| Duy Truong | 790f06d | 2013-02-13 16:38:12 -0800 | [diff] [blame] | 1 | /* Copyright (c) 2012, The Linux Foundation. All rights reserved. |
| Rohit Vaswani | ead426f | 2012-01-05 20:24:52 -0800 | [diff] [blame] | 2 | * |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License version 2 and |
| 5 | * only version 2 as published by the Free Software Foundation. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | * |
| 12 | */ |
| 13 | |
| 14 | #include <linux/linkage.h> |
| 15 | #include <asm/assembler.h> |
| 16 | |
| 17 | #define VERSION_ID 0x1 |
| 18 | #define MAGIC 0xDEAD0000 | VERSION_ID |
| 19 | |
| 20 | .text |
| 21 | |
| 22 | .align 3 |
| 23 | |
| 24 | ENTRY(msm_wdog_fiq_start) |
| 25 | mov sp, r8 @get stack |
| 26 | ldr r8, Ldump_cpu_ctx |
| 27 | @ store magic to indicate a valid dump |
| 28 | ldr r9, Lmagic |
| 29 | str r9, [r8], #4 |
| 30 | @ get the current cpsr |
| 31 | mrs r9, cpsr |
| 32 | str r9, [r8],#4 |
| 33 | @ get the USR r0-r7 |
| 34 | stmia r8!, {r0-r7} |
| 35 | mov r4, r8 |
| 36 | mov r5, #PSR_I_BIT | PSR_F_BIT | SYSTEM_MODE |
| 37 | msr cpsr_c, r5 @ select SYSTEM mode |
| 38 | stmia r4!, {r8-r14} |
| 39 | mov r5, #PSR_I_BIT | PSR_F_BIT | IRQ_MODE |
| 40 | msr cpsr_c, r5 @ select IRQ mode |
| 41 | mrs r5, spsr |
| 42 | str r5, [r4], #4 |
| 43 | stmia r4!, {r13-r14} |
| 44 | mov r5, #PSR_I_BIT | PSR_F_BIT | SVC_MODE |
| 45 | msr cpsr_c, r5 @ select SVC mode |
| 46 | mrs r5, spsr |
| 47 | str r5, [r4], #4 |
| 48 | stmia r4!, {r13-r14} |
| 49 | mov r5, #PSR_I_BIT | PSR_F_BIT | ABT_MODE |
| 50 | msr cpsr_c, r5 @ select ABT mode |
| 51 | mrs r5, spsr |
| 52 | str r5, [r4], #4 |
| 53 | stmia r4!, {r13-r14} |
| 54 | mov r5, #PSR_I_BIT | PSR_F_BIT | UND_MODE |
| 55 | msr cpsr_c, r5 @ select UND mode |
| 56 | mrs r5, spsr |
| 57 | str r5, [r4], #4 |
| 58 | stmia r4!, {r13-r14} |
| 59 | mov r5, #PSR_I_BIT | PSR_F_BIT | FIQ_MODE |
| 60 | msr cpsr_c, r5 @ select FIQ mode |
| 61 | mrs r5, spsr |
| 62 | str r5, [r4], #4 |
| 63 | stmia r4!, {r8-r14} |
| 64 | dsb |
| 65 | mov r5, #PSR_F_BIT | SVC_MODE |
| 66 | msr cpsr_c, r5 @ select SVC mode |
| 67 | ldr r2, Lwatchdog_bark_fin |
| 68 | blx r2 |
| 69 | Ldump_cpu_ctx: |
| 70 | .word msm_dump_cpu_ctx |
| 71 | Lmagic: |
| 72 | .word MAGIC |
| 73 | Lwatchdog_bark_fin: |
| 74 | .word msm_wdog_bark_fin |
| 75 | ENTRY(msm_wdog_fiq_length) |
| 76 | .word . - msm_wdog_fiq_start |
| 77 | |
| 78 | /* setup the stack */ |
| 79 | ENTRY(msm_wdog_fiq_setup) |
| 80 | mrs r3, cpsr |
| 81 | msr cpsr_c, #(FIQ_MODE | PSR_I_BIT | PSR_F_BIT) |
| 82 | mov r8, r0 |
| 83 | msr cpsr_c, r3 |
| 84 | bx lr |