📄 startup.s
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;/****************************************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: LinEnqiang
;** Modified date: 2007-07-01
;** Version: 1.05
;** Descriptions: For MiniARM2300
;**------------------------------------------------------------------------------------------------------
;** Modified by: LinEnqiang
;** Modified date: 2007-10-25
;** Version: 1.06
;** Descriptions: For MiniARM2300
;**
;********************************************************************************************************/
;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 9*8 ;every layer need 9 bytes stack , permit 8 layer .每层嵌套需要9个字堆栈，允许8层嵌套
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
VICVectAddr0 EQU 0xfffff100
VICVectAddr EQU 0xffffff00
VICVectPri0 EQU 0xfffff200
VICIntEnable EQU 0xfffff010
VICIntEnClr EQU 0xfffff014
VICIntSelect EQU 0xfffff00c
VICProtection EQU 0xFFFFF020
;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
IMPORT __use_no_semihosting_swi
IMPORT __use_two_region_memory
IMPORT SoftwareInterrupt
IMPORT RunFirst
IMPORT VICControl
;The emported labels
;给外部使用的标号在这声明
EXPORT Reset
EXPORT StackUsr
EXPORT InitStack
EXPORT bottom_of_heap
EXPORT __user_initial_stackheap
CODE32
AREA vectors,CODE,READONLY
ENTRY
;interrupt vectors
;中断向量表
;RunFirst
Reset
LDR PC, ResetAddr
LDR PC, UndefinedAddrA
LDR PC, SWI_Addr
LDR PC, PrefetchAddrA
LDR PC, DataAbortAddrA
DCD 0xB8A06F58
LDR PC, IRQ_Addr
LDR PC, FIQ_Addr
ResetAddr DCD ResetInit
UndefinedAddrA DCD Undefined
SWI_Addr DCD SoftwareInterruptAdd
PrefetchAddrA DCD PrefetchAbort
DataAbortAddrA DCD DataAbort
Nouse DCD 0
IRQ_Addr DCD IRQ_Handler
FIQ_Addr DCD FIQ_Handler
Undefined
B .
PrefetchAbort
B .
DataAbort
B .
SoftwareInterruptAdd
CMP R0, #0x100
BLO SoftwareInterrupt
B VICControl
;IRQ中断
MACRO
ISR
; 调用c语言的中断处理程序
LDR R2, =VICVectAddr
LDR R3, [R2]
MOV LR, PC
BX R3
MEND
INCLUDE irq.inc ; Inport the head file 引入头文件
IRQ_Handler HANDLER
;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: 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 RunFirst
BL InitStack ; Initialize the stack 初始化堆栈
BL TargetResetInit ; Initialize the target board 目标板基本初始化
; Jump to the entry point of C program 跳转到c语言入口
B __main
;/*********************************************************************************************************
;** 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, #0xd0
LDR SP, =StackUsr
MOV PC, R0
;/*********************************************************************************************************
;** 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
LDR R2, =top_of_heap
LDR R3, =bottom_of_Stacks
MOV PC, LR
LTORG
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
EXPORT _sys_exit
_sys_exit
B .
EXPORT __rt_div0
EXPORT fputc
EXPORT fgetc
EXPORT _sys_close
EXPORT _sys_write
EXPORT _sys_read
; EXPORT _ttywrch
EXPORT _sys_istty
EXPORT _sys_seek
EXPORT _sys_ensure
EXPORT _sys_flen
EXPORT _sys_tmpnam
EXPORT _sys_command_string
__rt_div0
fputc
fgetc
_sys_close
_sys_write
_sys_read
;_ttywrch
_sys_istty
_sys_seek
_sys_ensure
_sys_flen
_sys_tmpnam
_sys_command_string
MOV R0, #0
MOV PC, LR
;/*********************************************************************************************************
;** 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 . >= 0x1fc
IF :DEF: EN_CRP
INFO 1,"\nThe data at 0x000001fc must be 0x87654321.\nPlease delete some source before this line."
ELSE
INFO 1,"\nThe data at 0x000001fc must be 0xffffffff.\nPlease delete some source before this line."
ENDIF
ENDIF
CrpData
WHILE . < 0x1fc
NOP
WEND
CrpData1
IF :DEF: EN_CRP
DCD 0x87654321 ;/*When the Data is 0x87654321,user code be not protected. 当此数为0x87654321时，用户程序被保护 */
ELSE
DCD 0xffffffff ;/*When the Data is 0xffffffff,user code be not protected. 当此数为0xffffffff时，用户程序不被保护 */
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 StackBottom, DATA, NOINIT
bottom_of_Stacks SPACE 1
AREA HeapTop, DATA, NOINIT
top_of_heap
AREA Stacks, DATA, NOINIT
StackUsr
END
;/*********************************************************************************************************
;** End Of File
;********************************************************************************************************/
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