ppc64: Use the merged lmb routines

The only real change here is that lmb_enforce_memory_limit now takes
the memory_limit as a parameter instead of as a global variable.

Signed-off-by: Paul Mackerras <[e-mail]>

arch/ppc64/kernel/Makefile

···
 			align.o semaphore.o bitops.o pacaData.o \
 			udbg.o binfmt_elf32.o sys_ppc32.o ioctl32.o \
 			ptrace32.o signal32.o rtc.o init_task.o \
-			lmb.o cputable.o cpu_setup_power4.o \
+			cputable.o cpu_setup_power4.o \
 			iommu.o sysfs.o vdso.o pmc.o firmware.o prom.o
 obj-y += vdso32/ vdso64/
 

arch/ppc64/kernel/lmb.c

···
-/*
- * Procedures for interfacing to Open Firmware.
- *
- * Peter Bergner, IBM Corp.	June 2001.
- * Copyright (C) 2001 Peter Bergner.
- * 
- *      This program is free software; you can redistribute it and/or
- *      modify it under the terms of the GNU General Public License
- *      as published by the Free Software Foundation; either version
- *      2 of the License, or (at your option) any later version.
- */
-
-#include <linux/config.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/bitops.h>
-#include <asm/types.h>
-#include <asm/page.h>
-#include <asm/prom.h>
-#include <asm/lmb.h>
-#include <asm/abs_addr.h>
-
-struct lmb lmb;
-
-#undef DEBUG
-
-void lmb_dump_all(void)
-{
-#ifdef DEBUG
-	unsigned long i;
-
-	udbg_printf("lmb_dump_all:\n");
-	udbg_printf("    memory.cnt		  = 0x%lx\n",
-		    lmb.memory.cnt);
-	udbg_printf("    memory.size		  = 0x%lx\n",
-		    lmb.memory.size);
-	for (i=0; i < lmb.memory.cnt ;i++) {
-		udbg_printf("    memory.region[0x%x].base       = 0x%lx\n",
-			    i, lmb.memory.region[i].base);
-		udbg_printf("		      .size     = 0x%lx\n",
-			    lmb.memory.region[i].size);
-	}
-
-	udbg_printf("\n    reserved.cnt	  = 0x%lx\n",
-		    lmb.reserved.cnt);
-	udbg_printf("    reserved.size	  = 0x%lx\n",
-		    lmb.reserved.size);
-	for (i=0; i < lmb.reserved.cnt ;i++) {
-		udbg_printf("    reserved.region[0x%x].base       = 0x%lx\n",
-			    i, lmb.reserved.region[i].base);
-		udbg_printf("		      .size     = 0x%lx\n",
-			    lmb.reserved.region[i].size);
-	}
-#endif /* DEBUG */
-}
-
-static unsigned long __init
-lmb_addrs_overlap(unsigned long base1, unsigned long size1,
-                  unsigned long base2, unsigned long size2)
-{
-	return ((base1 < (base2+size2)) && (base2 < (base1+size1)));
-}
-
-static long __init
-lmb_addrs_adjacent(unsigned long base1, unsigned long size1,
-		   unsigned long base2, unsigned long size2)
-{
-	if (base2 == base1 + size1)
-		return 1;
-	else if (base1 == base2 + size2)
-		return -1;
-
-	return 0;
-}
-
-static long __init
-lmb_regions_adjacent(struct lmb_region *rgn, unsigned long r1, unsigned long r2)
-{
-	unsigned long base1 = rgn->region[r1].base;
-	unsigned long size1 = rgn->region[r1].size;
-	unsigned long base2 = rgn->region[r2].base;
-	unsigned long size2 = rgn->region[r2].size;
-
-	return lmb_addrs_adjacent(base1, size1, base2, size2);
-}
-
-/* Assumption: base addr of region 1 < base addr of region 2 */
-static void __init
-lmb_coalesce_regions(struct lmb_region *rgn, unsigned long r1, unsigned long r2)
-{
-	unsigned long i;
-
-	rgn->region[r1].size += rgn->region[r2].size;
-	for (i=r2; i < rgn->cnt-1; i++) {
-		rgn->region[i].base = rgn->region[i+1].base;
-		rgn->region[i].size = rgn->region[i+1].size;
-	}
-	rgn->cnt--;
-}
-
-/* This routine called with relocation disabled. */
-void __init
-lmb_init(void)
-{
-	/* Create a dummy zero size LMB which will get coalesced away later.
-	 * This simplifies the lmb_add() code below...
-	 */
-	lmb.memory.region[0].base = 0;
-	lmb.memory.region[0].size = 0;
-	lmb.memory.cnt = 1;
-
-	/* Ditto. */
-	lmb.reserved.region[0].base = 0;
-	lmb.reserved.region[0].size = 0;
-	lmb.reserved.cnt = 1;
-}
-
-/* This routine called with relocation disabled. */
-void __init
-lmb_analyze(void)
-{
-	int i;
-
-	lmb.memory.size = 0;
-
-	for (i = 0; i < lmb.memory.cnt; i++)
-		lmb.memory.size += lmb.memory.region[i].size;
-}
-
-/* This routine called with relocation disabled. */
-static long __init
-lmb_add_region(struct lmb_region *rgn, unsigned long base, unsigned long size)
-{
-	unsigned long i, coalesced = 0;
-	long adjacent;
-
-	/* First try and coalesce this LMB with another. */
-	for (i=0; i < rgn->cnt; i++) {
-		unsigned long rgnbase = rgn->region[i].base;
-		unsigned long rgnsize = rgn->region[i].size;
-
-		adjacent = lmb_addrs_adjacent(base,size,rgnbase,rgnsize);
-		if ( adjacent > 0 ) {
-			rgn->region[i].base -= size;
-			rgn->region[i].size += size;
-			coalesced++;
-			break;
-		}
-		else if ( adjacent < 0 ) {
-			rgn->region[i].size += size;
-			coalesced++;
-			break;
-		}
-	}
-
-	if ((i < rgn->cnt-1) && lmb_regions_adjacent(rgn, i, i+1) ) {
-		lmb_coalesce_regions(rgn, i, i+1);
-		coalesced++;
-	}
-
-	if ( coalesced ) {
-		return coalesced;
-	} else if ( rgn->cnt >= MAX_LMB_REGIONS ) {
-		return -1;
-	}
-
-	/* Couldn't coalesce the LMB, so add it to the sorted table. */
-	for (i=rgn->cnt-1; i >= 0; i--) {
-		if (base < rgn->region[i].base) {
-			rgn->region[i+1].base = rgn->region[i].base;
-			rgn->region[i+1].size = rgn->region[i].size;
-		}  else {
-			rgn->region[i+1].base = base;
-			rgn->region[i+1].size = size;
-			break;
-		}
-	}
-	rgn->cnt++;
-
-	return 0;
-}
-
-/* This routine called with relocation disabled. */
-long __init
-lmb_add(unsigned long base, unsigned long size)
-{
-	struct lmb_region *_rgn = &(lmb.memory);
-
-	/* On pSeries LPAR systems, the first LMB is our RMO region. */
-	if ( base == 0 )
-		lmb.rmo_size = size;
-
-	return lmb_add_region(_rgn, base, size);
-
-}
-
-long __init
-lmb_reserve(unsigned long base, unsigned long size)
-{
-	struct lmb_region *_rgn = &(lmb.reserved);
-
-	return lmb_add_region(_rgn, base, size);
-}
-
-long __init
-lmb_overlaps_region(struct lmb_region *rgn, unsigned long base, unsigned long size)
-{
-	unsigned long i;
-
-	for (i=0; i < rgn->cnt; i++) {
-		unsigned long rgnbase = rgn->region[i].base;
-		unsigned long rgnsize = rgn->region[i].size;
-		if ( lmb_addrs_overlap(base,size,rgnbase,rgnsize) ) {
-			break;
-		}
-	}
-
-	return (i < rgn->cnt) ? i : -1;
-}
-
-unsigned long __init
-lmb_alloc(unsigned long size, unsigned long align)
-{
-	return lmb_alloc_base(size, align, LMB_ALLOC_ANYWHERE);
-}
-
-unsigned long __init
-lmb_alloc_base(unsigned long size, unsigned long align, unsigned long max_addr)
-{
-	long i, j;
-	unsigned long base = 0;
-
-	for (i=lmb.memory.cnt-1; i >= 0; i--) {
-		unsigned long lmbbase = lmb.memory.region[i].base;
-		unsigned long lmbsize = lmb.memory.region[i].size;
-
-		if ( max_addr == LMB_ALLOC_ANYWHERE )
-			base = _ALIGN_DOWN(lmbbase+lmbsize-size, align);
-		else if ( lmbbase < max_addr )
-			base = _ALIGN_DOWN(min(lmbbase+lmbsize,max_addr)-size, align);
-		else
-			continue;
-
-		while ( (lmbbase <= base) &&
-			((j = lmb_overlaps_region(&lmb.reserved,base,size)) >= 0) ) {
-			base = _ALIGN_DOWN(lmb.reserved.region[j].base-size, align);
-		}
-
-		if ( (base != 0) && (lmbbase <= base) )
-			break;
-	}
-
-	if ( i < 0 )
-		return 0;
-
-	lmb_add_region(&lmb.reserved, base, size);
-
-	return base;
-}
-
-/* You must call lmb_analyze() before this. */
-unsigned long __init
-lmb_phys_mem_size(void)
-{
-	return lmb.memory.size;
-}
-
-unsigned long __init
-lmb_end_of_DRAM(void)
-{
-	int idx = lmb.memory.cnt - 1;
-
-	return (lmb.memory.region[idx].base + lmb.memory.region[idx].size);
-}
-
-/*
- * Truncate the lmb list to memory_limit if it's set
- * You must call lmb_analyze() after this.
- */
-void __init lmb_enforce_memory_limit(void)
-{
-	extern unsigned long memory_limit;
-	unsigned long i, limit;
-
-	if (! memory_limit)
-		return;
-
-	limit = memory_limit;
-	for (i = 0; i < lmb.memory.cnt; i++) {
-		if (limit > lmb.memory.region[i].size) {
-			limit -= lmb.memory.region[i].size;
-			continue;
-		}
-
-		lmb.memory.region[i].size = limit;
-		lmb.memory.cnt = i + 1;
-		break;
-	}
-}

arch/ppc64/kernel/prom.c

···
 extern struct rtas_t rtas;
 extern struct lmb lmb;
 extern unsigned long klimit;
+extern unsigned long memory_limit;
 
 static int __initdata dt_root_addr_cells;
 static int __initdata dt_root_size_cells;
···
 {
 	u32 *prop;
 	u64 *prop64;
-	extern unsigned long memory_limit, tce_alloc_start, tce_alloc_end;
+	extern unsigned long tce_alloc_start, tce_alloc_end;
 
 	DBG("search \"chosen\", depth: %d, uname: %s\n", depth, uname);
 
···
 	lmb_init();
 	scan_flat_dt(early_init_dt_scan_root, NULL);
 	scan_flat_dt(early_init_dt_scan_memory, NULL);
-	lmb_enforce_memory_limit();
+	lmb_enforce_memory_limit(memory_limit);
 	lmb_analyze();
 	systemcfg->physicalMemorySize = lmb_phys_mem_size();
 	lmb_reserve(0, __pa(klimit));

include/asm-ppc64/lmb.h

···
-#ifndef _PPC64_LMB_H
-#define _PPC64_LMB_H
-
-/*
- * Definitions for talking to the Open Firmware PROM on
- * Power Macintosh computers.
- *
- * Copyright (C) 2001 Peter Bergner, IBM Corp.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#include <linux/init.h>
-#include <asm/prom.h>
-
-#define MAX_LMB_REGIONS 128
-
-#define LMB_ALLOC_ANYWHERE	0
-
-struct lmb_property {
-	unsigned long base;
-	unsigned long size;
-};
-
-struct lmb_region {
-	unsigned long cnt;
-	unsigned long size;
-	struct lmb_property region[MAX_LMB_REGIONS+1];
-};
-
-struct lmb {
-	unsigned long debug;
-	unsigned long rmo_size;
-	struct lmb_region memory;
-	struct lmb_region reserved;
-};
-
-extern struct lmb lmb;
-
-extern void __init lmb_init(void);
-extern void __init lmb_analyze(void);
-extern long __init lmb_add(unsigned long, unsigned long);
-extern long __init lmb_reserve(unsigned long, unsigned long);
-extern unsigned long __init lmb_alloc(unsigned long, unsigned long);
-extern unsigned long __init lmb_alloc_base(unsigned long, unsigned long,
-					   unsigned long);
-extern unsigned long __init lmb_phys_mem_size(void);
-extern unsigned long __init lmb_end_of_DRAM(void);
-extern unsigned long __init lmb_abs_to_phys(unsigned long);
-extern void __init lmb_enforce_memory_limit(void);
-
-extern void lmb_dump_all(void);
-
-extern unsigned long io_hole_start;
-
-static inline unsigned long
-lmb_size_bytes(struct lmb_region *type, unsigned long region_nr)
-{
-	return type->region[region_nr].size;
-}
-static inline unsigned long
-lmb_size_pages(struct lmb_region *type, unsigned long region_nr)
-{
-	return lmb_size_bytes(type, region_nr) >> PAGE_SHIFT;
-}
-static inline unsigned long
-lmb_start_pfn(struct lmb_region *type, unsigned long region_nr)
-{
-	return type->region[region_nr].base >> PAGE_SHIFT;
-}
-static inline unsigned long
-lmb_end_pfn(struct lmb_region *type, unsigned long region_nr)
-{
-	return lmb_start_pfn(type, region_nr) +
-	       lmb_size_pages(type, region_nr);
-}
-
-#endif /* _PPC64_LMB_H */