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
  26 static inline void arch_kgdb_breakpoint(void)
  27 {
  28         __asm__ __volatile__ ("trap_s   0x4\n");
  29 }
  30
  31 extern 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. */
  37 enum 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__ */