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

//

// startup.c - Boot code for Stellaris.

//

// Copyright (c) 2005,2006 Luminary Micro, Inc.  All rights reserved.

//

// Software License Agreement

//

// Luminary Micro, Inc. (LMI) is supplying this software for use solely and

// exclusively on LMI's Stellaris Family of microcontroller products.

//

// The software is owned by LMI and/or its suppliers, and is protected under

// applicable copyright laws.  All rights are reserved.  Any use in violation

// of the foregoing restrictions may subject the user to criminal sanctions

// under applicable laws, as well as to civil liability for the breach of the

// terms and conditions of this license.

//

// THIS SOFTWARE IS PROVIDED "AS IS".  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.

// LMI SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR

// CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.

//

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

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

//

// Forward declaration of the default fault handlers.

//

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

void ResetISR(void);

static void NmiSR(void);

void FaultISR(void);

extern void xPortPendSVHandler(void);

extern void xPortSysTickHandler(void);

extern void vUART_ISR( void );

extern void vPortSVCHandler( void );

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

//

// The entry point for the application.

//

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

extern void entry(void);

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

//

// Reserve space for the system stack.

//

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

#ifndef STACK_SIZE

#define STACK_SIZE                              51

#endif

static unsigned long pulMainStack[STACK_SIZE];

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

//

// The minimal vector table for a Cortex M3.  Note that the proper constructs

// must be placed on this to ensure that it ends up at physical address

// 0x0000.0000.

//

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

__attribute__ ((section("vectors")))

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

{

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

    ResetISR,

    NmiSR,

    FaultISR,                                                           //FAULT

    0,                                      // The MPU fault handler

    0,                                      // The bus fault handler

    0,                                      // The usage fault handler

    0,                                      // Reserved

    0,                                      // Reserved

    0,                                      // Reserved

    0,                                      // Reserved

    vPortSVCHandler,                                            // SVCall handler

    0,                                      // Debug monitor handler

    0,                                      // Reserved

    xPortPendSVHandler,                     // The PendSV handler

    xPortSysTickHandler,                    // The SysTick handler

    0,                      // GPIO Port A

    0,                      // GPIO Port B

    0,                      // GPIO Port C

    0,                      // GPIO Port D

    0,                      // GPIO Port E

    vUART_ISR                      // UART0 Rx and Tx

};

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

//

// 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.

    //

    for(pulDest = &_bss; pulDest < &_ebss; )

    {

        *pulDest++ = 0;

    }

    //

    // 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.

//

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

void

FaultISR(void)

{

    //

    // Enter an infinite loop.

    //

    while(1)

    {

    }

}