// DOM-IGNORE-BEGIN
/*******************************************************************************
* Copyright (C) 2018 Microchip Technology Inc. and its subsidiaries.
*
* Subject to your compliance with these terms, you may use Microchip software
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// DOM-IGNORE-END

#include "definitions.h" /* for potential custom handler names */
#include <libpic32c.h>
#include <sys/cdefs.h>
#include <stdbool.h>

/*
 *  The MPLAB X Simulator does not yet support simulation of programming the
 *  GPNVM bits yet. We can remove this once it supports the FRDY bit.
 */
#ifdef __MPLAB_DEBUGGER_SIMULATOR
#define __XC32_SKIP_STARTUP_GPNVM_WAIT
#endif

/*
 *  This startup code relies on features that are specific to the MPLAB XC32
 *  toolchain. Do not use it with other toolchains.
 */
#ifndef __XC32
#warning This startup code is intended for use with the MPLAB XC32 Compiler only.
#endif

/* Initialize segments */
extern uint32_t __svectors;

int main(void);
extern void __attribute__((long_call)) __libc_init_array(void);

/* Device Vector information is available in interrupt.c file */

__STATIC_INLINE void FPU_Enable(void);

#if (__ARM_FP==14) || (__ARM_FP==4)

/* Enable FPU */
__STATIC_INLINE void FPU_Enable(void)
{
    uint32_t prim;
    prim = __get_PRIMASK();
    __disable_irq();

     SCB->CPACR |= (0xFu << 20);
    __DSB();
    __ISB();

    if (!prim)
    {
        __enable_irq();
    }
}
#endif /* (__ARM_FP==14) || (__ARM_FP==4) */
__STATIC_INLINE void TCM_Disable(void);
__STATIC_INLINE void TCM_Enable(void);
__STATIC_INLINE void TCM_Configure(uint32_t tcmSize);
__STATIC_INLINE void ICache_Enable(void);
__STATIC_INLINE void DCache_Enable(void);

/** Program CMCC CSIZESW bits for TCM and cache configuration */
__STATIC_INLINE void TCM_Configure(uint32_t tcmSize)
{
    CMCC_REGS->CMCC_CFG = CMCC_CFG_CSIZESW(tcmSize);
}

/** Enable TCM memory */
__STATIC_INLINE void  __attribute__((optimize("-O1"))) TCM_Enable(void)
{
    /* TCM cannot be enabled or disabled in SAME5x/SAMD5x family*/
}

/* Disable TCM memory */
__STATIC_INLINE void  __attribute__((optimize("-O1"))) TCM_Disable(void)
{
    /* TCM cannot be enabled or disabled in SAME5x/SAMD5x family*/
}

__STATIC_INLINE void ICache_Enable(void)
{
    CMCC_REGS->CMCC_CTRL &= ~(CMCC_CTRL_CEN_Msk);
    while((CMCC_REGS->CMCC_SR & CMCC_SR_CSTS_Msk) == CMCC_SR_CSTS_Msk)
    {
        /*Wait for the operation to complete*/
    }
    CMCC_REGS->CMCC_CFG |= (CMCC_CFG_DCDIS_Msk);
    CMCC_REGS->CMCC_CTRL = (CMCC_CTRL_CEN_Msk);
}

__STATIC_INLINE void DCache_Enable(void)
{
}
/* Optional application-provided functions */
extern void __attribute__((weak,long_call)) _on_reset(void);
extern void __attribute__((weak,long_call)) _on_bootstrap(void);

/* Reserved for use by the MPLAB XC32 Compiler */
extern void __attribute__((weak,long_call)) __xc32_on_reset(void);
extern void __attribute__((weak,long_call)) __xc32_on_bootstrap(void);


/**
 * \brief This is the code that gets called on processor reset.
 * To initialize the device, and call the main() routine.
 */
void __attribute__((optimize("-O1"), section(".text.Reset_Handler"), long_call, noreturn)) Reset_Handler(void)
{
#ifdef SCB_VTOR_TBLOFF_Msk
    uint32_t *pSrc;
#endif

#if defined (__REINIT_STACK_POINTER)
    /* Initialize SP from linker-defined _stack symbol. */
    __asm__ volatile ("ldr sp, =_stack" : : : "sp");

#ifdef SCB_VTOR_TBLOFF_Msk
    /* Buy stack for locals */
    __asm__ volatile ("sub sp, sp, #8" : : : "sp");
#endif
    __asm__ volatile ("add r7, sp, #0" : : : "r7");
#endif


    /* Call the optional application-provided _on_reset() function. */
    if (_on_reset)
    {
        _on_reset();
    }

    /* Reserved for use by MPLAB XC32. */
    if (__xc32_on_reset)
        __xc32_on_reset();

#if (__ARM_FP==14) || (__ARM_FP==4)
    /* Enable the FPU if the application is built with -mfloat-abi=softfp or -mfloat-abi=hard */
    FPU_Enable();
#endif


    TCM_Configure(2);

    /* Enable TCM   */
    TCM_Enable();

    /* Initialize data after TCM is enabled.
     * Data initialization from the XC32 .dinit template */
    __pic32c_data_initialization();


#  ifdef SCB_VTOR_TBLOFF_Msk
    /*  Set the vector-table base address in FLASH */
    pSrc = (uint32_t *) & __svectors;
    SCB->VTOR = ((uint32_t) pSrc & SCB_VTOR_TBLOFF_Msk);
#  endif /* SCB_VTOR_TBLOFF_Msk */

    /* Initialize the C library */
    __libc_init_array();


    /* Enable Instruction Cache */
    ICache_Enable();


    /* Call the optional application-provided _on_bootstrap() function. */
    if (_on_bootstrap)
    {
        _on_bootstrap();
    }

    /* Reserved for use by MPLAB XC32. */
    if (__xc32_on_bootstrap)
    {
        __xc32_on_bootstrap();
    }

    /* Branch to application's main function */
    main();

#if (defined(__DEBUG) || defined(__DEBUG_D)) && defined(__XC32)
    __builtin_software_breakpoint();
#endif
    /* Infinite loop */
    while (1) {}
}
