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

   1/* SPDX-License-Identifier: GPL-2.0-only */
   2/*
   3 * kgdb support for ARC
   4 *
   5 * Copyright (C) 2012 Synopsys, Inc. (www.synopsys.com)
   6 */
   7
   8#ifndef __ARC_KGDB_H__
   9#define __ARC_KGDB_H__
  10
  11#ifdef CONFIG_KGDB
  12
  13#include <asm/ptrace.h>
  14
  15/* to ensure compatibility with Linux 2.6.35, we don't implement the get/set
  16 * register API yet */
  17#undef DBG_MAX_REG_NUM
  18
  19#define GDB_MAX_REGS            87
  20
  21#define BREAK_INSTR_SIZE        2
  22#define CACHE_FLUSH_IS_SAFE     1
  23#define NUMREGBYTES             (GDB_MAX_REGS * 4)
  24#define BUFMAX                  2048
  25
  26static inline void arch_kgdb_breakpoint(void)
  27{
  28        __asm__ __volatile__ ("trap_s   0x4\n");
  29}
  30
  31extern void kgdb_trap(struct pt_regs *regs);
  32
  33/* This is the numbering of registers according to the GDB. See GDB's
  34 * arc-tdep.h for details.
  35 *
  36 * Registers are ordered for GDB 7.5. It is incompatible with GDB 6.8. */
  37enum arc_linux_regnums {
  38        _R0             = 0,
  39        _R1, _R2, _R3, _R4, _R5, _R6, _R7, _R8, _R9, _R10, _R11, _R12, _R13,
  40        _R14, _R15, _R16, _R17, _R18, _R19, _R20, _R21, _R22, _R23, _R24,
  41        _R25, _R26,
  42        _FP             = 27,
  43        __SP            = 28,
  44        _R30            = 30,
  45        _BLINK          = 31,
  46        _LP_COUNT       = 60,
  47        _STOP_PC        = 64,
  48        _RET            = 64,
  49        _LP_START       = 65,
  50        _LP_END         = 66,
  51        _STATUS32       = 67,
  52        _ECR            = 76,
  53        _BTA            = 82,
  54};
  55
  56#else
  57#define kgdb_trap(regs)
  58#endif
  59
  60#endif  /* __ARC_KGDB_H__ */
  61