forked
Embed:
(wiki syntax)
Show/hide line numbers
mbed_sdk_boot.c
00001 /* mbed Microcontroller Library 00002 * Copyright (c) 2017 ARM Limited 00003 * 00004 * Licensed under the Apache License, Version 2.0 (the "License"); 00005 * you may not use this file except in compliance with the License. 00006 * You may obtain a copy of the License at 00007 * 00008 * http://www.apache.org/licenses/LICENSE-2.0 00009 * 00010 * Unless required by applicable law or agreed to in writing, software 00011 * distributed under the License is distributed on an "AS IS" BASIS, 00012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00013 * See the License for the specific language governing permissions and 00014 * limitations under the License. 00015 */ 00016 00017 #include "mbed_toolchain.h" 00018 #include <stdlib.h> 00019 #include <stdint.h> 00020 #include "cmsis.h" 00021 00022 /* This startup is for mbed 2 baremetal. There is no config for RTOS for mbed 2, 00023 * therefore we protect this file with MBED_CONF_RTOS_PRESENT 00024 * Note: The new consolidated started for mbed OS is in rtos/mbed_boot code file. 00025 */ 00026 #if !defined(MBED_CONF_RTOS_PRESENT) 00027 00028 /* mbed_main is a function that is called before main() 00029 * mbed_sdk_init() is also a function that is called before main(), but unlike 00030 * mbed_main(), it is not meant for user code, but for the SDK itself to perform 00031 * initializations before main() is called. 00032 */ 00033 MBED_WEAK void mbed_main(void) 00034 { 00035 00036 } 00037 00038 /* This function can be implemented by the target to perform higher level target initialization 00039 */ 00040 MBED_WEAK void mbed_sdk_init(void) 00041 { 00042 00043 } 00044 00045 MBED_WEAK void software_init_hook_rtos() 00046 { 00047 // Nothing by default 00048 } 00049 00050 void mbed_copy_nvic(void) 00051 { 00052 /* If vector address in RAM is defined, copy and switch to dynamic vectors. Exceptions for M0 which doesn't have 00053 VTOR register and for A9 for which CMSIS doesn't define NVIC_SetVector; in both cases target code is 00054 responsible for correctly handling the vectors. 00055 */ 00056 #if !defined(__CORTEX_M0) && !defined(__CORTEX_A9) 00057 #ifdef NVIC_RAM_VECTOR_ADDRESS 00058 uint32_t *old_vectors = (uint32_t *)SCB->VTOR; 00059 uint32_t *vectors = (uint32_t*)NVIC_RAM_VECTOR_ADDRESS; 00060 for (int i = 0; i < NVIC_NUM_VECTORS; i++) { 00061 vectors[i] = old_vectors[i]; 00062 } 00063 SCB->VTOR = (uint32_t)NVIC_RAM_VECTOR_ADDRESS; 00064 #endif /* NVIC_RAM_VECTOR_ADDRESS */ 00065 #endif /* !defined(__CORTEX_M0) && !defined(__CORTEX_A9) */ 00066 } 00067 00068 /* Toolchain specific main code */ 00069 00070 #if defined (__CC_ARM) 00071 00072 int $Super$$main(void); 00073 00074 int $Sub$$main(void) 00075 { 00076 mbed_main(); 00077 return $Super$$main(); 00078 } 00079 00080 void _platform_post_stackheap_init(void) 00081 { 00082 mbed_copy_nvic(); 00083 mbed_sdk_init(); 00084 } 00085 00086 #elif defined (__GNUC__) 00087 00088 extern int __real_main(void); 00089 00090 void software_init_hook(void) 00091 { 00092 mbed_copy_nvic(); 00093 mbed_sdk_init(); 00094 software_init_hook_rtos(); 00095 } 00096 00097 00098 int __wrap_main(void) 00099 { 00100 mbed_main(); 00101 return __real_main(); 00102 } 00103 00104 #elif defined (__ICCARM__) 00105 00106 int __low_level_init(void) 00107 { 00108 mbed_copy_nvic(); 00109 return 1; 00110 } 00111 00112 #endif 00113 00114 #endif
Generated on Tue Jul 12 2022 16:02:32 by 1.7.2