startup.s

CC1000 Rf modem C codes for philips sLpc213X ARM MCU.

;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
            
;/*****************************************************************/
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

;//////////////////////////////////////////////////////////////////
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

__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

;/****************************************************************/
    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