diff options
Diffstat (limited to 'bsps/arm/include/bsp/arm-cp15-start.h')
-rw-r--r-- | bsps/arm/include/bsp/arm-cp15-start.h | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/bsps/arm/include/bsp/arm-cp15-start.h b/bsps/arm/include/bsp/arm-cp15-start.h new file mode 100644 index 0000000000..a749f7dc98 --- /dev/null +++ b/bsps/arm/include/bsp/arm-cp15-start.h @@ -0,0 +1,187 @@ +/** + * @file + * + * @ingroup arm_start + * + * @brief Arm CP15 start. + */ + + +/* + * Copyright (c) 2013 Hesham AL-Matary. + * Copyright (c) 2009-2014 embedded brains GmbH. All rights reserved. + * + * embedded brains GmbH + * Dornierstr. 4 + * 82178 Puchheim + * Germany + * <info@embedded-brains.de> + * + * The license and distribution terms for this file may be + * found in the file LICENSE in this distribution or at + * http://www.rtems.org/license/LICENSE. + */ + +#ifndef LIBBSP_ARM_SHARED_ARM_CP15_START_H +#define LIBBSP_ARM_SHARED_ARM_CP15_START_H + +#include <libcpu/arm-cp15.h> +#include <bsp/start.h> +#include <bsp/linker-symbols.h> + +#ifdef __cplusplus +extern "C" { +#endif /* __cplusplus */ + +typedef struct { + uint32_t begin; + uint32_t end; + uint32_t flags; +} arm_cp15_start_section_config; + +#define ARMV7_CP15_START_DEFAULT_SECTIONS \ + { \ + .begin = (uint32_t) bsp_section_fast_text_begin, \ + .end = (uint32_t) bsp_section_fast_text_end, \ + .flags = ARMV7_MMU_CODE_CACHED \ + }, { \ + .begin = (uint32_t) bsp_section_fast_data_begin, \ + .end = (uint32_t) bsp_section_fast_data_end, \ + .flags = ARMV7_MMU_DATA_READ_WRITE_CACHED \ + }, { \ + .begin = (uint32_t) bsp_section_start_begin, \ + .end = (uint32_t) bsp_section_start_end, \ + .flags = ARMV7_MMU_CODE_CACHED \ + }, { \ + .begin = (uint32_t) bsp_section_vector_begin, \ + .end = (uint32_t) bsp_section_vector_end, \ + .flags = ARMV7_MMU_DATA_READ_WRITE_CACHED \ + }, { \ + .begin = (uint32_t) bsp_section_text_begin, \ + .end = (uint32_t) bsp_section_text_end, \ + .flags = ARMV7_MMU_CODE_CACHED \ + }, { \ + .begin = (uint32_t) bsp_section_rodata_begin, \ + .end = (uint32_t) bsp_section_rodata_end, \ + .flags = ARMV7_MMU_DATA_READ_ONLY_CACHED \ + }, { \ + .begin = (uint32_t) bsp_section_data_begin, \ + .end = (uint32_t) bsp_section_data_end, \ + .flags = ARMV7_MMU_DATA_READ_WRITE_CACHED \ + }, { \ + .begin = (uint32_t) bsp_section_bss_begin, \ + .end = (uint32_t) bsp_section_bss_end, \ + .flags = ARMV7_MMU_DATA_READ_WRITE_CACHED \ + }, { \ + .begin = (uint32_t) bsp_section_work_begin, \ + .end = (uint32_t) bsp_section_work_end, \ + .flags = ARMV7_MMU_DATA_READ_WRITE_CACHED \ + }, { \ + .begin = (uint32_t) bsp_section_stack_begin, \ + .end = (uint32_t) bsp_section_stack_end, \ + .flags = ARMV7_MMU_DATA_READ_WRITE_CACHED \ + }, { \ + .begin = (uint32_t) bsp_section_nocache_begin, \ + .end = (uint32_t) bsp_section_nocache_end, \ + .flags = ARMV7_MMU_DEVICE \ + }, { \ + .begin = (uint32_t) bsp_section_nocachenoload_begin, \ + .end = (uint32_t) bsp_section_nocachenoload_end, \ + .flags = ARMV7_MMU_DEVICE \ + }, { \ + .begin = (uint32_t) bsp_translation_table_base, \ + .end = (uint32_t) bsp_translation_table_end, \ + .flags = ARMV7_MMU_DATA_READ_WRITE_CACHED \ + } + +BSP_START_DATA_SECTION extern const arm_cp15_start_section_config + arm_cp15_start_mmu_config_table[]; + +BSP_START_DATA_SECTION extern const size_t + arm_cp15_start_mmu_config_table_size; + +BSP_START_TEXT_SECTION static inline void +arm_cp15_start_set_translation_table_entries( + uint32_t *ttb, + const arm_cp15_start_section_config *config +) +{ + uint32_t i = ARM_MMU_SECT_GET_INDEX(config->begin); + uint32_t iend = + ARM_MMU_SECT_GET_INDEX(ARM_MMU_SECT_MVA_ALIGN_UP(config->end)); + uint32_t index_mask = (1U << (32 - ARM_MMU_SECT_BASE_SHIFT)) - 1U; + + if (config->begin != config->end) { + while (i != iend) { + ttb [i] = (i << ARM_MMU_SECT_BASE_SHIFT) | config->flags; + i = (i + 1U) & index_mask; + } + } +} + +BSP_START_TEXT_SECTION static inline void +arm_cp15_start_setup_translation_table( + uint32_t *ttb, + uint32_t client_domain, + const arm_cp15_start_section_config *config_table, + size_t config_count +) +{ + uint32_t dac = ARM_CP15_DAC_DOMAIN(client_domain, ARM_CP15_DAC_CLIENT); + size_t i; + + arm_cp15_set_domain_access_control(dac); + arm_cp15_set_translation_table_base(ttb); + + /* Initialize translation table with invalid entries */ + for (i = 0; i < ARM_MMU_TRANSLATION_TABLE_ENTRY_COUNT; ++i) { + ttb [i] = 0; + } + + for (i = 0; i < config_count; ++i) { + arm_cp15_start_set_translation_table_entries(ttb, &config_table [i]); + } +} + +BSP_START_TEXT_SECTION static inline void +arm_cp15_start_setup_translation_table_and_enable_mmu_and_cache( + uint32_t ctrl, + uint32_t *ttb, + uint32_t client_domain, + const arm_cp15_start_section_config *config_table, + size_t config_count +) +{ + arm_cp15_start_setup_translation_table( + ttb, + client_domain, + config_table, + config_count + ); + + /* Enable MMU and cache */ + ctrl |= ARM_CP15_CTRL_I | ARM_CP15_CTRL_C | ARM_CP15_CTRL_M; + + arm_cp15_set_control(ctrl); +} + +BSP_START_TEXT_SECTION static inline uint32_t +arm_cp15_start_setup_mmu_and_cache(uint32_t ctrl_clear, uint32_t ctrl_set) +{ + uint32_t ctrl = arm_cp15_get_control(); + + ctrl &= ~ctrl_clear; + ctrl |= ctrl_set; + + arm_cp15_set_control(ctrl); + + arm_cp15_tlb_invalidate(); + + return ctrl; +} + +#ifdef __cplusplus +} +#endif /* __cplusplus */ + +#endif /* LIBBSP_ARM_SHARED_ARM_CP15_START_H */ |