include/asm-powerpc/kgdb.h

   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)
  31 static 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__ */