LXR linux/arch/arc/include/asm/kgdb.h

   1/*
   2 * kgdb support for ARC
   3 *
   4 * Copyright (C) 2012 Synopsys, Inc. (www.synopsys.com)
   5 *
   6 * This program is free software; you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License version 2 as
   8 * published by the Free Software Foundation.
   9 */
  10
  11#ifndef __ARC_KGDB_H__
  12#define __ARC_KGDB_H__
  13
  14#ifdef CONFIG_KGDB
  15
  16#include <asm/ptrace.h>
  17
  18/* to ensure compatibility with Linux 2.6.35, we don't implement the get/set
  19 * register API yet */
  20#undef DBG_MAX_REG_NUM
  21
  22#define GDB_MAX_REGS            87
  23
  24#define BREAK_INSTR_SIZE        2
  25#define CACHE_FLUSH_IS_SAFE     1
  26#define NUMREGBYTES             (GDB_MAX_REGS * 4)
  27#define BUFMAX                  2048
  28
  29static inline void arch_kgdb_breakpoint(void)
  30{
  31        __asm__ __volatile__ ("trap_s   0x4\n");
  32}
  33
  34extern void kgdb_trap(struct pt_regs *regs);
  35
  36/* This is the numbering of registers according to the GDB. See GDB's
  37 * arc-tdep.h for details.
  38 *
  39 * Registers are ordered for GDB 7.5. It is incompatible with GDB 6.8. */
  40enum arc_linux_regnums {
  41        _R0             = 0,
  42        _R1, _R2, _R3, _R4, _R5, _R6, _R7, _R8, _R9, _R10, _R11, _R12, _R13,
  43        _R14, _R15, _R16, _R17, _R18, _R19, _R20, _R21, _R22, _R23, _R24,
  44        _R25, _R26,
  45        _FP             = 27,
  46        __SP            = 28,
  47        _R30            = 30,
  48        _BLINK          = 31,
  49        _LP_COUNT       = 60,
  50        _STOP_PC        = 64,
  51        _RET            = 64,
  52        _LP_START       = 65,
  53        _LP_END         = 66,
  54        _STATUS32       = 67,
  55        _ECR            = 76,
  56        _BTA            = 82,
  57};
  58
  59#else
  60#define kgdb_trap(regs)
  61#endif
  62
  63#endif  /* __ARC_KGDB_H__ */
  64