mirror of https://github.com/ARMmbed/mbed-os.git
115 lines
2.8 KiB
C
115 lines
2.8 KiB
C
/* mbed Microcontroller Library
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* Copyright (c) 2017 ARM Limited
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "mbed_toolchain.h"
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#include <stdlib.h>
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#include <stdint.h>
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#include "cmsis.h"
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/* This startup is for mbed 2 baremetal. There is no config for RTOS for mbed 2,
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* therefore we protect this file with MBED_CONF_RTOS_PRESENT
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* Note: The new consolidated started for mbed OS is in rtos/mbed_boot code file.
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*/
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#if !defined(MBED_CONF_RTOS_PRESENT)
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/* mbed_main is a function that is called before main()
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* mbed_sdk_init() is also a function that is called before main(), but unlike
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* mbed_main(), it is not meant for user code, but for the SDK itself to perform
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* initializations before main() is called.
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*/
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MBED_WEAK void mbed_main(void)
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{
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}
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/* This function can be implemented by the target to perform higher level target initialization
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*/
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MBED_WEAK void mbed_sdk_init(void)
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{
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}
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MBED_WEAK void software_init_hook_rtos()
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{
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// Nothing by default
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}
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void mbed_copy_nvic(void)
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{
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/* If vector address in RAM is defined, copy and switch to dynamic vectors. Exceptions for M0 which doesn't have
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VTOR register and for A9 for which CMSIS doesn't define NVIC_SetVector; in both cases target code is
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responsible for correctly handling the vectors.
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*/
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#if !defined(__CORTEX_M0) && !defined(__CORTEX_A9)
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#ifdef NVIC_RAM_VECTOR_ADDRESS
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uint32_t *old_vectors = (uint32_t *)SCB->VTOR;
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uint32_t *vectors = (uint32_t*)NVIC_RAM_VECTOR_ADDRESS;
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for (int i = 0; i < NVIC_NUM_VECTORS; i++) {
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vectors[i] = old_vectors[i];
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}
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SCB->VTOR = (uint32_t)NVIC_RAM_VECTOR_ADDRESS;
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#endif /* NVIC_RAM_VECTOR_ADDRESS */
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#endif /* !defined(__CORTEX_M0) && !defined(__CORTEX_A9) */
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}
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/* Toolchain specific main code */
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#if defined (__CC_ARM)
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int $Super$$main(void);
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int $Sub$$main(void)
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{
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mbed_main();
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return $Super$$main();
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}
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void _platform_post_stackheap_init(void)
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{
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mbed_copy_nvic();
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mbed_sdk_init();
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}
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#elif defined (__GNUC__)
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extern int __real_main(void);
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void software_init_hook(void)
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{
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mbed_copy_nvic();
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mbed_sdk_init();
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software_init_hook_rtos();
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}
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int __wrap_main(void)
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{
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mbed_main();
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return __real_main();
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}
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#elif defined (__ICCARM__)
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int __low_level_init(void)
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{
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mbed_copy_nvic();
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return 1;
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}
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#endif
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#endif
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