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__ */ 64