/*******************************************************************************
 * Copyright (c) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
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 * copy of this software and associated documentation files (the "Software"),
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 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
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 * OTHER DEALINGS IN THE SOFTWARE.
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 * Except as contained in this notice, the name of Maxim Integrated
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 *
 * The mere transfer of this software does not imply any licenses
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 *******************************************************************************
 */

#include "cmsis_nvic.h"

#if defined(TOOLCHAIN_GCC_ARM) || defined(TOOLCHAIN_ARM_STD)
__attribute__((aligned(256)))
#endif
#if defined(TOOLCHAIN_IAR)
#pragma data_alignment=256
#endif
static void (*ramVectorTable[MXC_IRQ_COUNT])(void);

void NVIC_SetVector(IRQn_Type IRQn, uint32_t vector)
{
    uint32_t *vectors = (uint32_t*)SCB->VTOR;
    uint32_t i;

    // Copy and switch to dynamic vectors if the first time called
    if (SCB->VTOR != (uint32_t)ramVectorTable) {
        uint32_t *old_vectors = (uint32_t*)SCB->VTOR;
        vectors = (uint32_t*)ramVectorTable;
        for (i = 0; i < NVIC_NUM_VECTORS; i++) {
            vectors[i] = old_vectors[i];
        }
        SCB->VTOR = (uint32_t)ramVectorTable;
    }
    vectors[IRQn + NVIC_USER_IRQ_OFFSET] = vector;
}

uint32_t NVIC_GetVector(IRQn_Type IRQn)
{
    uint32_t *vectors = (uint32_t*)SCB->VTOR;
    return vectors[IRQn + NVIC_USER_IRQ_OFFSET];
}