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
arch_kgdb_breakpoint(void)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
