1 /*
2 * The PowerPC (32/64) specific defines / externs for KGDB. Based on
3 * the previous 32bit and 64bit specific files, which had the following
4 * copyrights:
5 *
6 * PPC64 Mods (C) 2005 Frank Rowand (frowand@mvista.com)
7 * PPC Mods (C) 2004 Tom Rini (trini@mvista.com)
8 * PPC Mods (C) 2003 John Whitney (john.whitney@timesys.com)
9 * PPC Mods (C) 1998 Michael Tesch (tesch@cs.wisc.edu)
10 *
11 *
12 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
13 * Author: Tom Rini <trini@kernel.crashing.org>
14 *
15 * 2006 (c) MontaVista Software, Inc. This file is licensed under
16 * the terms of the GNU General Public License version 2. This program
17 * is licensed "as is" without any warranty of any kind, whether express
18 * or implied.
19 */
20 #ifdef __KERNEL__
21 #ifndef __POWERPC_KGDB_H__
22 #define __POWERPC_KGDB_H__
23
24 #ifndef __ASSEMBLY__
25
26 #define BREAK_INSTR_SIZE 4
27 #define BUFMAX ((NUMREGBYTES * 2) + 512)
28 #define OUTBUFMAX ((NUMREGBYTES * 2) + 512)
29
30 #define BREAK_INSTR 0x7d821008 /* twge r2, r2 */
31
32 static inline void arch_kgdb_breakpoint(void)
33 {
34 asm(stringify_in_c(.long BREAK_INSTR));
35 }
36 #define CACHE_FLUSH_IS_SAFE 1
37 #define DBG_MAX_REG_NUM 70
38
39 /* The number bytes of registers we have to save depends on a few
40 * things. For 64bit we default to not including vector registers and
41 * vector state registers. */
42 #ifdef CONFIG_PPC64
43 /*
44 * 64 bit (8 byte) registers:
45 * 32 gpr, 32 fpr, nip, msr, link, ctr
46 * 32 bit (4 byte) registers:
47 * ccr, xer, fpscr
48 */
49 #define NUMREGBYTES ((68 * 8) + (3 * 4))
50 #define NUMCRITREGBYTES 184
51 #else /* CONFIG_PPC32 */
52 /* On non-E500 family PPC32 we determine the size by picking the last
53 * register we need, but on E500 we skip sections so we list what we
54 * need to store, and add it up. */
55 #ifndef CONFIG_E500
56 #define MAXREG (PT_FPSCR+1)
57 #else
58 /* 32 GPRs (8 bytes), nip, msr, ccr, link, ctr, xer, acc (8 bytes), spefscr*/
59 #define MAXREG ((32*2)+6+2+1)
60 #endif
61 #define NUMREGBYTES (MAXREG * sizeof(int))
62 /* CR/LR, R1, R2, R13-R31 inclusive. */
63 #define NUMCRITREGBYTES (23 * sizeof(int))
64 #endif /* 32/64 */
65 #endif /* !(__ASSEMBLY__) */
66 #endif /* !__POWERPC_KGDB_H__ */
67 #endif /* __KERNEL__ */