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QEMU support for XiUOS based on Cortex-M3

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Huang_Yuqing
2021-05-13 12:33:17 +08:00
parent 9fb9a3a2ec
commit a2d278bb04
46 changed files with 68781 additions and 11 deletions
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arch/arm/cortex-m3/boot.c Normal file
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//*****************************************************************************
//
// startup_gcc.c - Startup code for use with GNU tools.
//
// Copyright (c) 2013 Texas Instruments Incorporated. All rights reserved.
// Software License Agreement
//
// 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 following disclaimer.
//
// Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the
// distribution.
//
// Neither the name of Texas Instruments Incorporated nor the names of
// its contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS 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.
//
// This is part of revision 10636 of the Stellaris Firmware Development Package.
//
//*****************************************************************************
/**
* @file boot.c
* @brief derived from Stellaris Firmware Development Package
* @version 1.0
* @author AIIT XUOS Lab
* @date 2021-05-13
*/
/*************************************************
File name: boot.c
Description: Reset and init function
Others:
History:
1. Date: 2021-05-13
Author: AIIT XUOS Lab
Modification:
1. take startup_gcc.c from revision 10636 of the Stellaris Firmware Development Package for XiUOS
*************************************************/
extern unsigned long _sidata;
extern unsigned long _sdata;
extern unsigned long _edata;
extern unsigned long _sbss;
extern unsigned long _ebss;
extern int entry(void);
void
Reset_Handler(void)
{
unsigned long *pulSrc, *pulDest;
//
// Copy the data segment initializers from flash to SRAM.
//
pulSrc = &_sidata;
for(pulDest = &_sdata; pulDest < &_edata; )
{
*pulDest++ = *pulSrc++;
}
//
// Zero fill the bss segment.
//
__asm(" ldr r0, =_sbss\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.
//
entry();
}