| Vijaya Kumar K | bcf5763 | 2014-01-28 16:50:18 +0530 | [diff] [blame] | 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 | { |
| Catalin Marinas | 7acf71d | 2014-09-25 13:47:47 +0100 | [diff] [blame] | 32 | asm ("brk %0" : : "I" (KGDB_COMPILED_DBG_BRK_IMM)); |
| Vijaya Kumar K | bcf5763 | 2014-01-28 16:50:18 +0530 | [diff] [blame] | 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 */ |