[88cf23f8] | 1 | /* |
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| 2 | * Copyright (c) 2013 embedded brains GmbH. All rights reserved. |
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| 3 | * |
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| 4 | * embedded brains GmbH |
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| 5 | * Dornierstr. 4 |
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| 6 | * 82178 Puchheim |
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| 7 | * Germany |
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| 8 | * <info@embedded-brains.de> |
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| 9 | * |
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| 10 | * The license and distribution terms for this file may be |
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| 11 | * found in the file LICENSE in this distribution or at |
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| 12 | * http://www.rtems.com/license/LICENSE. |
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| 13 | */ |
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| 14 | |
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| 15 | #include <libcpu/arm-cp15.h> |
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| 16 | |
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| 17 | #include <bsp/linker-symbols.h> |
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| 18 | |
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| 19 | void arm_cp15_set_exception_handler( |
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| 20 | Arm_symbolic_exception_name exception, |
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| 21 | void (*handler)(void), |
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| 22 | uint32_t section_flags_for_mirror_table_access |
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| 23 | ) |
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| 24 | { |
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| 25 | if ((unsigned) exception < MAX_EXCEPTIONS) { |
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| 26 | uint32_t *cpu_table = (uint32_t *) 0 + MAX_EXCEPTIONS; |
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| 27 | uint32_t *mirror_table = (uint32_t *) bsp_vector_table_begin + MAX_EXCEPTIONS; |
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| 28 | uint32_t current_handler = mirror_table[exception]; |
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| 29 | |
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| 30 | if (current_handler != (uint32_t) handler) { |
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| 31 | size_t table_size = MAX_EXCEPTIONS * sizeof(uint32_t); |
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| 32 | uint32_t cls = arm_cp15_get_min_cache_line_size(); |
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| 33 | uint32_t ctrl; |
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| 34 | rtems_interrupt_level level; |
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| 35 | |
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| 36 | rtems_interrupt_disable(level); |
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| 37 | |
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| 38 | ctrl = arm_cp15_mmu_disable(cls); |
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| 39 | |
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| 40 | mirror_table[exception] = (uint32_t) handler; |
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| 41 | rtems_cache_flush_multiple_data_lines(mirror_table, table_size); |
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| 42 | rtems_cache_invalidate_multiple_instruction_lines(cpu_table, table_size); |
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| 43 | |
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| 44 | arm_cp15_set_control(ctrl); |
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| 45 | |
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| 46 | rtems_interrupt_enable(level); |
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| 47 | } |
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| 48 | } |
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| 49 | } |
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