LXR linux/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
  32static 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__ */
  68