arch/powerpc/include/asm/kgdb.h

   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__ */