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kgdb.h
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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 ([email protected])
7  * PPC Mods (C) 2004 Tom Rini ([email protected])
8  * PPC Mods (C) 2003 John Whitney ([email protected])
9  * PPC Mods (C) 1998 Michael Tesch ([email protected])
10  *
11  *
12  * Copyright (C) 1995 David S. Miller ([email protected])
13  * Author: Tom Rini <[email protected]>
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 static inline void arch_kgdb_breakpoint(void)
30 {
31  asm(".long 0x7d821008"); /* twge r2, r2 */
32 }
33 #define CACHE_FLUSH_IS_SAFE 1
34 #define DBG_MAX_REG_NUM 70
35 
36 /* The number bytes of registers we have to save depends on a few
37  * things. For 64bit we default to not including vector registers and
38  * vector state registers. */
39 #ifdef CONFIG_PPC64
40 /*
41  * 64 bit (8 byte) registers:
42  * 32 gpr, 32 fpr, nip, msr, link, ctr
43  * 32 bit (4 byte) registers:
44  * ccr, xer, fpscr
45  */
46 #define NUMREGBYTES ((68 * 8) + (3 * 4))
47 #define NUMCRITREGBYTES 184
48 #else /* CONFIG_PPC32 */
49 /* On non-E500 family PPC32 we determine the size by picking the last
50  * register we need, but on E500 we skip sections so we list what we
51  * need to store, and add it up. */
52 #ifndef CONFIG_E500
53 #define MAXREG (PT_FPSCR+1)
54 #else
55 /* 32 GPRs (8 bytes), nip, msr, ccr, link, ctr, xer, acc (8 bytes), spefscr*/
56 #define MAXREG ((32*2)+6+2+1)
57 #endif
58 #define NUMREGBYTES (MAXREG * sizeof(int))
59 /* CR/LR, R1, R2, R13-R31 inclusive. */
60 #define NUMCRITREGBYTES (23 * sizeof(int))
61 #endif /* 32/64 */
62 #endif /* !(__ASSEMBLY__) */
63 #endif /* !__POWERPC_KGDB_H__ */
64 #endif /* __KERNEL__ */