程序代码.docx

程序代码.docx

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程序代码

;/*

;************************************************************************************************************

;*北京精仪达盛科技有限公司

;*研发部

;*

;*

;*

;*---------------------------------------------文件信息----------------------------------------------------

;*

;*文件名称:

2410INIT.S

;*文件功能:

S3C2410启动代码，配置存储器，ISR，堆栈，初始化C向量地址

;*补充说明:

;*--------------------------------------------最新版本信息-------------------------------------------------

;*修改作者:

ARM开发小组

;*修改日期:

2004/00/00

;*版本声明:

V0.1

;*--------------------------------------------历史版本信息-------------------------------------------------

;*文件作者:

kwtark（samsung）

;*创建日期:

2002/02/25

;*版本声明:

ver0.0

;2002/03/20:

purnnamu:

AddsomefunctionsfortestingSTOP,POWER_OFFmode

;2002/04/10:

SJS:

subinterruptdisable0x3ff->0x7ff

;*-----------------------------------------------------------------------------------------------------------

;*************************************************************************************************************

;*/

GET2410addr.s

GETmemcfg.s

BIT_SELFREFRESHEQU（1<<22）

;//Pre-definedconstants

USERMODEEQU0x10

FIQMODEEQU0x11

IRQMODEEQU0x12

SVCMODEEQU0x13

ABORTMODEEQU0x17

UNDEFMODEEQU0x1b

MODEMASKEQU0x1f

NOINTEQU0xc0

;//Thelocationofstacks

UserStackEQU（_STACK_BASEADDRESS-0x3800）;//0x33ff4800~

SVCStackEQU（_STACK_BASEADDRESS-0x2800）;//0x33ff5800~

UndefStackEQU（_STACK_BASEADDRESS-0x2400）;//0x33ff5c00~

AbortStackEQU（_STACK_BASEADDRESS-0x2000）;//0x33ff6000~

IRQStackEQU（_STACK_BASEADDRESS-0x1000）;//0x33ff7000~

FIQStackEQU（_STACK_BASEADDRESS-0x0）;//0x33ff8000~

;//Checkiftasm.exe（armasm-16...@ADS1.0）isused.

GBLLTHUMBCODE

[{CONFIG}=16

THUMBCODESETL{TRUE}

CODE32

|

THUMBCODESETL{FALSE}

]

MACRO

MOV_PC_LR

[THUMBCODE

bxlr

|

movpc,lr

]

MEND

MACRO

MOVEQ_PC_LR

[THUMBCODE

bxeqlr

|

moveqpc,lr

]

MEND

MACRO

$HandlerLabelHANDLER$HandleLabel

$HandlerLabel

subsp,sp,#4;//decrementsp（tostorejumpaddress）

stmfdsp!

{r0};//PUSHtheworkregistertostack（lrdoes'tpushbecauseitreturntooriginaladdress）

ldrr0,=$HandleLabel;//loadtheaddressofHandleXXXtor0

ldrr0,[r0];//loadthecontents（serviceroutinestartaddress）ofHandleXXX

strr0,[sp,#4];//storethecontents（ISR）ofHandleXXXtostack

ldmfdsp!

{r0,pc};//POPtheworkregisterandpc（jumptoISR）

MEND

IMPORT|Image$$RO$$Limit|;//EndofROMcode（=startofROMdata）

IMPORT|Image$$RW$$Base|;//BaseofRAMtoinitialise

IMPORT|Image$$ZI$$Base|;//Baseandlimitofarea

IMPORT|Image$$ZI$$Limit|;//tozeroinitialise

IMPORTMain;//Themainentryofmonprogram

AREAInit,CODE,READONLY

ENTRY

;//1）Thecode,whichconvertstoBig-endian,shouldbeinlittleendiancode.

;//2）ThefollowinglittleendiancodewillbecompiledinBig-Endianmode.

;//Thecodebyteordershouldbechangedasthememorybuswidth.

;//3）Thepseudoinstruction,DCDcan'tbeusedherebecausethelinkergenerateserror.

ASSERT:

DEF:

ENDIAN_CHANGE

[ENDIAN_CHANGE

ASSERT:

DEF:

ENTRY_BUS_WIDTH

[ENTRY_BUS_WIDTH=32

bChangeBigEndian;DCD0xea000007

]

[ENTRY_BUS_WIDTH=16

andeqr14,r7,r0,lsl#20;DCD0x0007ea00

]

[ENTRY_BUS_WIDTH=8

streqr0,[r0,-r10,ror#1];DCD0x070000ea

]

|

bResetHandler

]

bHandlerUndef;//handlerforUndefinedmode

bHandlerSWI;//handlerforSWIinterrupt

bHandlerPabort;//handlerforPAbort

bHandlerDabort;//handlerforDAbort

b.;//reserved

bHandlerIRQ;//handlerforIRQinterrupt

bHandlerFIQ;//handlerforFIQinterrupt

;//@0x20

bEnterPWDN

ChangeBigEndian

;//@0x24

[ENTRY_BUS_WIDTH=32

DCD0xee110f10;0xee110f10=>mrcp15,0,r0,c1,c0,0

DCD0xe3800080;0xe3800080=>orrr0,r0,#0x80;//Big-endian

DCD0xee010f10;0xee010f10=>mcrp15,0,r0,c1,c0,0

]

[ENTRY_BUS_WIDTH=16

DCD0x0f10ee11

DCD0x0080e380

DCD0x0f10ee01

]

[ENTRY_BUS_WIDTH=8

DCD0x100f11ee

DCD0x800080e3

DCD0x100f01ee

]

DCD0xffffffff;//swinv0xffffffissimilarwithNOPandrunwellinbothendianmode.

DCD0xffffffff

DCD0xffffffff

DCD0xffffffff

DCD0xffffffff

bResetHandler

;//Functionforenteringpowerdownmode

;//1.SDRAMshouldbeinself-refreshmode.

;//2.AllinterruptshouldbemakskedforSDRAM/DRAMself-refresh.

;//3.LCDcontrollershouldbedisabledforSDRAM/DRAMself-refresh.

;//4.TheI-cachemayhavetobeturnedon.

;//5.Thelocationofthefollowingcodemayhavenottobechanged.

;//voidEnterPWDN（intCLKCON）;

EnterPWDN

movr2,r0;//r2=rCLKCON

tstr0,#0x8;//POWER_OFFmode?

bneENTER_POWER_OFF

ENTER_STOP

ldrr0,=REFRESH

ldrr3,[r0];//r3=rREFRESH

movr1,r3

orrr1,r1,#BIT_SELFREFRESH

strr1,[r0];//EnableSDRAMself-refresh

movr1,#16;//waituntilself-refreshisissued.maynotbeneeded.

0subsr1,r1,#1

bne%B0

ldrr0,=CLKCON;//enterSTOPmode.

strr2,[r0]

movr1,#32

0subsr1,r1,#1;//1）waituntiltheSTOPmodeisineffect.

bne%B0;//2）OrwaithereuntiltheCPU&Peripheralswillbeturned-off

;//EnteringPOWER_OFFmode,onlytheresetbywake-upisavailable.

ldrr0,=REFRESH;//exitfromSDRAMselfrefreshmode.

strr3,[r0]

MOV_PC_LR

ENTER_POWER_OFF

;//NOTE.

;//1）rGSTATUS3shouldhavethereturnaddressafterwake-upfromPOWER_OFFmode.

ldrr0,=REFRESH

ldrr1,[r0];//r1=rREFRESH

orrr1,r1,#BIT_SELFREFRESH

strr1,[r0];//EnableSDRAMself-refresh

movr1,#16;//Waituntilself-refreshisissued,whichmaynotbeneeded.

0subsr1,r1,#1

bne%B0

ldrr1,=MISCCR

ldrr0,[r1]

orrr0,r0,#（7<<17）;//MakesurethatSCLK0:

SCLK->0,SCLK1:

SCLK->0,SCKE=Lduringboot-up

strr0,[r1]

ldrr0,=CLKCON

strr2,[r0]

b.;//CPUwilldiehere.

WAKEUP_POWER_OFF

;//ReleaseSCLKnafterwake-upfromthePOWER_OFFmode.

ldrr1,=MISCCR

ldrr0,[r1]

bicr0,r0,#（7<<17）;//SCLK0:

0->SCLK,SCLK1:

0->SCLK,SCKE:

L->H

strr0,[r1]

;//Setmemorycontrolregisters

ldrr0,=SMRDATA

ldrr1,=BWSCON;//BWSCONAddress

addr2,r0,#52;//EndaddressofSMRDATA

0

ldrr3,[r0],#4

strr3,[r1],#4

cmpr2,r0

bne%B0

movr1,#256

0subsr1,r1,#1;//1）waituntiltheSelfRefreshisreleased.

bne%B0

ldrr1,=GSTATUS3;//GSTATUS3hasthestartaddressjustafterPOWER_OFFwake-up

ldrr0,[r1]

movpc,r0

LTORG

HandlerFIQHANDLERHandleFIQ

HandlerIRQHANDLERHandleIRQ

HandlerUndefHANDLERHandleUndef

HandlerSWIHANDLERHandleSWI

HandlerDabortHANDLERHandleDabort

HandlerPabortHANDLERHandlePabort

IsrIRQ

subsp,sp,#4;//reservedforPC

stmfdsp!

{r8-r9}

ldrr9,=INTOFFSET

ldrr9,[r9]

ldrr8,=HandleEINT0

addr8,r8,r9,lsl#2

ldrr8,[r8]

strr8,[sp,#8]

ldmfdsp!

{r8-r9,pc}

;//================================================================================================

;//ENTRY

;//=================================================================================================

ResetHandler

ldrr0,=WTCON;//watchdogdisable

ldrr1,=0x0

strr1,[r0]

ldrr0,=INTMSK

ldrr1,=0xffffffff;//allinterruptdisable

strr1,[r0]

ldrr0,=INTSUBMSK

ldrr1,=0x7ff;//allsubinterruptdisable,2002/04/10

strr1,[r0]

[{FALSE}

;//rGPFDAT=（rGPFDAT&~（0xf<<4））|（（~data&0xf）<<4）;

;//Led_Display

ldrr0,=GPFCON

ldrr1,=0x5500

strr1,[r0]

ldrr0,=GPFDAT

ldrr1,=0x10

strr1,[r0]

]

;//ToreducePLLlocktime,adjusttheLOCKTIMEregister.

ldrr0,=LOCKTIME

ldrr1,=0xffffff

strr1,[r0]

[PLL_ON_START

;//ConfigureMPLL

ldrr0,=MPLLCON

ldrr1,=（（M_MDIV<<12）+（M_PDIV<<4）+M_SDIV）;//Fin=12MHz,Fout=50MHz

strr1,[r0]

]

;//Checkifthebootiscausedbythewake-upfromPOWER_OFFmode.

ldrr1,=GSTATUS2

ldrr0,[r1]

tstr0,#0x2

;//Incaseofthewake-upfromPOWER_OFFmode,gotoPOWER_OFF_WAKEUPhandler.

bneWAKEUP_POWER_OFF

EXPORTStartPointAfterPowerOffWakeUp

StartPointAfterPowerOffWakeUp

;//Setmemorycontrolregisters

ldrr0,=SMRDATA

ldrr1,=BWSCON;//BWSCONAddress

addr2,r0,#52;//EndaddressofSMRDATA

0

ldrr3,[r0],#4

strr3,[r1],#4

cmpr2,r0

bne%B0

;//Initializestacks

blInitStacks

;//SetupIRQhandler

ldrr0,=HandleIRQ;//Thisroutineisneeded

ldrr1,=IsrIRQ;//ifthereisn't'subspc,lr,#4'at0x18,0x1c

strr1,[r0]

;//CopyandpasteRWdata/zeroinitializeddata

ldrr0,=|Image$$RO$$Limit|;//GetpointertoROMdata

ldrr1,=|Image$$RW$$Base|;//andRAMcopy

ldrr3,=|Image$$ZI$$Base|

;//Zeroinitbase=>topofinitialiseddata

cmpr0,r1;//Checkthattheyaredifferent

beq%F2

1

cmpr1,r3;//Copyinitdata

ldrccr2,[r0],#4;//-->LDRCCr2,[r0]+ADDr0,r0,#4

strccr2,[r1],#4;//-->STRCCr2,[r1]+ADDr1,r1,#4

bcc%B1

2

ldrr1,=|Image$$ZI$$Limit|;//Topofzeroinitsegment

movr2,#0

3

cmpr3,r1;Zeroinit

strccr2,[r3],#4

bcc%B3

[:

LNOT:

THUMBCODE

blMain;//Don'tusemain（）because......

b.

]

[THUMBCODE;//forstart-upcodeforThumbmode

orrlr,pc,#1

bxlr

CODE16

blMain;//Don'tusemain（）because......

b.

CODE32

]

;//functioninitializingstacks

InitStacks

;//Don'tuseDRAM,suchasstmfd,ldmfd......

;//SVCstackisinitializedbefore

;//Undertoolkitver2.5,'msrcpsr,r1'canbeusedinsteadof'msrcpsr_cxsf,r1'

mrsr0,cpsr

bicr0,r0,#MODEMASK

orrr1,r0,#UNDEFMODE|NOINT

msrcpsr_cxsf,r1;//UndefMode

ldrsp,=UndefStack

orrr1,r0,#ABORTMODE|NOINT

msrcpsr_cxsf,r1;//AbortMode

ldrsp,=AbortStack

orrr1,r0,#IRQMODE|NOINT

msr