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
  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 /* 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. */
  40 enum 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__ */