4.115
Last change
on this file since 2d7ae960 was
c5ed148,
checked in by Sebastian Huber <sebastian.huber@…>, on 09/24/11 at 12:56:51
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2011-09-24 Sebastian Huber <sebastian.huber@…>
- rtems/score/armv7m.h, armv7m-context-initialize.c,
armv7m-context-restore.c, armv7m-context-switch.c,
armv7m-exception-handler-get.c, armv7m-exception-handler-set.c,
armv7m-exception-priority-get.c, armv7m-exception-priority-set.c,
armv7m-initialize.c, armv7m-isr-dispatch.c, armv7m-isr-enter-leave.c,
armv7m-isr-level-get.c, armv7m-isr-level-set.c,
armv7m-isr-vector-install.c, armv7m-multitasking-start-stop.c: New
files.
- Makefile.am, preinstall.am: Reflect changes above.
- rtems/score/arm.h: Define ARM_MULTILIB_ARCH_V4 and
ARM_MULTILIB_ARCH_V7M.
- rtems/score/cpu.h, cpu_asm.S, cpu.c, arm_exc_abort.S,
arm_exc_handler_high.c, arm_exc_handler_low.S, arm_exc_interrupt.S:
Define CPU_HAS_HARDWARE_INTERRUPT_STACK to FALSE. Use
ARM_MULTILIB_ARCH_V4 and ARM_MULTILIB_ARCH_V7M.
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-
Property mode set to
100644
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File size:
2.1 KB
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1 | /** |
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2 | * @file |
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3 | * |
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4 | * @ingroup ScoreCPU |
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5 | * |
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6 | * @brief ARM data and prefetch abort exception prologue and epilogue. |
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7 | */ |
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8 | |
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9 | /* |
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10 | * Copyright (c) 2009 |
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11 | * embedded brains GmbH |
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12 | * Obere Lagerstr. 30 |
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13 | * D-82178 Puchheim |
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14 | * Germany |
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15 | * <rtems@embedded-brains.de> |
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16 | * |
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17 | * The license and distribution terms for this file may be |
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18 | * found in the file LICENSE in this distribution or at |
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19 | * http://www.rtems.com/license/LICENSE. |
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20 | */ |
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21 | |
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22 | #ifdef HAVE_CONFIG_H |
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23 | #include "config.h" |
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24 | #endif |
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25 | |
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26 | #include <rtems/asm.h> |
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27 | #include <rtems/system.h> |
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28 | |
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29 | #ifdef ARM_MULTILIB_ARCH_V4 |
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30 | |
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31 | .extern rtems_fatal_error_occurred |
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32 | |
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33 | .globl arm_exc_data_abort_set_handler |
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34 | .globl arm_exc_data_abort |
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35 | |
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36 | .globl arm_exc_prefetch_abort_set_handler |
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37 | .globl arm_exc_prefetch_abort |
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38 | |
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39 | .section ".bss" |
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40 | |
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41 | data_abort_handler: |
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42 | .long 0 |
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43 | |
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44 | prefetch_abort_handler: |
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45 | .long 0 |
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46 | |
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47 | .section ".text" |
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48 | |
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49 | #ifdef __thumb__ |
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50 | .thumb_func |
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51 | #endif |
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52 | |
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53 | arm_exc_data_abort_set_handler: |
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54 | ldr r1, =data_abort_handler |
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55 | str r0, [r1] |
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56 | #ifdef __thumb__ |
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57 | bx lr |
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58 | #else |
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59 | mov pc, lr |
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60 | #endif |
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61 | |
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62 | #ifdef __thumb__ |
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63 | .thumb_func |
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64 | #endif |
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65 | |
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66 | arm_exc_prefetch_abort_set_handler: |
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67 | ldr r1, =prefetch_abort_handler |
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68 | str r0, [r1] |
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69 | #ifdef __thumb__ |
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70 | bx lr |
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71 | #else |
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72 | mov pc, lr |
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73 | #endif |
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74 | |
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75 | .arm |
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76 | |
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77 | arm_exc_prefetch_abort: |
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78 | |
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79 | /* Save context and load handler */ |
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80 | sub sp, #16 |
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81 | stmdb sp!, {r0-r12} |
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82 | ldr r6, =prefetch_abort_handler |
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83 | |
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84 | b save_more_context |
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85 | |
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86 | arm_exc_data_abort: |
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87 | |
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88 | /* Save context and load handler */ |
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89 | sub sp, #16 |
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90 | stmdb sp!, {r0-r12} |
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91 | ldr r6, =data_abort_handler |
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92 | |
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93 | save_more_context: |
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94 | |
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95 | /* Save more context */ |
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96 | mov r2, lr |
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97 | mrs r3, spsr |
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98 | mrs r4, cpsr |
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99 | orr r5, r3, #ARM_PSR_I |
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100 | bic r5, #ARM_PSR_T |
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101 | msr cpsr, r5 |
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102 | mov r0, sp |
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103 | mov r1, lr |
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104 | msr cpsr, r4 |
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105 | add r5, sp, #68 |
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106 | stmdb r5!, {r0-r3} |
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107 | |
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108 | /* Call high level handler */ |
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109 | ldr r2, [r6] |
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110 | cmp r2, #0 |
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111 | ldreq r2, =rtems_fatal_error_occurred |
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112 | movne r0, sp |
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113 | moveq r0, #0xaa |
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114 | #ifndef __thumb__ |
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115 | mov lr, pc |
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116 | mov pc, r2 |
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117 | #else /* __thumb__ */ |
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118 | SWITCH_FROM_ARM_TO_THUMB r1 |
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119 | bl call_handler |
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120 | SWITCH_FROM_THUMB_TO_ARM |
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121 | #endif /* __thumb__ */ |
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122 | |
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123 | /* Restore context */ |
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124 | ldmia r5!, {r0-r3} |
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125 | mov lr, r2 |
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126 | msr spsr, r3 |
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127 | ldmia sp!, {r0-r12} |
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128 | add sp, #16 |
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129 | |
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130 | /* Return from interrupt */ |
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131 | subs pc, lr, #8 |
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132 | |
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133 | #ifdef __thumb__ |
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134 | .thumb |
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135 | call_handler: |
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136 | bx r2 |
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137 | #endif /* __thumb__ */ |
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138 | |
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139 | #endif /* ARM_MULTILIB_ARCH_V4 */ |
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