| Ronald G. Minnich | b21eaa7 | 2013-03-07 15:23:45 -0800 | [diff] [blame] | 1 | /* |
| 2 | * This file is part of the libpayload project. |
| 3 | * |
| 4 | * Copyright 2013 Google Inc. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions |
| 8 | * are met: |
| 9 | * 1. Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * 2. Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
| 14 | * 3. The name of the author may not be used to endorse or promote products |
| 15 | * derived from this software without specific prior written permission. |
| 16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 27 | * SUCH DAMAGE. |
| 28 | */ |
| 29 | |
| 30 | exception_stack: |
| 31 | .align 5 |
| 32 | .skip 0x2000, 0xa5 |
| 33 | exception_stack_end: |
| 34 | .word exception_stack_end |
| 35 | |
| 36 | exception_handler: |
| 37 | .word 0 |
| 38 | |
| 39 | |
| 40 | .align 6 |
| 41 | .arm |
| 42 | .global exception_table |
| 43 | exception_table: |
| 44 | b 1f |
| 45 | b 2f |
| 46 | b 3f |
| 47 | b 4f |
| 48 | b 5f |
| 49 | b 6f |
| 50 | b 7f |
| 51 | b 8f |
| 52 | |
| 53 | 1: |
| 54 | ldr sp, _not_used |
| 55 | b exception_common |
| 56 | 2: |
| 57 | ldr sp, _undefined_instruction |
| 58 | b exception_common |
| 59 | 3: |
| 60 | ldr sp, _software_interrupt |
| 61 | b exception_common |
| 62 | 4: |
| 63 | ldr sp, _prefetch_abort |
| 64 | b exception_common |
| 65 | 5: |
| 66 | ldr sp, _data_abort |
| 67 | b exception_common |
| 68 | 6: |
| 69 | ldr sp, _not_used |
| 70 | b exception_common |
| 71 | 7: |
| 72 | ldr sp, _irq |
| 73 | b exception_common |
| 74 | 8: |
| 75 | ldr sp, _fiq |
| 76 | b exception_common |
| 77 | |
| 78 | exception_common: |
| 79 | str sp, exception_handler |
| 80 | ldr sp, exception_stack_end |
| 81 | push { lr } |
| 82 | sub sp, sp, $8 |
| 83 | push { r0 - r12 } |
| 84 | mov r0, sp |
| 85 | mov lr, pc |
| 86 | ldr pc, exception_handler |
| 87 | pop { r0 - r12 } |
| 88 | add sp, sp, $8 |
| 89 | ldm sp!, { pc }^ |
| 90 | |
| 91 | |
| 92 | _undefined_instruction: .word exception_undefined_instruction |
| 93 | _software_interrupt: .word exception_software_interrupt |
| 94 | _prefetch_abort: .word exception_prefetch_abort |
| 95 | _data_abort: .word exception_data_abort |
| 96 | _not_used: .word exception_not_used |
| 97 | _irq: .word exception_irq |
| 98 | _fiq: .word exception_fiq |
| 99 | |
| 100 | .thumb |
| 101 | .global set_vbar |
| 102 | .thumb_func |
| 103 | set_vbar: |
| 104 | mcr p15, 0, r0, c12, c0, 0 |
| 105 | bx lr |
| 106 | |
| 107 | .global exception_test |
| 108 | .thumb_func |
| 109 | exception_test: |
| 110 | mov r1, $1 |
| 111 | mov r0, pc |
| 112 | add r0, $3 |
| 113 | ldr r1, [r1] |
| 114 | bx lr |
| 115 | |