	/* constant VPN bits, not including entry index bits; 0 if all writable */
+#define XCHAL_ITLB_SET3_PPN_CONSTMASK		0xF0000000	/* constant PPN bits, including entry index bits; 0 if all writable */
+#define XCHAL_ITLB_SET3_CA_CONSTMASK		0x0000000F	/* constant CA bits; 0 if all writable */
+#define XCHAL_ITLB_SET3_ASID_RESET		0	/* 1 if ASID reset values defined (and all writable); 0 otherwise */
+#define XCHAL_ITLB_SET3_VPN_RESET		0	/* 1 if VPN reset values defined (and all writable); 0 otherwise */
+#define XCHAL_ITLB_SET3_PPN_RESET		0	/* 1 if PPN reset values defined (and all writable); 0 otherwise */
+#define XCHAL_ITLB_SET3_CA_RESET		0	/* 1 if CA reset values defined (and all writable); 0 otherwise */
+/*  Constant ASID values for each entry of ITLB way set 3 (because ASID_CONSTMASK is non-zero):  */
+#define XCHAL_ITLB_SET3_E0_ASID_CONST		0x01
+#define XCHAL_ITLB_SET3_E1_ASID_CONST		0x01
+/*  Constant VPN values for each entry of ITLB way set 3 (because VPN_CONSTMASK is non-zero):  */
+#define XCHAL_ITLB_SET3_E0_VPN_CONST		0xE0000000
+#define XCHAL_ITLB_SET3_E1_VPN_CONST		0xF0000000
+/*  Constant PPN values for each entry of ITLB way set 3 (because PPN_CONSTMASK is non-zero):  */
+#define XCHAL_ITLB_SET3_E0_PPN_CONST		0xF0000000
+#define XCHAL_ITLB_SET3_E1_PPN_CONST		0xF0000000
+/*  Constant CA values for each entry of ITLB way set 3 (because CA_CONSTMASK is non-zero):  */
+#define XCHAL_ITLB_SET3_E0_CA_CONST		0x07
+#define XCHAL_ITLB_SET3_E1_CA_CONST		0x03
+
+/*  Indexing macros:  */
+#define _XCHAL_ITLB_SET(n,_what)	XCHAL_ITLB_SET ## n ## _what
+#define XCHAL_ITLB_SET(n,what)		_XCHAL_ITLB_SET(n, _ ## what )
+#define _XCHAL_ITLB_SET_E(n,i,_what)	XCHAL_ITLB_SET ## n ## _E ## i ## _what
+#define XCHAL_ITLB_SET_E(n,i,what)	_XCHAL_ITLB_SET_E(n,i, _ ## what )
+/*
+ *  Example use:  XCHAL_ITLB_SET(XCHAL_ITLB_ARF_SET0,ENTRIES)
+ *	to get the value of XCHAL_ITLB_SET<n>_ENTRIES where <n> is the first auto-refill set.
+ */
+
+
+/***  Data TLB:  ***/
+
+#define XCHAL_DTLB_WAY_BITS		4	/* number of bits holding the ways */
+#define XCHAL_DTLB_WAYS			10	/* number of ways (n-way set-associative TLB) */
+#define XCHAL_DTLB_ARF_WAYS		4	/* number of auto-refill ways */
+#define XCHAL_DTLB_SETS			5	/* number of sets (groups of ways with identical settings) */
+
+/*  Way set to which each way belongs:  */
+#define XCHAL_DTLB_WAY0_SET		0
+#define XCHAL_DTLB_WAY1_SET		0
+#define XCHAL_DTLB_WAY2_SET		0
+#define XCHAL_DTLB_WAY3_SET		0
+#define XCHAL_DTLB_WAY4_SET		1
+#define XCHAL_DTLB_WAY5_SET		2
+#define XCHAL_DTLB_WAY6_SET		3
+#define XCHAL_DTLB_WAY7_SET		4
+#define XCHAL_DTLB_WAY8_SET		4
+#define XCHAL_DTLB_WAY9_SET		4
+
+/*  Ways sets that are used by hardware auto-refill (ARF):  */
+#define XCHAL_DTLB_ARF_SETS		1	/* number of auto-refill sets */
+#define XCHAL_DTLB_ARF_SET0		0	/* index of n'th auto-refill set */
+
+/*  Way sets that are "min-wired" (see terminology comment above):  */
+#define XCHAL_DTLB_MINWIRED_SETS	1	/* number of "min-wired" sets */
+#define XCHAL_DTLB_MINWIRED_SET0	4	/* index of n'th "min-wired" set */
+
+
+/*  DTLB way set 0 (group of ways 0 thru 3):  */
+#define XCHAL_DTLB_SET0_WAY			0	/* index of first way in this way set */
+#define XCHAL_DTLB_SET0_WAYS			4	/* number of (contiguous) ways in this way set */
+#define XCHAL_DTLB_SET0_ENTRIES_LOG2		2	/* log2(number of entries in this way) */
+#define XCHAL_DTLB_SET0_ENTRIES			4	/* number of entries in this way (always a power of 2) */
+#define XCHAL_DTLB_SET0_ARF			1	/* 1=autorefill by h/w, 0=non-autorefill (wired/constant/static) */
+#define XCHAL_DTLB_SET0_PAGESIZES		1	/* number of supported page sizes in this way */
+#define XCHAL_DTLB_SET0_PAGESZ_BITS		0	/* number of bits to encode the page size */
+#define XCHAL_DTLB_SET0_PAGESZ_LOG2_MIN		12	/* log2(minimum supported page size) */
+#define XCHAL_DTLB_SET0_PAGESZ_LOG2_MAX		12	/* log2(maximum supported page size) */
+#define XCHAL_DTLB_SET0_PAGESZ_LOG2_LIST	12	/* list of log2(page size)s, separated by XCHAL_SEP;
+							   2^PAGESZ_BITS entries in list, unsupported entries are zero */
+#define XCHAL_DTLB_SET0_ASID_CONSTMASK		0	/* constant ASID bits; 0 if all writable */
+#define XCHAL_DTLB_SET0_VPN_CONSTMASK		0	/* constant VPN bits, not including entry index bits; 0 if all writable */
+#define XCHAL_DTLB_SET0_PPN_CONSTMASK		0	/* constant PPN bits, including entry index bits; 0 if all writable */
+#define XCHAL_DTLB_SET0_CA_CONSTMASK		0	/* constant CA bits; 0 if all writable */
+#define XCHAL_DTLB_SET0_ASID_RESET		0	/* 1 if ASID reset values defined (and all writable); 0 otherwise */
+#define XCHAL_DTLB_SET0_VPN_RESET		0	/* 1 if VPN reset values defined (and all writable); 0 otherwise */
+#define XCHAL_DTLB_SET0_PPN_RESET		0	/* 1 if PPN reset values defined (and all writable); 0 otherwise */
+#define XCHAL_DTLB_SET0_CA_RESET		0	/* 1 if CA reset values defined (and all writable); 0 otherwise */
+
+/*  DTLB way set 1 (group of ways 4 thru 4):  */
+#define XCHAL_DTLB_SET1_WAY			4	/* index of first way in this way set */
+#define XCHAL_DTLB_SET1_WAYS			1	/* number of (contiguous) ways in this way set */
+#define XCHAL_DTLB_SET1_ENTRIES_LOG2		2	/* log2(number of entries in this way) */
+#define XCHAL_DTLB_SET1_ENTRIES			4	/* number of entries in this way (always a power of 2) */
+#define XCHAL_DTLB_SET1_ARF			0	/* 1=autorefill by h/w, 0=non-autorefill (wired/constant/static) */
+#define XCHAL_DTLB_SET1_PAGESIZES		4	/* number of supported page sizes in this way */
+#define XCHAL_DTLB_SET1_PAGESZ_BITS		2	/* number of bits to encode the page size */
+#define XCHAL_DTLB_SET1_PAGESZ_LOG2_MIN		20	/* log2(minimum supported page size) */
+#define XCHAL_DTLB_SET1_PAGESZ_LOG2_MAX		26	/* log2(maximum supported page size) */
+#define XCHAL_DTLB_SET1_PAGESZ_LOG2_LIST	20 XCHAL_SEP 22 XCHAL_SEP 24 XCHAL_SEP 26	/* list of log2(page size)s, separated by XCHAL_SEP;
+							   2^PAGESZ_BITS entries in list, unsupported entries are zero */
+#define XCHAL_DTLB_SET1_ASID_CONSTMASK		0	/* constant ASID bits; 0 if all writable */
+#define XCHAL_DTLB_SET1_VPN_CONSTMASK		0	/* constant VPN bits, not including entry index bits; 0 if all writable */
+#define XCHAL_DTLB_SET1_PPN_CONSTMASK		0	/* constant PPN bits, including entry index bits; 0 if all writable */
+#define XCHAL_DTLB_SET1_CA_CONSTMASK		0	/* constant CA bits; 0 if all writable */
+#define XCHAL_DTLB_SET1_ASID_RESET		0	/* 1 if ASID reset values defined (and all writable); 0 otherwise */
+#define XCHAL_DTLB_SET1_VPN_RESET		0	/* 1 if VPN reset values defined (and all writable); 0 otherwise */
+#define XCHAL_DTLB_SET1_PPN_RESET		0	/* 1 if PPN reset values defined (and all writable); 0 otherwise */
+#define XCHAL_DTLB_SET1_CA_RESET		0	/* 1 if CA reset values defined (and all writable); 0 otherwise */
+
+/*  DTLB way set 2 (group of ways 5 thru 5):  */
+#define XCHAL_DTLB_SET2_WAY			5	/* index of first way in this way set */
+#define XCHAL_DTLB_SET2_WAYS			1	/* number of (contiguous) ways in this way set */
+#define XCHAL_DTLB_SET2_ENTRIES_LOG2		1	/* log2(number of entries in this way) */
+#define XCHAL_DTLB_SET2_ENTRIES			2	/* number of entries in this way (always a power of 2) */
+#define XCHAL_DTLB_SET2_ARF			0	/* 1=autorefill by h/w, 0=non-autorefill (wired/constant/static) */
+#define XCHAL_DTLB_SET2_PAGESIZES		1	/* number of supported page sizes in this way */
+#define XCHAL_DTLB_SET2_PAGESZ_BITS		0	/* number of bits to encode the page size */
+#define XCHAL_DTLB_SET2_PAGESZ_LOG2_MIN		27	/* log2(minimum supported page size) */
+#define XCHAL_DTLB_SET2_PAGESZ_LOG2_MAX		27	/* log2(maximum supported page size) */
+#define XCHAL_DTLB_SET2_PAGESZ_LOG2_LIST	27	/* list of log2(page size)s, separated by XCHAL_SEP;
+							   2^PAGESZ_BITS entries in list, unsupported entries are zero */
+#define XCHAL_DTLB_SET2_ASID_CONSTMASK		0xFF	/* constant ASID bits; 0 if all writable */
+#define XCHAL_DTLB_SET2_VPN_CONSTMASK		0xF0000000	/* constant VPN bits, not including entry index bits; 0 if all writable */
+#define XCHAL_DTLB_SET2_PPN_CONSTMASK		0xF8000000	/* constant PPN bits, including entry index bits; 0 if all writable */
+#define XCHAL_DTLB_SET2_CA_CONSTMASK		0x0000000F	/* constant CA bits; 0 if all writable */
+#define XCHAL_DTLB_SET2_ASID_RESET		0	/* 1 if ASID reset values defined (and all writable); 0 otherwise */
+#define XCHAL_DTLB_SET2_VPN_RESET		0	/* 1 if VPN reset values defined (and all writable); 0 otherwise */
+#define XCHAL_DTLB_SET2_PPN_RESET		0	/* 1 if PPN reset values defined (and all writable); 0 otherwise */
+#define XCHAL_DTLB_SET2_CA_RESET		0	/* 1 if CA reset values defined (and all writable); 0 otherwise */
+/*  Constant ASID values for each entry of DTLB way set 2 (because ASID_CONSTMASK is non-zero):  */
+#define XCHAL_DTLB_SET2_E0_ASID_CONST		0x01
+#define XCHAL_DTLB_SET2_E1_ASID_CONST		0x01
+/*  Constant VPN values for each entry of DTLB way set 2 (because VPN_CONSTMASK is non-zero):  */
+#define XCHAL_DTLB_SET2_E0_VPN_CONST		0xD0000000
+#define XCHAL_DTLB_SET2_E1_VPN_CONST		0xD8000000
+/*  Constant PPN values for each entry of DTLB way set 2 (because PPN_CONSTMASK is non-zero):  */
+#define XCHAL_DTLB_SET2_E0_PPN_CONST		0x00000000
+#define XCHAL_DTLB_SET2_E1_PPN_CONST		0x00000000
+/*  Constant CA values for each entry of DTLB way set 2 (because CA_CONSTMASK is non-zero):  */
+#define XCHAL_DTLB_SET2_E0_CA_CONST		0x07
+#define XCHAL_DTLB_SET2_E1_CA_CONST		0x03
+
+/*  DTLB way set 3 (group of ways 6 thru 6):  */
+#define XCHAL_DTLB_SET3_WAY			6	/* index of first way in this way set */
+#define XCHAL_DTLB_SET3_WAYS			1	/* number of (contiguous) ways in this way set */
+#define XCHAL_DTLB_SET3_ENTRIES_LOG2		1	/* log2(number of entries in this way) */
+#define XCHAL_DTLB_SET3_ENTRIES			2	/* number of entries in this way (always a power of 2) */
+#define XCHAL_DTLB_SET3_ARF			0	/* 1=autorefill by h/w, 0=non-autorefill (wired/constant/static) */
+#define XCHAL_DTLB_SET3_PAGESIZES		1	/* number of supported page sizes in this way */
+#define XCHAL_DTLB_SET3_PAGESZ_BITS		0	/* number of bits to encode the page size */
+#define XCHAL_DTLB_SET3_PAGESZ_LOG2_MIN		28	/* log2(minimum supported page size) */
+#define XCHAL_DTLB_SET3_PAGESZ_LOG2_MAX		28	/* log2(maximum supported page size) */
+#define XCHAL_DTLB_SET3_PAGESZ_LOG2_LIST	28	/* list of log2(page size)s, separated by XCHAL_SEP;
+							   2^PAGESZ_BITS entries in list, unsupported entries are zero */
+#define XCHAL_DTLB_SET3_ASID_CONSTMASK		0xFF	/* constant ASID bits; 0 if all writable */
+#define XCHAL_DTLB_SET3_VPN_CONSTMASK		0xE0000000	/* constant VPN bits, not including entry index bits; 0 if all writable */
+#define XCHAL_DTLB_SET3_PPN_CONSTMASK		0xF0000000	/* constant PPN bits, including entry index bits; 0 if all writable */
+#define XCHAL_DTLB_SET3_CA_CONSTMASK		0x0000000F	/* constant CA bits; 0 if all writable */
+#define XCHAL_DTLB_SET3_ASID_RESET		0	/* 1 if ASID reset values defined (and all writable); 0 otherwise */
+#define XCHAL_DTLB_SET3_VPN_RESET		0	/* 1 if VPN reset values defined (and all writable); 0 otherwise */
+#define XCHAL_DTLB_SET3_PPN_RESET		0	/* 1 if PPN reset values defined (and all writable); 0 otherwise */
+#define XCHAL_DTLB_SET3_CA_RESET		0	/* 1 if CA reset values defined (and all writable); 0 otherwise */
+/*  Constant ASID values for each entry of DTLB way set 3 (because ASID_CONSTMASK is non-zero):  */
+#define XCHAL_DTLB_SET3_E0_ASID_CONST		0x01
+#define XCHAL_DTLB_SET3_E1_ASID_CONST		0x01
+/*  Constant VPN values for each entry of DTLB way set 3 (because VPN_CONSTMASK is non-zero):  */
+#define XCHAL_DTLB_SET3_E0_VPN_CONST		0xE0000000
+#define XCHAL_DTLB_SET3_E1_VPN_CONST		0xF0000000
+/*  Constant PPN values for each entry of DTLB way set 3 (because PPN_CONSTMASK is non-zero):  */
+#define XCHAL_DTLB_SET3_E0_PPN_CONST		0xF0000000
+#define XCHAL_DTLB_SET3_E1_PPN_CONST		0xF0000000
+/*  Constant CA values for each entry of DTLB way set 3 (because CA_CONSTMASK is non-zero):  */
+#define XCHAL_DTLB_SET3_E0_CA_CONST		0x07
+#define XCHAL_DTLB_SET3_E1_CA_CONST		0x03
+
+/*  DTLB way set 4 (group of ways 7 thru 9):  */
+#define XCHAL_DTLB_SET4_WAY			7	/* index of first way in this way set */
+#define XCHAL_DTLB_SET4_WAYS			3	/* number of (contiguous) ways in this way set */
+#define XCHAL_DTLB_SET4_ENTRIES_LOG2		0	/* log2(number of entries in this way) */
+#define XCHAL_DTLB_SET4_ENTRIES			1	/* number of entries in this way (always a power of 2) */
+#define XCHAL_DTLB_SET4_ARF			0	/* 1=autorefill by h/w, 0=non-autorefill (wired/constant/static) */
+#define XCHAL_DTLB_SET4_PAGESIZES		1	/* number of supported page sizes in this way */
+#define XCHAL_DTLB_SET4_PAGESZ_BITS		0	/* number of bits to encode the page size */
+#define XCHAL_DTLB_SET4_PAGESZ_LOG2_MIN		12	/* log2(minimum supported page size) */
+#define XCHAL_DTLB_SET4_PAGESZ_LOG2_MAX		12	/* log2(maximum supported page size) */
+#define XCHAL_DTLB_SET4_PAGESZ_LOG2_LIST	12	/* list of log2(page size)s, separated by XCHAL_SEP;
+							   2^PAGESZ_BITS entries in list, unsupported entries are zero */
+#define XCHAL_DTLB_SET4_ASID_CONSTMASK		0	/* constant ASID bits; 0 if all writable */
+#define XCHAL_DTLB_SET4_VPN_CONSTMASK		0	/* constant VPN bits, not including entry index bits; 0 if all writable */
+#define XCHAL_DTLB_SET4_PPN_CONSTMASK		0	/* constant PPN bits, including entry index bits; 0 if all writable */
+#define XCHAL_DTLB_SET4_CA_CONSTMASK		0	/* constant CA bits; 0 if all writable */
+#define XCHAL_DTLB_SET4_ASID_RESET		0	/* 1 if ASID reset values defined (and all writable); 0 otherwise */
+#define XCHAL_DTLB_SET4_VPN_RESET		0	/* 1 if VPN reset values defined (and all writable); 0 otherwise */
+#define XCHAL_DTLB_SET4_PPN_RESET		0	/* 1 if PPN reset values defined (and all writable); 0 otherwise */
+#define XCHAL_DTLB_SET4_CA_RESET		0	/* 1 if CA reset values defined (and all writable); 0 otherwise */
+
+/*  Indexing macros:  */
+#define _XCHAL_DTLB_SET(n,_what)	XCHAL_DTLB_SET ## n ## _what
+#define XCHAL_DTLB_SET(n,what)		_XCHAL_DTLB_SET(n, _ ## what )
+#define _XCHAL_DTLB_SET_E(n,i,_what)	XCHAL_DTLB_SET ## n ## _E ## i ## _what
+#define XCHAL_DTLB_SET_E(n,i,what)	_XCHAL_DTLB_SET_E(n,i, _ ## what )
+/*
+ *  Example use:  XCHAL_DTLB_SET(XCHAL_DTLB_ARF_SET0,ENTRIES)
+ *	to get the value of XCHAL_DTLB_SET<n>_ENTRIES where <n> is the first auto-refill set.
+ */
+
+
+/*
+ *  Determine whether we have a full MMU (with Page Table and Protection)
+ *  usable for an MMU-based OS:
+ */
+#if XCHAL_HAVE_TLBS && !XCHAL_HAVE_SPANNING_WAY && XCHAL_ITLB_ARF_WAYS > 0 && XCHAL_DTLB_ARF_WAYS > 0 && XCHAL_MMU_RINGS >= 2
+# define XCHAL_HAVE_PTP_MMU		1	/* have full MMU (with page table [autorefill] and protection) */
+#else
+# define XCHAL_HAVE_PTP_MMU		0	/* don't have full MMU */
+#endif
+
+/*
+ *  For full MMUs, report kernel RAM segment and kernel I/O segment static page mappings:
+ */
+#if XCHAL_HAVE_PTP_MMU
+#define XCHAL_KSEG_CACHED_VADDR		0xD0000000	/* virt.addr of kernel RAM cached static map */
+#define XCHAL_KSEG_CACHED_PADDR		0x00000000	/* phys.addr of kseg_cached */
+#define XCHAL_KSEG_CACHED_SIZE		0x08000000	/* size in bytes of kseg_cached (assumed power of 2!!!) */
+#define XCHAL_KSEG_BYPASS_VADDR		0xD8000000	/* virt.addr of kernel RAM bypass (uncached) static map */
+#define XCHAL_KSEG_BYPASS_PADDR		0x00000000	/* phys.addr of kseg_bypass */
+#define XCHAL_KSEG_BYPASS_SIZE		0x08000000	/* size in bytes of kseg_bypass (assumed power of 2!!!) */
+
+#define XCHAL_KIO_CACHED_VADDR		0xE0000000	/* virt.addr of kernel I/O cached static map */
+#define XCHAL_KIO_CACHED_PADDR		0xF0000000	/* phys.addr of kio_cached */
+#define XCHAL_KIO_CACHED_SIZE		0x10000000	/* size in bytes of kio_cached (assumed power of 2!!!) */
+#define XCHAL_KIO_BYPASS_VADDR		0xF0000000	/* virt.addr of kernel I/O bypass (uncached) static map */
+#define XCHAL_KIO_BYPASS_PADDR		0xF0000000	/* phys.addr of kio_bypass */
+#define XCHAL_KIO_BYPASS_SIZE		0x10000000	/* size in bytes of kio_bypass (assumed power of 2!!!) */
+
+#define XCHAL_SEG_MAPPABLE_VADDR	0x00000000	/* start of largest non-static-mapped virtual addr area */
+#define XCHAL_SEG_MAPPABLE_SIZE		0xD0000000	/* size in bytes of  "  */
+/* define XCHAL_SEG_MAPPABLE2_xxx if more areas present, sorted in order of descending size.  */
+#endif
+
+
+/*----------------------------------------------------------------------
+				MISC
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_NUM_WRITEBUFFER_ENTRIES	4	/* number of write buffer entries */
+
+#define XCHAL_CORE_ID			"linux_be"	/* configuration's alphanumeric core identifier
+							   (CoreID) set in the Xtensa Processor Generator */
+
+#define XCHAL_BUILD_UNIQUE_ID		0x00003256	/* software build-unique ID (22-bit) */
+
+/*  These definitions describe the hardware targeted by this software:  */
+#define XCHAL_HW_CONFIGID0		0xC103D1FF	/* config ID reg 0 value (upper 32 of 64 bits) */
+#define XCHAL_HW_CONFIGID1		0x00803256	/* config ID reg 1 value (lower 32 of 64 bits) */
+#define XCHAL_CONFIGID0			XCHAL_HW_CONFIGID0	/* for backward compatibility only -- don't use! */
+#define XCHAL_CONFIGID1			XCHAL_HW_CONFIGID1	/* for backward compatibility only -- don't use! */
+#define XCHAL_HW_RELEASE_MAJOR		1050	/* major release of targeted hardware */
+#define XCHAL_HW_RELEASE_MINOR		1	/* minor release of targeted hardware */
+#define XCHAL_HW_RELEASE_NAME		"T1050.1"	/* full release name of targeted hardware */
+#define XTHAL_HW_REL_T1050	1
+#define XTHAL_HW_REL_T1050_1	1
+#define XCHAL_HW_CONFIGID_RELIABLE	1
+
+
+/*
+ *  Miscellaneous special register fields:
+ */
+
+
+/*  DBREAKC (special register number 160):  */
+#define XCHAL_DBREAKC_VALIDMASK	0xC000003F	/* bits of DBREAKC that are defined */
+/*  MASK field:  */
+#define XCHAL_DBREAKC_MASK_BITS 	6		/* number of bits in MASK field */
+#define XCHAL_DBREAKC_MASK_NUM  	64		/* max number of possible causes (2^bits) */
+#define XCHAL_DBREAKC_MASK_SHIFT	0		/* position of MASK bits in DBREAKC, starting from lsbit */
+#define XCHAL_DBREAKC_MASK_MASK 	0x0000003F	/* mask of bits in MASK field of DBREAKC */
+/*  LOADBREAK field:  */
+#define XCHAL_DBREAKC_LOADBREAK_BITS 	1		/* number of bits in LOADBREAK field */
+#define XCHAL_DBREAKC_LOADBREAK_NUM  	2		/* max number of possible causes (2^bits) */
+#define XCHAL_DBREAKC_LOADBREAK_SHIFT	30		/* position of LOADBREAK bits in DBREAKC, starting from lsbit */
+#define XCHAL_DBREAKC_LOADBREAK_MASK 	0x40000000	/* mask of bits in LOADBREAK field of DBREAKC */
+/*  STOREBREAK field:  */
+#define XCHAL_DBREAKC_STOREBREAK_BITS 	1		/* number of bits in STOREBREAK field */
+#define XCHAL_DBREAKC_STOREBREAK_NUM  	2		/* max number of possible causes (2^bits) */
+#define XCHAL_DBREAKC_STOREBREAK_SHIFT	31		/* position of STOREBREAK bits in DBREAKC, starting from lsbit */
+#define XCHAL_DBREAKC_STOREBREAK_MASK 	0x80000000	/* mask of bits in STOREBREAK field of DBREAKC */
+
+/*  PS (special register number 230):  */
+#define XCHAL_PS_VALIDMASK	0x00070FFF	/* bits of PS that are defined */
+/*  INTLEVEL field:  */
+#define XCHAL_PS_INTLEVEL_BITS 	4		/* number of bits in INTLEVEL field */
+#define XCHAL_PS_INTLEVEL_NUM  	16		/* max number of possible causes (2^bits) */
+#define XCHAL_PS_INTLEVEL_SHIFT	0		/* position of INTLEVEL bits in PS, starting from lsbit */
+#define XCHAL_PS_INTLEVEL_MASK 	0x0000000F	/* mask of bits in INTLEVEL field of PS */
+/*  EXCM field:  */
+#define XCHAL_PS_EXCM_BITS 	1		/* number of bits in EXCM field */
+#define XCHAL_PS_EXCM_NUM  	2		/* max number of possible causes (2^bits) */
+#define XCHAL_PS_EXCM_SHIFT	4		/* position of EXCM bits in PS, starting from lsbit */
+#define XCHAL_PS_EXCM_MASK 	0x00000010	/* mask of bits in EXCM field of PS */
+/*  PROGSTACK field:  */
+#define XCHAL_PS_PROGSTACK_BITS 	1		/* number of bits in PROGSTACK field */
+#define XCHAL_PS_PROGSTACK_NUM  	2		/* max number of possible causes (2^bits) */
+#define XCHAL_PS_PROGSTACK_SHIFT	5		/* position of PROGSTACK bits in PS, starting from lsbit */
+#define XCHAL_PS_PROGSTACK_MASK 	0x00000020	/* mask of bits in PROGSTACK field of PS */
+/*  RING field:  */
+#define XCHAL_PS_RING_BITS 	2		/* number of bits in RING field */
+#define XCHAL_PS_RING_NUM  	4		/* max number of possible causes (2^bits) */
+#define XCHAL_PS_RING_SHIFT	6		/* position of RING bits in PS, starting from lsbit */
+#define XCHAL_PS_RING_MASK 	0x000000C0	/* mask of bits in RING field of PS */
+/*  OWB field:  */
+#define XCHAL_PS_OWB_BITS 	4		/* number of bits in OWB field */
+#define XCHAL_PS_OWB_NUM  	16		/* max number of possible causes (2^bits) */
+#define XCHAL_PS_OWB_SHIFT	8		/* position of OWB bits in PS, starting from lsbit */
+#define XCHAL_PS_OWB_MASK 	0x00000F00	/* mask of bits in OWB field of PS */
+/*  CALLINC field:  */
+#define XCHAL_PS_CALLINC_BITS 	2		/* number of bits in CALLINC field */
+#define XCHAL_PS_CALLINC_NUM  	4		/* max number of possible causes (2^bits) */
+#define XCHAL_PS_CALLINC_SHIFT	16		/* position of CALLINC bits in PS, starting from lsbit */
+#define XCHAL_PS_CALLINC_MASK 	0x00030000	/* mask of bits in CALLINC field of PS */
+/*  WOE field:  */
+#define XCHAL_PS_WOE_BITS 	1		/* number of bits in WOE field */
+#define XCHAL_PS_WOE_NUM  	2		/* max number of possible causes (2^bits) */
+#define XCHAL_PS_WOE_SHIFT	18		/* position of WOE bits in PS, starting from lsbit */
+#define XCHAL_PS_WOE_MASK 	0x00040000	/* mask of bits in WOE field of PS */
+
+/*  EXCCAUSE (special register number 232):  */
+#define XCHAL_EXCCAUSE_VALIDMASK	0x0000003F	/* bits of EXCCAUSE that are defined */
+/*  EXCCAUSE field:  */
+#define XCHAL_EXCCAUSE_BITS 		6		/* number of bits in EXCCAUSE register */
+#define XCHAL_EXCCAUSE_NUM  		64		/* max number of possible causes (2^bits) */
+#define XCHAL_EXCCAUSE_SHIFT		0		/* position of EXCCAUSE bits in register, starting from lsbit */
+#define XCHAL_EXCCAUSE_MASK 		0x0000003F	/* mask of bits in EXCCAUSE register */
+
+/*  DEBUGCAUSE (special register number 233):  */
+#define XCHAL_DEBUGCAUSE_VALIDMASK	0x0000003F	/* bits of DEBUGCAUSE that are defined */
+/*  ICOUNT field:  */
+#define XCHAL_DEBUGCAUSE_ICOUNT_BITS 	1		/* number of bits in ICOUNT field */
+#define XCHAL_DEBUGCAUSE_ICOUNT_NUM  	2		/* max number of possible causes (2^bits) */
+#define XCHAL_DEBUGCAUSE_ICOUNT_SHIFT	0		/* position of ICOUNT bits in DEBUGCAUSE, starting from lsbit */
+#define XCHAL_DEBUGCAUSE_ICOUNT_MASK 	0x00000001	/* mask of bits in ICOUNT field of DEBUGCAUSE */
+/*  IBREAK field:  */
+#define XCHAL_DEBUGCAUSE_IBREAK_BITS 	1		/* number of bits in IBREAK field */
+#define XCHAL_DEBUGCAUSE_IBREAK_NUM  	2		/* max number of possible causes (2^bits) */
+#define XCHAL_DEBUGCAUSE_IBREAK_SHIFT	1		/* position of IBREAK bits in DEBUGCAUSE, starting from lsbit */
+#define XCHAL_DEBUGCAUSE_IBREAK_MASK 	0x00000002	/* mask of bits in IBREAK field of DEBUGCAUSE */
+/*  DBREAK field:  */
+#define XCHAL_DEBUGCAUSE_DBREAK_BITS 	1		/* number of bits in DBREAK field */
+#define XCHAL_DEBUGCAUSE_DBREAK_NUM  	2		/* max number of possible causes (2^bits) */
+#define XCHAL_DEBUGCAUSE_DBREAK_SHIFT	2		/* position of DBREAK bits in DEBUGCAUSE, starting from lsbit */
+#define XCHAL_DEBUGCAUSE_DBREAK_MASK 	0x00000004	/* mask of bits in DBREAK field of DEBUGCAUSE */
+/*  BREAK field:  */
+#define XCHAL_DEBUGCAUSE_BREAK_BITS 	1		/* number of bits in BREAK field */
+#define XCHAL_DEBUGCAUSE_BREAK_NUM  	2		/* max number of possible causes (2^bits) */
+#define XCHAL_DEBUGCAUSE_BREAK_SHIFT	3		/* position of BREAK bits in DEBUGCAUSE, starting from lsbit */
+#define XCHAL_DEBUGCAUSE_BREAK_MASK 	0x00000008	/* mask of bits in BREAK field of DEBUGCAUSE */
+/*  BREAKN field:  */
+#define XCHAL_DEBUGCAUSE_BREAKN_BITS 	1		/* number of bits in BREAKN field */
+#define XCHAL_DEBUGCAUSE_BREAKN_NUM  	2		/* max number of possible causes (2^bits) */
+#define XCHAL_DEBUGCAUSE_BREAKN_SHIFT	4		/* position of BREAKN bits in DEBUGCAUSE, starting from lsbit */
+#define XCHAL_DEBUGCAUSE_BREAKN_MASK 	0x00000010	/* mask of bits in BREAKN field of DEBUGCAUSE */
+/*  DEBUGINT field:  */
+#define XCHAL_DEBUGCAUSE_DEBUGINT_BITS 	1		/* number of bits in DEBUGINT field */
+#define XCHAL_DEBUGCAUSE_DEBUGINT_NUM  	2		/* max number of possible causes (2^bits) */
+#define XCHAL_DEBUGCAUSE_DEBUGINT_SHIFT	5		/* position of DEBUGINT bits in DEBUGCAUSE, starting from lsbit */
+#define XCHAL_DEBUGCAUSE_DEBUGINT_MASK 	0x00000020	/* mask of bits in DEBUGINT field of DEBUGCAUSE */
+
+
+
+/*----------------------------------------------------------------------
+				ISA
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_DENSITY		1	/* 1 if density option configured, 0 otherwise */
+#define XCHAL_HAVE_LOOPS		1	/* 1 if zero-overhead loops option configured, 0 otherwise */
+/*  Misc instructions:  */
+#define XCHAL_HAVE_NSA			0	/* 1 if NSA/NSAU instructions option configured, 0 otherwise */
+#define XCHAL_HAVE_MINMAX		0	/* 1 if MIN/MAX instructions option configured, 0 otherwise */
+#define XCHAL_HAVE_SEXT			0	/* 1 if sign-extend instruction option configured, 0 otherwise */
+#define XCHAL_HAVE_CLAMPS		0	/* 1 if CLAMPS instruction option configured, 0 otherwise */
+#define XCHAL_HAVE_MAC16		0	/* 1 if MAC16 option configured, 0 otherwise */
+#define XCHAL_HAVE_MUL16		0	/* 1 if 16-bit integer multiply option configured, 0 otherwise */
+/*#define XCHAL_HAVE_POPC		0*/	/* 1 if CRC instruction option configured, 0 otherwise */
+/*#define XCHAL_HAVE_CRC		0*/	/* 1 if POPC instruction option configured, 0 otherwise */
+
+#define XCHAL_HAVE_SPECULATION		0	/* 1 if speculation option configured, 0 otherwise */
+/*#define XCHAL_HAVE_MP_SYNC		0*/	/* 1 if multiprocessor sync. option configured, 0 otherwise */
+#define XCHAL_HAVE_PRID			0	/* 1 if processor ID register configured, 0 otherwise */
+
+#define XCHAL_NUM_MISC_REGS		2	/* number of miscellaneous registers (0..4) */
+
+/*  These relate a bit more to TIE:  */
+#define XCHAL_HAVE_BOOLEANS		0	/* 1 if booleans option configured, 0 otherwise */
+#define XCHAL_HAVE_MUL32		0	/* 1 if 32-bit integer multiply option configured, 0 otherwise */
+#define XCHAL_HAVE_MUL32_HIGH		0	/* 1 if MUL32 option includes MULUH and MULSH, 0 otherwise */
+#define XCHAL_HAVE_FP			0	/* 1 if floating point option configured, 0 otherwise */
+
+
+/*----------------------------------------------------------------------
+				DERIVED
+  ----------------------------------------------------------------------*/
+
+#if XCHAL_HAVE_BE
+#define XCHAL_INST_ILLN			0xD60F		/* 2-byte illegal instruction, msb-first */
+#define XCHAL_INST_ILLN_BYTE0		0xD6		/* 2-byte illegal instruction, 1st byte */
+#define XCHAL_INST_ILLN_BYTE1		0x0F		/* 2-byte illegal instruction, 2nd byte */
+#else
+#define XCHAL_INST_ILLN			0xF06D		/* 2-byte illegal instruction, lsb-first */
+#define XCHAL_INST_ILLN_BYTE0		0x6D		/* 2-byte illegal instruction, 1st byte */
+#define XCHAL_INST_ILLN_BYTE1		0xF0		/* 2-byte illegal instruction, 2nd byte */
+#endif
+/*  Belongs in xtensa/hal.h:  */
+#define XTHAL_INST_ILL			0x000000	/* 3-byte illegal instruction */
+
+
+/*
+ *  Because information as to exactly which hardware release is targeted
+ *  by a given software build is not always available, compile-time HAL
+ *  Hardware-Release "_AT" macros are fuzzy (return 0, 1, or XCHAL_MAYBE):
+ */
+#ifndef XCHAL_HW_RELEASE_MAJOR
+# define XCHAL_HW_CONFIGID_RELIABLE	0
+#endif
+#if XCHAL_HW_CONFIGID_RELIABLE
+# define XCHAL_HW_RELEASE_AT_OR_BELOW(major,minor)	(XTHAL_REL_LE( XCHAL_HW_RELEASE_MAJOR,XCHAL_HW_RELEASE_MINOR, major,minor ) ? 1 : 0)
+# define XCHAL_HW_RELEASE_AT_OR_ABOVE(major,minor)	(XTHAL_REL_GE( XCHAL_HW_RELEASE_MAJOR,XCHAL_HW_RELEASE_MINOR, major,minor ) ? 1 : 0)
+# define XCHAL_HW_RELEASE_AT(major,minor)		(XTHAL_REL_EQ( XCHAL_HW_RELEASE_MAJOR,XCHAL_HW_RELEASE_MINOR, major,minor ) ? 1 : 0)
+# define XCHAL_HW_RELEASE_MAJOR_AT(major)		((XCHAL_HW_RELEASE_MAJOR == (major)) ? 1 : 0)
+#else
+# define XCHAL_HW_RELEASE_AT_OR_BELOW(major,minor)	( ((major) < 1040 && XCHAL_HAVE_XEA2) ? 0 \
+							: ((major) > 1050 && XCHAL_HAVE_XEA1) ? 1 \
+							: XTHAL_MAYBE )
+# define XCHAL_HW_RELEASE_AT_OR_ABOVE(major,minor)	( ((major) >= 2000 && XCHAL_HAVE_XEA1) ? 0 \
+							: (XTHAL_REL_LE(major,minor, 1040,0) && XCHAL_HAVE_XEA2) ? 1 \
+							: XTHAL_MAYBE )
+# define XCHAL_HW_RELEASE_AT(major,minor)		( (((major) < 1040 && XCHAL_HAVE_XEA2) || \
+							   ((major) >= 2000 && XCHAL_HAVE_XEA1)) ? 0 : XTHAL_MAYBE)
+# define XCHAL_HW_RELEASE_MAJOR_AT(major)		XCHAL_HW_RELEASE_AT(major,0)
+#endif
+
+/*
+ *  Specific errata:
+ */
+
+/*
+ *  Erratum T1020.H13, T1030.H7, T1040.H10, T1050.H4 (fixed in T1040.3 and T1050.1;
+ *  relevant only in XEA1, kernel-vector mode, level-one interrupts and overflows enabled):
+ */
+#define XCHAL_MAYHAVE_ERRATUM_XEA1KWIN	(XCHAL_HAVE_XEA1 && \
+					 (XCHAL_HW_RELEASE_AT_OR_BELOW(1040,2) != 0 \
+					  || XCHAL_HW_RELEASE_AT(1050,0)))
+
+
+
+#endif /*XTENSA_CONFIG_CORE_H*/
+

include/asm-xtensa/xtensa/config-linux_be/defs.h

···
+/* Definitions for Xtensa instructions, types, and protos. */
+
+/*
+ * Copyright (c) 2003 Tensilica, Inc.  All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2.1 of the GNU Lesser General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like.  Any license provided herein, whether implied or
+ * otherwise, applies only to this software file.  Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, write the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307,
+ * USA.
+ */
+
+/* Do not modify. This is automatically generated.*/
+
+#ifndef _XTENSA_BASE_HEADER
+#define _XTENSA_BASE_HEADER
+
+#ifdef __XTENSA__
+#if defined(__GNUC__) && !defined(__XCC__)
+
+#define L8UI_ASM(arr, ars, imm) { \
+  __asm__ volatile("l8ui %0, %1, %2" : "=a" (arr) : "a" (ars) , "i" (imm)); \
+}
+
+#define XT_L8UI(ars, imm) \
+({ \
+  unsigned char _arr; \
+  const unsigned char *_ars = ars; \
+  L8UI_ASM(_arr, _ars, imm); \
+  _arr; \
+})
+
+#define L16UI_ASM(arr, ars, imm) { \
+  __asm__ volatile("l16ui %0, %1, %2" : "=a" (arr) : "a" (ars) , "i" (imm)); \
+}
+
+#define XT_L16UI(ars, imm) \
+({ \
+  unsigned short _arr; \
+  const unsigned short *_ars = ars; \
+  L16UI_ASM(_arr, _ars, imm); \
+  _arr; \
+})
+
+#define L16SI_ASM(arr, ars, imm) {\
+  __asm__ volatile("l16si %0, %1, %2" : "=a" (arr) : "a" (ars) , "i" (imm)); \
+}
+
+#define XT_L16SI(ars, imm) \
+({ \
+  signed short _arr; \
+  const signed short *_ars = ars; \
+  L16SI_ASM(_arr, _ars, imm); \
+  _arr; \
+})
+
+#define L32I_ASM(arr, ars, imm) { \
+  __asm__ volatile("l32i %0, %1, %2" : "=a" (arr) : "a" (ars) , "i" (imm)); \
+}
+
+#define XT_L32I(ars, imm) \
+({ \
+  unsigned _arr; \
+  const unsigned *_ars = ars; \
+  L32I_ASM(_arr, _ars, imm); \
+  _arr; \
+})
+
+#define S8I_ASM(arr, ars, imm) {\
+  __asm__ volatile("s8i %0, %1, %2" : : "a" (arr), "a" (ars) , "i" (imm) : "memory" ); \
+}
+
+#define XT_S8I(arr, ars, imm) \
+({ \
+  signed char _arr = arr; \
+  const signed char *_ars = ars; \
+  S8I_ASM(_arr, _ars, imm); \
+})
+
+#define S16I_ASM(arr, ars, imm) {\
+  __asm__ volatile("s16i %0, %1, %2" : : "a" (arr), "a" (ars) , "i" (imm) : "memory" ); \
+}
+
+#define XT_S16I(arr, ars, imm) \
+({ \
+  signed short _arr = arr; \
+  const signed short *_ars = ars; \
+  S16I_ASM(_arr, _ars, imm); \
+})
+
+#define S32I_ASM(arr, ars, imm) { \
+  __asm__ volatile("s32i %0, %1, %2" : : "a" (arr), "a" (ars) , "i" (imm) : "memory" ); \
+}
+
+#define XT_S32I(arr, ars, imm) \
+({ \
+  signed int _arr = arr; \
+  const signed int *_ars = ars; \
+  S32I_ASM(_arr, _ars, imm); \
+})
+
+#define ADDI_ASM(art, ars, imm) {\
+   __asm__ ("addi %0, %1, %2" : "=a" (art) : "a" (ars), "i" (imm)); \
+}
+
+#define XT_ADDI(ars, imm) \
+({ \
+   unsigned _art; \
+   unsigned _ars = ars; \
+   ADDI_ASM(_art, _ars, imm); \
+   _art; \
+})
+
+#define ABS_ASM(arr, art) {\
+   __asm__ ("abs %0, %1" : "=a" (arr) : "a" (art)); \
+}
+
+#define XT_ABS(art) \
+({ \
+   unsigned _arr; \
+   signed _art = art; \
+   ABS_ASM(_arr, _art); \
+   _arr; \
+})
+
+/* Note: In the following macros that reference SAR, the magic "state"
+   register is used to capture the dependency on SAR.  This is because
+   SAR is a 5-bit register and thus there are no C types that can be
+   used to represent it.  It doesn't appear that the SAR register is
+   even relevant to GCC, but it is marked as "clobbered" just in
+   case.  */
+
+#define SRC_ASM(arr, ars, art) {\
+   register int _xt_sar __asm__ ("state"); \
+   __asm__ ("src %0, %1, %2" \
+	    : "=a" (arr) : "a" (ars), "a" (art), "t" (_xt_sar)); \
+}
+
+#define XT_SRC(ars, art) \
+({ \
+   unsigned _arr; \
+   unsigned _ars = ars; \
+   unsigned _art = art; \
+   SRC_ASM(_arr, _ars, _art); \
+   _arr; \
+})
+
+#define SSR_ASM(ars) {\
+   register int _xt_sar __asm__ ("state"); \
+   __asm__ ("ssr %1" : "=t" (_xt_sar) : "a" (ars) : "sar"); \
+}
+
+#define XT_SSR(ars) \
+({ \
+   unsigned _ars = ars; \
+   SSR_ASM(_ars); \
+})
+
+#define SSL_ASM(ars) {\
+   register int _xt_sar __asm__ ("state"); \
+   __asm__ ("ssl %1" : "=t" (_xt_sar) : "a" (ars) : "sar"); \
+}
+
+#define XT_SSL(ars) \
+({ \
+   unsigned _ars = ars; \
+   SSL_ASM(_ars); \
+})
+
+#define SSA8B_ASM(ars) {\
+   register int _xt_sar __asm__ ("state"); \
+   __asm__ ("ssa8b %1" : "=t" (_xt_sar) : "a" (ars) : "sar"); \
+}
+
+#define XT_SSA8B(ars) \
+({ \
+   unsigned _ars = ars; \
+   SSA8B_ASM(_ars); \
+})
+
+#define SSA8L_ASM(ars) {\
+   register int _xt_sar __asm__ ("state"); \
+   __asm__ ("ssa8l %1" : "=t" (_xt_sar) : "a" (ars) : "sar"); \
+}
+
+#define XT_SSA8L(ars) \
+({ \
+   unsigned _ars = ars; \
+   SSA8L_ASM(_ars); \
+})
+
+#define SSAI_ASM(imm) {\
+   register int _xt_sar __asm__ ("state"); \
+   __asm__ ("ssai %1" : "=t" (_xt_sar) : "i" (imm) : "sar"); \
+}
+
+#define XT_SSAI(imm) \
+({ \
+   SSAI_ASM(imm); \
+})
+
+
+
+
+
+
+
+
+#endif /* __GNUC__ && !__XCC__ */
+
+#ifdef __XCC__
+
+/* Core load/store instructions */
+extern unsigned char _TIE_L8UI(const unsigned char * ars, immediate imm);
+extern unsigned short _TIE_L16UI(const unsigned short * ars, immediate imm);
+extern signed short _TIE_L16SI(const signed short * ars, immediate imm);
+extern unsigned _TIE_L32I(const unsigned * ars, immediate imm);
+extern void _TIE_S8I(unsigned char arr, unsigned char * ars, immediate imm);
+extern void _TIE_S16I(unsigned short arr, unsigned short * ars, immediate imm);
+extern void _TIE_S32I(unsigned arr, unsigned * ars, immediate imm);
+
+#define XT_L8UI  _TIE_L8UI
+#define XT_L16UI _TIE_L16UI
+#define XT_L16SI _TIE_L16SI
+#define XT_L32I  _TIE_L32I
+#define XT_S8I   _TIE_S8I
+#define XT_S16I  _TIE_S16I
+#define XT_S32I  _TIE_S32I
+
+/* Add-immediate instruction */
+extern unsigned _TIE_ADDI(unsigned ars, immediate imm);
+#define XT_ADDI  _TIE_ADDI
+
+/* Absolute value instruction */
+extern unsigned _TIE_ABS(int art);
+#define XT_ABS _TIE_ABS
+
+/* funnel shift instructions */
+extern unsigned _TIE_SRC(unsigned ars, unsigned art);
+#define XT_SRC _TIE_SRC
+extern void _TIE_SSR(unsigned ars);
+#define XT_SSR _TIE_SSR
+extern void _TIE_SSL(unsigned ars);
+#define XT_SSL _TIE_SSL
+extern void _TIE_SSA8B(unsigned ars);
+#define XT_SSA8B _TIE_SSA8B
+extern void _TIE_SSA8L(unsigned ars);
+#define XT_SSA8L _TIE_SSA8L
+extern void _TIE_SSAI(immediate imm);
+#define XT_SSAI _TIE_SSAI
+
+
+#endif /* __XCC__ */
+
+#endif /* __XTENSA__ */
+#endif /* !_XTENSA_BASE_HEADER */

include/asm-xtensa/xtensa/config-linux_be/specreg.h

···
+/*
+ * Xtensa Special Register symbolic names
+ */
+
+/* $Id: specreg.h,v 1.2 2003/03/07 19:15:18 joetaylor Exp $ */
+
+/*
+ * Copyright (c) 2003 Tensilica, Inc.  All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2.1 of the GNU Lesser General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like.  Any license provided herein, whether implied or
+ * otherwise, applies only to this software file.  Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, write the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307,
+ * USA.
+ */
+
+#ifndef XTENSA_SPECREG_H
+#define XTENSA_SPECREG_H
+
+/*  Include these special register bitfield definitions, for historical reasons:  */
+#include <xtensa/corebits.h>
+
+
+/*  Special registers:  */
+#define LBEG		0
+#define LEND		1
+#define LCOUNT		2
+#define SAR		3
+#define WINDOWBASE	72
+#define WINDOWSTART	73
+#define PTEVADDR	83
+#define RASID		90
+#define ITLBCFG		91
+#define DTLBCFG		92
+#define IBREAKENABLE	96
+#define DDR		104
+#define IBREAKA_0	128
+#define IBREAKA_1	129
+#define DBREAKA_0	144
+#define DBREAKA_1	145
+#define DBREAKC_0	160
+#define DBREAKC_1	161
+#define EPC_1		177
+#define EPC_2		178
+#define EPC_3		179
+#define EPC_4		180
+#define DEPC		192
+#define EPS_2		194
+#define EPS_3		195
+#define EPS_4		196
+#define EXCSAVE_1	209
+#define EXCSAVE_2	210
+#define EXCSAVE_3	211
+#define EXCSAVE_4	212
+#define INTERRUPT	226
+#define INTENABLE	228
+#define PS		230
+#define EXCCAUSE	232
+#define DEBUGCAUSE	233
+#define CCOUNT		234
+#define ICOUNT		236
+#define ICOUNTLEVEL	237
+#define EXCVADDR	238
+#define CCOMPARE_0	240
+#define CCOMPARE_1	241
+#define CCOMPARE_2	242
+#define MISC_REG_0	244
+#define MISC_REG_1	245
+
+/*  Special cases (bases of special register series):  */
+#define IBREAKA		128
+#define DBREAKA		144
+#define DBREAKC		160
+#define EPC		176
+#define EPS		192
+#define EXCSAVE		208
+#define CCOMPARE	240
+
+/*  Special names for read-only and write-only interrupt registers:  */
+#define INTREAD		226
+#define INTSET		226
+#define INTCLEAR	227
+
+#endif /* XTENSA_SPECREG_H */
+

include/asm-xtensa/xtensa/config-linux_be/system.h

···
+/*
+ * xtensa/config/system.h -- HAL definitions that are dependent on SYSTEM configuration
+ *
+ *  NOTE: The location and contents of this file are highly subject to change.
+ *
+ *  Source for configuration-independent binaries (which link in a
+ *  configuration-specific HAL library) must NEVER include this file.
+ *  The HAL itself has historically included this file in some instances,
+ *  but this is not appropriate either, because the HAL is meant to be
+ *  core-specific but system independent.
+ */
+
+/*
+ * Copyright (c) 2003 Tensilica, Inc.  All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2.1 of the GNU Lesser General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like.  Any license provided herein, whether implied or
+ * otherwise, applies only to this software file.  Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, write the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307,
+ * USA.
+ */
+
+
+#ifndef XTENSA_CONFIG_SYSTEM_H
+#define XTENSA_CONFIG_SYSTEM_H
+
+/*#include <xtensa/hal.h>*/
+
+
+
+/*----------------------------------------------------------------------
+				DEVICE ADDRESSES
+  ----------------------------------------------------------------------*/
+
+/*
+ *  Strange place to find these, but the configuration GUI
+ *  allows moving these around to account for various core
+ *  configurations.  Specific boards (and their BSP software)
+ *  will have specific meanings for these components.
+ */
+
+/*  I/O Block areas:  */
+#define XSHAL_IOBLOCK_CACHED_VADDR	0xE0000000
+#define XSHAL_IOBLOCK_CACHED_PADDR	0xF0000000
+#define XSHAL_IOBLOCK_CACHED_SIZE	0x0E000000
+
+#define XSHAL_IOBLOCK_BYPASS_VADDR	0xF0000000
+#define XSHAL_IOBLOCK_BYPASS_PADDR	0xF0000000
+#define XSHAL_IOBLOCK_BYPASS_SIZE	0x0E000000
+
+/*  System ROM:  */
+#define XSHAL_ROM_VADDR		0xEE000000
+#define XSHAL_ROM_PADDR		0xFE000000
+#define XSHAL_ROM_SIZE		0x00400000
+/*  Largest available area (free of vectors):  */
+#define XSHAL_ROM_AVAIL_VADDR	0xEE00052C
+#define XSHAL_ROM_AVAIL_VSIZE	0x003FFAD4
+
+/*  System RAM:  */
+#define XSHAL_RAM_VADDR		0xD0000000
+#define XSHAL_RAM_PADDR		0x00000000
+#define XSHAL_RAM_VSIZE		0x08000000
+#define XSHAL_RAM_PSIZE		0x10000000
+#define XSHAL_RAM_SIZE		XSHAL_RAM_PSIZE
+/*  Largest available area (free of vectors):  */
+#define XSHAL_RAM_AVAIL_VADDR	0xD0000370
+#define XSHAL_RAM_AVAIL_VSIZE	0x07FFFC90
+
+/*
+ *  Shadow system RAM (same device as system RAM, at different address).
+ *  (Emulation boards need this for the SONIC Ethernet driver
+ *   when data caches are configured for writeback mode.)
+ *  NOTE: on full MMU configs, this points to the BYPASS virtual address
+ *  of system RAM, ie. is the same as XSHAL_RAM_* except that virtual
+ *  addresses are viewed through the BYPASS static map rather than
+ *  the CACHED static map.
+ */
+#define XSHAL_RAM_BYPASS_VADDR		0xD8000000
+#define XSHAL_RAM_BYPASS_PADDR		0x00000000
+#define XSHAL_RAM_BYPASS_PSIZE		0x08000000
+
+/*  Alternate system RAM (different device than system RAM):  */
+#define XSHAL_ALTRAM_VADDR		0xCEE00000
+#define XSHAL_ALTRAM_PADDR		0xC0000000
+#define XSHAL_ALTRAM_SIZE		0x00200000
+
+
+/*----------------------------------------------------------------------
+ *			DEVICE-ADDRESS DEPENDENT...
+ *
+ *  Values written to CACHEATTR special register (or its equivalent)
+ *  to enable and disable caches in various modes.
+ *----------------------------------------------------------------------*/
+
+/*----------------------------------------------------------------------
+			BACKWARD COMPATIBILITY ...
+  ----------------------------------------------------------------------*/
+
+/*
+ *  NOTE:  the following two macros are DEPRECATED.  Use the latter
+ *  board-specific macros instead, which are specially tuned for the
+ *  particular target environments' memory maps.
+ */
+#define XSHAL_CACHEATTR_BYPASS		XSHAL_XT2000_CACHEATTR_BYPASS	/* disable caches in bypass mode */
+#define XSHAL_CACHEATTR_DEFAULT		XSHAL_XT2000_CACHEATTR_DEFAULT	/* default setting to enable caches (no writeback!) */
+
+/*----------------------------------------------------------------------
+			ISS (Instruction Set Simulator) SPECIFIC ...
+  ----------------------------------------------------------------------*/
+
+#define XSHAL_ISS_CACHEATTR_WRITEBACK	0x1122222F	/* enable caches in write-back mode */
+#define XSHAL_ISS_CACHEATTR_WRITEALLOC	0x1122222F	/* enable caches in write-allocate mode */
+#define XSHAL_ISS_CACHEATTR_WRITETHRU	0x1122222F	/* enable caches in write-through mode */
+#define XSHAL_ISS_CACHEATTR_BYPASS	0x2222222F	/* disable caches in bypass mode */
+#define XSHAL_ISS_CACHEATTR_DEFAULT	XSHAL_ISS_CACHEATTR_WRITEBACK	/* default setting to enable caches */
+
+/*  For Coware only:  */
+#define XSHAL_COWARE_CACHEATTR_WRITEBACK	0x11222222	/* enable caches in write-back mode */
+#define XSHAL_COWARE_CACHEATTR_WRITEALLOC	0x11222222	/* enable caches in write-allocate mode */
+#define XSHAL_COWARE_CACHEATTR_WRITETHRU	0x11222222	/* enable caches in write-through mode */
+#define XSHAL_COWARE_CACHEATTR_BYPASS		0x22222222	/* disable caches in bypass mode */
+#define XSHAL_COWARE_CACHEATTR_DEFAULT		XSHAL_COWARE_CACHEATTR_WRITEBACK	/* default setting to enable caches */
+
+/*  For BFM and other purposes:  */
+#define XSHAL_ALLVALID_CACHEATTR_WRITEBACK	0x11222222	/* enable caches without any invalid regions */
+#define XSHAL_ALLVALID_CACHEATTR_DEFAULT	XSHAL_ALLVALID_CACHEATTR_WRITEBACK	/* default setting for caches without any invalid regions */
+
+#define XSHAL_ISS_PIPE_REGIONS	0
+#define XSHAL_ISS_SDRAM_REGIONS	0
+
+
+/*----------------------------------------------------------------------
+			XT2000 BOARD SPECIFIC ...
+  ----------------------------------------------------------------------*/
+
+#define XSHAL_XT2000_CACHEATTR_WRITEBACK	0x22FFFFFF	/* enable caches in write-back mode */
+#define XSHAL_XT2000_CACHEATTR_WRITEALLOC	0x22FFFFFF	/* enable caches in write-allocate mode */
+#define XSHAL_XT2000_CACHEATTR_WRITETHRU	0x22FFFFFF	/* enable caches in write-through mode */
+#define XSHAL_XT2000_CACHEATTR_BYPASS		0x22FFFFFF	/* disable caches in bypass mode */
+#define XSHAL_XT2000_CACHEATTR_DEFAULT		XSHAL_XT2000_CACHEATTR_WRITEBACK	/* default setting to enable caches */
+
+#define XSHAL_XT2000_PIPE_REGIONS	0x00001000	/* BusInt pipeline regions */
+#define XSHAL_XT2000_SDRAM_REGIONS	0x00000005	/* BusInt SDRAM regions */
+
+
+/*----------------------------------------------------------------------
+				VECTOR SIZES
+  ----------------------------------------------------------------------*/
+
+/*
+ *  Sizes allocated to vectors by the system (memory map) configuration.
+ *  These sizes are constrained by core configuration (eg. one vector's
+ *  code cannot overflow into another vector) but are dependent on the
+ *  system or board (or LSP) memory map configuration.
+ *
+ *  Whether or not each vector happens to be in a system ROM is also
+ *  a system configuration matter, sometimes useful, included here also:
+ */
+#define XSHAL_RESET_VECTOR_SIZE	0x000004E0
+#define XSHAL_RESET_VECTOR_ISROM	1
+#define XSHAL_USER_VECTOR_SIZE	0x0000001C
+#define XSHAL_USER_VECTOR_ISROM	0
+#define XSHAL_PROGRAMEXC_VECTOR_SIZE	XSHAL_USER_VECTOR_SIZE	/* for backward compatibility */
+#define XSHAL_USEREXC_VECTOR_SIZE	XSHAL_USER_VECTOR_SIZE	/* for backward compatibility */
+#define XSHAL_KERNEL_VECTOR_SIZE	0x0000001C
+#define XSHAL_KERNEL_VECTOR_ISROM	0
+#define XSHAL_STACKEDEXC_VECTOR_SIZE	XSHAL_KERNEL_VECTOR_SIZE	/* for backward compatibility */
+#define XSHAL_KERNELEXC_VECTOR_SIZE	XSHAL_KERNEL_VECTOR_SIZE	/* for backward compatibility */
+#define XSHAL_DOUBLEEXC_VECTOR_SIZE	0x000000E0
+#define XSHAL_DOUBLEEXC_VECTOR_ISROM	0
+#define XSHAL_WINDOW_VECTORS_SIZE	0x00000180
+#define XSHAL_WINDOW_VECTORS_ISROM	0
+#define XSHAL_INTLEVEL2_VECTOR_SIZE	0x0000000C
+#define XSHAL_INTLEVEL2_VECTOR_ISROM	0
+#define XSHAL_INTLEVEL3_VECTOR_SIZE	0x0000000C
+#define XSHAL_INTLEVEL3_VECTOR_ISROM	0
+#define XSHAL_INTLEVEL4_VECTOR_SIZE	0x0000000C
+#define XSHAL_INTLEVEL4_VECTOR_ISROM	1
+#define XSHAL_DEBUG_VECTOR_SIZE		XSHAL_INTLEVEL4_VECTOR_SIZE
+#define XSHAL_DEBUG_VECTOR_ISROM	XSHAL_INTLEVEL4_VECTOR_ISROM
+
+
+#endif /*XTENSA_CONFIG_SYSTEM_H*/
+

include/asm-xtensa/xtensa/config-linux_be/tie.h

···
+/*
+ * xtensa/config/tie.h -- HAL definitions that are dependent on CORE and TIE configuration
+ *
+ *  This header file is sometimes referred to as the "compile-time HAL" or CHAL.
+ *  It was generated for a specific Xtensa processor configuration,
+ *  and furthermore for a specific set of TIE source files that extend
+ *  basic core functionality.
+ *
+ *  Source for configuration-independent binaries (which link in a
+ *  configuration-specific HAL library) must NEVER include this file.
+ *  It is perfectly normal, however, for the HAL source itself to include this file.
+ */
+
+/*
+ * Copyright (c) 2003 Tensilica, Inc.  All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2.1 of the GNU Lesser General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like.  Any license provided herein, whether implied or
+ * otherwise, applies only to this software file.  Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, write the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307,
+ * USA.
+ */
+
+
+#ifndef XTENSA_CONFIG_TIE_H
+#define XTENSA_CONFIG_TIE_H
+
+#include <xtensa/hal.h>
+
+
+/*----------------------------------------------------------------------
+				GENERAL
+  ----------------------------------------------------------------------*/
+
+/*
+ *  Separators for macros that expand into arrays.
+ *  These can be predefined by files that #include this one,
+ *  when different separators are required.
+ */
+/*  Element separator for macros that expand into 1-dimensional arrays:  */
+#ifndef XCHAL_SEP
+#define XCHAL_SEP			,
+#endif
+/*  Array separator for macros that expand into 2-dimensional arrays:  */
+#ifndef XCHAL_SEP2
+#define XCHAL_SEP2			},{
+#endif
+
+
+
+
+
+
+/*----------------------------------------------------------------------
+			COPROCESSORS and EXTRA STATE
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_CP_NUM			0	/* number of coprocessors */
+#define XCHAL_CP_MAX			0	/* max coprocessor id plus one (0 if none) */
+#define XCHAL_CP_MASK			0x00	/* bitmask of coprocessors by id */
+
+/*  Space for coprocessors' state save areas:  */
+#define XCHAL_CP0_SA_SIZE		0
+#define XCHAL_CP1_SA_SIZE		0
+#define XCHAL_CP2_SA_SIZE		0
+#define XCHAL_CP3_SA_SIZE		0
+#define XCHAL_CP4_SA_SIZE		0
+#define XCHAL_CP5_SA_SIZE		0
+#define XCHAL_CP6_SA_SIZE		0
+#define XCHAL_CP7_SA_SIZE		0
+/*  Minimum required alignments of CP state save areas:  */
+#define XCHAL_CP0_SA_ALIGN		1
+#define XCHAL_CP1_SA_ALIGN		1
+#define XCHAL_CP2_SA_ALIGN		1
+#define XCHAL_CP3_SA_ALIGN		1
+#define XCHAL_CP4_SA_ALIGN		1
+#define XCHAL_CP5_SA_ALIGN		1
+#define XCHAL_CP6_SA_ALIGN		1
+#define XCHAL_CP7_SA_ALIGN		1
+
+/*  Indexing macros:  */
+#define _XCHAL_CP_SA_SIZE(n)		XCHAL_CP ## n ## _SA_SIZE
+#define XCHAL_CP_SA_SIZE(n)		_XCHAL_CP_SA_SIZE(n)	/* n = 0 .. 7 */
+#define _XCHAL_CP_SA_ALIGN(n)		XCHAL_CP ## n ## _SA_ALIGN
+#define XCHAL_CP_SA_ALIGN(n)		_XCHAL_CP_SA_ALIGN(n)	/* n = 0 .. 7 */
+
+
+/*  Space for "extra" state (user special registers and non-cp TIE) save area:  */
+#define XCHAL_EXTRA_SA_SIZE		0
+#define XCHAL_EXTRA_SA_ALIGN		1
+
+/*  Total save area size (extra + all coprocessors)  */
+/*  (not useful until xthal_{save,restore}_all_extra() is implemented,  */
+/*   but included for Tor2 beta; doesn't account for alignment!):  */
+#define XCHAL_CPEXTRA_SA_SIZE_TOR2	0	/* Tor2Beta temporary definition -- do not use */
+
+/*  Combined required alignment for all CP and EXTRA state save areas  */
+/*  (does not include required alignment for any base config registers):  */
+#define XCHAL_CPEXTRA_SA_ALIGN		1
+
+/* ... */
+
+
+#ifdef _ASMLANGUAGE
+/*
+ *  Assembly-language specific definitions (assembly macros, etc.).
+ */
+#include <xtensa/config/specreg.h>
+
+/********************
+ *  Macros to save and restore the non-coprocessor TIE portion of EXTRA state.
+ */
+
+/* (none) */
+
+
+/********************
+ *  Macros to create functions that save and restore all EXTRA (non-coprocessor) state
+ *  (does not include zero-overhead loop registers and non-optional registers).
+ */
+
+	/*
+	 *  Macro that expands to the body of a function that
+	 *  stores the extra (non-coprocessor) optional/custom state.
+	 *	Entry:	a2 = ptr to save area in which to save extra state
+	 *	Exit:	any register a2-a15 (?) may have been clobbered.
+	 */
+	.macro	xchal_extra_store_funcbody
+	.endm
+
+
+	/*
+	 *  Macro that expands to the body of a function that
+	 *  loads the extra (non-coprocessor) optional/custom state.
+	 *	Entry:	a2 = ptr to save area from which to restore extra state
+	 *	Exit:	any register a2-a15 (?) may have been clobbered.
+	 */
+	.macro	xchal_extra_load_funcbody
+	.endm
+
+
+/********************
+ *  Macros to save and restore the state of each TIE coprocessor.
+ */
+
+
+
+/********************
+ *  Macros to create functions that save and restore the state of *any* TIE coprocessor.
+ */
+
+	/*
+	 *  Macro that expands to the body of a function
+	 *  that stores the selected coprocessor's state (registers etc).
+	 *	Entry:	a2 = ptr to save area in which to save cp state
+	 *		a3 = coprocessor number
+	 *	Exit:	any register a2-a15 (?) may have been clobbered.
+	 */
+	.macro	xchal_cpi_store_funcbody
+	.endm
+
+
+	/*
+	 *  Macro that expands to the body of a function
+	 *  that loads the selected coprocessor's state (registers etc).
+	 *	Entry:	a2 = ptr to save area from which to restore cp state
+	 *		a3 = coprocessor number
+	 *	Exit:	any register a2-a15 (?) may have been clobbered.
+	 */
+	.macro	xchal_cpi_load_funcbody
+	.endm
+
+#endif /*_ASMLANGUAGE*/
+
+
+/*
+ *  Contents of save areas in terms of libdb register numbers.
+ *  NOTE:  CONTENTS_LIBDB_{UREG,REGF} macros are not defined in this file;
+ *  it is up to the user of this header file to define these macros
+ *  usefully before each expansion of the CONTENTS_LIBDB macros.
+ *  (Fields rsv[123] are reserved for future additions; they are currently
+ *   set to zero but may be set to some useful values in the future.)
+ *
+ *	CONTENTS_LIBDB_SREG(libdbnum, offset, size, align, rsv1, name, sregnum, bitmask, rsv2, rsv3)
+ *	CONTENTS_LIBDB_UREG(libdbnum, offset, size, align, rsv1, name, uregnum, bitmask, rsv2, rsv3)
+ *	CONTENTS_LIBDB_REGF(libdbnum, offset, size, align, rsv1, name, index, numentries, contentsize, regname_base, regfile_name, rsv2, rsv3)
+ */
+
+#define XCHAL_EXTRA_SA_CONTENTS_LIBDB_NUM	0
+#define XCHAL_EXTRA_SA_CONTENTS_LIBDB	/* empty */
+
+#define XCHAL_CP0_SA_CONTENTS_LIBDB_NUM	0
+#define XCHAL_CP0_SA_CONTENTS_LIBDB	/* empty */
+
+#define XCHAL_CP1_SA_CONTENTS_LIBDB_NUM	0
+#define XCHAL_CP1_SA_CONTENTS_LIBDB	/* empty */
+
+#define XCHAL_CP2_SA_CONTENTS_LIBDB_NUM	0
+#define XCHAL_CP2_SA_CONTENTS_LIBDB	/* empty */
+
+#define XCHAL_CP3_SA_CONTENTS_LIBDB_NUM	0
+#define XCHAL_CP3_SA_CONTENTS_LIBDB	/* empty */
+
+#define XCHAL_CP4_SA_CONTENTS_LIBDB_NUM	0
+#define XCHAL_CP4_SA_CONTENTS_LIBDB	/* empty */
+
+#define XCHAL_CP5_SA_CONTENTS_LIBDB_NUM	0
+#define XCHAL_CP5_SA_CONTENTS_LIBDB	/* empty */
+
+#define XCHAL_CP6_SA_CONTENTS_LIBDB_NUM	0
+#define XCHAL_CP6_SA_CONTENTS_LIBDB	/* empty */
+
+#define XCHAL_CP7_SA_CONTENTS_LIBDB_NUM	0
+#define XCHAL_CP7_SA_CONTENTS_LIBDB	/* empty */
+
+
+
+
+
+
+/*----------------------------------------------------------------------
+				MISC
+  ----------------------------------------------------------------------*/
+
+#if 0	/* is there something equivalent for user TIE? */
+#define XCHAL_CORE_ID			"linux_be"	/* configuration's alphanumeric core identifier
+							   (CoreID) set in the Xtensa Processor Generator */
+
+#define XCHAL_BUILD_UNIQUE_ID		0x00003256	/* software build-unique ID (22-bit) */
+
+/*  These definitions describe the hardware targeted by this software:  */
+#define XCHAL_HW_CONFIGID0		0xC103D1FF	/* config ID reg 0 value (upper 32 of 64 bits) */
+#define XCHAL_HW_CONFIGID1		0x00803256	/* config ID reg 1 value (lower 32 of 64 bits) */
+#define XCHAL_CONFIGID0			XCHAL_HW_CONFIGID0	/* for backward compatibility only -- don't use! */
+#define XCHAL_CONFIGID1			XCHAL_HW_CONFIGID1	/* for backward compatibility only -- don't use! */
+#define XCHAL_HW_RELEASE_MAJOR		1050	/* major release of targeted hardware */
+#define XCHAL_HW_RELEASE_MINOR		1	/* minor release of targeted hardware */
+#define XCHAL_HW_RELEASE_NAME		"T1050.1"	/* full release name of targeted hardware */
+#define XTHAL_HW_REL_T1050	1
+#define XTHAL_HW_REL_T1050_1	1
+#define XCHAL_HW_CONFIGID_RELIABLE	1
+#endif /*0*/
+
+
+
+/*----------------------------------------------------------------------
+				ISA
+  ----------------------------------------------------------------------*/
+
+#if 0	/* these probably don't belong here, but are related to or implemented using TIE */
+#define XCHAL_HAVE_BOOLEANS		0	/* 1 if booleans option configured, 0 otherwise */
+/*  Misc instructions:  */
+#define XCHAL_HAVE_MUL32		0	/* 1 if 32-bit integer multiply option configured, 0 otherwise */
+#define XCHAL_HAVE_MUL32_HIGH		0	/* 1 if MUL32 option includes MULUH and MULSH, 0 otherwise */
+
+#define XCHAL_HAVE_FP			0	/* 1 if floating point option configured, 0 otherwise */
+#endif /*0*/
+
+
+#endif /*XTENSA_CONFIG_TIE_H*/
+

include/asm-xtensa/xtensa/coreasm.h

···
+#ifndef XTENSA_COREASM_H
+#define XTENSA_COREASM_H
+
+/*
+ * THIS FILE IS GENERATED -- DO NOT MODIFY BY HAND
+ *
+ * include/asm-xtensa/xtensa/coreasm.h -- assembler-specific
+ * definitions that depend on CORE configuration.
+ *
+ * Source for configuration-independent binaries (which link in a
+ * configuration-specific HAL library) must NEVER include this file.
+ * It is perfectly normal, however, for the HAL itself to include this
+ * file.
+ *
+ * This file must NOT include xtensa/config/system.h.  Any assembler
+ * header file that depends on system information should likely go in
+ * a new systemasm.h (or sysasm.h) header file.
+ *
+ *  NOTE: macro beqi32 is NOT configuration-dependent, and is placed
+ *        here til we will have configuration-independent header file.
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License.  See the file "COPYING" in the main directory of
+ * this archive for more details.
+ *
+ * Copyright (C) 2002 Tensilica Inc.
+ */
+
+
+#include <xtensa/config/core.h>
+#include <xtensa/config/specreg.h>
+
+/*
+ *  Assembly-language specific definitions (assembly macros, etc.).
+ */
+
+/*----------------------------------------------------------------------
+ *  find_ms_setbit
+ *
+ *  This macro finds the most significant bit that is set in <as>
+ *  and return its index + <base> in <ad>, or <base> - 1 if <as> is zero.
+ *  The index counts starting at zero for the lsbit, so the return
+ *  value ranges from <base>-1 (no bit set) to <base>+31 (msbit set).
+ *
+ *  Parameters:
+ *	<ad>	destination address register (any register)
+ *	<as>	source address register
+ *	<at>	temporary address register (must be different than <as>)
+ *	<base>	constant value added to result (usually 0 or 1)
+ *  On entry:
+ *	<ad> = undefined if different than <as>
+ *	<as> = value whose most significant set bit is to be found
+ *	<at> = undefined
+ *	no other registers are used by this macro.
+ *  On exit:
+ *	<ad> = <base> + index of msbit set in original <as>,
+ *	     = <base> - 1 if original <as> was zero.
+ *	<as> clobbered (if not <ad>)
+ *	<at> clobbered (if not <ad>)
+ *  Example:
+ *	find_ms_setbit a0, a4, a0, 0		-- return in a0 index of msbit set in a4
+ */
+
+	.macro	find_ms_setbit ad, as, at, base
+#if XCHAL_HAVE_NSA
+	movi	\at, 31+\base
+	nsau	\as, \as	// get index of \as, numbered from msbit (32 if absent)
+	sub	\ad, \at, \as	// get numbering from lsbit (0..31, -1 if absent)
+#else /* XCHAL_HAVE_NSA */
+	movi	\at, \base	// start with result of 0 (point to lsbit of 32)
+
+	beqz	\as, 2f		// special case for zero argument: return -1
+	bltui	\as, 0x10000, 1f	// is it one of the 16 lsbits? (if so, check lower 16 bits)
+	addi	\at, \at, 16	// no, increment result to upper 16 bits (of 32)
+	//srli	\as, \as, 16	// check upper half (shift right 16 bits)
+	extui	\as, \as, 16, 16	// check upper half (shift right 16 bits)
+1:	bltui	\as, 0x100, 1f	// is it one of the 8 lsbits? (if so, check lower 8 bits)
+	addi	\at, \at, 8	// no, increment result to upper 8 bits (of 16)
+	srli	\as, \as, 8	// shift right to check upper 8 bits
+1:	bltui	\as, 0x10, 1f	// is it one of the 4 lsbits? (if so, check lower 4 bits)
+	addi	\at, \at, 4	// no, increment result to upper 4 bits (of 8)
+	srli	\as, \as, 4	// shift right 4 bits to check upper half
+1:	bltui	\as, 0x4, 1f	// is it one of the 2 lsbits? (if so, check lower 2 bits)
+	addi	\at, \at, 2	// no, increment result to upper 2 bits (of 4)
+	srli	\as, \as, 2	// shift right 2 bits to check upper half
+1:	bltui	\as, 0x2, 1f	// is it the lsbit?
+	addi	\at, \at, 2	// no, increment result to upper bit (of 2)
+2:	addi	\at, \at, -1	// (from just above: add 1;  from beqz: return -1)
+	//srli	\as, \as, 1
+1:				// done! \at contains index of msbit set (or -1 if none set)
+	.if	0x\ad - 0x\at	// destination different than \at ? (works because regs are a0-a15)
+	mov	\ad, \at	// then move result to \ad
+	.endif
+#endif /* XCHAL_HAVE_NSA */
+	.endm	// find_ms_setbit
+
+/*----------------------------------------------------------------------
+ *  find_ls_setbit
+ *
+ *  This macro finds the least significant bit that is set in <as>,
+ *  and return its index in <ad>.
+ *  Usage is the same as for the find_ms_setbit macro.
+ *  Example:
+ *	find_ls_setbit a0, a4, a0, 0	-- return in a0 index of lsbit set in a4
+ */
+
+	.macro	find_ls_setbit ad, as, at, base
+	neg	\at, \as	// keep only the least-significant bit that is set...
+	and	\as, \at, \as	// ... in \as
+	find_ms_setbit	\ad, \as, \at, \base
+	.endm	// find_ls_setbit
+
+/*----------------------------------------------------------------------
+ *  find_ls_one
+ *
+ *  Same as find_ls_setbit with base zero.
+ *  Source (as) and destination (ad) registers must be different.
+ *  Provided for backward compatibility.
+ */
+
+	.macro	find_ls_one ad, as
+	find_ls_setbit	\ad, \as, \ad, 0
+	.endm	// find_ls_one
+
+/*----------------------------------------------------------------------
+ *  floop, floopnez, floopgtz, floopend
+ *
+ *  These macros are used for fast inner loops that
+ *  work whether or not the Loops options is configured.
+ *  If the Loops option is configured, they simply use
+ *  the zero-overhead LOOP instructions; otherwise
+ *  they use explicit decrement and branch instructions.
+ *
+ *  They are used in pairs, with floop, floopnez or floopgtz
+ *  at the beginning of the loop, and floopend at the end.
+ *
+ *  Each pair of loop macro calls must be given the loop count
+ *  address register and a unique label for that loop.
+ *
+ *  Example:
+ *
+ *	movi	 a3, 16     // loop 16 times
+ *	floop    a3, myloop1
+ *	:
+ *	bnez     a7, end1	// exit loop if a7 != 0
+ *	:
+ *	floopend a3, myloop1
+ *  end1:
+ *
+ *  Like the LOOP instructions, these macros cannot be
+ *  nested, must include at least one instruction,
+ *  cannot call functions inside the loop, etc.
+ *  The loop can be exited by jumping to the instruction
+ *  following floopend (or elsewhere outside the loop),
+ *  or continued by jumping to a NOP instruction placed
+ *  immediately before floopend.
+ *
+ *  Unlike LOOP instructions, the register passed to floop*
+ *  cannot be used inside the loop, because it is used as
+ *  the loop counter if the Loops option is not configured.
+ *  And its value is undefined after exiting the loop.
+ *  And because the loop counter register is active inside
+ *  the loop, you can't easily use this construct to loop
+ *  across a register file using ROTW as you might with LOOP
+ *  instructions, unless you copy the loop register along.
+ */
+
+	/*  Named label version of the macros:  */
+
+	.macro	floop		ar, endlabel
+	floop_		\ar, .Lfloopstart_\endlabel, .Lfloopend_\endlabel
+	.endm
+
+	.macro	floopnez	ar, endlabel
+	floopnez_	\ar, .Lfloopstart_\endlabel, .Lfloopend_\endlabel
+	.endm
+
+	.macro	floopgtz	ar, endlabel
+	floopgtz_	\ar, .Lfloopstart_\endlabel, .Lfloopend_\endlabel
+	.endm
+
+	.macro	floopend	ar, endlabel
+	floopend_	\ar, .Lfloopstart_\endlabel, .Lfloopend_\endlabel
+	.endm
+
+	/*  Numbered local label version of the macros:  */
+#if 0 /*UNTESTED*/
+	.macro	floop89		ar
+	floop_		\ar, 8, 9f
+	.endm
+
+	.macro	floopnez89	ar
+	floopnez_	\ar, 8, 9f
+	.endm
+
+	.macro	floopgtz89	ar
+	floopgtz_	\ar, 8, 9f
+	.endm
+
+	.macro	floopend89	ar
+	floopend_	\ar, 8b, 9
+	.endm
+#endif /*0*/
+
+	/*  Underlying version of the macros:  */
+
+	.macro	floop_	ar, startlabel, endlabelref
+	.ifdef	_infloop_
+	.if	_infloop_
+	.err	// Error: floop cannot be nested
+	.endif
+	.endif
+	.set	_infloop_, 1
+#if XCHAL_HAVE_LOOPS
+	loop	\ar, \endlabelref
+#else /* XCHAL_HAVE_LOOPS */
+\startlabel:
+	addi	\ar, \ar, -1
+#endif /* XCHAL_HAVE_LOOPS */
+	.endm	// floop_
+
+	.macro	floopnez_	ar, startlabel, endlabelref
+	.ifdef	_infloop_
+	.if	_infloop_
+	.err	// Error: floopnez cannot be nested
+	.endif
+	.endif
+	.set	_infloop_, 1
+#if XCHAL_HAVE_LOOPS
+	loopnez	\ar, \endlabelref
+#else /* XCHAL_HAVE_LOOPS */
+	beqz	\ar, \endlabelref
+\startlabel:
+	addi	\ar, \ar, -1
+#endif /* XCHAL_HAVE_LOOPS */
+	.endm	// floopnez_
+
+	.macro	floopgtz_	ar, startlabel, endlabelref
+	.ifdef	_infloop_
+	.if	_infloop_
+	.err	// Error: floopgtz cannot be nested
+	.endif
+	.endif
+	.set	_infloop_, 1
+#if XCHAL_HAVE_LOOPS
+	loopgtz	\ar, \endlabelref
+#else /* XCHAL_HAVE_LOOPS */
+	bltz	\ar, \endlabelref
+	beqz	\ar, \endlabelref
+\startlabel:
+	addi	\ar, \ar, -1
+#endif /* XCHAL_HAVE_LOOPS */
+	.endm	// floopgtz_
+
+
+	.macro	floopend_	ar, startlabelref, endlabel
+	.ifndef	_infloop_
+	.err	// Error: floopend without matching floopXXX
+	.endif
+	.ifeq	_infloop_
+	.err	// Error: floopend without matching floopXXX
+	.endif
+	.set	_infloop_, 0
+#if ! XCHAL_HAVE_LOOPS
+	bnez	\ar, \startlabelref
+#endif /* XCHAL_HAVE_LOOPS */
+\endlabel:
+	.endm	// floopend_
+
+/*----------------------------------------------------------------------
+ *  crsil  --  conditional RSIL (read/set interrupt level)
+ *
+ *  Executes the RSIL instruction if it exists, else just reads PS.
+ *  The RSIL instruction does not exist in the new exception architecture
+ *  if the interrupt option is not selected.
+ */
+
+	.macro	crsil	ar, newlevel
+#if XCHAL_HAVE_OLD_EXC_ARCH || XCHAL_HAVE_INTERRUPTS
+	rsil	\ar, \newlevel
+#else
+	rsr	\ar, PS
+#endif
+	.endm	// crsil
+
+/*----------------------------------------------------------------------
+ *  window_spill{4,8,12}
+ *
+ *  These macros spill callers' register windows to the stack.
+ *  They work for both privileged and non-privileged tasks.
+ *  Must be called from a windowed ABI context, eg. within
+ *  a windowed ABI function (ie. valid stack frame, window
+ *  exceptions enabled, not in exception mode, etc).
+ *
+ *  This macro requires a single invocation of the window_spill_common
+ *  macro in the same assembly unit and section.
+ *
+ *  Note that using window_spill{4,8,12} macros is more efficient
+ *  than calling a function implemented using window_spill_function,
+ *  because the latter needs extra code to figure out the size of
+ *  the call to the spilling function.
+ *
+ *  Example usage:
+ *
+ *		.text
+ *		.align	4
+ *		.global	some_function
+ *		.type	some_function,@function
+ *	some_function:
+ *		entry	a1, 16
+ *		:
+ *		:
+ *
+ *		window_spill4	// spill windows of some_function's callers; preserves a0..a3 only;
+ *				// to use window_spill{8,12} in this example function we'd have
+ *				// to increase space allocated by the entry instruction, because
+ *				// 16 bytes only allows call4; 32 or 48 bytes (+locals) are needed
+ *				// for call8/window_spill8 or call12/window_spill12 respectively.
+ *		:
+ *
+ *		retw
+ *
+ *		window_spill_common	// instantiates code used by window_spill4
+ *
+ *
+ *  On entry:
+ *	none (if window_spill4)
+ *	stack frame has enough space allocated for call8 (if window_spill8)
+ *	stack frame has enough space allocated for call12 (if window_spill12)
+ *  On exit:
+ *	 a4..a15 clobbered (if window_spill4)
+ *	 a8..a15 clobbered (if window_spill8)
+ *	a12..a15 clobbered (if window_spill12)
+ *	no caller windows are in live registers
+ */
+
+	.macro	window_spill4
+#if XCHAL_HAVE_WINDOWED
+# if XCHAL_NUM_AREGS == 16
+	movi	a15, 0			// for 16-register files, no need to call to reach the end
+# elif XCHAL_NUM_AREGS == 32
+	call4	.L__wdwspill_assist28	// call deep enough to clear out any live callers
+# elif XCHAL_NUM_AREGS == 64
+	call4	.L__wdwspill_assist60	// call deep enough to clear out any live callers
+# endif
+#endif
+	.endm	// window_spill4
+
+	.macro	window_spill8
+#if XCHAL_HAVE_WINDOWED
+# if XCHAL_NUM_AREGS == 16
+	movi	a15, 0			// for 16-register files, no need to call to reach the end
+# elif XCHAL_NUM_AREGS == 32
+	call8	.L__wdwspill_assist24	// call deep enough to clear out any live callers
+# elif XCHAL_NUM_AREGS == 64
+	call8	.L__wdwspill_assist56	// call deep enough to clear out any live callers
+# endif
+#endif
+	.endm	// window_spill8
+
+	.macro	window_spill12
+#if XCHAL_HAVE_WINDOWED
+# if XCHAL_NUM_AREGS == 16
+	movi	a15, 0			// for 16-register files, no need to call to reach the end
+# elif XCHAL_NUM_AREGS == 32
+	call12	.L__wdwspill_assist20	// call deep enough to clear out any live callers
+# elif XCHAL_NUM_AREGS == 64
+	call12	.L__wdwspill_assist52	// call deep enough to clear out any live callers
+# endif
+#endif
+	.endm	// window_spill12
+
+/*----------------------------------------------------------------------
+ *  window_spill_function
+ *
+ *  This macro outputs a function that will spill its caller's callers'
+ *  register windows to the stack.  Eg. it could be used to implement
+ *  a version of xthal_window_spill() that works in non-privileged tasks.
+ *  This works for both privileged and non-privileged tasks.
+ *
+ *  Typical usage:
+ *
+ *		.text
+ *		.align	4
+ *		.global	my_spill_function
+ *		.type	my_spill_function,@function
+ *	my_spill_function:
+ *		window_spill_function
+ *
+ *  On entry to resulting function:
+ *	none
+ *  On exit from resulting function:
+ *	none (no caller windows are in live registers)
+ */
+
+	.macro	window_spill_function
+#if XCHAL_HAVE_WINDOWED
+# if XCHAL_NUM_AREGS == 32
+	entry	sp, 48
+	bbci.l	a0, 31, 1f		// branch if called with call4
+	bbsi.l	a0, 30, 2f		// branch if called with call12
+	call8	.L__wdwspill_assist16	// called with call8, only need another 8
+	retw
+1:	call12	.L__wdwspill_assist16	// called with call4, only need another 12
+	retw
+2:	call4	.L__wdwspill_assist16	// called with call12, only need another 4
+	retw
+# elif XCHAL_NUM_AREGS == 64
+	entry	sp, 48
+	bbci.l	a0, 31, 1f		// branch if called with call4
+	bbsi.l	a0, 30, 2f		// branch if called with call12
+	call4	.L__wdwspill_assist52	// called with call8, only need a call4
+	retw
+1:	call8	.L__wdwspill_assist52	// called with call4, only need a call8
+	retw
+2:	call12	.L__wdwspill_assist40	// called with call12, can skip a call12
+	retw
+# elif XCHAL_NUM_AREGS == 16
+	entry	sp, 16
+	bbci.l	a0, 31, 1f	// branch if called with call4
+	bbsi.l	a0, 30, 2f	// branch if called with call12
+	movi	a7, 0		// called with call8
+	retw
+1:	movi	a11, 0		// called with call4
+2:	retw			// if called with call12, everything already spilled
+
+//	movi	a15, 0		// trick to spill all but the direct caller
+//	j	1f
+//	//  The entry instruction is magical in the assembler (gets auto-aligned)
+//	//  so we have to jump to it to avoid falling through the padding.
+//	//  We need entry/retw to know where to return.
+//1:	entry	sp, 16
+//	retw
+# else
+#  error "unrecognized address register file size"
+# endif
+#endif /* XCHAL_HAVE_WINDOWED */
+	window_spill_common
+	.endm	// window_spill_function
+
+/*----------------------------------------------------------------------
+ *  window_spill_common
+ *
+ *  Common code used by any number of invocations of the window_spill##
+ *  and window_spill_function macros.
+ *
+ *  Must be instantiated exactly once within a given assembly unit,
+ *  within call/j range of and same section as window_spill##
+ *  macro invocations for that assembly unit.
+ *  (Is automatically instantiated by the window_spill_function macro.)
+ */
+
+	.macro	window_spill_common
+#if XCHAL_HAVE_WINDOWED && (XCHAL_NUM_AREGS == 32 || XCHAL_NUM_AREGS == 64)
+	.ifndef	.L__wdwspill_defined
+# if XCHAL_NUM_AREGS >= 64
+.L__wdwspill_assist60:
+	entry	sp, 32
+	call8	.L__wdwspill_assist52
+	retw
+.L__wdwspill_assist56:
+	entry	sp, 16
+	call4	.L__wdwspill_assist52
+	retw
+.L__wdwspill_assist52:
+	entry	sp, 48
+	call12	.L__wdwspill_assist40
+	retw
+.L__wdwspill_assist40:
+	entry	sp, 48
+	call12	.L__wdwspill_assist28
+	retw
+# endif
+.L__wdwspill_assist28:
+	entry	sp, 48
+	call12	.L__wdwspill_assist16
+	retw
+.L__wdwspill_assist24:
+	entry	sp, 32
+	call8	.L__wdwspill_assist16
+	retw
+.L__wdwspill_assist20:
+	entry	sp, 16
+	call4	.L__wdwspill_assist16
+	retw
+.L__wdwspill_assist16:
+	entry	sp, 16
+	movi	a15, 0
+	retw
+	.set	.L__wdwspill_defined, 1
+	.endif
+#endif /* XCHAL_HAVE_WINDOWED with 32 or 64 aregs */
+	.endm	// window_spill_common
+
+/*----------------------------------------------------------------------
+ *  beqi32
+ *
+ *  macro implements version of beqi for arbitrary 32-bit immidiate value
+ *
+ *     beqi32 ax, ay, imm32, label
+ *
+ *  Compares value in register ax with imm32 value and jumps to label if
+ *  equal. Clobberes register ay if needed
+ *
+ */
+   .macro beqi32	ax, ay, imm, label
+    .ifeq ((\imm-1) & ~7)	// 1..8 ?
+		beqi	\ax, \imm, \label
+    .else
+      .ifeq (\imm+1)		// -1 ?
+		beqi	\ax, \imm, \label
+      .else
+        .ifeq (\imm)		// 0 ?
+		beqz	\ax, \label
+        .else
+		//  We could also handle immediates 10,12,16,32,64,128,256
+		//  but it would be a long macro...
+		movi	\ay, \imm
+		beq	\ax, \ay, \label
+        .endif
+      .endif
+    .endif
+   .endm // beqi32
+
+#endif /*XTENSA_COREASM_H*/
+

include/asm-xtensa/xtensa/corebits.h

···
+#ifndef XTENSA_COREBITS_H
+#define XTENSA_COREBITS_H
+
+/*
+ * THIS FILE IS GENERATED -- DO NOT MODIFY BY HAND
+ *
+ * xtensa/corebits.h - Xtensa Special Register field positions and masks.
+ *
+ * (In previous releases, these were defined in specreg.h, a generated file.
+ *  This file is not generated, i.e. it is processor configuration independent.)
+ */
+
+
+/*  EXCCAUSE register fields:  */
+#define EXCCAUSE_EXCCAUSE_SHIFT	0
+#define EXCCAUSE_EXCCAUSE_MASK	0x3F
+/*  Exception causes (mostly incomplete!):  */
+#define EXCCAUSE_ILLEGAL		0
+#define EXCCAUSE_SYSCALL		1
+#define EXCCAUSE_IFETCHERROR		2
+#define EXCCAUSE_LOADSTOREERROR		3
+#define EXCCAUSE_LEVEL1INTERRUPT	4
+#define EXCCAUSE_ALLOCA			5
+
+/*  PS register fields:  */
+#define PS_WOE_SHIFT		18
+#define PS_WOE_MASK		0x00040000
+#define PS_WOE			PS_WOE_MASK
+#define PS_CALLINC_SHIFT	16
+#define PS_CALLINC_MASK		0x00030000
+#define PS_CALLINC(n)		(((n)&3)<<PS_CALLINC_SHIFT)	/* n = 0..3 */
+#define PS_OWB_SHIFT		8
+#define PS_OWB_MASK		0x00000F00
+#define PS_OWB(n)		(((n)&15)<<PS_OWB_SHIFT)	/* n = 0..15 (or 0..7) */
+#define PS_RING_SHIFT		6
+#define PS_RING_MASK		0x000000C0
+#define PS_RING(n)		(((n)&3)<<PS_RING_SHIFT)	/* n = 0..3 */
+#define PS_UM_SHIFT		5
+#define PS_UM_MASK		0x00000020
+#define PS_UM			PS_UM_MASK
+#define PS_EXCM_SHIFT		4
+#define PS_EXCM_MASK		0x00000010
+#define PS_EXCM			PS_EXCM_MASK
+#define PS_INTLEVEL_SHIFT	0
+#define PS_INTLEVEL_MASK	0x0000000F
+#define PS_INTLEVEL(n)		((n)&PS_INTLEVEL_MASK)		/* n = 0..15 */
+/*  Backward compatibility (deprecated):  */
+#define PS_PROGSTACK_SHIFT	PS_UM_SHIFT
+#define PS_PROGSTACK_MASK	PS_UM_MASK
+#define PS_PROG_SHIFT		PS_UM_SHIFT
+#define PS_PROG_MASK		PS_UM_MASK
+#define PS_PROG			PS_UM
+
+/*  DBREAKCn register fields:  */
+#define DBREAKC_MASK_SHIFT		0
+#define DBREAKC_MASK_MASK		0x0000003F
+#define DBREAKC_LOADBREAK_SHIFT		30
+#define DBREAKC_LOADBREAK_MASK		0x40000000
+#define DBREAKC_STOREBREAK_SHIFT	31
+#define DBREAKC_STOREBREAK_MASK		0x80000000
+
+/*  DEBUGCAUSE register fields:  */
+#define DEBUGCAUSE_DEBUGINT_SHIFT	5
+#define DEBUGCAUSE_DEBUGINT_MASK	0x20	/* debug interrupt */
+#define DEBUGCAUSE_BREAKN_SHIFT		4
+#define DEBUGCAUSE_BREAKN_MASK		0x10	/* BREAK.N instruction */
+#define DEBUGCAUSE_BREAK_SHIFT		3
+#define DEBUGCAUSE_BREAK_MASK		0x08	/* BREAK instruction */
+#define DEBUGCAUSE_DBREAK_SHIFT		2
+#define DEBUGCAUSE_DBREAK_MASK		0x04	/* DBREAK match */
+#define DEBUGCAUSE_IBREAK_SHIFT		1
+#define DEBUGCAUSE_IBREAK_MASK		0x02	/* IBREAK match */
+#define DEBUGCAUSE_ICOUNT_SHIFT		0
+#define DEBUGCAUSE_ICOUNT_MASK		0x01	/* ICOUNT would increment to zero */
+
+#endif /*XTENSA_COREBITS_H*/
+

include/asm-xtensa/xtensa/hal.h

···
+#ifndef XTENSA_HAL_H
+#define XTENSA_HAL_H
+
+/*
+ * THIS FILE IS GENERATED -- DO NOT MODIFY BY HAND
+ *
+ * include/asm-xtensa/xtensa/hal.h -- contains a definition of the
+ * Core HAL interface.
+ *
+ * All definitions in this header file are independent of any specific
+ * Xtensa processor configuration.  Thus an OS or other software can
+ * include this header file and be compiled into configuration-
+ * independent objects that can be distributed and eventually linked
+ * to the HAL library (libhal.a) to create a configuration-specific
+ * final executable.
+ *
+ * Certain definitions, however, are release-specific -- such as the
+ * XTHAL_RELEASE_xxx macros (or additions made in later releases).
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2002 Tensilica Inc.
+ */
+
+
+/*----------------------------------------------------------------------
+  			 Constant Definitions
+			(shared with assembly)
+  ----------------------------------------------------------------------*/
+
+/*  Software release information (not configuration-specific!):  */
+#define XTHAL_RELEASE_MAJOR	1050
+#define XTHAL_RELEASE_MINOR	0
+#define XTHAL_RELEASE_NAME	"T1050.0-2002-08-06-eng0"
+#define XTHAL_RELEASE_INTERNAL	"2002-08-06-eng0"
+#define XTHAL_REL_T1050	1
+#define XTHAL_REL_T1050_0	1
+#define XTHAL_REL_T1050_0_2002	1
+#define XTHAL_REL_T1050_0_2002_08	1
+#define XTHAL_REL_T1050_0_2002_08_06	1
+#define XTHAL_REL_T1050_0_2002_08_06_ENG0	1
+
+/*  HAL version numbers (these names are for backward compatibility):  */
+#define XTHAL_MAJOR_REV		XTHAL_RELEASE_MAJOR
+#define XTHAL_MINOR_REV		XTHAL_RELEASE_MINOR
+/*
+ *  A bit of software release history on values of XTHAL_{MAJOR,MINOR}_REV:
+ *
+ *	Release		MAJOR	MINOR		Comment
+ *	=======		=====	=====		=======
+ *	T1015.n		n/a	n/a		(HAL not yet available)
+ *	T1020.{0,1,2}	0	1		(HAL beta)
+ *	T1020.{3,4}	0	2		First release.
+ *	T1020.n (n>4)	0	2 or >3		(TBD)
+ *	T1030.0		0	1		(HAL beta)
+ *	T1030.{1,2}	0	3		Equivalent to first release.
+ *	T1030.n (n>=3)	0	>= 3		(TBD)
+ *	T1040.n		1040	n		Full CHAL available from T1040.2
+ *	T1050.n		1050	n		Current release.
+ *
+ *
+ *  Note:  there is a distinction between the software release with
+ *  which something is compiled (accessible using XTHAL_RELEASE_* macros)
+ *  and the software release with which the HAL library was compiled
+ *  (accessible using Xthal_release_* global variables).  This
+ *  distinction is particularly relevant for vendors that distribute
+ *  configuration-independent binaries (eg. an OS), where their customer
+ *  might link it with a HAL of a different Xtensa software release.
+ *  In this case, it may be appropriate for the OS to verify at run-time
+ *  whether XTHAL_RELEASE_* and Xthal_release_* are compatible.
+ *  [Guidelines as to which release is compatible with which are not
+ *  currently provided explicitly, but might be inferred from reading
+ *  OSKit documentation for all releases -- compatibility is also highly
+ *  dependent on which HAL features are used.  Each release is usually
+ *  backward compatible, with very few exceptions if any.]
+ *
+ *  Notes:
+ *	Tornado 2.0 supported in T1020.3+, T1030.1+, and T1040.{0,1} only.
+ *	Tornado 2.0.2 supported in T1040.2+, and T1050.
+ *	Compile-time HAL port of NucleusPlus supported by T1040.2+ and T1050.
+ */
+
+
+/*
+ *  Architectural limits, independent of configuration.
+ *  Note that these are ISA-defined limits, not micro-architecture implementation
+ *  limits enforced by the Xtensa Processor Generator (which may be stricter than
+ *  these below).
+ */
+#define XTHAL_MAX_CPS		8	/* max number of coprocessors (0..7) */
+#define XTHAL_MAX_INTERRUPTS	32	/* max number of interrupts (0..31) */
+#define XTHAL_MAX_INTLEVELS	16	/* max number of interrupt levels (0..15) */
+					/* (as of T1040, implementation limit is 7: 0..6) */
+#define XTHAL_MAX_TIMERS	4	/* max number of timers (CCOMPARE0..CCOMPARE3) */
+					/* (as of T1040, implementation limit is 3: 0..2) */
+
+/*  Misc:  */
+#define XTHAL_LITTLEENDIAN		0
+#define XTHAL_BIGENDIAN			1
+
+
+/*  Interrupt types:  */
+#define XTHAL_INTTYPE_UNCONFIGURED	0
+#define XTHAL_INTTYPE_SOFTWARE		1
+#define XTHAL_INTTYPE_EXTERN_EDGE	2
+#define XTHAL_INTTYPE_EXTERN_LEVEL	3
+#define XTHAL_INTTYPE_TIMER		4
+#define XTHAL_INTTYPE_NMI		5
+#define XTHAL_MAX_INTTYPES		6	/* number of interrupt types */
+
+/*  Timer related:  */
+#define XTHAL_TIMER_UNCONFIGURED	-1	/* Xthal_timer_interrupt[] value for non-existent timers */
+#define XTHAL_TIMER_UNASSIGNED	XTHAL_TIMER_UNCONFIGURED	/* (for backwards compatibility only) */
+
+
+/*  Access Mode bits (tentative):  */	/* bit abbr unit short_name       PPC equ - Description */
+#define XTHAL_AMB_EXCEPTION	0	/* 001 E EX fls: EXception        none    - generate exception on any access (aka "illegal") */
+#define XTHAL_AMB_HITCACHE	1	/* 002 C CH fls: use Cache on Hit ~(I CI) - use cache on hit -- way from tag match [or H HC, or U UC] (ISA: same, except for Isolate case) */
+#define XTHAL_AMB_ALLOCATE	2	/* 004 A AL fl?: ALlocate         none    - refill cache on miss -- way from LRU [or F FI fill] (ISA: Read/Write Miss Refill) */
+#define XTHAL_AMB_WRITETHRU	3	/* 008 W WT --s: WriteThrough     W WT    - store immediately to memory (ISA: same) */
+#define XTHAL_AMB_ISOLATE	4	/* 010 I IS fls: ISolate          none    - use cache regardless of hit-vs-miss -- way from vaddr (ISA: use-cache-on-miss+hit) */
+#define XTHAL_AMB_GUARD		5	/* 020 G GU ?l?: GUard            G *     - non-speculative; spec/replay refs not permitted */
+#if 0
+#define XTHAL_AMB_ORDERED	x	/* 000 O OR fls: ORdered          G *     - mem accesses cannot be out of order */
+#define XTHAL_AMB_FUSEWRITES	x	/* 000 F FW --s: FuseWrites       none    - allow combining/merging multiple writes (to same datapath data unit) into one (implied by writeback) */
+#define XTHAL_AMB_COHERENT	x	/* 000 M MC fl?: Mem/MP Coherent  M       - on reads, other CPUs/bus-masters may need to supply data */
+#define XTHAL_AMB_TRUSTED	x	/* 000 T TR ?l?: TRusted          none    - memory will not bus error (if it does, handle as fatal imprecise interrupt) */
+#define XTHAL_AMB_PREFETCH	x	/* 000 P PR fl?: PRefetch         none    - on refill, read line+1 into prefetch buffers */
+#define XTHAL_AMB_STREAM	x	/* 000 S ST ???: STreaming        none    - access one of N stream buffers */
+#endif /*0*/
+
+#define XTHAL_AM_EXCEPTION	(1<<XTHAL_AMB_EXCEPTION)
+#define XTHAL_AM_HITCACHE	(1<<XTHAL_AMB_HITCACHE)
+#define XTHAL_AM_ALLOCATE	(1<<XTHAL_AMB_ALLOCATE)
+#define XTHAL_AM_WRITETHRU	(1<<XTHAL_AMB_WRITETHRU)
+#define XTHAL_AM_ISOLATE	(1<<XTHAL_AMB_ISOLATE)
+#define XTHAL_AM_GUARD		(1<<XTHAL_AMB_GUARD)
+#if 0
+#define XTHAL_AM_ORDERED	(1<<XTHAL_AMB_ORDERED)
+#define XTHAL_AM_FUSEWRITES	(1<<XTHAL_AMB_FUSEWRITES)
+#define XTHAL_AM_COHERENT	(1<<XTHAL_AMB_COHERENT)
+#define XTHAL_AM_TRUSTED	(1<<XTHAL_AMB_TRUSTED)
+#define XTHAL_AM_PREFETCH	(1<<XTHAL_AMB_PREFETCH)
+#define XTHAL_AM_STREAM		(1<<XTHAL_AMB_STREAM)
+#endif /*0*/
+
+/*
+ *  Allowed Access Modes (bit combinations).
+ *
+ *  Columns are:
+ *  "FOGIWACE"
+ *	Access mode bits (see XTHAL_AMB_xxx above).
+ *	<letter> = bit is set
+ *	'-'      = bit is clear
+ *	'.'      = bit is irrelevant / don't care, as follows:
+ *			E=1 makes all others irrelevant
+ *			W,F relevant only for stores
+ *  "2345"
+ *	Indicates which Xtensa releases support the corresponding
+ *	access mode.  Releases for each character column are:
+ *		2 = prior to T1020.2:   T1015 (V1.5), T1020.0, T1020.1
+ *		3 = T1020.2 and later:  T1020.2+, T1030
+ *		4 = T1040
+ *		5 = T1050 (maybe)
+ *	And the character column contents are:
+ *		<number> = support by release(s)
+ *		"." = unsupported by release(s)
+ *		"?" = support unknown
+ */
+					/* FOGIWACE 2345 */
+/*  For instruction fetch:  */
+#define XTHAL_FAM_EXCEPTION	0x001	/* .......E 2345 exception */
+#define XTHAL_FAM_ISOLATE	0x012	/* .--I.-C- .... isolate */
+#define XTHAL_FAM_BYPASS	0x000	/* .---.--- 2345 bypass */
+#define XTHAL_FAM_NACACHED	0x002	/* .---.-C- .... cached no-allocate (frozen) */
+#define XTHAL_FAM_CACHED	0x006	/* .---.AC- 2345 cached */
+/*  For data load:  */
+#define XTHAL_LAM_EXCEPTION	0x001	/* .......E 2345 exception */
+#define XTHAL_LAM_ISOLATE	0x012	/* .--I.-C- 2345 isolate */
+#define XTHAL_LAM_BYPASS	0x000	/* .O--.--- 2... bypass speculative */
+#define XTHAL_LAM_BYPASSG	0x020	/* .OG-.--- .345 bypass guarded */
+#define XTHAL_LAM_NACACHED	0x002	/* .O--.-C- 2... cached no-allocate speculative */
+#define XTHAL_LAM_NACACHEDG	0x022	/* .OG-.-C- .345 cached no-allocate guarded */
+#define XTHAL_LAM_CACHED	0x006	/* .---.AC- 2345 cached speculative */
+#define XTHAL_LAM_CACHEDG	0x026	/* .?G-.AC- .... cached guarded */
+/*  For data store:  */
+#define XTHAL_SAM_EXCEPTION	0x001	/* .......E 2345 exception */
+#define XTHAL_SAM_ISOLATE	0x032	/* .-GI--C- 2345 isolate */
+#define XTHAL_SAM_BYPASS	0x028	/* -OG-W--- 2345 bypass */
+/*efine XTHAL_SAM_BYPASSF	0x028*/	/* F-G-W--- ...? bypass write-combined */
+#define XTHAL_SAM_WRITETHRU	0x02A	/* -OG-W-C- 234? writethrough */
+/*efine XTHAL_SAM_WRITETHRUF	0x02A*/	/* F-G-W-C- ...5 writethrough write-combined */
+#define XTHAL_SAM_WRITEALLOC	0x02E	/* -OG-WAC- ...? writethrough-allocate */
+/*efine XTHAL_SAM_WRITEALLOCF	0x02E*/	/* F-G-WAC- ...? writethrough-allocate write-combined */
+#define XTHAL_SAM_WRITEBACK	0x026	/* F-G--AC- ...5 writeback */
+
+#if 0
+/*
+    Cache attribute encoding for CACHEATTR (per ISA):
+    (Note:  if this differs from ISA Ref Manual, ISA has precedence)
+
+	Inst-fetches	Loads		Stores
+	-------------	------------	-------------
+0x0	FCA_EXCEPTION  ?LCA_NACACHED_G*	SCA_WRITETHRU	"uncached"
+0x1	FCA_CACHED	LCA_CACHED	SCA_WRITETHRU	cached
+0x2	FCA_BYPASS	LCA_BYPASS_G*	SCA_BYPASS	bypass
+0x3	FCA_CACHED	LCA_CACHED	SCA_WRITEALLOCF	write-allocate
+		     or LCA_EXCEPTION	SCA_EXCEPTION	(if unimplemented)
+0x4	FCA_CACHED	LCA_CACHED	SCA_WRITEBACK	write-back
+		     or LCA_EXCEPTION	SCA_EXCEPTION	(if unimplemented)
+0x5..D	FCA_EXCEPTION	LCA_EXCEPTION	SCA_EXCEPTION	(reserved)
+0xE	FCA_EXCEPTION	LCA_ISOLATE	SCA_ISOLATE	isolate
+0xF	FCA_EXCEPTION	LCA_EXCEPTION	SCA_EXCEPTION	illegal
+     *  Prior to T1020.2?, guard feature not supported, this defaulted to speculative (no _G)
+*/
+#endif /*0*/
+
+
+#if !defined(__ASSEMBLY__) && !defined(_NOCLANGUAGE)
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*----------------------------------------------------------------------
+  			     HAL
+  ----------------------------------------------------------------------*/
+
+/* Constant to be checked in build = (XTHAL_MAJOR_REV<<16)|XTHAL_MINOR_REV */
+extern const unsigned int Xthal_rev_no;
+
+
+/*----------------------------------------------------------------------
+  			Processor State
+  ----------------------------------------------------------------------*/
+/* save & restore the extra processor state */
+extern void xthal_save_extra(void *base);
+extern void xthal_restore_extra(void *base);
+
+extern void xthal_save_cpregs(void *base, int);
+extern void xthal_restore_cpregs(void *base, int);
+
+/*extern void xthal_save_all_extra(void *base);*/
+/*extern void xthal_restore_all_extra(void *base);*/
+
+/* space for processor state */
+extern const unsigned int Xthal_extra_size;
+extern const unsigned int Xthal_extra_align;
+/* space for TIE register files */
+extern const unsigned int Xthal_cpregs_size[XTHAL_MAX_CPS];
+extern const unsigned int Xthal_cpregs_align[XTHAL_MAX_CPS];
+
+/* total of space for the processor state (for Tor2) */
+extern const unsigned int Xthal_all_extra_size;
+extern const unsigned int Xthal_all_extra_align;
+
+/* initialize the extra processor */
+/*extern void xthal_init_extra(void);*/
+/* initialize the TIE coprocessor */
+/*extern void xthal_init_cp(int);*/
+
+/* initialize the extra processor */
+extern void xthal_init_mem_extra(void *);
+/* initialize the TIE coprocessor */
+extern void xthal_init_mem_cp(void *, int);
+
+/* validate & invalidate the TIE register file */
+extern void xthal_validate_cp(int);
+extern void xthal_invalidate_cp(int);
+
+/* the number of TIE coprocessors contiguous from zero (for Tor2) */
+extern const unsigned int Xthal_num_coprocessors;
+
+/* actual number of coprocessors */
+extern const unsigned char Xthal_cp_num;
+/* index of highest numbered coprocessor, plus one */
+extern const unsigned char Xthal_cp_max;
+/* index of highest allowed coprocessor number, per cfg, plus one */
+/*extern const unsigned char Xthal_cp_maxcfg;*/
+/* bitmask of which coprocessors are present */
+extern const unsigned int  Xthal_cp_mask;
+
+/* read and write cpenable register */
+extern void xthal_set_cpenable(unsigned);
+extern unsigned xthal_get_cpenable(void);
+
+/* read & write extra state register */
+/*extern int xthal_read_extra(void *base, unsigned reg, unsigned *value);*/
+/*extern int xthal_write_extra(void *base, unsigned reg, unsigned value);*/
+
+/* read & write a TIE coprocessor register */
+/*extern int xthal_read_cpreg(void *base, int cp, unsigned reg, unsigned *value);*/
+/*extern int xthal_write_cpreg(void *base, int cp, unsigned reg, unsigned value);*/
+
+/* return coprocessor number based on register */
+/*extern int xthal_which_cp(unsigned reg);*/
+
+/*----------------------------------------------------------------------
+   				Interrupts
+  ----------------------------------------------------------------------*/
+
+/* the number of interrupt levels */
+extern const unsigned char Xthal_num_intlevels;
+/* the number of interrupts */
+extern const unsigned char Xthal_num_interrupts;
+
+/* mask for level of interrupts */
+extern const unsigned int Xthal_intlevel_mask[XTHAL_MAX_INTLEVELS];
+/* mask for level 0 to N interrupts */
+extern const unsigned int Xthal_intlevel_andbelow_mask[XTHAL_MAX_INTLEVELS];
+
+/* level of each interrupt */
+extern const unsigned char Xthal_intlevel[XTHAL_MAX_INTERRUPTS];
+
+/* type per interrupt */
+extern const unsigned char Xthal_inttype[XTHAL_MAX_INTERRUPTS];
+
+/* masks of each type of interrupt */
+extern const unsigned int Xthal_inttype_mask[XTHAL_MAX_INTTYPES];
+
+/* interrupt numbers assigned to each timer interrupt */
+extern const int Xthal_timer_interrupt[XTHAL_MAX_TIMERS];
+
+/***  Virtual interrupt prioritization:  ***/
+
+/*  Convert between interrupt levels (as per PS.INTLEVEL) and virtual interrupt priorities:  */
+extern unsigned	xthal_vpri_to_intlevel(unsigned vpri);
+extern unsigned	xthal_intlevel_to_vpri(unsigned intlevel);
+
+/*  Enables/disables given set (mask) of interrupts; returns previous enabled-mask of all ints:  */
+extern unsigned	xthal_int_enable(unsigned);
+extern unsigned	xthal_int_disable(unsigned);
+
+/*  Set/get virtual priority of an interrupt:  */
+extern int	xthal_set_int_vpri(int intnum, int vpri);
+extern int	xthal_get_int_vpri(int intnum);
+
+/*  Set/get interrupt lockout level for exclusive access to virtual priority data structures:  */
+extern void	xthal_set_vpri_locklevel(unsigned intlevel);
+extern unsigned	xthal_get_vpri_locklevel(void);
+
+/*  Set/get current virtual interrupt priority:  */
+extern unsigned	xthal_set_vpri(unsigned vpri);
+extern unsigned	xthal_get_vpri(unsigned vpri);
+extern unsigned	xthal_set_vpri_intlevel(unsigned intlevel);
+extern unsigned	xthal_set_vpri_lock(void);
+
+
+
+/*----------------------------------------------------------------------
+   			Generic Interrupt Trampolining Support
+  ----------------------------------------------------------------------*/
+
+typedef void (XtHalVoidFunc)(void);
+
+/*
+ *  Bitmask of interrupts currently trampolining down:
+ */
+extern unsigned Xthal_tram_pending;
+
+/*
+ *  Bitmask of which interrupts currently trampolining down
+ *  synchronously are actually enabled; this bitmask is necessary
+ *  because INTENABLE cannot hold that state (sync-trampolining
+ *  interrupts must be kept disabled while trampolining);
+ *  in the current implementation, any bit set here is not set
+ *  in INTENABLE, and vice-versa; once a sync-trampoline is
+ *  handled (at level one), its enable bit must be moved from
+ *  here to INTENABLE:
+ */
+extern unsigned Xthal_tram_enabled;
+
+/*
+ *  Bitmask of interrupts configured for sync trampolining:
+ */
+extern unsigned Xthal_tram_sync;
+
+
+/*  Trampoline support functions:  */
+extern unsigned  xthal_tram_pending_to_service( void );
+extern void      xthal_tram_done( unsigned serviced_mask );
+extern int       xthal_tram_set_sync( int intnum, int sync );
+extern XtHalVoidFunc* xthal_set_tram_trigger_func( XtHalVoidFunc *trigger_fn );
+
+/*  INTENABLE,INTREAD,INTSET,INTCLEAR register access functions:  */
+extern unsigned  xthal_get_intenable( void );
+extern void      xthal_set_intenable( unsigned );
+extern unsigned  xthal_get_intread( void );
+extern void      xthal_set_intset( unsigned );
+extern void      xthal_set_intclear( unsigned );
+
+
+/*----------------------------------------------------------------------
+   				Register Windows
+  ----------------------------------------------------------------------*/
+
+/* number of registers in register window */
+extern const unsigned int  Xthal_num_aregs;
+extern const unsigned char Xthal_num_aregs_log2;
+
+/*  This spill any live register windows (other than the caller's):  */
+extern void      xthal_window_spill( void );
+
+
+/*----------------------------------------------------------------------
+   				Cache
+  ----------------------------------------------------------------------*/
+
+/* size of the cache lines in log2(bytes) */
+extern const unsigned char Xthal_icache_linewidth;
+extern const unsigned char Xthal_dcache_linewidth;
+/* size of the cache lines in bytes */
+extern const unsigned short Xthal_icache_linesize;
+extern const unsigned short Xthal_dcache_linesize;
+/* number of cache sets in log2(lines per way) */
+extern const unsigned char Xthal_icache_setwidth;
+extern const unsigned char Xthal_dcache_setwidth;
+/* cache set associativity (number of ways) */
+extern const unsigned int  Xthal_icache_ways;
+extern const unsigned int  Xthal_dcache_ways;
+/* size of the caches in bytes (ways * 2^(linewidth + setwidth)) */
+extern const unsigned int  Xthal_icache_size;
+extern const unsigned int  Xthal_dcache_size;
+/* cache features */
+extern const unsigned char Xthal_dcache_is_writeback;
+extern const unsigned char Xthal_icache_line_lockable;
+extern const unsigned char Xthal_dcache_line_lockable;
+
+/* cache attribute register control (used by other HAL routines) */
+extern unsigned xthal_get_cacheattr( void );
+extern unsigned xthal_get_icacheattr( void );
+extern unsigned xthal_get_dcacheattr( void );
+extern void     xthal_set_cacheattr( unsigned );
+extern void     xthal_set_icacheattr( unsigned );
+extern void     xthal_set_dcacheattr( unsigned );
+
+/* initialize cache support (must be called once at startup, before all other cache calls) */
+/*extern void xthal_cache_startinit( void );*/
+/* reset caches */
+/*extern void xthal_icache_reset( void );*/
+/*extern void xthal_dcache_reset( void );*/
+/* enable caches */
+extern void xthal_icache_enable( void );	/* DEPRECATED */
+extern void xthal_dcache_enable( void );	/* DEPRECATED */
+/* disable caches */
+extern void xthal_icache_disable( void );	/* DEPRECATED */
+extern void xthal_dcache_disable( void );	/* DEPRECATED */
+
+/* invalidate the caches */
+extern void xthal_icache_all_invalidate( void );
+extern void xthal_dcache_all_invalidate( void );
+extern void xthal_icache_region_invalidate( void *addr, unsigned size );
+extern void xthal_dcache_region_invalidate( void *addr, unsigned size );
+extern void xthal_icache_line_invalidate(void *addr);
+extern void xthal_dcache_line_invalidate(void *addr);
+/* write dirty data back */
+extern void xthal_dcache_all_writeback( void );
+extern void xthal_dcache_region_writeback( void *addr, unsigned size );
+extern void xthal_dcache_line_writeback(void *addr);
+/* write dirty data back and invalidate */
+extern void xthal_dcache_all_writeback_inv( void );
+extern void xthal_dcache_region_writeback_inv( void *addr, unsigned size );
+extern void xthal_dcache_line_writeback_inv(void *addr);
+/* prefetch and lock specified memory range into cache */
+extern void xthal_icache_region_lock( void *addr, unsigned size );
+extern void xthal_dcache_region_lock( void *addr, unsigned size );
+extern void xthal_icache_line_lock(void *addr);
+extern void xthal_dcache_line_lock(void *addr);
+/* unlock from cache */
+extern void xthal_icache_all_unlock( void );
+extern void xthal_dcache_all_unlock( void );
+extern void xthal_icache_region_unlock( void *addr, unsigned size );
+extern void xthal_dcache_region_unlock( void *addr, unsigned size );
+extern void xthal_icache_line_unlock(void *addr);
+extern void xthal_dcache_line_unlock(void *addr);
+
+
+/* sync icache and memory */
+extern void xthal_icache_sync( void );
+/* sync dcache and memory */
+extern void xthal_dcache_sync( void );
+
+/*----------------------------------------------------------------------
+   				Debug
+  ----------------------------------------------------------------------*/
+
+/*  1 if debug option configured, 0 if not:  */
+extern const int Xthal_debug_configured;
+
+/*  Number of instruction and data break registers:  */
+extern const int Xthal_num_ibreak;
+extern const int Xthal_num_dbreak;
+
+/*  Set (plant) and remove software breakpoint, both synchronizing cache:  */
+extern unsigned int xthal_set_soft_break(void *addr);
+extern void         xthal_remove_soft_break(void *addr, unsigned int);
+
+
+/*----------------------------------------------------------------------
+   				Disassembler
+  ----------------------------------------------------------------------*/
+
+/*  Max expected size of the return buffer for a disassembled instruction (hint only):  */
+#define XTHAL_DISASM_BUFSIZE	80
+
+/*  Disassembly option bits for selecting what to return:  */
+#define XTHAL_DISASM_OPT_ADDR	0x0001	/* display address */
+#define XTHAL_DISASM_OPT_OPHEX	0x0002	/* display opcode bytes in hex */
+#define XTHAL_DISASM_OPT_OPCODE	0x0004	/* display opcode name (mnemonic) */
+#define XTHAL_DISASM_OPT_PARMS	0x0008	/* display parameters */
+#define XTHAL_DISASM_OPT_ALL	0x0FFF	/* display everything */
+
+/* routine to get a string for the disassembled instruction */
+extern int xthal_disassemble( unsigned char *instr_buf, void *tgt_addr,
+		       char *buffer, unsigned buflen, unsigned options );
+
+/* routine to get the size of the next instruction. Returns 0 for
+   illegal instruction */
+extern int xthal_disassemble_size( unsigned char *instr_buf );
+
+
+/*----------------------------------------------------------------------
+   				Core Counter
+  ----------------------------------------------------------------------*/
+
+/* counter info */
+extern const unsigned char Xthal_have_ccount;	/* set if CCOUNT register present */
+extern const unsigned char Xthal_num_ccompare;	/* number of CCOMPAREn registers */
+
+/* get CCOUNT register (if not present return 0) */
+extern unsigned xthal_get_ccount(void);
+
+/* set and get CCOMPAREn registers (if not present, get returns 0) */
+extern void     xthal_set_ccompare(int, unsigned);
+extern unsigned xthal_get_ccompare(int);
+
+
+/*----------------------------------------------------------------------
+			Instruction/Data RAM/ROM Access
+  ----------------------------------------------------------------------*/
+
+extern void* xthal_memcpy(void *dst, const void *src, unsigned len);
+extern void* xthal_bcopy(const void *src, void *dst, unsigned len);
+
+/*----------------------------------------------------------------------
+                           MP Synchronization
+  ----------------------------------------------------------------------*/
+extern int      xthal_compare_and_set( int *addr, int test_val, int compare_val );
+extern unsigned xthal_get_prid( void );
+
+/*extern const char  Xthal_have_s32c1i;*/
+extern const unsigned char Xthal_have_prid;
+
+
+/*----------------------------------------------------------------------
+                             Miscellaneous
+  ----------------------------------------------------------------------*/
+
+extern const unsigned int  Xthal_release_major;
+extern const unsigned int  Xthal_release_minor;
+extern const char * const  Xthal_release_name;
+extern const char * const  Xthal_release_internal;
+
+extern const unsigned char Xthal_memory_order;
+extern const unsigned char Xthal_have_windowed;
+extern const unsigned char Xthal_have_density;
+extern const unsigned char Xthal_have_booleans;
+extern const unsigned char Xthal_have_loops;
+extern const unsigned char Xthal_have_nsa;
+extern const unsigned char Xthal_have_minmax;
+extern const unsigned char Xthal_have_sext;
+extern const unsigned char Xthal_have_clamps;
+extern const unsigned char Xthal_have_mac16;
+extern const unsigned char Xthal_have_mul16;
+extern const unsigned char Xthal_have_fp;
+extern const unsigned char Xthal_have_speculation;
+extern const unsigned char Xthal_have_exceptions;
+extern const unsigned char Xthal_xea_version;
+extern const unsigned char Xthal_have_interrupts;
+extern const unsigned char Xthal_have_highlevel_interrupts;
+extern const unsigned char Xthal_have_nmi;
+
+extern const unsigned short Xthal_num_writebuffer_entries;
+
+extern const unsigned int  Xthal_build_unique_id;
+/*  Release info for hardware targeted by software upgrades:  */
+extern const unsigned int  Xthal_hw_configid0;
+extern const unsigned int  Xthal_hw_configid1;
+extern const unsigned int  Xthal_hw_release_major;
+extern const unsigned int  Xthal_hw_release_minor;
+extern const char * const  Xthal_hw_release_name;
+extern const char * const  Xthal_hw_release_internal;
+
+
+/*  Internal memories...  */
+
+extern const unsigned char Xthal_num_instrom;
+extern const unsigned char Xthal_num_instram;
+extern const unsigned char Xthal_num_datarom;
+extern const unsigned char Xthal_num_dataram;
+extern const unsigned char Xthal_num_xlmi;
+extern const unsigned int  Xthal_instrom_vaddr[1];
+extern const unsigned int  Xthal_instrom_paddr[1];
+extern const unsigned int  Xthal_instrom_size [1];
+extern const unsigned int  Xthal_instram_vaddr[1];
+extern const unsigned int  Xthal_instram_paddr[1];
+extern const unsigned int  Xthal_instram_size [1];
+extern const unsigned int  Xthal_datarom_vaddr[1];
+extern const unsigned int  Xthal_datarom_paddr[1];
+extern const unsigned int  Xthal_datarom_size [1];
+extern const unsigned int  Xthal_dataram_vaddr[1];
+extern const unsigned int  Xthal_dataram_paddr[1];
+extern const unsigned int  Xthal_dataram_size [1];
+extern const unsigned int  Xthal_xlmi_vaddr[1];
+extern const unsigned int  Xthal_xlmi_paddr[1];
+extern const unsigned int  Xthal_xlmi_size [1];
+
+
+
+/*----------------------------------------------------------------------
+                         Memory Management Unit
+  ----------------------------------------------------------------------*/
+
+extern const unsigned char Xthal_have_spanning_way;
+extern const unsigned char Xthal_have_identity_map;
+extern const unsigned char Xthal_have_mimic_cacheattr;
+extern const unsigned char Xthal_have_xlt_cacheattr;
+extern const unsigned char Xthal_have_cacheattr;
+extern const unsigned char Xthal_have_tlbs;
+
+extern const unsigned char Xthal_mmu_asid_bits;		/* 0 .. 8 */
+extern const unsigned char Xthal_mmu_asid_kernel;
+extern const unsigned char Xthal_mmu_rings;		/* 1 .. 4 (perhaps 0 if no MMU and/or no protection?) */
+extern const unsigned char Xthal_mmu_ring_bits;
+extern const unsigned char Xthal_mmu_sr_bits;
+extern const unsigned char Xthal_mmu_ca_bits;
+extern const unsigned int  Xthal_mmu_max_pte_page_size;
+extern const unsigned int  Xthal_mmu_min_pte_page_size;
+
+extern const unsigned char Xthal_itlb_way_bits;
+extern const unsigned char Xthal_itlb_ways;
+extern const unsigned char Xthal_itlb_arf_ways;
+extern const unsigned char Xthal_dtlb_way_bits;
+extern const unsigned char Xthal_dtlb_ways;
+extern const unsigned char Xthal_dtlb_arf_ways;
+
+/*  Convert between virtual and physical addresses (through static maps only):  */
+/*** WARNING: these two functions may go away in a future release; don't depend on them! ***/
+extern int  xthal_static_v2p( unsigned vaddr, unsigned *paddrp );
+extern int  xthal_static_p2v( unsigned paddr, unsigned *vaddrp, unsigned cached );
+
+#if 0
+/*******************   EXPERIMENTAL AND TENTATIVE ONLY   ********************/
+
+#define XTHAL_MMU_PAGESZ_COUNT_MAX	8	/* maximum number of different page sizes */
+extern const char	Xthal_mmu_pagesz_count;		/* 0 .. 8		number of different page sizes configured */
+
+/*  Note:  the following table doesn't necessarily have page sizes in increasing order: */
+extern const char	Xthal_mmu_pagesz_log2[XTHAL_MMU_PAGESZ_COUNT_MAX];	/* 10 .. 28 (0 past count) */
+
+/*  Sorted (increasing) table of page sizes, that indexes into the above table: */
+extern const char	Xthal_mmu_pagesz_sorted[XTHAL_MMU_PAGESZ_COUNT_MAX];	/* 0 .. 7 (0 past count) */
+
+/*u32	Xthal_virtual_exceptions;*/	/* bitmask of which exceptions execute in virtual mode... */
+
+extern const char	Xthal_mmu_pte_pagesz_log2_min;	/* ?? minimum page size in PTEs */
+extern const char	Xthal_mmu_pte_pagesz_log2_max;	/* ?? maximum page size in PTEs */
+
+/*  Cache Attribute Bits Implemented by the Cache (part of the cache abstraction) */
+extern const char	Xthal_icache_fca_bits_implemented;	/* ITLB/UTLB only! */
+extern const char	Xthal_dcache_lca_bits_implemented;	/* DTLB/UTLB only! */
+extern const char	Xthal_dcache_sca_bits_implemented; 	/* DTLB/UTLB only! */
+
+/*  Per TLB Parameters (Instruction, Data, Unified)  */
+struct XtHalMmuTlb	Xthal_itlb;	/* description of MMU I-TLB generic features */
+struct XtHalMmuTlb	Xthal_dtlb;	/* description of MMU D-TLB generic features */
+struct XtHalMmuTlb	Xthal_utlb;	/* description of MMU U-TLB generic features */
+
+#define XTHAL_MMU_WAYS_MAX	8	/* maximum number of ways (associativities) for each TLB */
+
+/*  Structure for common information described for each possible TLB (instruction, data and unified): */
+typedef struct XtHalMmuTlb {
+    u8  	va_bits;		/* 32		(number of virtual address bits) */
+    u8  	pa_bits;		/* 32		(number of physical address bits) */
+    bool	tlb_va_indexed;		/* 1	(set if TLB is indexed by virtual address) */
+    bool	tlb_va_tagged;		/* 0	(set if TLB is tagged by virtual address) */
+    bool	cache_va_indexed;	/* 1	(set if cache is indexed by virtual address) */
+    bool	cache_va_tagged;	/* 0	(set if cache is tagged by virtual address) */
+    /*bool	(whether page tables are traversed in vaddr sorted order, paddr sorted order, ...) */
+    /*u8	(set of available page attribute bits, other than cache attribute bits defined above) */
+    /*u32	(various masks for pages, MMU table/TLB entries, etc.) */
+    u8  	way_count;		/* 0 .. 8	(number of ways, a.k.a. associativities, for this TLB) */
+    XtHalMmuTlbWay *	ways[XTHAL_MMU_WAYS_MAX];	/* pointers to per-way parms for each way */
+} XtHalMmuTlb;
+
+/*  Per TLB Way (Per Associativity) Parameters  */
+typedef struct XtHalMmuTlbWay {
+     u32	index_count_log2;	/* 0 .. 4 */
+     u32	pagesz_mask;		/* 0 .. 2^pagesz_count - 1	(each bit corresponds to a size */
+					/*		defined in the Xthal_mmu_pagesz_log2[] table) */
+     u32	vpn_const_mask;
+     u32	vpn_const_value;
+     u64	ppn_const_mask;		/* future may support pa_bits > 32 */
+     u64	ppn_const_value;
+     u32	ppn_id_mask;		/* paddr bits taken directly from vaddr */
+     bool	backgnd_match;		/* 0 or 1 */
+     /*  These are defined in terms of the XTHAL_CACHE_xxx bits: */
+     u8 	fca_const_mask;		/* ITLB/UTLB only! */
+     u8 	fca_const_value;	/* ITLB/UTLB only! */
+     u8 	lca_const_mask;		/* DTLB/UTLB only! */
+     u8 	lca_const_value; 	/* DTLB/UTLB only! */
+     u8 	sca_const_mask; 	/* DTLB/UTLB only! */
+     u8 	sca_const_value; 	/* DTLB/UTLB only! */
+     /*  These define an encoding that map 5 bits in TLB and PTE entries to */
+     /*  8 bits (FCA, ITLB), 16 bits (LCA+SCA, DTLB) or 24 bits (FCA+LCA+SCA, UTLB): */
+     /*  (they may be moved to struct XtHalMmuTlb) */
+     u8		ca_bits;		/* number of bits in TLB/PTE entries for cache attributes */
+     u32 *	ca_map;			/* pointer to array of 2^ca_bits entries of FCA+LCA+SCA bits */
+} XtHalMmuTlbWay;
+
+/*
+ *  The way to determine whether protection support is present in core
+ *  is to [look at Xthal_mmu_rings ???].
+ *  Give info on memory requirements for MMU tables and other in-memory
+ *  data structures (globally, per task, base and per page, etc.) - whatever bounds can be calculated.
+ */
+
+
+/*  Default vectors:  */
+xthal_immu_fetch_miss_vector
+xthal_dmmu_load_miss_vector
+xthal_dmmu_store_miss_vector
+
+/*  Functions called when a fault is detected:  */
+typedef void (XtHalMmuFaultFunc)( unsigned vaddr, ...context... );
+/*  Or, */
+/*	a? = vaddr */
+/*	a? = context... */
+/*	PS.xxx = xxx */
+XtHalMMuFaultFunc *Xthal_immu_fetch_fault_func;
+XtHalMMuFaultFunc *Xthal_dmmu_load_fault_func;
+XtHalMMuFaultFunc *Xthal_dmmu_store_fault_func;
+
+/*  Default Handlers:  */
+/*  The user and/or kernel exception handlers may jump to these handlers to handle the relevant exceptions,
+ *  according to the value of EXCCAUSE.  The exact register state on entry to these handlers is TBD.  */
+/*  When multiple TLB entries match (hit) on the same access:  */
+xthal_immu_fetch_multihit_handler
+xthal_dmmu_load_multihit_handler
+xthal_dmmu_store_multihit_handler
+/*  Protection violations according to cache attributes, and other cache attribute mismatches:  */
+xthal_immu_fetch_attr_handler
+xthal_dmmu_load_attr_handler
+xthal_dmmu_store_attr_handler
+/*  Protection violations due to insufficient ring level:  */
+xthal_immu_fetch_priv_handler
+xthal_dmmu_load_priv_handler
+xthal_dmmu_store_priv_handler
+/*  Alignment exception handlers (if supported by the particular Xtensa MMU configuration):  */
+xthal_dmmu_load_align_handler
+xthal_dmmu_store_align_handler
+
+/*  Or, alternatively, the OS user and/or kernel exception handlers may simply jump to the
+ *  following entry points which will handle any values of EXCCAUSE not handled by the OS:  */
+xthal_user_exc_default_handler
+xthal_kernel_exc_default_handler
+
+#endif /*0*/
+
+#ifdef INCLUDE_DEPRECATED_HAL_CODE
+extern const unsigned char Xthal_have_old_exc_arch;
+extern const unsigned char Xthal_have_mmu;
+extern const unsigned int  Xthal_num_regs;
+extern const unsigned char Xthal_num_iroms;
+extern const unsigned char Xthal_num_irams;
+extern const unsigned char Xthal_num_droms;
+extern const unsigned char Xthal_num_drams;
+extern const unsigned int  Xthal_configid0;
+extern const unsigned int  Xthal_configid1;
+#endif
+
+#ifdef INCLUDE_DEPRECATED_HAL_DEBUG_CODE
+#define XTHAL_24_BIT_BREAK		0x80000000
+#define XTHAL_16_BIT_BREAK		0x40000000
+extern const unsigned short	Xthal_ill_inst_16[16];
+#define XTHAL_DEST_REG		0xf0000000	/* Mask for destination register */
+#define XTHAL_DEST_REG_INST	0x08000000	/* Branch address is in register */
+#define XTHAL_DEST_REL_INST	0x04000000	/* Branch address is relative */
+#define XTHAL_RFW_INST		0x00000800
+#define XTHAL_RFUE_INST		0x00000400
+#define XTHAL_RFI_INST		0x00000200
+#define XTHAL_RFE_INST		0x00000100
+#define XTHAL_RET_INST		0x00000080
+#define XTHAL_BREAK_INST	0x00000040
+#define XTHAL_SYSCALL_INST	0x00000020
+#define XTHAL_LOOP_END		0x00000010	/* Not set by xthal_inst_type */
+#define XTHAL_JUMP_INST		0x00000008	/* Call or jump instruction */
+#define XTHAL_BRANCH_INST	0x00000004	/* Branch instruction */
+#define XTHAL_24_BIT_INST	0x00000002
+#define XTHAL_16_BIT_INST   0x00000001
+typedef struct xthal_state {
+    unsigned	pc;
+    unsigned	ar[16];
+    unsigned	lbeg;
+    unsigned	lend;
+    unsigned	lcount;
+    unsigned	extra_ptr;
+    unsigned	cpregs_ptr[XTHAL_MAX_CPS];
+} XTHAL_STATE;
+extern unsigned int xthal_inst_type(void *addr);
+extern unsigned int xthal_branch_addr(void *addr);
+extern unsigned int xthal_get_npc(XTHAL_STATE *user_state);
+#endif /* INCLUDE_DEPRECATED_HAL_DEBUG_CODE */
+
+#ifdef __cplusplus
+}
+#endif
+#endif /*!__ASSEMBLY__ */
+
+#endif /*XTENSA_HAL_H*/
+

include/asm-xtensa/xtensa/simcall.h

···
+#ifndef SIMCALL_INCLUDED
+#define SIMCALL_INCLUDED
+
+/*
+ * THIS FILE IS GENERATED -- DO NOT MODIFY BY HAND
+ *
+ * include/asm-xtensa/xtensa/simcall.h  -  Simulator call numbers
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License.  See the file "COPYING" in the main directory of
+ * this archive for more details.
+ *
+ * Copyright (C) 2002 Tensilica Inc.
+ */
+
+
+/*
+ *  System call like services offered by the simulator host.
+ *  These are modeled after the Linux 2.4 kernel system calls
+ *  for Xtensa processors.  However not all system calls and
+ *  not all functionality of a given system call are implemented,
+ *  or necessarily have well defined or equivalent semantics in
+ *  the context of a simulation (as opposed to a Unix kernel).
+ *
+ *  These services behave largely as if they had been invoked
+ *  as a task in the simulator host's operating system
+ *  (eg. files accessed are those of the simulator host).
+ *  However, these SIMCALLs model a virtual operating system
+ *  so that various definitions, bit assignments etc
+ *  (eg. open mode bits, errno values, etc) are independent
+ *  of the host operating system used to run the simulation.
+ *  Rather these definitions are specific to the Xtensa ISS.
+ *  This way Xtensa ISA code written to use these SIMCALLs
+ *  can (in principle) be simulated on any host.
+ *
+ *  Up to 6 parameters are passed in registers a3 to a8
+ *  (note the 6th parameter isn't passed on the stack,
+ *   unlike windowed function calling conventions).
+ *  The return value is in a2.  A negative value in the
+ *  range -4096 to -1 indicates a negated error code to be
+ *  reported in errno with a return value of -1, otherwise
+ *  the value in a2 is returned as is.
+ */
+
+/* These #defines need to match what's in Xtensa/OS/vxworks/xtiss/simcalls.c */
+
+#define SYS_nop		0	/* n/a - setup; used to flush register windows */
+#define SYS_exit	1	/*x*/
+#define SYS_fork	2
+#define SYS_read	3	/*x*/
+#define SYS_write	4	/*x*/
+#define SYS_open	5	/*x*/
+#define SYS_close	6	/*x*/
+#define SYS_rename	7	/*x 38 - waitpid */
+#define SYS_creat	8	/*x*/
+#define SYS_link	9	/*x (not implemented on WIN32) */
+#define SYS_unlink	10	/*x*/
+#define SYS_execv	11	/* n/a - execve */
+#define SYS_execve	12	/* 11 - chdir */
+#define SYS_pipe	13	/* 42 - time */
+#define SYS_stat	14	/* 106 - mknod */
+#define SYS_chmod	15
+#define SYS_chown	16	/* 202 - lchown */
+#define SYS_utime	17	/* 30 - break */
+#define SYS_wait	18	/* n/a - oldstat */
+#define SYS_lseek	19	/*x*/
+#define SYS_getpid	20
+#define SYS_isatty	21	/* n/a - mount */
+#define SYS_fstat	22	/* 108 - oldumount */
+#define SYS_time	23	/* 13 - setuid */
+#define SYS_gettimeofday 24	/*x 78 - getuid (not implemented on WIN32) */
+#define SYS_times	25	/*X 43 - stime (Xtensa-specific implementation) */
+#define SYS_socket      26
+#define SYS_sendto      27
+#define SYS_recvfrom    28
+#define SYS_select_one  29      /* not compitible select, one file descriptor at the time */
+#define SYS_bind        30
+#define SYS_ioctl	31
+
+/*
+ *  Other...
+ */
+#define SYS_iss_argc      1000	/* returns value of argc */
+#define SYS_iss_argv_size 1001	/* bytes needed for argv & arg strings */
+#define SYS_iss_set_argv  1002	/* saves argv & arg strings at given addr */
+
+/*
+ * SIMCALLs for the ferret memory debugger. All are invoked by
+ * libferret.a ...  ( Xtensa/Target-Libs/ferret )
+ */
+#define SYS_ferret           1010
+#define SYS_malloc           1011
+#define SYS_free             1012
+#define SYS_more_heap        1013
+#define SYS_no_heap          1014
+
+
+/*
+ *  Extra SIMCALLs for GDB:
+ */
+#define SYS_gdb_break         -1	/* invoked by XTOS on user exceptions if EPC points
+					   to a break.n/break, regardless of cause! */
+#define SYS_xmon_out          -2	/* invoked by XMON: ... */
+#define SYS_xmon_in           -3	/* invoked by XMON: ... */
+#define SYS_xmon_flush        -4	/* invoked by XMON: ... */
+#define SYS_gdb_abort         -5	/* invoked by XTOS in _xtos_panic() */
+#define SYS_gdb_illegal_inst  -6	/* invoked by XTOS for illegal instructions (too deeply) */
+#define SYS_xmon_init         -7	/* invoked by XMON: ... */
+#define SYS_gdb_enter_sktloop -8	/* invoked by XTOS on debug exceptions */
+
+/*
+ *  SIMCALLs for vxWorks xtiss BSP:
+ */
+#define SYS_setup_ppp_pipes   -83
+#define SYS_log_msg           -84
+
+/*
+ *  Test SIMCALLs:
+ */
+#define SYS_test_write_state  -100
+#define SYS_test_read_state   -101
+
+/*
+ * SYS_select_one specifiers
+ */
+#define  XTISS_SELECT_ONE_READ    1
+#define  XTISS_SELECT_ONE_WRITE   2
+#define  XTISS_SELECT_ONE_EXCEPT  3
+
+#endif /* !SIMCALL_INCLUDED */

include/asm-xtensa/xtensa/xt2000-uart.h

···
+#ifndef _uart_h_included_
+#define _uart_h_included_
+
+/*
+ * THIS FILE IS GENERATED -- DO NOT MODIFY BY HAND
+ *
+ * include/asm-xtensa/xtensa/xt2000-uart.h -- NatSemi PC16552D DUART
+ * definitions
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2002 Tensilica Inc.
+ */
+
+
+#include <xtensa/xt2000.h>
+
+
+/* 16550 UART DEVICE REGISTERS
+   The XT2000 board aligns each register to a 32-bit word but the UART device only uses
+   one byte of the word, which is the least-significant byte regardless of the
+   endianness of the core (ie. byte offset 0 for little-endian and 3 for big-endian).
+   So if using word accesses then endianness doesn't matter.
+   The macros provided here do that.
+*/
+struct uart_dev_s {
+  union {
+    unsigned int rxb;	/* DLAB=0: receive buffer, read-only */
+    unsigned int txb;	/* DLAB=0: transmit buffer, write-only */
+    unsigned int dll;	/* DLAB=1: divisor, least-significant byte latch (was write-only?) */
+  } w0;
+  union {
+    unsigned int ier;	/* DLAB=0: interrupt-enable register (was write-only?) */
+    unsigned int dlm;	/* DLAB=1: divisor, most-significant byte latch (was write-only?) */
+  } w1;
+
+  union {
+    unsigned int isr;	/* DLAB=0: interrupt status register, read-only */
+    unsigned int fcr;	/* DLAB=0: FIFO control register, write-only */
+    unsigned int afr;	/* DLAB=1: alternate function register */
+  } w2;
+
+  unsigned int lcr;	/* line control-register, write-only */
+  unsigned int mcr;	/* modem control-regsiter, write-only */
+  unsigned int lsr;	/* line status register, read-only */
+  unsigned int msr;	/* modem status register, read-only */
+  unsigned int scr;	/* scratch regsiter, read/write */
+};
+
+#define _RXB(u) ((u)->w0.rxb)
+#define _TXB(u) ((u)->w0.txb)
+#define _DLL(u) ((u)->w0.dll)
+#define _IER(u) ((u)->w1.ier)
+#define _DLM(u) ((u)->w1.dlm)
+#define _ISR(u) ((u)->w2.isr)
+#define _FCR(u) ((u)->w2.fcr)
+#define _AFR(u) ((u)->w2.afr)
+#define _LCR(u) ((u)->lcr)
+#define _MCR(u) ((u)->mcr)
+#define _LSR(u) ((u)->lsr)
+#define _MSR(u) ((u)->msr)
+#define _SCR(u) ((u)->scr)
+
+typedef volatile struct uart_dev_s uart_dev_t;
+
+/* IER bits */
+#define RCVR_DATA_REG_INTENABLE 0x01
+#define XMIT_HOLD_REG_INTENABLE    0x02
+#define RCVR_STATUS_INTENABLE   0x04
+#define MODEM_STATUS_INTENABLE     0x08
+
+/* FCR bits */
+#define _FIFO_ENABLE      0x01
+#define RCVR_FIFO_RESET  0x02
+#define XMIT_FIFO_RESET  0x04
+#define DMA_MODE_SELECT  0x08
+#define RCVR_TRIGGER_LSB 0x40
+#define RCVR_TRIGGER_MSB 0x80
+
+/* AFR bits */
+#define AFR_CONC_WRITE	0x01
+#define AFR_BAUDOUT_SEL	0x02
+#define AFR_RXRDY_SEL	0x04
+
+/* ISR bits */
+#define INT_STATUS(r)   ((r)&1)
+#define INT_PRIORITY(r) (((r)>>1)&0x7)
+
+/* LCR bits */
+#define WORD_LENGTH(n)  (((n)-5)&0x3)
+#define STOP_BIT_ENABLE 0x04
+#define PARITY_ENABLE   0x08
+#define EVEN_PARITY     0x10
+#define FORCE_PARITY    0x20
+#define XMIT_BREAK      0x40
+#define DLAB_ENABLE     0x80
+
+/* MCR bits */
+#define _DTR 0x01
+#define _RTS 0x02
+#define _OP1 0x04
+#define _OP2 0x08
+#define LOOP_BACK 0x10
+
+/* LSR Bits */
+#define RCVR_DATA_READY 0x01
+#define OVERRUN_ERROR   0x02
+#define PARITY_ERROR    0x04
+#define FRAMING_ERROR   0x08
+#define BREAK_INTERRUPT 0x10
+#define XMIT_HOLD_EMPTY 0x20
+#define XMIT_EMPTY      0x40
+#define FIFO_ERROR      0x80
+#define RCVR_READY(u)   (_LSR(u)&RCVR_DATA_READY)
+#define XMIT_READY(u)   (_LSR(u)&XMIT_HOLD_EMPTY)
+
+/* MSR bits */
+#define _RDR       0x01
+#define DELTA_DSR 0x02
+#define DELTA_RI  0x04
+#define DELTA_CD  0x08
+#define _CTS       0x10
+#define _DSR       0x20
+#define _RI        0x40
+#define _CD        0x80
+
+/* prototypes */
+void uart_init( uart_dev_t *u, int bitrate );
+void uart_out( uart_dev_t *u, char c );
+void uart_puts( uart_dev_t *u, char *s );
+char uart_in( uart_dev_t *u );
+void uart_enable_rcvr_int( uart_dev_t *u );
+void uart_disable_rcvr_int( uart_dev_t *u );
+
+#ifdef DUART16552_1_VADDR
+/*  DUART present.  */
+#define DUART_1_BASE	(*(uart_dev_t*)DUART16552_1_VADDR)
+#define DUART_2_BASE	(*(uart_dev_t*)DUART16552_2_VADDR)
+#define UART1_PUTS(s)	uart_puts( &DUART_1_BASE, s )
+#define UART2_PUTS(s)	uart_puts( &DUART_2_BASE, s )
+#else
+/*  DUART not configured, use dummy placeholders to allow compiles to work.  */
+#define DUART_1_BASE	(*(uart_dev_t*)0)
+#define DUART_2_BASE	(*(uart_dev_t*)0)
+#define UART1_PUTS(s)
+#define UART2_PUTS(s)
+#endif
+
+/*  Compute 16-bit divisor for baudrate generator, with rounding:  */
+#define DUART_DIVISOR(crystal,speed)	(((crystal)/16 + (speed)/2)/(speed))
+
+#endif /*_uart_h_included_*/
+

include/asm-xtensa/xtensa/xt2000.h

···
+#ifndef _INC_XT2000_H_
+#define _INC_XT2000_H_
+
+/*
+ * THIS FILE IS GENERATED -- DO NOT MODIFY BY HAND
+ *
+ * include/asm-xtensa/xtensa/xt2000.h - Definitions specific to the
+ * Tensilica XT2000 Emulation Board
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2002 Tensilica Inc.
+ */
+
+
+#include <xtensa/config/core.h>
+#include <xtensa/config/system.h>
+
+
+/*
+ *  Default assignment of XT2000 devices to external interrupts.
+ */
+
+/*  Ethernet interrupt:  */
+#ifdef XCHAL_EXTINT3_NUM
+#define SONIC83934_INTNUM	XCHAL_EXTINT3_NUM
+#define SONIC83934_INTLEVEL	XCHAL_EXTINT3_LEVEL
+#define SONIC83934_INTMASK	XCHAL_EXTINT3_MASK
+#else
+#define SONIC83934_INTMASK	0
+#endif
+
+/*  DUART channel 1 interrupt (P1 - console):  */
+#ifdef XCHAL_EXTINT4_NUM
+#define DUART16552_1_INTNUM	XCHAL_EXTINT4_NUM
+#define DUART16552_1_INTLEVEL	XCHAL_EXTINT4_LEVEL
+#define DUART16552_1_INTMASK	XCHAL_EXTINT4_MASK
+#else
+#define DUART16552_1_INTMASK	0
+#endif
+
+/*  DUART channel 2 interrupt (P2 - 2nd serial port):  */
+#ifdef XCHAL_EXTINT5_NUM
+#define DUART16552_2_INTNUM	XCHAL_EXTINT5_NUM
+#define DUART16552_2_INTLEVEL	XCHAL_EXTINT5_LEVEL
+#define DUART16552_2_INTMASK	XCHAL_EXTINT5_MASK
+#else
+#define DUART16552_2_INTMASK	0
+#endif
+
+/*  FPGA-combined PCI/etc interrupts:  */
+#ifdef XCHAL_EXTINT6_NUM
+#define XT2000_FPGAPCI_INTNUM	XCHAL_EXTINT6_NUM
+#define XT2000_FPGAPCI_INTLEVEL	XCHAL_EXTINT6_LEVEL
+#define XT2000_FPGAPCI_INTMASK	XCHAL_EXTINT6_MASK
+#else
+#define XT2000_FPGAPCI_INTMASK	0
+#endif
+
+
+
+/*
+ *  Device addresses.
+ *
+ *  Note:  for endianness-independence, use 32-bit loads and stores for all
+ *  register accesses to Ethernet, DUART and LED devices.  Undefined bits
+ *  may need to be masked out if needed when reading if the actual register
+ *  size is smaller than 32 bits.
+ *
+ *  Note:  XT2000 bus byte lanes are defined in terms of msbyte and lsbyte
+ *  relative to the processor.  So 32-bit registers are accessed consistently
+ *  from both big and little endian processors.  However, this means byte
+ *  sequences are not consistent between big and little endian processors.
+ *  This is fine for RAM, and for ROM if ROM is created for a specific
+ *  processor (and thus has correct byte sequences).  However this may be
+ *  unexpected for Flash, which might contain a file-system that one wants
+ *  to use for multiple processor configurations (eg. the Flash might contain
+ *  the Ethernet card's address, endianness-independent application data, etc).
+ *  That is, byte sequences written in Flash by a core of a given endianness
+ *  will be byte-swapped when seen by a core of the other endianness.
+ *  Someone implementing an endianness-independent Flash file system will
+ *  likely handle this byte-swapping issue in the Flash driver software.
+ */
+
+#define DUART16552_XTAL_FREQ	18432000	/* crystal frequency in Hz */
+#define XTBOARD_FLASH_MAXSIZE	0x4000000	/* 64 MB (max; depends on what is socketed!) */
+#define XTBOARD_EPROM_MAXSIZE	0x0400000	/* 4 MB (max; depends on what is socketed!) */
+#define XTBOARD_EEPROM_MAXSIZE	0x0080000	/* 512 kB (max; depends on what is socketed!) */
+#define XTBOARD_ASRAM_SIZE	0x0100000	/* 1 MB */
+#define XTBOARD_PCI_MEM_SIZE	0x8000000	/* 128 MB (allocated) */
+#define XTBOARD_PCI_IO_SIZE	0x1000000	/* 16 MB (allocated) */
+
+#ifdef XSHAL_IOBLOCK_BYPASS_PADDR
+/*  PCI memory space:  */
+# define XTBOARD_PCI_MEM_PADDR	(XSHAL_IOBLOCK_BYPASS_PADDR+0x0000000)
+/*  Socketed Flash (eg. 2 x 16-bit devices):  */
+# define XTBOARD_FLASH_PADDR	(XSHAL_IOBLOCK_BYPASS_PADDR+0x8000000)
+/*  PCI I/O space:  */
+# define XTBOARD_PCI_IO_PADDR	(XSHAL_IOBLOCK_BYPASS_PADDR+0xC000000)
+/*  V3 PCI interface chip register/config space:  */
+# define XTBOARD_V3PCI_PADDR	(XSHAL_IOBLOCK_BYPASS_PADDR+0xD000000)
+/*  Bus Interface registers:  */
+# define XTBOARD_BUSINT_PADDR	(XSHAL_IOBLOCK_BYPASS_PADDR+0xD010000)
+/*  FPGA registers:  */
+# define XT2000_FPGAREGS_PADDR	(XSHAL_IOBLOCK_BYPASS_PADDR+0xD020000)
+/*  SONIC SN83934 Ethernet controller/transceiver:  */
+# define SONIC83934_PADDR	(XSHAL_IOBLOCK_BYPASS_PADDR+0xD030000)
+/*  8-character bitmapped LED display:  */
+# define XTBOARD_LED_PADDR	(XSHAL_IOBLOCK_BYPASS_PADDR+0xD040000)
+/*  National-Semi PC16552D DUART:  */
+# define DUART16552_1_PADDR	(XSHAL_IOBLOCK_BYPASS_PADDR+0xD050020)	/* channel 1 (P1 - console) */
+# define DUART16552_2_PADDR	(XSHAL_IOBLOCK_BYPASS_PADDR+0xD050000)	/* channel 2 (P2) */
+/*  Asynchronous Static RAM:  */
+# define XTBOARD_ASRAM_PADDR	(XSHAL_IOBLOCK_BYPASS_PADDR+0xD400000)
+/*  8-bit EEPROM:  */
+# define XTBOARD_EEPROM_PADDR	(XSHAL_IOBLOCK_BYPASS_PADDR+0xD600000)
+/*  2 x 16-bit EPROMs:  */
+# define XTBOARD_EPROM_PADDR	(XSHAL_IOBLOCK_BYPASS_PADDR+0xD800000)
+#endif /* XSHAL_IOBLOCK_BYPASS_PADDR */
+
+/*  These devices might be accessed cached:  */
+#ifdef XSHAL_IOBLOCK_CACHED_PADDR
+# define XTBOARD_PCI_MEM_CACHED_PADDR	(XSHAL_IOBLOCK_CACHED_PADDR+0x0000000)
+# define XTBOARD_FLASH_CACHED_PADDR	(XSHAL_IOBLOCK_CACHED_PADDR+0x8000000)
+# define XTBOARD_ASRAM_CACHED_PADDR	(XSHAL_IOBLOCK_CACHED_PADDR+0xD400000)
+# define XTBOARD_EEPROM_CACHED_PADDR	(XSHAL_IOBLOCK_CACHED_PADDR+0xD600000)
+# define XTBOARD_EPROM_CACHED_PADDR	(XSHAL_IOBLOCK_CACHED_PADDR+0xD800000)
+#endif /* XSHAL_IOBLOCK_CACHED_PADDR */
+
+
+/***  Same thing over again, this time with virtual addresses:  ***/
+
+#ifdef XSHAL_IOBLOCK_BYPASS_VADDR
+/*  PCI memory space:  */
+# define XTBOARD_PCI_MEM_VADDR	(XSHAL_IOBLOCK_BYPASS_VADDR+0x0000000)
+/*  Socketed Flash (eg. 2 x 16-bit devices):  */
+# define XTBOARD_FLASH_VADDR	(XSHAL_IOBLOCK_BYPASS_VADDR+0x8000000)
+/*  PCI I/O space:  */
+# define XTBOARD_PCI_IO_VADDR	(XSHAL_IOBLOCK_BYPASS_VADDR+0xC000000)
+/*  V3 PCI interface chip register/config space:  */
+# define XTBOARD_V3PCI_VADDR	(XSHAL_IOBLOCK_BYPASS_VADDR+0xD000000)
+/*  Bus Interface registers:  */
+# define XTBOARD_BUSINT_VADDR	(XSHAL_IOBLOCK_BYPASS_VADDR+0xD010000)
+/*  FPGA registers:  */
+# define XT2000_FPGAREGS_VADDR	(XSHAL_IOBLOCK_BYPASS_VADDR+0xD020000)
+/*  SONIC SN83934 Ethernet controller/transceiver:  */
+# define SONIC83934_VADDR	(XSHAL_IOBLOCK_BYPASS_VADDR+0xD030000)
+/*  8-character bitmapped LED display:  */
+# define XTBOARD_LED_VADDR	(XSHAL_IOBLOCK_BYPASS_VADDR+0xD040000)
+/*  National-Semi PC16552D DUART:  */
+# define DUART16552_1_VADDR	(XSHAL_IOBLOCK_BYPASS_VADDR+0xD050020)	/* channel 1 (P1 - console) */
+# define DUART16552_2_VADDR	(XSHAL_IOBLOCK_BYPASS_VADDR+0xD050000)	/* channel 2 (P2) */
+/*  Asynchronous Static RAM:  */
+# define XTBOARD_ASRAM_VADDR	(XSHAL_IOBLOCK_BYPASS_VADDR+0xD400000)
+/*  8-bit EEPROM:  */
+# define XTBOARD_EEPROM_VADDR	(XSHAL_IOBLOCK_BYPASS_VADDR+0xD600000)
+/*  2 x 16-bit EPROMs:  */
+# define XTBOARD_EPROM_VADDR	(XSHAL_IOBLOCK_BYPASS_VADDR+0xD800000)
+#endif /* XSHAL_IOBLOCK_BYPASS_VADDR */
+
+/*  These devices might be accessed cached:  */
+#ifdef XSHAL_IOBLOCK_CACHED_VADDR
+# define XTBOARD_PCI_MEM_CACHED_VADDR	(XSHAL_IOBLOCK_CACHED_VADDR+0x0000000)
+# define XTBOARD_FLASH_CACHED_VADDR	(XSHAL_IOBLOCK_CACHED_VADDR+0x8000000)
+# define XTBOARD_ASRAM_CACHED_VADDR	(XSHAL_IOBLOCK_CACHED_VADDR+0xD400000)
+# define XTBOARD_EEPROM_CACHED_VADDR	(XSHAL_IOBLOCK_CACHED_VADDR+0xD600000)
+# define XTBOARD_EPROM_CACHED_VADDR	(XSHAL_IOBLOCK_CACHED_VADDR+0xD800000)
+#endif /* XSHAL_IOBLOCK_CACHED_VADDR */
+
+
+/*  System ROM:  */
+#define XTBOARD_ROM_SIZE		XSHAL_ROM_SIZE
+#ifdef XSHAL_ROM_VADDR
+#define XTBOARD_ROM_VADDR		XSHAL_ROM_VADDR
+#endif
+#ifdef XSHAL_ROM_PADDR
+#define XTBOARD_ROM_PADDR		XSHAL_ROM_PADDR
+#endif
+
+/*  System RAM:  */
+#define XTBOARD_RAM_SIZE		XSHAL_RAM_SIZE
+#ifdef XSHAL_RAM_VADDR
+#define XTBOARD_RAM_VADDR		XSHAL_RAM_VADDR
+#endif
+#ifdef XSHAL_RAM_PADDR
+#define XTBOARD_RAM_PADDR		XSHAL_RAM_PADDR
+#endif
+#define XTBOARD_RAM_BYPASS_VADDR	XSHAL_RAM_BYPASS_VADDR
+#define XTBOARD_RAM_BYPASS_PADDR	XSHAL_RAM_BYPASS_PADDR
+
+
+
+/*
+ *  Things that depend on device addresses.
+ */
+
+
+#define XTBOARD_CACHEATTR_WRITEBACK	XSHAL_XT2000_CACHEATTR_WRITEBACK
+#define XTBOARD_CACHEATTR_WRITEALLOC	XSHAL_XT2000_CACHEATTR_WRITEALLOC
+#define XTBOARD_CACHEATTR_WRITETHRU	XSHAL_XT2000_CACHEATTR_WRITETHRU
+#define XTBOARD_CACHEATTR_BYPASS	XSHAL_XT2000_CACHEATTR_BYPASS
+#define XTBOARD_CACHEATTR_DEFAULT	XSHAL_XT2000_CACHEATTR_DEFAULT
+
+#define XTBOARD_BUSINT_PIPE_REGIONS	XSHAL_XT2000_PIPE_REGIONS
+#define XTBOARD_BUSINT_SDRAM_REGIONS	XSHAL_XT2000_SDRAM_REGIONS
+
+
+
+/*
+ *  BusLogic (FPGA) registers.
+ *  All these registers are normally accessed using 32-bit loads/stores.
+ */
+
+/*  Register offsets:  */
+#define XT2000_DATECD_OFS	0x00	/* date code (read-only) */
+#define XT2000_STSREG_OFS	0x04	/* status (read-only) */
+#define XT2000_SYSLED_OFS	0x08	/* system LED */
+#define XT2000_WRPROT_OFS	0x0C	/* write protect */
+#define XT2000_SWRST_OFS	0x10	/* software reset */
+#define XT2000_SYSRST_OFS	0x14	/* system (peripherals) reset */
+#define XT2000_IMASK_OFS	0x18	/* interrupt mask */
+#define XT2000_ISTAT_OFS	0x1C	/* interrupt status */
+#define XT2000_V3CFG_OFS	0x20	/* V3 config (V320 PCI) */
+
+/*  Physical register addresses:  */
+#ifdef XT2000_FPGAREGS_PADDR
+#define XT2000_DATECD_PADDR	(XT2000_FPGAREGS_PADDR+XT2000_DATECD_OFS)
+#define XT2000_STSREG_PADDR	(XT2000_FPGAREGS_PADDR+XT2000_STSREG_OFS)
+#define XT2000_SYSLED_PADDR	(XT2000_FPGAREGS_PADDR+XT2000_SYSLED_OFS)
+#define XT2000_WRPROT_PADDR	(XT2000_FPGAREGS_PADDR+XT2000_WRPROT_OFS)
+#define XT2000_SWRST_PADDR	(XT2000_FPGAREGS_PADDR+XT2000_SWRST_OFS)
+#define XT2000_SYSRST_PADDR	(XT2000_FPGAREGS_PADDR+XT2000_SYSRST_OFS)
+#define XT2000_IMASK_PADDR	(XT2000_FPGAREGS_PADDR+XT2000_IMASK_OFS)
+#define XT2000_ISTAT_PADDR	(XT2000_FPGAREGS_PADDR+XT2000_ISTAT_OFS)
+#define XT2000_V3CFG_PADDR	(XT2000_FPGAREGS_PADDR+XT2000_V3CFG_OFS)
+#endif
+
+/*  Virtual register addresses:  */
+#ifdef XT2000_FPGAREGS_VADDR
+#define XT2000_DATECD_VADDR	(XT2000_FPGAREGS_VADDR+XT2000_DATECD_OFS)
+#define XT2000_STSREG_VADDR	(XT2000_FPGAREGS_VADDR+XT2000_STSREG_OFS)
+#define XT2000_SYSLED_VADDR	(XT2000_FPGAREGS_VADDR+XT2000_SYSLED_OFS)
+#define XT2000_WRPROT_VADDR	(XT2000_FPGAREGS_VADDR+XT2000_WRPROT_OFS)
+#define XT2000_SWRST_VADDR	(XT2000_FPGAREGS_VADDR+XT2000_SWRST_OFS)
+#define XT2000_SYSRST_VADDR	(XT2000_FPGAREGS_VADDR+XT2000_SYSRST_OFS)
+#define XT2000_IMASK_VADDR	(XT2000_FPGAREGS_VADDR+XT2000_IMASK_OFS)
+#define XT2000_ISTAT_VADDR	(XT2000_FPGAREGS_VADDR+XT2000_ISTAT_OFS)
+#define XT2000_V3CFG_VADDR	(XT2000_FPGAREGS_VADDR+XT2000_V3CFG_OFS)
+/*  Register access (for C code):  */
+#define XT2000_DATECD_REG	(*(volatile unsigned*) XT2000_DATECD_VADDR)
+#define XT2000_STSREG_REG	(*(volatile unsigned*) XT2000_STSREG_VADDR)
+#define XT2000_SYSLED_REG	(*(volatile unsigned*) XT2000_SYSLED_VADDR)
+#define XT2000_WRPROT_REG	(*(volatile unsigned*) XT2000_WRPROT_VADDR)
+#define XT2000_SWRST_REG	(*(volatile unsigned*) XT2000_SWRST_VADDR)
+#define XT2000_SYSRST_REG	(*(volatile unsigned*) XT2000_SYSRST_VADDR)
+#define XT2000_IMASK_REG	(*(volatile unsigned*) XT2000_IMASK_VADDR)
+#define XT2000_ISTAT_REG	(*(volatile unsigned*) XT2000_ISTAT_VADDR)
+#define XT2000_V3CFG_REG	(*(volatile unsigned*) XT2000_V3CFG_VADDR)
+#endif
+
+/*  DATECD (date code) bit fields:  */
+
+/*  BCD-coded month (01..12):  */
+#define XT2000_DATECD_MONTH_SHIFT	24
+#define XT2000_DATECD_MONTH_BITS	8
+#define XT2000_DATECD_MONTH_MASK	0xFF000000
+/*  BCD-coded day (01..31):  */
+#define XT2000_DATECD_DAY_SHIFT		16
+#define XT2000_DATECD_DAY_BITS		8
+#define XT2000_DATECD_DAY_MASK		0x00FF0000
+/*  BCD-coded year (2001..9999):  */
+#define XT2000_DATECD_YEAR_SHIFT	0
+#define XT2000_DATECD_YEAR_BITS		16
+#define XT2000_DATECD_YEAR_MASK		0x0000FFFF
+
+/*  STSREG (status) bit fields:  */
+
+/*  Switch SW3 setting bit fields (0=off/up, 1=on/down):  */
+#define XT2000_STSREG_SW3_SHIFT		0
+#define XT2000_STSREG_SW3_BITS		4
+#define XT2000_STSREG_SW3_MASK		0x0000000F
+/*  Boot-select bits of switch SW3:  */
+#define XT2000_STSREG_BOOTSEL_SHIFT	0
+#define XT2000_STSREG_BOOTSEL_BITS	2
+#define XT2000_STSREG_BOOTSEL_MASK	0x00000003
+/*  Boot-select values:  */
+#define XT2000_STSREG_BOOTSEL_FLASH	0
+#define XT2000_STSREG_BOOTSEL_EPROM16	1
+#define XT2000_STSREG_BOOTSEL_PROM8	2
+#define XT2000_STSREG_BOOTSEL_ASRAM	3
+/*  User-defined bits of switch SW3:  */
+#define XT2000_STSREG_SW3_2_SHIFT	2
+#define XT2000_STSREG_SW3_2_MASK	0x00000004
+#define XT2000_STSREG_SW3_3_SHIFT	3
+#define XT2000_STSREG_SW3_3_MASK	0x00000008
+
+/*  SYSLED (system LED) bit fields:  */
+
+/*  LED control bit (0=off, 1=on):  */
+#define XT2000_SYSLED_LEDON_SHIFT	0
+#define XT2000_SYSLED_LEDON_MASK	0x00000001
+
+/*  WRPROT (write protect) bit fields (0=writable, 1=write-protected [default]):  */
+
+/*  Flash write protect:  */
+#define XT2000_WRPROT_FLWP_SHIFT	0
+#define XT2000_WRPROT_FLWP_MASK		0x00000001
+/*  Reserved but present write protect bits:  */
+#define XT2000_WRPROT_WRP_SHIFT		1
+#define XT2000_WRPROT_WRP_BITS		7
+#define XT2000_WRPROT_WRP_MASK		0x000000FE
+
+/*  SWRST (software reset; allows s/w to generate power-on equivalent reset):  */
+
+/*  Software reset bits:  */
+#define XT2000_SWRST_SWR_SHIFT		0
+#define XT2000_SWRST_SWR_BITS		16
+#define XT2000_SWRST_SWR_MASK		0x0000FFFF
+/*  Software reset value -- writing this value resets the board:  */
+#define XT2000_SWRST_RESETVALUE		0x0000DEAD
+
+/*  SYSRST (system reset; controls reset of individual peripherals):  */
+
+/*  All-device reset:  */
+#define XT2000_SYSRST_ALL_SHIFT		0
+#define XT2000_SYSRST_ALL_BITS		4
+#define XT2000_SYSRST_ALL_MASK		0x0000000F
+/*  HDSP-2534 LED display reset (1=reset, 0=nothing):  */
+#define XT2000_SYSRST_LED_SHIFT		0
+#define XT2000_SYSRST_LED_MASK		0x00000001
+/*  Sonic DP83934 Ethernet controller reset (1=reset, 0=nothing):  */
+#define XT2000_SYSRST_SONIC_SHIFT	1
+#define XT2000_SYSRST_SONIC_MASK	0x00000002
+/*  DP16552 DUART reset (1=reset, 0=nothing):  */
+#define XT2000_SYSRST_DUART_SHIFT	2
+#define XT2000_SYSRST_DUART_MASK	0x00000004
+/*  V3 V320 PCI bridge controller reset (1=reset, 0=nothing):  */
+#define XT2000_SYSRST_V3_SHIFT		3
+#define XT2000_SYSRST_V3_MASK		0x00000008
+
+/*  IMASK (interrupt mask; 0=disable, 1=enable):  */
+/*  ISTAT (interrupt status; 0=inactive, 1=pending):  */
+
+/*  PCI INTP interrupt:  */
+#define XT2000_INTMUX_PCI_INTP_SHIFT	2
+#define XT2000_INTMUX_PCI_INTP_MASK	0x00000004
+/*  PCI INTS interrupt:  */
+#define XT2000_INTMUX_PCI_INTS_SHIFT	3
+#define XT2000_INTMUX_PCI_INTS_MASK	0x00000008
+/*  PCI INTD interrupt:  */
+#define XT2000_INTMUX_PCI_INTD_SHIFT	4
+#define XT2000_INTMUX_PCI_INTD_MASK	0x00000010
+/*  V320 PCI controller interrupt:  */
+#define XT2000_INTMUX_V3_SHIFT		5
+#define XT2000_INTMUX_V3_MASK		0x00000020
+/*  PCI ENUM interrupt:  */
+#define XT2000_INTMUX_PCI_ENUM_SHIFT	6
+#define XT2000_INTMUX_PCI_ENUM_MASK	0x00000040
+/*  PCI DEG interrupt:  */
+#define XT2000_INTMUX_PCI_DEG_SHIFT	7
+#define XT2000_INTMUX_PCI_DEG_MASK	0x00000080
+
+/*  V3CFG (V3 config, V320 PCI controller):  */
+
+/*  V3 address control (0=pass-thru, 1=V3 address bits 31:28 set to 4'b0001 [default]):  */
+#define XT2000_V3CFG_V3ADC_SHIFT	0
+#define XT2000_V3CFG_V3ADC_MASK		0x00000001
+
+/* I2C Devices */
+
+#define	XT2000_I2C_RTC_ID		0x68
+#define	XT2000_I2C_NVRAM0_ID		0x56	/* 1st 256 byte block */
+#define	XT2000_I2C_NVRAM1_ID		0x57	/* 2nd 256 byte block */
+
+/*  NVRAM Board Info structure:  */
+
+#define XT2000_NVRAM_SIZE		512
+
+#define XT2000_NVRAM_BINFO_START	0x100
+#define XT2000_NVRAM_BINFO_SIZE		0x20
+#define XT2000_NVRAM_BINFO_VERSION	0x10	/* version 1.0 */
+#if 0
+#define XT2000_NVRAM_BINFO_VERSION_OFFSET	0x00
+#define XT2000_NVRAM_BINFO_VERSION_SIZE			0x1
+#define XT2000_NVRAM_BINFO_ETH_ADDR_OFFSET	0x02
+#define XT2000_NVRAM_BINFO_ETH_ADDR_SIZE		0x6
+#define XT2000_NVRAM_BINFO_SN_OFFSET		0x10
+#define XT2000_NVRAM_BINFO_SN_SIZE			0xE
+#define	XT2000_NVRAM_BINFO_CRC_OFFSET		0x1E
+#define	XT2000_NVRAM_BINFO_CRC_SIZE			0x2
+#endif /*0*/
+
+#if !defined(__ASSEMBLY__) && !defined(_NOCLANGUAGE)
+typedef struct xt2000_nvram_binfo {
+    unsigned char	version;
+    unsigned char	reserved1;
+    unsigned char	eth_addr[6];
+    unsigned char	reserved8[8];
+    unsigned char	serialno[14];
+    unsigned char	crc[2];		/* 16-bit CRC */
+} xt2000_nvram_binfo;
+#endif /*!__ASSEMBLY__ && !_NOCLANGUAGE*/
+
+
+#endif /*_INC_XT2000_H_*/
+

include/asm-xtensa/xtensa/xtboard.h

···
+#ifndef _xtboard_h_included_
+#define _xtboard_h_included_
+
+/*
+ * THIS FILE IS GENERATED -- DO NOT MODIFY BY HAND
+ *
+ *  xtboard.h  --  Routines for getting useful information from the board.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2002 Tensilica Inc.
+ */
+
+
+#include <xtensa/xt2000.h>
+
+#define	XTBOARD_RTC_ERROR	-1
+#define	XTBOARD_RTC_STOPPED	-2
+
+
+/*  xt2000-i2cdev.c:  */
+typedef void XtboardDelayFunc( unsigned );
+extern XtboardDelayFunc* xtboard_set_nsdelay_func( XtboardDelayFunc *delay_fn );
+extern int xtboard_i2c_read (unsigned id, unsigned char *buf, unsigned addr, unsigned size);
+extern int xtboard_i2c_write(unsigned id, unsigned char *buf, unsigned addr, unsigned size);
+extern int xtboard_i2c_wait_nvram_ack(unsigned id, unsigned swtimer);
+
+/*  xtboard.c:  */
+extern int xtboard_nvram_read (unsigned addr, unsigned len, unsigned char *buf);
+extern int xtboard_nvram_write(unsigned addr, unsigned len, unsigned char *buf);
+extern int xtboard_nvram_binfo_read (xt2000_nvram_binfo *buf);
+extern int xtboard_nvram_binfo_write(xt2000_nvram_binfo *buf);
+extern int xtboard_nvram_binfo_valid(xt2000_nvram_binfo *buf);
+extern int xtboard_ethermac_get(unsigned char *buf);
+extern int xtboard_ethermac_set(unsigned char *buf);
+
+/*+*----------------------------------------------------------------------------
+/ Function: xtboard_get_rtc_time
+/
+/ Description:  Get time stored in real-time clock.
+/
+/ Returns: time in seconds stored in real-time clock.
+/-**----------------------------------------------------------------------------*/
+
+extern unsigned xtboard_get_rtc_time(void);
+
+/*+*----------------------------------------------------------------------------
+/ Function: xtboard_set_rtc_time
+/
+/ Description:  Set time stored in real-time clock.
+/
+/ Parameters: 	time -- time in seconds to store to real-time clock
+/
+/ Returns: 0 on success, xtboard_i2c_write() error code otherwise.
+/-**----------------------------------------------------------------------------*/
+
+extern int xtboard_set_rtc_time(unsigned time);
+
+
+/*  xtfreq.c:  */
+/*+*----------------------------------------------------------------------------
+/ Function: xtboard_measure_sys_clk
+/
+/ Description:  Get frequency of system clock.
+/
+/ Parameters:	none
+/
+/ Returns: frequency of system clock.
+/-**----------------------------------------------------------------------------*/
+
+extern unsigned xtboard_measure_sys_clk(void);
+
+
+#if 0	/* old stuff from xtboard.c: */
+
+/*+*----------------------------------------------------------------------------
+/ Function: xtboard_nvram valid
+/
+/ Description:  Determines if data in NVRAM is valid.
+/
+/ Parameters:	delay -- 10us delay function
+/
+/ Returns: 1 if NVRAM is valid, 0 otherwise
+/-**----------------------------------------------------------------------------*/
+
+extern unsigned xtboard_nvram_valid(void (*delay)( void ));
+
+/*+*----------------------------------------------------------------------------
+/ Function: xtboard_get_nvram_contents
+/
+/ Description:  Returns contents of NVRAM.
+/
+/ Parameters: 	buf -- buffer to NVRAM contents.
+/		delay -- 10us delay function
+/
+/ Returns: 1 if NVRAM is valid, 0 otherwise
+/-**----------------------------------------------------------------------------*/
+
+extern unsigned xtboard_get_nvram_contents(unsigned char *buf, void (*delay)( void ));
+
+/*+*----------------------------------------------------------------------------
+/ Function: xtboard_get_ether_addr
+/
+/ Description:  Returns ethernet address of board.
+/
+/ Parameters: 	buf -- buffer to store ethernet address
+/		delay -- 10us delay function
+/
+/ Returns: nothing.
+/-**----------------------------------------------------------------------------*/
+
+extern void xtboard_get_ether_addr(unsigned char *buf, void (*delay)( void ));
+
+#endif /*0*/
+
+
+#endif /*_xtboard_h_included_*/
+