Startup.s
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文件大小:11k
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微处理器开发
开发平台:
Windows_Unix
- ;/****************************************Copyright (c)**************************************************
- ;** Guangzou ZLG-MCU Development Co.,LTD.
- ;** graduate school
- ;** http://www.zlgmcu.com
- ;**
- ;**--------------File Info-------------------------------------------------------------------------------
- ;** File name: Startup.s
- ;** Last modified Date: 2004-09-17
- ;** Last Version: 1.0
- ;** Descriptions: The start up codes for LPC2100, including the initializing codes for the entry point of exceptions and the stacks of user tasks.
- ;** Every project should have a independent copy of this file for related modifications
- ;**------------------------------------------------------------------------------------------------------
- ;** Created by: Chenmingji
- ;** Created date: 2004-02-02
- ;** Version: 1.0
- ;** Descriptions: The original version
- ;**
- ;**------------------------------------------------------------------------------------------------------
- ;** Modified by: Chenmingji
- ;** Modified date: 2004-09-17
- ;** Version: 1.01
- ;** Descriptions: Modified the bus setting to adapt for many common situations
- ;**
- ;**------------------------------------------------------------------------------------------------------
- ;** Modified by: Chenmingji
- ;** Modified date: 2004-09-17
- ;** Version: 1.02
- ;** Descriptions: Added codes to support the enciphering of the chip
- ;**
- ;**------------------------------------------------------------------------------------------------------
- ;** Modified by: Chenmingji
- ;** Modified date: 2004-09-17
- ;** Version: 1.04
- ;** Descriptions: Renewed the template, added codes to support more compilers
- ;**
- ;**------------------------------------------------------------------------------------------------------
- ;** Modified by: Chenxibing
- ;** Modified date: 2004-12-09
- ;** Version: 1.05
- ;** Descriptions:
- ;**
- ;********************************************************************************************************/
- ;define the stack size
- ;定义堆栈的大小
- SVC_STACK_LEGTH EQU 0
- FIQ_STACK_LEGTH EQU 0
- IRQ_STACK_LEGTH EQU 256
- ABT_STACK_LEGTH EQU 0
- UND_STACK_LEGTH EQU 0
- NoInt EQU 0x80
- NoFIQ EQU 0x40
- USR32Mode EQU 0x10
- SVC32Mode EQU 0x13
- SYS32Mode EQU 0x1f
- IRQ32Mode EQU 0x12
- FIQ32Mode EQU 0x11
- IMPORT __use_no_semihosting_swi
- ;The imported labels
- ;引入的外部标号在这声明
- IMPORT FIQ_Exception ;Fast interrupt exceptions handler 快速中断异常处理程序
- IMPORT __main ;The entry point to the main function C语言主程序入口
- IMPORT TargetResetInit ;initialize the target board 目标板基本初始化
- ;The emported labels
- ;给外部使用的标号在这声明
- EXPORT bottom_of_heap
- EXPORT StackUsr
- EXPORT Reset
- EXPORT __user_initial_stackheap
- CODE32
- AREA vectors,CODE,READONLY
- ENTRY
- ;interrupt vectors
- ;中断向量表
- Reset
- LDR PC, ResetAddr
- LDR PC, UndefinedAddr
- LDR PC, SWI_Addr
- LDR PC, PrefetchAddr
- LDR PC, DataAbortAddr
- DCD 0xb9205f80
- LDR PC, [PC, #-0xff0]
- LDR PC, FIQ_Addr
- ResetAddr DCD ResetInit
- UndefinedAddr DCD Undefined
- SWI_Addr DCD SoftwareInterrupt
- PrefetchAddr DCD PrefetchAbort
- DataAbortAddr DCD DataAbort
- Nouse DCD 0
- IRQ_Addr DCD 0
- FIQ_Addr DCD FIQ_Handler
- ;未定义指令
- Undefined
- B Undefined
- ;软中断
- SoftwareInterrupt
- ; B SoftwareInterrupt
- ;//增加开/关中断处理 Chenxibing-2004-02-09
- CMP R0, #4
- LDRLO PC, [PC, R0, LSL #2]
- MOVS PC, LR
- SwiFunction
- DCD IRQDisable ;0
- DCD IRQEnable ;1
- DCD FIQDisable ;2
- DCD FIQEnable ;3
- IRQDisable
- ;关IRQ中断
- MRS R0, SPSR
- ORR R0, R0, #NoInt
- MSR SPSR_c, R0
- MOVS PC, LR
- IRQEnable
- ;开IRQ中断
- MRS R0, SPSR
- BIC R0, R0, #NoInt
- MSR SPSR_c, R0
- MOVS PC, LR
- FIQDisable
- ;关FIQ中断
- MRS R0, SPSR
- ORR R0, R0, #NoFIQ
- MSR SPSR_c, R0
- MOVS PC, LR
- FIQEnable
- ;开FIQ中断
- MRS R0, SPSR
- BIC R0, R0, #NoFIQ
- MSR SPSR_c, R0
- MOVS PC, LR
- ;// Changed 2004-12-09
- ;取指令中止
- PrefetchAbort
- B PrefetchAbort
- ;取数据中止
- DataAbort
- B DataAbort
- ;快速中断
- FIQ_Handler
- STMFD SP!, {R0-R3, LR}
- BL FIQ_Exception
- LDMFD SP!, {R0-R3, LR}
- SUBS PC, LR, #4
- ;/*********************************************************************************************************
- ;** unction name 函数名称: InitStack
- ;** Descriptions 功能描述: Initialize the stacks 初始化堆栈
- ;** input parameters 输 入: None 无
- ;** Returned value 输 出 : None 无
- ;** Used global variables 全局变量: None 无
- ;** Calling modules 调用模块: None 无
- ;**
- ;** Created by 作 者: Chenmingji 陈明计
- ;** Created Date 日 期: 2004/02/02 2004年2月2日
- ;**-------------------------------------------------------------------------------------------------------
- ;** Modified by 修 改:
- ;** Modified date 日 期:
- ;**-------------------------------------------------------------------------------------------------------
- ;********************************************************************************************************/
- InitStack
- MOV R0, LR
- ;Build the SVC stack
- ;设置管理模式堆栈
- MSR CPSR_c, #0xd3
- LDR SP, StackSvc
- ;Build the IRQ stack
- ;设置中断模式堆栈
- MSR CPSR_c, #0xd2
- LDR SP, StackIrq
- ;Build the FIQ stack
- ;设置快速中断模式堆栈
- MSR CPSR_c, #0xd1
- LDR SP, StackFiq
- ;Build the DATAABORT stack
- ;设置中止模式堆栈
- MSR CPSR_c, #0xd7
- LDR SP, StackAbt
- ;Build the UDF stack
- ;设置未定义模式堆栈
- MSR CPSR_c, #0xdb
- LDR SP, StackUnd
- ;Build the SYS stack
- ;设置系统模式堆栈
- MSR CPSR_c, #0xdf
- LDR SP, =StackUsr
- MOV PC, R0
- ;/*********************************************************************************************************
- ;** unction name 函数名称: ResetInit
- ;** Descriptions 功能描述: RESET 复位入口
- ;** input parameters 输 入: None 无
- ;** Returned value 输 出 : None 无
- ;** Used global variables 全局变量: None 无
- ;** Calling modules 调用模块: None 无
- ;**
- ;** Created by 作 者: Chenmingji 陈明计
- ;** Created Date 日 期: 2004/02/02 2004年2月2日
- ;**-------------------------------------------------------------------------------------------------------
- ;** Modified by 修 改: Chenmingji 陈明计
- ;** Modified date 日 期: 2004/02/02 2004年3月3日
- ;**-------------------------------------------------------------------------------------------------------
- ;********************************************************************************************************/
- ResetInit
- BL InitStack ;初始化堆栈 Initialize the stack
- BL TargetResetInit ;目标板基本初始化 Initialize the target board
- ;跳转到c语言入口 Jump to the entry point of C program
- B __main
- ;/*********************************************************************************************************
- ;** unction name 函数名称: __user_initial_stackheap
- ;** Descriptions 功能描述: Initial the function library stacks and heaps, can not deleted! 库函数初始化堆和栈,不能删除
- ;** input parameters 输 入: reference by function library 参考库函数手册
- ;** Returned value 输 出 : reference by function library 参考库函数手册
- ;** Used global variables 全局变量: None 无
- ;** Calling modules 调用模块: None 无
- ;**
- ;** Created by 作 者: Chenmingji 陈明计
- ;** Created Date 日 期: 2004/02/02 2004年2月2日
- ;**-------------------------------------------------------------------------------------------------------
- ;** Modified by
- ;** Modified date
- ;**-------------------------------------------------------------------------------------------------------
- ;********************************************************************************************************/
- __user_initial_stackheap
- LDR r0,=bottom_of_heap
- ; LDR r1,=StackUsr
- MOV pc,lr
- StackSvc DCD SvcStackSpace + (SVC_STACK_LEGTH - 1)* 4
- StackIrq DCD IrqStackSpace + (IRQ_STACK_LEGTH - 1)* 4
- StackFiq DCD FiqStackSpace + (FIQ_STACK_LEGTH - 1)* 4
- StackAbt DCD AbtStackSpace + (ABT_STACK_LEGTH - 1)* 4
- StackUnd DCD UndtStackSpace + (UND_STACK_LEGTH - 1)* 4
- ;/*********************************************************************************************************
- ;** unction name 函数名称: CrpData
- ;** Descriptions 功能描述: encrypt the chip
- ;** input parameters 输 入: None 无
- ;** Returned value 输 出 : None 无
- ;** Used global variables 全局变量: None 无
- ;** Calling modules 调用模块: None 无
- ;**
- ;** Created by 作 者: Chenmingji 陈明计
- ;** Created Date 日 期: 2004/03/27 2004年3月27日
- ;**-------------------------------------------------------------------------------------------------------
- ;** Modified by 修 改:
- ;** Modified date 日 期:
- ;**-------------------------------------------------------------------------------------------------------
- ;********************************************************************************************************/
- IF :DEF: EN_CRP
- IF . >= 0x1fc
- INFO 1,"nThe data at 0x000001fc must be 0x87654321.nPlease delete some source before this line."
- ENDIF
- CrpData
- WHILE . < 0x1fc
- NOP
- WEND
- CrpData1
- DCD 0x87654321 ;/*When the Data is 为0x87654321,user code be protected. 当此数为0x87654321时,用户程序被保护 */
- ENDIF
- ;/* 分配堆栈空间 */
- AREA MyStacks, DATA, NOINIT, ALIGN=2
- SvcStackSpace SPACE SVC_STACK_LEGTH * 4 ;Stack spaces for Administration Mode 管理模式堆栈空间
- IrqStackSpace SPACE IRQ_STACK_LEGTH * 4 ;Stack spaces for Interrupt ReQuest Mode 中断模式堆栈空间
- FiqStackSpace SPACE FIQ_STACK_LEGTH * 4 ;Stack spaces for Fast Interrupt reQuest Mode 快速中断模式堆栈空间
- AbtStackSpace SPACE ABT_STACK_LEGTH * 4 ;Stack spaces for Suspend Mode 中止义模式堆栈空间
- UndtStackSpace SPACE UND_STACK_LEGTH * 4 ;Stack spaces for Undefined Mode 未定义模式堆栈
- AREA Heap, DATA, NOINIT
- bottom_of_heap SPACE 1
- AREA Stacks, DATA, NOINIT
- StackUsr
- END
- ;/*********************************************************************************************************
- ;** End Of File
- ;********************************************************************************************************/