/* ----------------------------------------------------------------------------
 *         ATMEL Microcontroller Software Support
 * ----------------------------------------------------------------------------
 * Copyright (c) 2009, Atmel Corporation
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the disclaimer below.
 *
 * Atmel's name may not be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
 * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * ----------------------------------------------------------------------------
 */

/*
 * $Id: board_cstartup_gnu.c 24193 2010-11-15 07:31:12Z mahendran.p $
 */

/*----------------------------------------------------------------------------
 *        Headers
 *----------------------------------------------------------------------------*/

#include "pal_config.h"
#include "exceptions.h"
#include <cmsis/core_cm3.h>

/*----------------------------------------------------------------------------
 *        Exported variables
 *----------------------------------------------------------------------------*/

/* Stack top */
extern uint32_t _estack;

/* Initialize segments */
extern uint32_t _sfixed;
extern uint32_t _sfixed;
extern uint32_t _efixed;
extern uint32_t _srelocate;
extern uint32_t _erelocate;
extern uint32_t _szero;
extern uint32_t _ezero;

/*----------------------------------------------------------------------------
 *        Definitions
 *----------------------------------------------------------------------------*/

/* The mask of VTOR register */
#define SCB_VTOR_MASK   0x3FFFFF80

/*----------------------------------------------------------------------------
 *        ProtoTypes
 *----------------------------------------------------------------------------*/

extern int main(void);
void ResetException(void);

/*----------------------------------------------------------------------------
 *        Local variables
 *----------------------------------------------------------------------------*/

/* Exception Table */
__attribute__((section(".vectors")))
IntFunc exception_table[] = {

    /* Configure Initial Stack Pointer, using linker-generated symbols */
    (IntFunc)&_estack,
    ResetException,

    NMI_Handler,
    HardFault_Handler,
    MemManage_Handler,
    BusFault_Handler,
    UsageFault_Handler,
    0, 0, 0, 0,         /* Reserved */
    SVC_Handler,
    DebugMon_Handler,
    0,                  /* Reserved  */
    PendSV_Handler,
    SysTick_Handler,

    /* Configurable interrupts  */
    SUPC_IrqHandler,    /* 0  Supply Controller */
    RSTC_IrqHandler,    /* 1  Reset Controller */
    RTC_IrqHandler,     /* 2  Real Time Clock */
    RTT_IrqHandler,     /* 3  Real Time Timer */
    WDT_IrqHandler,     /* 4  Watchdog Timer */
    PMC_IrqHandler,     /* 5  PMC */
    EEFC_IrqHandler,    /* 6  EEFC */
    IrqHandlerNotUsed,  /* 7  Reserved */
    UART0_IrqHandler,   /* 8  UART0 */
    UART1_IrqHandler,   /* 9  UART1 */
    SMC_IrqHandler,     /* 10 SMC */
    PIOA_IrqHandler,    /* 11 Parallel IO Controller A */
    PIOB_IrqHandler,    /* 12 Parallel IO Controller B */
    PIOC_IrqHandler,    /* 13 Parallel IO Controller C */
    USART0_IrqHandler,  /* 14 USART 0 */
    USART1_IrqHandler,  /* 15 USART 1 */
    IrqHandlerNotUsed,  /* 16 Reserved */
    IrqHandlerNotUsed,  /* 17 Reserved */
    MCI_IrqHandler,     /* 18 MCI */
    TWI0_IrqHandler,    /* 19 TWI 0 */
    TWI1_IrqHandler,    /* 20 TWI 1 */
    SPI_IrqHandler,     /* 21 SPI */
    SSC_IrqHandler,     /* 22 SSC */
    TC0_IrqHandler,     /* 23 Timer Counter 0 */
    TC1_IrqHandler,     /* 24 Timer Counter 1 */
    TC2_IrqHandler,     /* 25 Timer Counter 2 */
    TC3_IrqHandler,     /* 26 Timer Counter 3 */
    TC4_IrqHandler,     /* 27 Timer Counter 4 */
    TC5_IrqHandler,     /* 28 Timer Counter 5 */
    ADC_IrqHandler,     /* 29 ADC controller */
    DAC_IrqHandler,     /* 30 DAC controller */
    PWM_IrqHandler,     /* 31 PWM */
    CRCCU_IrqHandler,   /* 32 CRC Calculation Unit */
    ACC_IrqHandler,     /* 33 Analog Comparator */
    USBD_IrqHandler,    /* 34 USB Device Port */
    IrqHandlerNotUsed   /* 35 not used */
};

/*----------------------------------------------------------------------------
 *        Exported functions
 *----------------------------------------------------------------------------*/

/**
 * \brief This is the code that gets called on processor reset.
 * To initialize the device, and call the main() routine.
 */
void ResetException(void)
{
    uint32_t *pSrc, *pDest;

    LowLevelInit();

    /* Initialize the relocate segment */
    pSrc = &_efixed;
    pDest = &_srelocate;
    if (pSrc != pDest) {
        for(; pDest < &_erelocate;) {

            *pDest++ = *pSrc++;
        }
    }

    /* Clear the zero segment */
    for(pDest = &_szero; pDest < &_ezero;) {

        *pDest++ = 0;
    }

    /* Set the vector table base address */
    pSrc = (uint32_t *)&_sfixed;
    SCB->VTOR = ((uint32_t)(pSrc)) & SCB_VTOR_MASK;

    /* Branch to main function */
    main();

    /* Infinite loop */
    while(1);
}
