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bcf5763b VK |
1 | /* |
2 | * AArch64 KGDB support | |
3 | * | |
4 | * Based on arch/arm/include/kgdb.h | |
5 | * | |
6 | * Copyright (C) 2013 Cavium Inc. | |
7 | * Author: Vijaya Kumar K <vijaya.kumar@caviumnetworks.com> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
20 | */ | |
21 | ||
22 | #ifndef __ARM_KGDB_H | |
23 | #define __ARM_KGDB_H | |
24 | ||
25 | #include <linux/ptrace.h> | |
26 | #include <asm/debug-monitors.h> | |
27 | ||
28 | #ifndef __ASSEMBLY__ | |
29 | ||
30 | static inline void arch_kgdb_breakpoint(void) | |
31 | { | |
32 | asm ("brk %0" : : "I" (KDBG_COMPILED_DBG_BRK_IMM)); | |
33 | } | |
34 | ||
35 | extern void kgdb_handle_bus_error(void); | |
36 | extern int kgdb_fault_expected; | |
37 | ||
38 | #endif /* !__ASSEMBLY__ */ | |
39 | ||
40 | /* | |
41 | * gdb is expecting the following registers layout. | |
42 | * | |
43 | * General purpose regs: | |
44 | * r0-r30: 64 bit | |
45 | * sp,pc : 64 bit | |
46 | * pstate : 64 bit | |
47 | * Total: 34 | |
48 | * FPU regs: | |
49 | * f0-f31: 128 bit | |
50 | * Total: 32 | |
51 | * Extra regs | |
52 | * fpsr & fpcr: 32 bit | |
53 | * Total: 2 | |
54 | * | |
55 | */ | |
56 | ||
57 | #define _GP_REGS 34 | |
58 | #define _FP_REGS 32 | |
59 | #define _EXTRA_REGS 2 | |
60 | /* | |
61 | * general purpose registers size in bytes. | |
62 | * pstate is only 4 bytes. subtract 4 bytes | |
63 | */ | |
64 | #define GP_REG_BYTES (_GP_REGS * 8) | |
65 | #define DBG_MAX_REG_NUM (_GP_REGS + _FP_REGS + _EXTRA_REGS) | |
66 | ||
67 | /* | |
68 | * Size of I/O buffer for gdb packet. | |
69 | * considering to hold all register contents, size is set | |
70 | */ | |
71 | ||
72 | #define BUFMAX 2048 | |
73 | ||
74 | /* | |
75 | * Number of bytes required for gdb_regs buffer. | |
76 | * _GP_REGS: 8 bytes, _FP_REGS: 16 bytes and _EXTRA_REGS: 4 bytes each | |
77 | * GDB fails to connect for size beyond this with error | |
78 | * "'g' packet reply is too long" | |
79 | */ | |
80 | ||
81 | #define NUMREGBYTES ((_GP_REGS * 8) + (_FP_REGS * 16) + \ | |
82 | (_EXTRA_REGS * 4)) | |
83 | ||
84 | #endif /* __ASM_KGDB_H */ |