1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-only */
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * kgdb support for ARC
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2012 Synopsys, Inc. (www.synopsys.com)
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #ifndef __ARC_KGDB_H__
9*4882a593Smuzhiyun #define __ARC_KGDB_H__
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun #ifdef CONFIG_KGDB
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun #include <asm/ptrace.h>
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun /* to ensure compatibility with Linux 2.6.35, we don't implement the get/set
16*4882a593Smuzhiyun * register API yet */
17*4882a593Smuzhiyun #undef DBG_MAX_REG_NUM
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun #define GDB_MAX_REGS 87
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun #define BREAK_INSTR_SIZE 2
22*4882a593Smuzhiyun #define CACHE_FLUSH_IS_SAFE 1
23*4882a593Smuzhiyun #define NUMREGBYTES (GDB_MAX_REGS * 4)
24*4882a593Smuzhiyun #define BUFMAX 2048
25*4882a593Smuzhiyun
arch_kgdb_breakpoint(void)26*4882a593Smuzhiyun static inline void arch_kgdb_breakpoint(void)
27*4882a593Smuzhiyun {
28*4882a593Smuzhiyun __asm__ __volatile__ ("trap_s 0x4\n");
29*4882a593Smuzhiyun }
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun extern void kgdb_trap(struct pt_regs *regs);
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun /* This is the numbering of registers according to the GDB. See GDB's
34*4882a593Smuzhiyun * arc-tdep.h for details.
35*4882a593Smuzhiyun *
36*4882a593Smuzhiyun * Registers are ordered for GDB 7.5. It is incompatible with GDB 6.8. */
37*4882a593Smuzhiyun enum arc_linux_regnums {
38*4882a593Smuzhiyun _R0 = 0,
39*4882a593Smuzhiyun _R1, _R2, _R3, _R4, _R5, _R6, _R7, _R8, _R9, _R10, _R11, _R12, _R13,
40*4882a593Smuzhiyun _R14, _R15, _R16, _R17, _R18, _R19, _R20, _R21, _R22, _R23, _R24,
41*4882a593Smuzhiyun _R25, _R26,
42*4882a593Smuzhiyun _FP = 27,
43*4882a593Smuzhiyun __SP = 28,
44*4882a593Smuzhiyun _R30 = 30,
45*4882a593Smuzhiyun _BLINK = 31,
46*4882a593Smuzhiyun _LP_COUNT = 60,
47*4882a593Smuzhiyun _STOP_PC = 64,
48*4882a593Smuzhiyun _RET = 64,
49*4882a593Smuzhiyun _LP_START = 65,
50*4882a593Smuzhiyun _LP_END = 66,
51*4882a593Smuzhiyun _STATUS32 = 67,
52*4882a593Smuzhiyun _ECR = 76,
53*4882a593Smuzhiyun _BTA = 82,
54*4882a593Smuzhiyun };
55*4882a593Smuzhiyun
56*4882a593Smuzhiyun #else
57*4882a593Smuzhiyun #define kgdb_trap(regs)
58*4882a593Smuzhiyun #endif
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun #endif /* __ARC_KGDB_H__ */
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