Adjust directory structure

2021-06-03 17:38:11 +08:00
parent 92301257f3
commit 89a2236b18
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+/**
+  ******************************************************************************
+  * @file      startup_stm32f407xx.s
+  * @author    MCD Application Team
+  * @brief     STM32F407xx Devices vector table for GCC based toolchains. 
+  *            This module performs:
+  *                - Set the initial SP
+  *                - Set the initial PC == Reset_Handler,
+  *                - Set the vector table entries with the exceptions ISR address
+  *                - Branches to main in the C library (which eventually
+  *                  calls main()).
+  *            After Reset the Cortex-M4 processor is in Thread mode,
+  *            priority is Privileged, and the Stack is set to Main.
+  ******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; COPYRIGHT 2017 STMicroelectronics</center></h2>
+  *
+  * Redistribution and use in source and binary forms, with or without modification,
+  * are permitted provided that the following conditions are met:
+  *   1. Redistributions of source code must retain the above copyright notice,
+  *      this list of conditions and the following disclaimer.
+  *   2. 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.
+  *   3. Neither the name of STMicroelectronics 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 HOLDER 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.
+  *
+  ******************************************************************************
+  */
+
+/**
+* @file boot.S
+* @brief derived from ST standard peripheral library
+* @version 1.0 
+* @author AIIT XUOS Lab
+* @date 2021-04-25
+*/
+
+/*************************************************
+File name: boot.S
+Description: Reset and init function
+Others: 
+History: 
+1. Date: 2021-04-29
+Author: AIIT XUOS Lab
+Modification: 
+1. take startup_stm32f407xx.s for XiUOS
+*************************************************/
+
+  .syntax unified
+  .cpu cortex-m4
+  .fpu softvfp
+  .thumb
+
+.word  _sidata
+.word  _sdata
+.word  _edata
+.word  __bss_start
+.word  __bss_end
+
+  .section  .text.Reset_Handler
+  .weak  Reset_Handler
+  .type  Reset_Handler, %function
+Reset_Handler:
+  ldr   sp, =__stack_tp
+  movs  r1, #0
+
+/* Copy the data segment initializers from flash to SRAM */
+DataInit:
+  ldr  r0, =_sdata
+  ldr  r3, =_edata
+  adds r2, r0, r1
+  cmp  r2, r3
+  bcs  DataInitEnd
+  ldr  r3, =_sidata
+  ldr  r3, [r3, r1]
+  str  r3, [r0, r1]
+  adds r1, r1, #4
+  b  DataInit
+
+DataInitEnd:
+  ldr  r2, =__bss_start
+
+/* Zero fill the bss segment. */
+BSSInit:
+  ldr  r3, = __bss_end
+  cmp  r2, r3
+  bcs  BSSInitEnd
+  movs r3, #0
+  str  r3, [r2], #4
+  b  BSSInit
+
+BSSInitEnd:
+  bl  SystemInit
+  bl  stm32f407_start
+  bx  lr
+.size  Reset_Handler, .-Reset_Handler