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platform/mbed_application.c@2:7aab896b1a3b, 2019-03-13 (annotated)
- Committer:
- kevman
- Date:
- Wed Mar 13 11:03:24 2019 +0000
- Revision:
- 2:7aab896b1a3b
- Parent:
- 0:38ceb79fef03
2019-03-13
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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kevman | 0:38ceb79fef03 | 1 | /* mbed Microcontroller Library |
kevman | 0:38ceb79fef03 | 2 | * Copyright (c) 2017-2017 ARM Limited |
kevman | 0:38ceb79fef03 | 3 | * |
kevman | 0:38ceb79fef03 | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
kevman | 0:38ceb79fef03 | 5 | * you may not use this file except in compliance with the License. |
kevman | 0:38ceb79fef03 | 6 | * You may obtain a copy of the License at |
kevman | 0:38ceb79fef03 | 7 | * |
kevman | 0:38ceb79fef03 | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
kevman | 0:38ceb79fef03 | 9 | * |
kevman | 0:38ceb79fef03 | 10 | * Unless required by applicable law or agreed to in writing, software |
kevman | 0:38ceb79fef03 | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
kevman | 0:38ceb79fef03 | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
kevman | 0:38ceb79fef03 | 13 | * See the License for the specific language governing permissions and |
kevman | 0:38ceb79fef03 | 14 | * limitations under the License. |
kevman | 0:38ceb79fef03 | 15 | */ |
kevman | 0:38ceb79fef03 | 16 | |
kevman | 0:38ceb79fef03 | 17 | #include <stdlib.h> |
kevman | 0:38ceb79fef03 | 18 | #include <stdarg.h> |
kevman | 0:38ceb79fef03 | 19 | #include "device.h" |
kevman | 0:38ceb79fef03 | 20 | #include "platform/mbed_application.h" |
kevman | 0:38ceb79fef03 | 21 | |
kevman | 0:38ceb79fef03 | 22 | #if MBED_APPLICATION_SUPPORT |
kevman | 0:38ceb79fef03 | 23 | |
kevman | 0:38ceb79fef03 | 24 | #if defined(__CORTEX_A9) |
kevman | 0:38ceb79fef03 | 25 | |
kevman | 0:38ceb79fef03 | 26 | static void powerdown_gic(void); |
kevman | 0:38ceb79fef03 | 27 | |
kevman | 0:38ceb79fef03 | 28 | void mbed_start_application(uintptr_t address) |
kevman | 0:38ceb79fef03 | 29 | { |
kevman | 0:38ceb79fef03 | 30 | __disable_irq(); |
kevman | 0:38ceb79fef03 | 31 | powerdown_gic(); |
kevman | 0:38ceb79fef03 | 32 | __enable_irq(); |
kevman | 0:38ceb79fef03 | 33 | ((void(*)())address)(); |
kevman | 0:38ceb79fef03 | 34 | } |
kevman | 0:38ceb79fef03 | 35 | |
kevman | 0:38ceb79fef03 | 36 | static void powerdown_gic() |
kevman | 0:38ceb79fef03 | 37 | { |
kevman | 0:38ceb79fef03 | 38 | int i; |
kevman | 0:38ceb79fef03 | 39 | int j; |
kevman | 0:38ceb79fef03 | 40 | |
kevman | 0:38ceb79fef03 | 41 | for (i = 0; i < 32; i++) { |
kevman | 0:38ceb79fef03 | 42 | GICDistributor->ICENABLER[i] = 0xFFFFFFFF; |
kevman | 0:38ceb79fef03 | 43 | GICDistributor->ICPENDR[i] = 0xFFFFFFFF; |
kevman | 0:38ceb79fef03 | 44 | if (i < 4) { |
kevman | 0:38ceb79fef03 | 45 | GICDistributor->CPENDSGIR[i] = 0xFFFFFFFF; |
kevman | 0:38ceb79fef03 | 46 | } |
kevman | 0:38ceb79fef03 | 47 | for (j = 0; j < 8; j++) { |
kevman | 0:38ceb79fef03 | 48 | GICDistributor->IPRIORITYR[i*8+j] = 0x00000000; |
kevman | 0:38ceb79fef03 | 49 | } |
kevman | 0:38ceb79fef03 | 50 | } |
kevman | 0:38ceb79fef03 | 51 | } |
kevman | 0:38ceb79fef03 | 52 | |
kevman | 0:38ceb79fef03 | 53 | #else |
kevman | 0:38ceb79fef03 | 54 | |
kevman | 0:38ceb79fef03 | 55 | static void powerdown_nvic(void); |
kevman | 0:38ceb79fef03 | 56 | static void powerdown_scb(uint32_t vtor); |
kevman | 0:38ceb79fef03 | 57 | static void start_new_application(void *sp, void *pc); |
kevman | 0:38ceb79fef03 | 58 | |
kevman | 0:38ceb79fef03 | 59 | void mbed_start_application(uintptr_t address) |
kevman | 0:38ceb79fef03 | 60 | { |
kevman | 0:38ceb79fef03 | 61 | void *sp; |
kevman | 0:38ceb79fef03 | 62 | void *pc; |
kevman | 0:38ceb79fef03 | 63 | |
kevman | 0:38ceb79fef03 | 64 | // Interrupts are re-enabled in start_new_application |
kevman | 0:38ceb79fef03 | 65 | __disable_irq(); |
kevman | 0:38ceb79fef03 | 66 | |
kevman | 0:38ceb79fef03 | 67 | SysTick->CTRL = 0x00000000; |
kevman | 0:38ceb79fef03 | 68 | powerdown_nvic(); |
kevman | 0:38ceb79fef03 | 69 | powerdown_scb(address); |
kevman | 0:38ceb79fef03 | 70 | |
kevman | 0:38ceb79fef03 | 71 | sp = *((void **)address + 0); |
kevman | 0:38ceb79fef03 | 72 | pc = *((void **)address + 1); |
kevman | 0:38ceb79fef03 | 73 | start_new_application(sp, pc); |
kevman | 0:38ceb79fef03 | 74 | } |
kevman | 0:38ceb79fef03 | 75 | |
kevman | 0:38ceb79fef03 | 76 | static void powerdown_nvic() |
kevman | 0:38ceb79fef03 | 77 | { |
kevman | 0:38ceb79fef03 | 78 | int isr_groups_32; |
kevman | 0:38ceb79fef03 | 79 | int i; |
kevman | 0:38ceb79fef03 | 80 | int j; |
kevman | 0:38ceb79fef03 | 81 | |
kevman | 0:38ceb79fef03 | 82 | #if defined(__CORTEX_M23) |
kevman | 0:38ceb79fef03 | 83 | // M23 doesn't support ICTR and supports up to 240 external interrupts. |
kevman | 0:38ceb79fef03 | 84 | isr_groups_32 = 8; |
kevman | 0:38ceb79fef03 | 85 | #else |
kevman | 0:38ceb79fef03 | 86 | isr_groups_32 = ((SCnSCB->ICTR & SCnSCB_ICTR_INTLINESNUM_Msk) >> SCnSCB_ICTR_INTLINESNUM_Pos) + 1; |
kevman | 0:38ceb79fef03 | 87 | #endif |
kevman | 0:38ceb79fef03 | 88 | for (i = 0; i < isr_groups_32; i++) { |
kevman | 0:38ceb79fef03 | 89 | NVIC->ICER[i] = 0xFFFFFFFF; |
kevman | 0:38ceb79fef03 | 90 | NVIC->ICPR[i] = 0xFFFFFFFF; |
kevman | 0:38ceb79fef03 | 91 | for (j = 0; j < 8; j++) { |
kevman | 0:38ceb79fef03 | 92 | #if defined(__CORTEX_M23) |
kevman | 0:38ceb79fef03 | 93 | NVIC->IPR[i * 8 + j] = 0x00000000; |
kevman | 0:38ceb79fef03 | 94 | #else |
kevman | 0:38ceb79fef03 | 95 | NVIC->IP[i * 8 + j] = 0x00000000; |
kevman | 0:38ceb79fef03 | 96 | #endif |
kevman | 0:38ceb79fef03 | 97 | } |
kevman | 0:38ceb79fef03 | 98 | } |
kevman | 0:38ceb79fef03 | 99 | } |
kevman | 0:38ceb79fef03 | 100 | |
kevman | 0:38ceb79fef03 | 101 | static void powerdown_scb(uint32_t vtor) |
kevman | 0:38ceb79fef03 | 102 | { |
kevman | 0:38ceb79fef03 | 103 | int i; |
kevman | 0:38ceb79fef03 | 104 | |
kevman | 0:38ceb79fef03 | 105 | // SCB->CPUID - Read only CPU ID register |
kevman | 0:38ceb79fef03 | 106 | SCB->ICSR = SCB_ICSR_PENDSVCLR_Msk | SCB_ICSR_PENDSTCLR_Msk; |
kevman | 0:38ceb79fef03 | 107 | SCB->VTOR = vtor; |
kevman | 0:38ceb79fef03 | 108 | SCB->AIRCR = 0x05FA | 0x0000; |
kevman | 0:38ceb79fef03 | 109 | SCB->SCR = 0x00000000; |
kevman | 0:38ceb79fef03 | 110 | // SCB->CCR - Implementation defined value |
kevman | 0:38ceb79fef03 | 111 | #if defined(__CORTEX_M23) |
kevman | 0:38ceb79fef03 | 112 | for (i = 0; i < 2; i++) { |
kevman | 0:38ceb79fef03 | 113 | SCB->SHPR[i] = 0x00; |
kevman | 0:38ceb79fef03 | 114 | } |
kevman | 0:38ceb79fef03 | 115 | #else |
kevman | 0:38ceb79fef03 | 116 | for (i = 0; i < 12; i++) { |
kevman | 0:38ceb79fef03 | 117 | #if defined(__CORTEX_M7) |
kevman | 0:38ceb79fef03 | 118 | SCB->SHPR[i] = 0x00; |
kevman | 0:38ceb79fef03 | 119 | #else |
kevman | 0:38ceb79fef03 | 120 | SCB->SHP[i] = 0x00; |
kevman | 0:38ceb79fef03 | 121 | #endif |
kevman | 0:38ceb79fef03 | 122 | } |
kevman | 0:38ceb79fef03 | 123 | #endif |
kevman | 0:38ceb79fef03 | 124 | SCB->SHCSR = 0x00000000; |
kevman | 0:38ceb79fef03 | 125 | #if defined(__CORTEX_M23) |
kevman | 0:38ceb79fef03 | 126 | #else |
kevman | 0:38ceb79fef03 | 127 | SCB->CFSR = 0xFFFFFFFF; |
kevman | 0:38ceb79fef03 | 128 | SCB->HFSR = SCB_HFSR_DEBUGEVT_Msk | SCB_HFSR_FORCED_Msk | SCB_HFSR_VECTTBL_Msk; |
kevman | 0:38ceb79fef03 | 129 | SCB->DFSR = SCB_DFSR_EXTERNAL_Msk | SCB_DFSR_VCATCH_Msk | |
kevman | 0:38ceb79fef03 | 130 | SCB_DFSR_DWTTRAP_Msk | SCB_DFSR_BKPT_Msk | SCB_DFSR_HALTED_Msk; |
kevman | 0:38ceb79fef03 | 131 | #endif |
kevman | 0:38ceb79fef03 | 132 | // SCB->MMFAR - Implementation defined value |
kevman | 0:38ceb79fef03 | 133 | // SCB->BFAR - Implementation defined value |
kevman | 0:38ceb79fef03 | 134 | // SCB->AFSR - Implementation defined value |
kevman | 0:38ceb79fef03 | 135 | // SCB->PFR - Read only processor feature register |
kevman | 0:38ceb79fef03 | 136 | // SCB->DFR - Read only debug feature registers |
kevman | 0:38ceb79fef03 | 137 | // SCB->ADR - Read only auxiliary feature registers |
kevman | 0:38ceb79fef03 | 138 | // SCB->MMFR - Read only memory model feature registers |
kevman | 0:38ceb79fef03 | 139 | // SCB->ISAR - Read only instruction set attribute registers |
kevman | 0:38ceb79fef03 | 140 | // SCB->CPACR - Implementation defined value |
kevman | 0:38ceb79fef03 | 141 | } |
kevman | 0:38ceb79fef03 | 142 | |
kevman | 0:38ceb79fef03 | 143 | #if defined (__CC_ARM) |
kevman | 0:38ceb79fef03 | 144 | |
kevman | 0:38ceb79fef03 | 145 | __asm static void start_new_application(void *sp, void *pc) |
kevman | 0:38ceb79fef03 | 146 | { |
kevman | 0:38ceb79fef03 | 147 | MOV R2, #0 |
kevman | 0:38ceb79fef03 | 148 | MSR CONTROL, R2 // Switch to main stack |
kevman | 0:38ceb79fef03 | 149 | MOV SP, R0 |
kevman | 0:38ceb79fef03 | 150 | MSR PRIMASK, R2 // Enable interrupts |
kevman | 0:38ceb79fef03 | 151 | BX R1 |
kevman | 0:38ceb79fef03 | 152 | } |
kevman | 0:38ceb79fef03 | 153 | |
kevman | 0:38ceb79fef03 | 154 | #elif defined (__GNUC__) || defined (__ICCARM__) |
kevman | 0:38ceb79fef03 | 155 | |
kevman | 0:38ceb79fef03 | 156 | void start_new_application(void *sp, void *pc) |
kevman | 0:38ceb79fef03 | 157 | { |
kevman | 0:38ceb79fef03 | 158 | __asm volatile( |
kevman | 0:38ceb79fef03 | 159 | "movw r2, #0 \n" // Fail to compile "mov r2, #0" with ARMC6. Replace with MOVW. |
kevman | 0:38ceb79fef03 | 160 | // We needn't "movt r2, #0" immediately following because MOVW |
kevman | 0:38ceb79fef03 | 161 | // will zero-extend the 16-bit immediate. |
kevman | 0:38ceb79fef03 | 162 | "msr control, r2 \n" // Switch to main stack |
kevman | 0:38ceb79fef03 | 163 | "mov sp, %0 \n" |
kevman | 0:38ceb79fef03 | 164 | "msr primask, r2 \n" // Enable interrupts |
kevman | 0:38ceb79fef03 | 165 | "bx %1 \n" |
kevman | 0:38ceb79fef03 | 166 | : |
kevman | 0:38ceb79fef03 | 167 | : "l"(sp), "l"(pc) |
kevman | 0:38ceb79fef03 | 168 | : "r2", "cc", "memory" |
kevman | 0:38ceb79fef03 | 169 | ); |
kevman | 0:38ceb79fef03 | 170 | } |
kevman | 0:38ceb79fef03 | 171 | |
kevman | 0:38ceb79fef03 | 172 | #else |
kevman | 0:38ceb79fef03 | 173 | |
kevman | 0:38ceb79fef03 | 174 | #error "Unsupported toolchain" |
kevman | 0:38ceb79fef03 | 175 | |
kevman | 0:38ceb79fef03 | 176 | #endif |
kevman | 0:38ceb79fef03 | 177 | |
kevman | 0:38ceb79fef03 | 178 | #endif |
kevman | 0:38ceb79fef03 | 179 | |
kevman | 0:38ceb79fef03 | 180 | #endif /* MBED_APPLICATION_SUPPORT */ |