1 /* mbed Microcontroller Library
2 * CMSIS-style functionality to support dynamic vectors
3 *******************************************************************************
4 * Copyright (c) 2011 ARM Limited. All rights reserved.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright notice,
13 * this list of conditions and the following disclaimer in the documentation
14 * and/or other materials provided with the distribution.
15 * 3. Neither the name of ARM Limited nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
20 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
22 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
25 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
26 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
27 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 *******************************************************************************
30 */
31 #include "cmsis_nvic.h"
32
33 #if defined(__ARMCC_VERSION)
34 extern uint32_t Image$$EXEC_VECTORS$$Base;
35 extern uint32_t Image$$RAM_VECTORS$$ZI$$Base;
36 #elif defined(__GNUC__)
37 extern uint32_t __code_start__;
38 extern uint32_t __vectors_start__;
39 #endif
40
NVIC_Vectors_Init(void)41 void NVIC_Vectors_Init(void)
42 {
43 #if defined(__ARMCC_VERSION)
44 uint32_t *old_vectors = (uint32_t *)&Image$$EXEC_VECTORS$$Base;
45 uint32_t *new_vectors = (uint32_t *)&Image$$RAM_VECTORS$$ZI$$Base;
46 #elif defined(__GNUC__)
47 uint32_t *old_vectors = (uint32_t *)&__code_start__;
48 uint32_t *new_vectors = (uint32_t *)&__vectors_start__;
49 #endif
50 uint32_t i;
51
52 for (i = 0; i < NVIC_NUM_VECTORS; i++) {
53 new_vectors[i] = old_vectors[i];
54 }
55
56 SCB->VTOR = (uint32_t)new_vectors;
57 }
58
59