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__ */ 61