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