//*****************************************************************************

//

// startup_gcc.c - Startup code for use with GNU tools.

//

// Copyright (c) 2007-2013 Texas Instruments Incorporated.  All rights reserved.

// Software License Agreement

// 

// Texas Instruments (TI) is supplying this software for use solely and

// exclusively on TI's microcontroller products. The software is owned by

// TI and/or its suppliers, and is protected under applicable copyright

// laws. You may not combine this software with "viral" open-source

// software in order to form a larger program.

// 

// THIS SOFTWARE IS PROVIDED "AS IS" AND WITH ALL FAULTS.

// NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT

// NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

// A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. TI SHALL NOT, UNDER ANY

// CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL

// DAMAGES, FOR ANY REASON WHATSOEVER.

// 

// This is part of revision 10636 of the EK-LM3S8962 Firmware Package.

//

//*****************************************************************************



//*****************************************************************************

//

// Forward declaration of the default fault handlers.

//

//*****************************************************************************

void ResetISR(void);

static void NmiSR(void);

static void FaultISR(void);

static void IntDefaultHandler(void);



//*****************************************************************************

//

// External declarations for the interrupt handlers used by the application.

//

//*****************************************************************************

extern void CANHandler(void);

extern void lwIPEthernetIntHandler(void);

extern void SysTickIntHandler(void);



//*****************************************************************************

//

// The entry point for the application.

//

//*****************************************************************************

extern int main(void);



//*****************************************************************************

//

// Reserve space for the system stack.

//

//*****************************************************************************

static unsigned long pulStack[256];



//*****************************************************************************

//

// The vector table.  Note that the proper constructs must be placed on this to

// ensure that it ends up at physical address 0x0000.0000.

//

//*****************************************************************************

__attribute__ ((section(".isr_vector")))

void (* const g_pfnVectors[])(void) =

{

    (void (*)(void))((unsigned long)pulStack + sizeof(pulStack)),

                                            // The initial stack pointer

    ResetISR,                               // The reset handler

    NmiSR,                                  // The NMI handler

    FaultISR,                               // The hard fault handler

    IntDefaultHandler,                      // The MPU fault handler

    IntDefaultHandler,                      // The bus fault handler

    IntDefaultHandler,                      // The usage fault handler

    0,                                      // Reserved

    0,                                      // Reserved

    0,                                      // Reserved

    0,                                      // Reserved

    IntDefaultHandler,                      // SVCall handler

    IntDefaultHandler,                      // Debug monitor handler

    0,                                      // Reserved

    IntDefaultHandler,                      // The PendSV handler

    SysTickIntHandler,                      // The SysTick handler

    IntDefaultHandler,                      // GPIO Port A

    IntDefaultHandler,                      // GPIO Port B

    IntDefaultHandler,                      // GPIO Port C

    IntDefaultHandler,                      // GPIO Port D

    IntDefaultHandler,                      // GPIO Port E

    IntDefaultHandler,                      // UART0 Rx and Tx

    IntDefaultHandler,                      // UART1 Rx and Tx

    IntDefaultHandler,                      // SSI0 Rx and Tx

    IntDefaultHandler,                      // I2C0 Master and Slave

    IntDefaultHandler,                      // PWM Fault

    IntDefaultHandler,                      // PWM Generator 0

    IntDefaultHandler,                      // PWM Generator 1

    IntDefaultHandler,                      // PWM Generator 2

    IntDefaultHandler,                      // Quadrature Encoder 0

    IntDefaultHandler,                      // ADC Sequence 0

    IntDefaultHandler,                      // ADC Sequence 1

    IntDefaultHandler,                      // ADC Sequence 2

    IntDefaultHandler,                      // ADC Sequence 3

    IntDefaultHandler,                      // Watchdog timer

    IntDefaultHandler,                      // Timer 0 subtimer A

    IntDefaultHandler,                      // Timer 0 subtimer B

    IntDefaultHandler,                      // Timer 1 subtimer A

    IntDefaultHandler,                      // Timer 1 subtimer B

    IntDefaultHandler,                      // Timer 2 subtimer A

    IntDefaultHandler,                      // Timer 2 subtimer B

    IntDefaultHandler,                      // Analog Comparator 0

    IntDefaultHandler,                      // Analog Comparator 1

    IntDefaultHandler,                      // Analog Comparator 2

    IntDefaultHandler,                      // System Control (PLL, OSC, BO)

    IntDefaultHandler,                      // FLASH Control

    IntDefaultHandler,                      // GPIO Port F

    IntDefaultHandler,                      // GPIO Port G

    IntDefaultHandler,                      // GPIO Port H

    IntDefaultHandler,                      // UART2 Rx and Tx

    IntDefaultHandler,                      // SSI1 Rx and Tx

    IntDefaultHandler,                      // Timer 3 subtimer A

    IntDefaultHandler,                      // Timer 3 subtimer B

    IntDefaultHandler,                      // I2C1 Master and Slave

    IntDefaultHandler,                      // Quadrature Encoder 1

    CANHandler,                             // CAN0

    IntDefaultHandler,                      // CAN1

    IntDefaultHandler,                      // CAN2

    lwIPEthernetIntHandler,                 // Ethernet

    IntDefaultHandler                       // Hibernate

};



//*****************************************************************************

//

// The following are constructs created by the linker, indicating where the

// the "data" and "bss" segments reside in memory.  The initializers for the

// for the "data" segment resides immediately following the "text" segment.

//

//*****************************************************************************

extern unsigned long _etext;

extern unsigned long _data;

extern unsigned long _edata;

extern unsigned long _bss;

extern unsigned long _ebss;



//*****************************************************************************

//

// This is the code that gets called when the processor first starts execution

// following a reset event.  Only the absolutely necessary set is performed,

// after which the application supplied entry() routine is called.  Any fancy

// actions (such as making decisions based on the reset cause register, and

// resetting the bits in that register) are left solely in the hands of the

// application.

//

//*****************************************************************************

void

ResetISR(void)

{

    unsigned long *pulSrc, *pulDest;



    //

    // Copy the data segment initializers from flash to SRAM.

    //

    pulSrc = &_etext;

    for(pulDest = &_data; pulDest < &_edata; )

    {

        *pulDest++ = *pulSrc++;

    }



    //

    // Zero fill the bss segment.

    //

    __asm("    ldr     r0, =_bss\n"

          "    ldr     r1, =_ebss\n"

          "    mov     r2, #0\n"

          "    .thumb_func\n"

          "zero_loop:\n"

          "        cmp     r0, r1\n"

          "        it      lt\n"

          "        strlt   r2, [r0], #4\n"

          "        blt     zero_loop");



    //

    // Call the application's entry point.

    //

    main();

}



//*****************************************************************************

//

// This is the code that gets called when the processor receives a NMI.  This

// simply enters an infinite loop, preserving the system state for examination

// by a debugger.

//

//*****************************************************************************

static void

NmiSR(void)

{

    //

    // Enter an infinite loop.

    //

    while(1)

    {

    }

}



//*****************************************************************************

//

// This is the code that gets called when the processor receives a fault

// interrupt.  This simply enters an infinite loop, preserving the system state

// for examination by a debugger.

//

//*****************************************************************************

static void

FaultISR(void)

{

    //

    // Enter an infinite loop.

    //

    while(1)

    {

    }

}



//*****************************************************************************

//

// This is the code that gets called when the processor receives an unexpected

// interrupt.  This simply enters an infinite loop, preserving the system state

// for examination by a debugger.

//

//*****************************************************************************

static void

IntDefaultHandler(void)

{

    //

    // Go into an infinite loop.

    //

    while(1)

    {

    }

}