mbed-os
Dependents: cobaLCDJoyMotor_Thread odometry_omni_3roda_v3 odometry_omni_3roda_v1 odometry_omni_3roda_v2 ... more
hal/TARGET_FLASH_CMSIS_ALGO/flash_common_algo.c@0:b74591d5ab33, 2017-12-11 (annotated)
- Committer:
- be_bryan
- Date:
- Mon Dec 11 17:54:04 2017 +0000
- Revision:
- 0:b74591d5ab33
motor ++
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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be_bryan | 0:b74591d5ab33 | 1 | /* mbed Microcontroller Library |
be_bryan | 0:b74591d5ab33 | 2 | * Copyright (c) 2017 ARM Limited |
be_bryan | 0:b74591d5ab33 | 3 | * |
be_bryan | 0:b74591d5ab33 | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
be_bryan | 0:b74591d5ab33 | 5 | * you may not use this file except in compliance with the License. |
be_bryan | 0:b74591d5ab33 | 6 | * You may obtain a copy of the License at |
be_bryan | 0:b74591d5ab33 | 7 | * |
be_bryan | 0:b74591d5ab33 | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
be_bryan | 0:b74591d5ab33 | 9 | * |
be_bryan | 0:b74591d5ab33 | 10 | * Unless required by applicable law or agreed to in writing, software |
be_bryan | 0:b74591d5ab33 | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
be_bryan | 0:b74591d5ab33 | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
be_bryan | 0:b74591d5ab33 | 13 | * See the License for the specific language governing permissions and |
be_bryan | 0:b74591d5ab33 | 14 | * limitations under the License. |
be_bryan | 0:b74591d5ab33 | 15 | */ |
be_bryan | 0:b74591d5ab33 | 16 | |
be_bryan | 0:b74591d5ab33 | 17 | #include "flash_api.h" |
be_bryan | 0:b74591d5ab33 | 18 | #include "flash_data.h" |
be_bryan | 0:b74591d5ab33 | 19 | #include "mbed_critical.h" |
be_bryan | 0:b74591d5ab33 | 20 | |
be_bryan | 0:b74591d5ab33 | 21 | #define MBED_FLASH_ALGO_ERASE 1UL |
be_bryan | 0:b74591d5ab33 | 22 | #define MBED_FLASH_ALGO_PROGRAM 2UL |
be_bryan | 0:b74591d5ab33 | 23 | |
be_bryan | 0:b74591d5ab33 | 24 | extern uint32_t SystemCoreClock; |
be_bryan | 0:b74591d5ab33 | 25 | |
be_bryan | 0:b74591d5ab33 | 26 | /* |
be_bryan | 0:b74591d5ab33 | 27 | This binary blob (thumb code) sets r9 (static base) as the code we are jumping to |
be_bryan | 0:b74591d5ab33 | 28 | is PIC (position independent code). |
be_bryan | 0:b74591d5ab33 | 29 | |
be_bryan | 0:b74591d5ab33 | 30 | These are the instructions (r0 is a pointer to arg_t): |
be_bryan | 0:b74591d5ab33 | 31 | push {r5, lr, r4} |
be_bryan | 0:b74591d5ab33 | 32 | mov r5, r9 |
be_bryan | 0:b74591d5ab33 | 33 | push {r5} |
be_bryan | 0:b74591d5ab33 | 34 | ldr r5, [r0, #20] |
be_bryan | 0:b74591d5ab33 | 35 | ldr r3, [r0, #16] |
be_bryan | 0:b74591d5ab33 | 36 | mov r9, r3 |
be_bryan | 0:b74591d5ab33 | 37 | ldr r3, [r0, #12] |
be_bryan | 0:b74591d5ab33 | 38 | ldr r2, [r0, #8] |
be_bryan | 0:b74591d5ab33 | 39 | ldr r1, [r0, #4] |
be_bryan | 0:b74591d5ab33 | 40 | ldr r0, [r0, #0] |
be_bryan | 0:b74591d5ab33 | 41 | blx r5 |
be_bryan | 0:b74591d5ab33 | 42 | pop {r5} |
be_bryan | 0:b74591d5ab33 | 43 | mov r9, r5 |
be_bryan | 0:b74591d5ab33 | 44 | pop {r4-r5, pc} |
be_bryan | 0:b74591d5ab33 | 45 | bx r14 |
be_bryan | 0:b74591d5ab33 | 46 | */ |
be_bryan | 0:b74591d5ab33 | 47 | static uint32_t jump_to_flash_algo[] = { |
be_bryan | 0:b74591d5ab33 | 48 | 0x464DB530, |
be_bryan | 0:b74591d5ab33 | 49 | 0x6945B420, |
be_bryan | 0:b74591d5ab33 | 50 | 0x46996903, |
be_bryan | 0:b74591d5ab33 | 51 | 0x688268C3, |
be_bryan | 0:b74591d5ab33 | 52 | 0x68006841, |
be_bryan | 0:b74591d5ab33 | 53 | 0xBC2047A8, |
be_bryan | 0:b74591d5ab33 | 54 | 0xBD3046A9 |
be_bryan | 0:b74591d5ab33 | 55 | }; |
be_bryan | 0:b74591d5ab33 | 56 | |
be_bryan | 0:b74591d5ab33 | 57 | // should be called within critical section |
be_bryan | 0:b74591d5ab33 | 58 | static int32_t flash_algo_init(flash_t *obj, uint32_t address, uint32_t function) |
be_bryan | 0:b74591d5ab33 | 59 | { |
be_bryan | 0:b74591d5ab33 | 60 | args_t arguments = { |
be_bryan | 0:b74591d5ab33 | 61 | .r0 = address, |
be_bryan | 0:b74591d5ab33 | 62 | .r1 = SystemCoreClock, |
be_bryan | 0:b74591d5ab33 | 63 | .r2 = function, |
be_bryan | 0:b74591d5ab33 | 64 | .r3 = 0, |
be_bryan | 0:b74591d5ab33 | 65 | .r9 = (uint32_t)obj->flash_algo->algo_blob + obj->flash_algo->static_base, |
be_bryan | 0:b74591d5ab33 | 66 | .pc = (uint32_t)obj->flash_algo->algo_blob + obj->flash_algo->init |
be_bryan | 0:b74591d5ab33 | 67 | }; |
be_bryan | 0:b74591d5ab33 | 68 | return ((flash_algo_jump_t)(((uint32_t)&jump_to_flash_algo) | 1))(&arguments); |
be_bryan | 0:b74591d5ab33 | 69 | } |
be_bryan | 0:b74591d5ab33 | 70 | |
be_bryan | 0:b74591d5ab33 | 71 | // should be called within critical section |
be_bryan | 0:b74591d5ab33 | 72 | static int32_t flash_algo_uninit(flash_t *obj, uint32_t address, uint32_t function) |
be_bryan | 0:b74591d5ab33 | 73 | { |
be_bryan | 0:b74591d5ab33 | 74 | args_t arguments = { |
be_bryan | 0:b74591d5ab33 | 75 | .r0 = address, |
be_bryan | 0:b74591d5ab33 | 76 | .r1 = SystemCoreClock, |
be_bryan | 0:b74591d5ab33 | 77 | .r2 = function, |
be_bryan | 0:b74591d5ab33 | 78 | .r3 = 0, |
be_bryan | 0:b74591d5ab33 | 79 | .r9 = (uint32_t)obj->flash_algo->algo_blob + obj->flash_algo->static_base, |
be_bryan | 0:b74591d5ab33 | 80 | .pc = (uint32_t)obj->flash_algo->algo_blob + obj->flash_algo->uninit |
be_bryan | 0:b74591d5ab33 | 81 | }; |
be_bryan | 0:b74591d5ab33 | 82 | return ((flash_algo_jump_t)(((uint32_t)&jump_to_flash_algo) | 1))(&arguments); |
be_bryan | 0:b74591d5ab33 | 83 | } |
be_bryan | 0:b74591d5ab33 | 84 | |
be_bryan | 0:b74591d5ab33 | 85 | |
be_bryan | 0:b74591d5ab33 | 86 | int32_t flash_init(flash_t *obj) |
be_bryan | 0:b74591d5ab33 | 87 | { |
be_bryan | 0:b74591d5ab33 | 88 | flash_set_target_config(obj); |
be_bryan | 0:b74591d5ab33 | 89 | return 0; |
be_bryan | 0:b74591d5ab33 | 90 | } |
be_bryan | 0:b74591d5ab33 | 91 | |
be_bryan | 0:b74591d5ab33 | 92 | int32_t flash_free(flash_t *obj) |
be_bryan | 0:b74591d5ab33 | 93 | { |
be_bryan | 0:b74591d5ab33 | 94 | return 0; |
be_bryan | 0:b74591d5ab33 | 95 | } |
be_bryan | 0:b74591d5ab33 | 96 | |
be_bryan | 0:b74591d5ab33 | 97 | int32_t flash_erase_sector(flash_t *obj, uint32_t address) |
be_bryan | 0:b74591d5ab33 | 98 | { |
be_bryan | 0:b74591d5ab33 | 99 | core_util_critical_section_enter(); |
be_bryan | 0:b74591d5ab33 | 100 | flash_algo_init(obj, address, MBED_FLASH_ALGO_ERASE); |
be_bryan | 0:b74591d5ab33 | 101 | |
be_bryan | 0:b74591d5ab33 | 102 | args_t arguments = { |
be_bryan | 0:b74591d5ab33 | 103 | .r0 = address, |
be_bryan | 0:b74591d5ab33 | 104 | .r1 = 0, |
be_bryan | 0:b74591d5ab33 | 105 | .r2 = 0, |
be_bryan | 0:b74591d5ab33 | 106 | .r3 = 0, |
be_bryan | 0:b74591d5ab33 | 107 | .r9 = (uint32_t)obj->flash_algo->algo_blob + obj->flash_algo->static_base, |
be_bryan | 0:b74591d5ab33 | 108 | .pc = (uint32_t)obj->flash_algo->algo_blob + obj->flash_algo->erase_sector |
be_bryan | 0:b74591d5ab33 | 109 | }; |
be_bryan | 0:b74591d5ab33 | 110 | int32_t ret = ((flash_algo_jump_t)(((uint32_t)&jump_to_flash_algo) | 1))(&arguments); |
be_bryan | 0:b74591d5ab33 | 111 | |
be_bryan | 0:b74591d5ab33 | 112 | flash_algo_uninit(obj, address, MBED_FLASH_ALGO_ERASE); |
be_bryan | 0:b74591d5ab33 | 113 | core_util_critical_section_exit(); |
be_bryan | 0:b74591d5ab33 | 114 | return ret ? -1 : 0; |
be_bryan | 0:b74591d5ab33 | 115 | } |
be_bryan | 0:b74591d5ab33 | 116 | |
be_bryan | 0:b74591d5ab33 | 117 | |
be_bryan | 0:b74591d5ab33 | 118 | int32_t flash_program_page(flash_t *obj, uint32_t address, const uint8_t *data, uint32_t size) |
be_bryan | 0:b74591d5ab33 | 119 | { |
be_bryan | 0:b74591d5ab33 | 120 | core_util_critical_section_enter(); |
be_bryan | 0:b74591d5ab33 | 121 | flash_algo_init(obj, address, MBED_FLASH_ALGO_PROGRAM); |
be_bryan | 0:b74591d5ab33 | 122 | |
be_bryan | 0:b74591d5ab33 | 123 | args_t arguments = { |
be_bryan | 0:b74591d5ab33 | 124 | .r0 = address, |
be_bryan | 0:b74591d5ab33 | 125 | .r1 = size, |
be_bryan | 0:b74591d5ab33 | 126 | .r2 = (uint32_t)data, |
be_bryan | 0:b74591d5ab33 | 127 | .r3 = 0, |
be_bryan | 0:b74591d5ab33 | 128 | .r9 = (uint32_t)obj->flash_algo->algo_blob + obj->flash_algo->static_base, |
be_bryan | 0:b74591d5ab33 | 129 | .pc = (uint32_t)obj->flash_algo->algo_blob + obj->flash_algo->program_page |
be_bryan | 0:b74591d5ab33 | 130 | }; |
be_bryan | 0:b74591d5ab33 | 131 | int32_t ret = ((flash_algo_jump_t)(((uint32_t)&jump_to_flash_algo) | 1))(&arguments); |
be_bryan | 0:b74591d5ab33 | 132 | |
be_bryan | 0:b74591d5ab33 | 133 | flash_algo_uninit(obj, address, MBED_FLASH_ALGO_PROGRAM); |
be_bryan | 0:b74591d5ab33 | 134 | core_util_critical_section_exit(); |
be_bryan | 0:b74591d5ab33 | 135 | return ret ? -1 : 0; |
be_bryan | 0:b74591d5ab33 | 136 | } |
be_bryan | 0:b74591d5ab33 | 137 | |
be_bryan | 0:b74591d5ab33 | 138 | |
be_bryan | 0:b74591d5ab33 | 139 | uint32_t flash_get_sector_size(const flash_t *obj, uint32_t address) |
be_bryan | 0:b74591d5ab33 | 140 | { |
be_bryan | 0:b74591d5ab33 | 141 | const sector_info_t *sectors = obj->target_config->sectors; |
be_bryan | 0:b74591d5ab33 | 142 | |
be_bryan | 0:b74591d5ab33 | 143 | if (address >= obj->target_config->flash_start + obj->target_config->flash_size) { |
be_bryan | 0:b74591d5ab33 | 144 | return MBED_FLASH_INVALID_SIZE; |
be_bryan | 0:b74591d5ab33 | 145 | } |
be_bryan | 0:b74591d5ab33 | 146 | |
be_bryan | 0:b74591d5ab33 | 147 | int sector_index = obj->target_config->sector_info_count - 1; |
be_bryan | 0:b74591d5ab33 | 148 | for (; sector_index >= 0; sector_index--) { |
be_bryan | 0:b74591d5ab33 | 149 | if (address >= sectors[sector_index].start) { |
be_bryan | 0:b74591d5ab33 | 150 | return sectors[sector_index].size; |
be_bryan | 0:b74591d5ab33 | 151 | } |
be_bryan | 0:b74591d5ab33 | 152 | } |
be_bryan | 0:b74591d5ab33 | 153 | return MBED_FLASH_INVALID_SIZE; |
be_bryan | 0:b74591d5ab33 | 154 | } |
be_bryan | 0:b74591d5ab33 | 155 | |
be_bryan | 0:b74591d5ab33 | 156 | uint32_t flash_get_page_size(const flash_t *obj) |
be_bryan | 0:b74591d5ab33 | 157 | { |
be_bryan | 0:b74591d5ab33 | 158 | return obj->target_config->page_size; |
be_bryan | 0:b74591d5ab33 | 159 | } |
be_bryan | 0:b74591d5ab33 | 160 | |
be_bryan | 0:b74591d5ab33 | 161 | uint32_t flash_get_start_address(const flash_t *obj) |
be_bryan | 0:b74591d5ab33 | 162 | { |
be_bryan | 0:b74591d5ab33 | 163 | return obj->target_config->flash_start; |
be_bryan | 0:b74591d5ab33 | 164 | } |
be_bryan | 0:b74591d5ab33 | 165 | |
be_bryan | 0:b74591d5ab33 | 166 | uint32_t flash_get_size(const flash_t *obj) |
be_bryan | 0:b74591d5ab33 | 167 | { |
be_bryan | 0:b74591d5ab33 | 168 | return obj->target_config->flash_size; |
be_bryan | 0:b74591d5ab33 | 169 | } |