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            39
  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
  29 static inline void arch_kgdb_breakpoint(void)
  30 {
  31         __asm__ __volatile__ ("trap_s   0x4\n");
  32 }
  33
  34 extern void kgdb_trap(struct pt_regs *regs);
  35
  36 enum arc700_linux_regnums {
  37         _R0             = 0,
  38         _R1, _R2, _R3, _R4, _R5, _R6, _R7, _R8, _R9, _R10, _R11, _R12, _R13,
  39         _R14, _R15, _R16, _R17, _R18, _R19, _R20, _R21, _R22, _R23, _R24,
  40         _R25, _R26,
  41         _BTA            = 27,
  42         _LP_START       = 28,
  43         _LP_END         = 29,
  44         _LP_COUNT       = 30,
  45         _STATUS32       = 31,
  46         _BLINK          = 32,
  47         _FP             = 33,
  48         __SP            = 34,
  49         _EFA            = 35,
  50         _RET            = 36,
  51         _ORIG_R8        = 37,
  52         _STOP_PC        = 38
  53 };
  54
  55 #else
  56 #define kgdb_trap(regs)
  57 #endif
  58
  59 #endif  /* __ARC_KGDB_H__ */