tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * include/asm-powerpc/kgdb.h
3 *
4 * The PowerPC (32/64) specific defines / externs for KGDB. Based on
5 * the previous 32bit and 64bit specific files, which had the following
6 * copyrights:
7 *
8 * PPC64 Mods (C) 2005 Frank Rowand (frowand@mvista.com)
9 * PPC Mods (C) 2004 Tom Rini (trini@mvista.com)
10 * PPC Mods (C) 2003 John Whitney (john.whitney@timesys.com)
11 * PPC Mods (C) 1998 Michael Tesch (tesch@cs.wisc.edu)
12 *
13 *
14 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
15 * Author: Tom Rini <trini@kernel.crashing.org>
16 *
17 * 2006 (c) MontaVista Software, Inc. This file is licensed under
18 * the terms of the GNU General Public License version 2. This program
19 * is licensed "as is" without any warranty of any kind, whether express
20 * or implied.
21 */
22#ifdef __KERNEL__
23#ifndef __POWERPC_KGDB_H__
24#define __POWERPC_KGDB_H__
25
26#ifndef __ASSEMBLY__
27
28#define BREAK_INSTR_SIZE 4
29#define BUFMAX ((NUMREGBYTES * 2) + 512)
30#define OUTBUFMAX ((NUMREGBYTES * 2) + 512)
31static inline void arch_kgdb_breakpoint(void)
32{
33 asm(".long 0x7d821008"); /* twge r2, r2 */
34}
35#define CACHE_FLUSH_IS_SAFE 1
36
37/* The number bytes of registers we have to save depends on a few
38 * things. For 64bit we default to not including vector registers and
39 * vector state registers. */
40#ifdef CONFIG_PPC64
41/*
42 * 64 bit (8 byte) registers:
43 * 32 gpr, 32 fpr, nip, msr, link, ctr
44 * 32 bit (4 byte) registers:
45 * ccr, xer, fpscr
46 */
47#define NUMREGBYTES ((68 * 8) + (3 * 4))
48#define NUMCRITREGBYTES 184
49#else /* CONFIG_PPC32 */
50/* On non-E500 family PPC32 we determine the size by picking the last
51 * register we need, but on E500 we skip sections so we list what we
52 * need to store, and add it up. */
53#ifndef CONFIG_E500
54#define MAXREG (PT_FPSCR+1)
55#else
56/* 32 GPRs (8 bytes), nip, msr, ccr, link, ctr, xer, acc (8 bytes), spefscr*/
57#define MAXREG ((32*2)+6+2+1)
58#endif
59#define NUMREGBYTES (MAXREG * sizeof(int))
60/* CR/LR, R1, R2, R13-R31 inclusive. */
61#define NUMCRITREGBYTES (23 * sizeof(int))
62#endif /* 32/64 */
63#endif /* !(__ASSEMBLY__) */
64#endif /* !__POWERPC_KGDB_H__ */
65#endif /* __KERNEL__ */