2440init.s
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上传日期:2022-08-03
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文件大小:20k
源码类别:
Windows CE
开发平台:
Visual C++
- ;=========================================
- ; NAME: 2440INIT.S
- ; DESC: C start up codes
- ; Configure memory, ISR ,stacks
- ; Initialize C-variables
- ; HISTORY:
- ; 2002.02.25:kwtark: ver 0.0
- ; 2002.03.20:purnnamu: Add some functions for testing STOP,Sleep mode
- ; 2003.03.14:DonGo: Modified for 2440.
- ;=========================================
- GET option.inc
- GET memcfg.inc
- GET 2440addr.inc
- BIT_SELFREFRESH EQU (1<<22)
- ;Pre-defined constants
- USERMODE EQU 0x10
- FIQMODE EQU 0x11
- IRQMODE EQU 0x12
- SVCMODE EQU 0x13
- ABORTMODE EQU 0x17
- UNDEFMODE EQU 0x1b
- MODEMASK EQU 0x1f
- NOINT EQU 0xc0
- ;The location of stacks
- UserStack EQU (_STACK_BASEADDRESS-0x3800) ;0x33ff4800 ~
- SVCStack EQU (_STACK_BASEADDRESS-0x2800) ;0x33ff5800 ~
- UndefStack EQU (_STACK_BASEADDRESS-0x2400) ;0x33ff5c00 ~
- AbortStack EQU (_STACK_BASEADDRESS-0x2000) ;0x33ff6000 ~
- IRQStack EQU (_STACK_BASEADDRESS-0x1000) ;0x33ff7000 ~
- FIQStack EQU (_STACK_BASEADDRESS-0x0) ;0x33ff8000 ~
- ;Check if tasm.exe(armasm -16 ...@ADS 1.0) is used.
- GBLL THUMBCODE
- [ {CONFIG} = 16
- THUMBCODE SETL {TRUE}
- CODE32
- |
- THUMBCODE SETL {FALSE}
- ]
- MACRO
- MOV_PC_LR
- [ THUMBCODE
- bx lr
- |
- mov pc,lr
- ]
- MEND
- MACRO
- MOVEQ_PC_LR
- [ THUMBCODE
- bxeq lr
- |
- moveq pc,lr
- ]
- MEND
- MACRO
- $HandlerLabel HANDLER $HandleLabel
- $HandlerLabel
- sub sp,sp,#4 ;decrement sp(to store jump address)
- stmfd sp!,{r0} ;PUSH the work register to stack(lr does not push because it return to original address)
- ldr r0,=$HandleLabel;load the address of HandleXXX to r0
- ldr r0,[r0] ;load the contents(service routine start address) of HandleXXX
- str r0,[sp,#4] ;store the contents(ISR) of HandleXXX to stack
- ldmfd sp!,{r0,pc} ;POP the work register and pc(jump to ISR)
- MEND
- IMPORT |Image$$RO$$Base| ; Base of ROM code
- IMPORT |Image$$RO$$Limit| ; End of ROM code (=start of ROM data)
- IMPORT |Image$$RW$$Base| ; Base of RAM to initialise
- IMPORT |Image$$ZI$$Base| ; Base and limit of area
- IMPORT |Image$$ZI$$Limit| ; to zero initialise
- IMPORT MMU_SetAsyncBusMode
- IMPORT MMU_SetFastBusMode ;
- IMPORT Main ; The main entry of mon program
- IMPORT CopyProgramFromNand
- AREA Init,CODE,READONLY
- ENTRY
- EXPORT __ENTRY
- __ENTRY
- ResetEntry
- ;1)The code, which converts to Big-endian, should be in little endian code.
- ;2)The following little endian code will be compiled in Big-Endian mode.
- ; The code byte order should be changed as the memory bus width.
- ;3)The pseudo instruction,DCD can not be used here because the linker generates error.
- ASSERT :DEF:ENDIAN_CHANGE
- [ ENDIAN_CHANGE
- ASSERT :DEF:ENTRY_BUS_WIDTH
- [ ENTRY_BUS_WIDTH=32
- b ChangeBigEndian ;DCD 0xea000007
- ]
- [ ENTRY_BUS_WIDTH=16
- andeq r14,r7,r0,lsl #20 ;DCD 0x0007ea00
- ]
- [ ENTRY_BUS_WIDTH=8
- streq r0,[r0,-r10,ror #1] ;DCD 0x070000ea
- ]
- |
- b ResetHandler
- ]
- b HandlerUndef ;handler for Undefined mode
- b HandlerSWI ;handler for SWI interrupt
- b HandlerPabort ;handler for PAbort
- b HandlerDabort ;handler for DAbort
- b . ;reserved
- b HandlerIRQ ;handler for IRQ interrupt
- b HandlerFIQ ;handler for FIQ interrupt
- ;@0x20
- b EnterPWDN ; Must be @0x20.
- ChangeBigEndian
- ;@0x24
- [ ENTRY_BUS_WIDTH=32
- DCD 0xee110f10 ;0xee110f10 => mrc p15,0,r0,c1,c0,0
- DCD 0xe3800080 ;0xe3800080 => orr r0,r0,#0x80; //Big-endian
- DCD 0xee010f10 ;0xee010f10 => mcr p15,0,r0,c1,c0,0
- ]
- [ ENTRY_BUS_WIDTH=16
- DCD 0x0f10ee11
- DCD 0x0080e380
- DCD 0x0f10ee01
- ]
- [ ENTRY_BUS_WIDTH=8
- DCD 0x100f11ee
- DCD 0x800080e3
- DCD 0x100f01ee
- ]
- DCD 0xffffffff ;swinv 0xffffff is similar with NOP and run well in both endian mode.
- DCD 0xffffffff
- DCD 0xffffffff
- DCD 0xffffffff
- DCD 0xffffffff
- b ResetHandler
- HandlerFIQ HANDLER HandleFIQ
- HandlerIRQ HANDLER HandleIRQ
- HandlerUndef HANDLER HandleUndef
- HandlerSWI HANDLER HandleSWI
- HandlerDabort HANDLER HandleDabort
- HandlerPabort HANDLER HandlePabort
- IsrIRQ
- sub sp,sp,#4 ;reserved for PC
- stmfd sp!,{r8-r9}
- ldr r9,=INTOFFSET
- ldr r9,[r9]
- ldr r8,=HandleEINT0
- add r8,r8,r9,lsl #2
- ldr r8,[r8]
- str r8,[sp,#8]
- ldmfd sp!,{r8-r9,pc}
- LTORG
- ;=======
- ; ENTRY
- ;=======
- ResetHandler
- ldr r0,=WTCON ;watch dog disable
- ldr r1,=0x0
- str r1,[r0]
- ldr r0,=INTMSK
- ldr r1,=0xffffffff ;all interrupt disable
- str r1,[r0]
- ldr r0,=INTSUBMSK
- ldr r1,=0x7fff ;all sub interrupt disable
- str r1,[r0]
- [ {TRUE}
- ;rGPFDAT = (rGPFDAT & ~(0xf<<4)) | ((~data & 0xf)<<4);
- ; Led_Display
- ldr r0,=GPBCON
- ldr r1,=0x00555555
- str r1,[r0]
- ldr r0,=GPBDAT
- ldr r1,=0x07fe
- str r1,[r0]
- ]
- ;To reduce PLL lock time, adjust the LOCKTIME register.
- ldr r0,=LOCKTIME
- ldr r1,=0xffffff
- str r1,[r0]
- [ PLL_ON_START
- ; Added for confirm clock divide. for 2440.
- ; Setting value Fclk:Hclk:Pclk
- ldr r0,=CLKDIVN
- ldr r1,=CLKDIV_VAL ; 0=1:1:1, 1=1:1:2, 2=1:2:2, 3=1:2:4, 4=1:4:4, 5=1:4:8, 6=1:3:3, 7=1:3:6.
- str r1,[r0]
- ; MMU_SetAsyncBusMode and MMU_SetFastBusMode over 4K, so do not call here
- ; call it after copy
- ; [ CLKDIV_VAL>1 ; means Fclk:Hclk is not 1:1.
- ; bl MMU_SetAsyncBusMode
- ; |
- ; bl MMU_SetFastBusMode ; default value.
- ; ]
- ;program has not been copied, so use these directly
- [ CLKDIV_VAL>1 ; means Fclk:Hclk is not 1:1.
- mrc p15,0,r0,c1,c0,0
- orr r0,r0,#0xc0000000;R1_nF:OR:R1_iA
- mcr p15,0,r0,c1,c0,0
- |
- mrc p15,0,r0,c1,c0,0
- bic r0,r0,#0xc0000000;R1_iA:OR:R1_nF
- mcr p15,0,r0,c1,c0,0
- ]
- ;Configure UPLL
- ldr r0,=UPLLCON
- ldr r1,=((U_MDIV<<12)+(U_PDIV<<4)+U_SDIV)
- str r1,[r0]
- nop ; Caution: After UPLL setting, at least 7-clocks delay must be inserted for setting hardware be completed.
- nop
- nop
- nop
- nop
- nop
- nop
- ;Configure MPLL
- ldr r0,=MPLLCON
- ldr r1,=((M_MDIV<<12)+(M_PDIV<<4)+M_SDIV) ;Fin=16.9344MHz
- str r1,[r0]
- ]
- ;Check if the boot is caused by the wake-up from SLEEP mode.
- ldr r1,=GSTATUS2
- ldr r0,[r1]
- tst r0,#0x2
- ;In case of the wake-up from SLEEP mode, go to SLEEP_WAKEUP handler.
- bne WAKEUP_SLEEP
- EXPORT StartPointAfterSleepWakeUp
- StartPointAfterSleepWakeUp
- ;Set memory control registers
- ;ldr r0,=SMRDATA
- adrl r0, SMRDATA ;be careful!
- ldr r1,=BWSCON ;BWSCON Address
- add r2, r0, #52 ;End address of SMRDATA
- 0
- ldr r3, [r0], #4
- str r3, [r1], #4
- cmp r2, r0
- bne %B0
- ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
- ;;;;;;;;;;;;; When EINT0 is pressed, Clear SDRAM
- ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
- ; check if EIN0 button is pressed
- ldr r0,=GPFCON
- ldr r1,=0x0
- str r1,[r0]
- ldr r0,=GPFUP
- ldr r1,=0xff
- str r1,[r0]
- ldr r1,=GPFDAT
- ldr r0,[r1]
- bic r0,r0,#(0x1e<<1) ; bit clear
- tst r0,#0x1
- bne %F1
- ; Clear SDRAM Start
- ldr r0,=GPFCON
- ldr r1,=0x55aa
- str r1,[r0]
- ; ldr r0,=GPFUP
- ; ldr r1,=0xff
- ; str r1,[r0]
- ldr r0,=GPFDAT
- ldr r1,=0x0
- str r1,[r0] ;LED=****
- mov r1,#0
- mov r2,#0
- mov r3,#0
- mov r4,#0
- mov r5,#0
- mov r6,#0
- mov r7,#0
- mov r8,#0
- ldr r9,=0x4000000 ;64MB
- ldr r0,=0x30000000
- 0
- stmia r0!,{r1-r8}
- subs r9,r9,#32
- bne %B0
- ;Clear SDRAM End
- 1
- ;Initialize stacks
- bl InitStacks
- ;===========================================================
- ldr r0, =BWSCON
- ldr r0, [r0]
- ands r0, r0, #6 ;OM[1:0] != 0, NOR FLash boot
- bne copy_proc_beg ;do not read nand flash
- adr r0, ResetEntry ;OM[1:0] == 0, NAND FLash boot
- cmp r0, #0 ;if use Multi-ice,
- bne copy_proc_beg ;do not read nand flash for boot
- ;nop
- ;===========================================================
- nand_boot_beg
- [ {TRUE}
- bl CopyProgramFromNand
- |
- mov r5, #NFCONF
- ;set timing value
- ldr r0, =(7<<12)|(7<<8)|(7<<4)
- str r0, [r5]
- ;enable control
- ldr r0, =(0<<13)|(0<<12)|(0<<10)|(0<<9)|(0<<8)|(1<<6)|(1<<5)|(1<<4)|(1<<1)|(1<<0)
- str r0, [r5, #4]
- bl ReadNandID
- mov r6, #0
- ldr r0, =0xec73
- cmp r5, r0
- beq %F1
- ldr r0, =0xec75
- cmp r5, r0
- beq %F1
- mov r6, #1
- 1
- bl ReadNandStatus
- mov r8, #0
- ldr r9, =ResetEntry
- 2
- ands r0, r8, #0x1f
- bne %F3
- mov r0, r8
- bl CheckBadBlk
- cmp r0, #0
- addne r8, r8, #32
- bne %F4
- 3
- mov r0, r8
- mov r1, r9
- bl ReadNandPage
- add r9, r9, #512
- add r8, r8, #1
- 4
- cmp r8, #5120
- bcc %B2
- mov r5, #NFCONF ;DsNandFlash
- ldr r0, [r5, #4]
- bic r0, r0, #1
- str r0, [r5, #4]
- ]
- ldr pc, =copy_proc_beg
- ;===========================================================
- copy_proc_beg
- adr r0, ResetEntry
- ldr r2, BaseOfROM
- cmp r0, r2
- ldreq r0, TopOfROM
- beq InitRam
- ldr r3, TopOfROM
- 0
- ldmia r0!, {r4-r7}
- stmia r2!, {r4-r7}
- cmp r2, r3
- bcc %B0
- sub r2, r2, r3
- sub r0, r0, r2
- InitRam
- ldr r2, BaseOfBSS
- ldr r3, BaseOfZero
- 0
- cmp r2, r3
- ldrcc r1, [r0], #4
- strcc r1, [r2], #4
- bcc %B0
- mov r0, #0
- ldr r3, EndOfBSS
- 1
- cmp r2, r3
- strcc r0, [r2], #4
- bcc %B1
- ldr pc, =%F2 ;goto compiler address
- 2
- ; [ CLKDIV_VAL>1 ; means Fclk:Hclk is not 1:1.
- ; bl MMU_SetAsyncBusMode
- ; |
- ; bl MMU_SetFastBusMode ; default value.
- ; ]
- ;bl Led_Test
- ;===========================================================
- ; Setup IRQ handler
- ldr r0,=HandleIRQ ;This routine is needed
- ldr r1,=IsrIRQ ;if there is not 'subs pc,lr,#4' at 0x18, 0x1c
- str r1,[r0]
- ; ;Copy and paste RW data/zero initialized data
- ; ldr r0, =|Image$$RO$$Limit| ; Get pointer to ROM data
- ; ldr r1, =|Image$$RW$$Base| ; and RAM copy
- ; ldr r3, =|Image$$ZI$$Base|
- ;
- ; ;Zero init base => top of initialised data
- ; cmp r0, r1 ; Check that they are different
- ; beq %F2
- ;1
- ; cmp r1, r3 ; Copy init data
- ; ldrcc r2, [r0], #4 ;--> LDRCC r2, [r0] + ADD r0, r0, #4
- ; strcc r2, [r1], #4 ;--> STRCC r2, [r1] + ADD r1, r1, #4
- ; bcc %B1
- ;2
- ; ldr r1, =|Image$$ZI$$Limit| ; Top of zero init segment
- ; mov r2, #0
- ;3
- ; cmp r3, r1 ; Zero init
- ; strcc r2, [r3], #4
- ; bcc %B3
- [ :LNOT:THUMBCODE
- bl Main ;Do not use main() because ......
- ;ldr pc, =Main ;
- b .
- ]
- [ THUMBCODE ;for start-up code for Thumb mode
- orr lr,pc,#1
- bx lr
- CODE16
- bl Main ;Do not use main() because ......
- b .
- CODE32
- ]
- ;function initializing stacks
- InitStacks
- ;Do not use DRAM,such as stmfd,ldmfd......
- ;SVCstack is initialized before
- ;Under toolkit ver 2.5, 'msr cpsr,r1' can be used instead of 'msr cpsr_cxsf,r1'
- mrs r0,cpsr
- bic r0,r0,#MODEMASK
- orr r1,r0,#UNDEFMODE|NOINT
- msr cpsr_cxsf,r1 ;UndefMode
- ldr sp,=UndefStack ; UndefStack=0x33FF_5C00
- orr r1,r0,#ABORTMODE|NOINT
- msr cpsr_cxsf,r1 ;AbortMode
- ldr sp,=AbortStack ; AbortStack=0x33FF_6000
- orr r1,r0,#IRQMODE|NOINT
- msr cpsr_cxsf,r1 ;IRQMode
- ldr sp,=IRQStack ; IRQStack=0x33FF_7000
- orr r1,r0,#FIQMODE|NOINT
- msr cpsr_cxsf,r1 ;FIQMode
- ldr sp,=FIQStack ; FIQStack=0x33FF_8000
- bic r0,r0,#MODEMASK|NOINT
- orr r1,r0,#SVCMODE
- msr cpsr_cxsf,r1 ;SVCMode
- ldr sp,=SVCStack ; SVCStack=0x33FF_5800
- ;USER mode has not be initialized.
- mov pc,lr
- ;The LR register will not be valid if the current mode is not SVC mode.
- ;===========================================================
- [ {TRUE}
- |
- ReadNandID
- mov r7,#NFCONF
- ldr r0,[r7,#4] ;NFChipEn();
- bic r0,r0,#2
- str r0,[r7,#4]
- mov r0,#0x90 ;WrNFCmd(RdIDCMD);
- strb r0,[r7,#8]
- mov r4,#0 ;WrNFAddr(0);
- strb r4,[r7,#0xc]
- 1 ;while(NFIsBusy());
- ldr r0,[r7,#0x20]
- tst r0,#1
- beq %B1
- ldrb r0,[r7,#0x10] ;id = RdNFDat()<<8;
- mov r0,r0,lsl #8
- ldrb r1,[r7,#0x10] ;id |= RdNFDat();
- orr r5,r1,r0
- ldr r0,[r7,#4] ;NFChipDs();
- orr r0,r0,#2
- str r0,[r7,#4]
- mov pc,lr
- ReadNandStatus
- mov r7,#NFCONF
- ldr r0,[r7,#4] ;NFChipEn();
- bic r0,r0,#2
- str r0,[r7,#4]
- mov r0,#0x70 ;WrNFCmd(QUERYCMD);
- strb r0,[r7,#8]
- ldrb r1,[r7,#0x10] ;r1 = RdNFDat();
- ldr r0,[r7,#4] ;NFChipDs();
- orr r0,r0,#2
- str r0,[r7,#4]
- mov pc,lr
- WaitNandBusy
- mov r0,#0x70 ;WrNFCmd(QUERYCMD);
- mov r1,#NFCONF
- strb r0,[r1,#8]
- 1 ;while(!(RdNFDat()&0x40));
- ldrb r0,[r1,#0x10]
- tst r0,#0x40
- beq %B1
- mov r0,#0 ;WrNFCmd(READCMD0);
- strb r0,[r1,#8]
- mov pc,lr
- CheckBadBlk
- mov r7, lr
- mov r5, #NFCONF
- bic r0,r0,#0x1f ;addr &= ~0x1f;
- ldr r1,[r5,#4] ;NFChipEn()
- bic r1,r1,#2
- str r1,[r5,#4]
- mov r1,#0x50 ;WrNFCmd(READCMD2)
- strb r1,[r5,#8]
- mov r1, #5;6 ;6->5
- strb r1,[r5,#0xc] ;WrNFAddr(5);(6) 6->5
- strb r0,[r5,#0xc] ;WrNFAddr(addr)
- mov r1,r0,lsr #8 ;WrNFAddr(addr>>8)
- strb r1,[r5,#0xc]
- cmp r6,#0 ;if(NandAddr)
- movne r0,r0,lsr #16 ;WrNFAddr(addr>>16)
- strneb r0,[r5,#0xc]
- ; bl WaitNandBusy ;WaitNFBusy()
- ;do not use WaitNandBusy, after WaitNandBusy will read part A!
- mov r0, #100
- 1
- subs r0, r0, #1
- bne %B1
- 2
- ldr r0, [r5, #0x20]
- tst r0, #1
- beq %B2
- ldrb r0, [r5,#0x10] ;RdNFDat()
- sub r0, r0, #0xff
- mov r1,#0 ;WrNFCmd(READCMD0)
- strb r1,[r5,#8]
- ldr r1,[r5,#4] ;NFChipDs()
- orr r1,r1,#2
- str r1,[r5,#4]
- mov pc, r7
- ReadNandPage
- mov r7,lr
- mov r4,r1
- mov r5,#NFCONF
- ldr r1,[r5,#4] ;NFChipEn()
- bic r1,r1,#2
- str r1,[r5,#4]
- mov r1,#0 ;WrNFCmd(READCMD0)
- strb r1,[r5,#8]
- strb r1,[r5,#0xc] ;WrNFAddr(0)
- strb r0,[r5,#0xc] ;WrNFAddr(addr)
- mov r1,r0,lsr #8 ;WrNFAddr(addr>>8)
- strb r1,[r5,#0xc]
- cmp r6,#0 ;if(NandAddr)
- movne r0,r0,lsr #16 ;WrNFAddr(addr>>16)
- strneb r0,[r5,#0xc]
- ldr r0,[r5,#4] ;InitEcc()
- orr r0,r0,#0x10
- str r0,[r5,#4]
- bl WaitNandBusy ;WaitNFBusy()
- mov r0,#0 ;for(i=0; i<512; i++)
- 1
- ldrb r1,[r5,#0x10] ;buf[i] = RdNFDat()
- strb r1,[r4,r0]
- add r0,r0,#1
- bic r0,r0,#0x10000
- cmp r0,#0x200
- bcc %B1
- ldr r0,[r5,#4] ;NFChipDs()
- orr r0,r0,#2
- str r0,[r5,#4]
- mov pc,r7
- ]
- ;===========================================================
- LTORG
- ;GCS0->SST39VF1601
- ;GCS1->16c550
- ;GCS2->IDE
- ;GCS3->CS8900
- ;GCS4->DM9000
- ;GCS5->CF Card
- ;GCS6->SDRAM
- ;GCS7->unused
- SMRDATA DATA
- ; Memory configuration should be optimized for best performance
- ; The following parameter is not optimized.
- ; Memory access cycle parameter strategy
- ; 1) The memory settings is safe parameters even at HCLK=75Mhz.
- ; 2) SDRAM refresh period is for HCLK<=75Mhz.
- DCD (0+(B1_BWSCON<<4)+(B2_BWSCON<<8)+(B3_BWSCON<<12)+(B4_BWSCON<<16)+(B5_BWSCON<<20)+(B6_BWSCON<<24)+(B7_BWSCON<<28))
- DCD ((B0_Tacs<<13)+(B0_Tcos<<11)+(B0_Tacc<<8)+(B0_Tcoh<<6)+(B0_Tah<<4)+(B0_Tacp<<2)+(B0_PMC)) ;GCS0
- DCD ((B1_Tacs<<13)+(B1_Tcos<<11)+(B1_Tacc<<8)+(B1_Tcoh<<6)+(B1_Tah<<4)+(B1_Tacp<<2)+(B1_PMC)) ;GCS1
- DCD ((B2_Tacs<<13)+(B2_Tcos<<11)+(B2_Tacc<<8)+(B2_Tcoh<<6)+(B2_Tah<<4)+(B2_Tacp<<2)+(B2_PMC)) ;GCS2
- DCD ((B3_Tacs<<13)+(B3_Tcos<<11)+(B3_Tacc<<8)+(B3_Tcoh<<6)+(B3_Tah<<4)+(B3_Tacp<<2)+(B3_PMC)) ;GCS3
- DCD ((B4_Tacs<<13)+(B4_Tcos<<11)+(B4_Tacc<<8)+(B4_Tcoh<<6)+(B4_Tah<<4)+(B4_Tacp<<2)+(B4_PMC)) ;GCS4
- DCD ((B5_Tacs<<13)+(B5_Tcos<<11)+(B5_Tacc<<8)+(B5_Tcoh<<6)+(B5_Tah<<4)+(B5_Tacp<<2)+(B5_PMC)) ;GCS5
- DCD ((B6_MT<<15)+(B6_Trcd<<2)+(B6_SCAN)) ;GCS6
- DCD ((B7_MT<<15)+(B7_Trcd<<2)+(B7_SCAN)) ;GCS7
- DCD ((REFEN<<23)+(TREFMD<<22)+(Trp<<20)+(Tsrc<<18)+(Tchr<<16)+REFCNT)
- DCD 0x32 ;SCLK power saving mode, BANKSIZE 128M/128M
- DCD 0x30 ;MRSR6 CL=3clk
- DCD 0x30 ;MRSR7 CL=3clk
- BaseOfROM DCD |Image$$RO$$Base|
- TopOfROM DCD |Image$$RO$$Limit|
- BaseOfBSS DCD |Image$$RW$$Base|
- BaseOfZero DCD |Image$$ZI$$Base|
- EndOfBSS DCD |Image$$ZI$$Limit|
- ALIGN
- ;Function for entering power down mode
- ; 1. SDRAM should be in self-refresh mode.
- ; 2. All interrupt should be maksked for SDRAM/DRAM self-refresh.
- ; 3. LCD controller should be disabled for SDRAM/DRAM self-refresh.
- ; 4. The I-cache may have to be turned on.
- ; 5. The location of the following code may have not to be changed.
- ;void EnterPWDN(int CLKCON);
- EnterPWDN
- mov r2,r0 ;r2=rCLKCON
- tst r0,#0x8 ;SLEEP mode?
- bne ENTER_SLEEP
- ENTER_STOP
- ldr r0,=REFRESH
- ldr r3,[r0] ;r3=rREFRESH
- mov r1, r3
- orr r1, r1, #BIT_SELFREFRESH
- str r1, [r0] ;Enable SDRAM self-refresh
- mov r1,#16 ;wait until self-refresh is issued. may not be needed.
- 0 subs r1,r1,#1
- bne %B0
- ldr r0,=CLKCON ;enter STOP mode.
- str r2,[r0]
- mov r1,#32
- 0 subs r1,r1,#1 ;1) wait until the STOP mode is in effect.
- bne %B0 ;2) Or wait here until the CPU&Peripherals will be turned-off
- ; Entering SLEEP mode, only the reset by wake-up is available.
- ldr r0,=REFRESH ;exit from SDRAM self refresh mode.
- str r3,[r0]
- MOV_PC_LR
- ENTER_SLEEP
- ;NOTE.
- ;1) rGSTATUS3 should have the return address after wake-up from SLEEP mode.
- ldr r0,=REFRESH
- ldr r1,[r0] ;r1=rREFRESH
- orr r1, r1, #BIT_SELFREFRESH
- str r1, [r0] ;Enable SDRAM self-refresh
- mov r1,#16 ;Wait until self-refresh is issued,which may not be needed.
- 0 subs r1,r1,#1
- bne %B0
- ldr r1,=MISCCR
- ldr r0,[r1]
- orr r0,r0,#(7<<17) ;Set SCLK0=0, SCLK1=0, SCKE=0.
- str r0,[r1]
- ldr r0,=CLKCON ; Enter sleep mode
- str r2,[r0]
- b . ;CPU will die here.
- WAKEUP_SLEEP
- ;Release SCLKn after wake-up from the SLEEP mode.
- ldr r1,=MISCCR
- ldr r0,[r1]
- bic r0,r0,#(7<<17) ;SCLK0:0->SCLK, SCLK1:0->SCLK, SCKE:0->=SCKE.
- str r0,[r1]
- ;Set memory control registers
- ldr r0,=SMRDATA ;be careful!
- ldr r1,=BWSCON ;BWSCON Address
- add r2, r0, #52 ;End address of SMRDATA
- 0
- ldr r3, [r0], #4
- str r3, [r1], #4
- cmp r2, r0
- bne %B0
- mov r1,#256
- 0 subs r1,r1,#1 ;1) wait until the SelfRefresh is released.
- bne %B0
- ldr r1,=GSTATUS3 ;GSTATUS3 has the start address just after SLEEP wake-up
- ldr r0,[r1]
- mov pc,r0
- ;=====================================================================
- ; Clock division test
- ; Assemble code, because VSYNC time is very short
- ;=====================================================================
- EXPORT CLKDIV124
- EXPORT CLKDIV144
- CLKDIV124
- ldr r0, = CLKDIVN
- ldr r1, = 0x3 ; 0x3 = 1:2:4
- str r1, [r0]
- ; wait until clock is stable
- nop
- nop
- nop
- nop
- nop
- ldr r0, = REFRESH
- ldr r1, [r0]
- bic r1, r1, #0xff
- bic r1, r1, #(0x7<<8)
- orr r1, r1, #0x470 ; REFCNT135
- str r1, [r0]
- nop
- nop
- nop
- nop
- nop
- mov pc, lr
- CLKDIV144
- ldr r0, = CLKDIVN
- ldr r1, = 0x4 ; 0x4 = 1:4:4
- str r1, [r0]
- ; wait until clock is stable
- nop
- nop
- nop
- nop
- nop
- ldr r0, = REFRESH
- ldr r1, [r0]
- bic r1, r1, #0xff
- bic r1, r1, #(0x7<<8)
- orr r1, r1, #0x630 ; REFCNT675 - 1520
- str r1, [r0]
- nop
- nop
- nop
- nop
- nop
- mov pc, lr
- ALIGN
- AREA RamData, DATA, READWRITE
- ^ _ISR_STARTADDRESS ; _ISR_STARTADDRESS=0x33FF_FF00
- HandleReset # 4
- HandleUndef # 4
- HandleSWI # 4
- HandlePabort # 4
- HandleDabort # 4
- HandleReserved # 4
- HandleIRQ # 4
- HandleFIQ # 4
- ;Do not use the label 'IntVectorTable',
- ;The value of IntVectorTable is different with the address you think it may be.
- ;IntVectorTable
- ;@0x33FF_FF20
- HandleEINT0 # 4
- HandleEINT1 # 4
- HandleEINT2 # 4
- HandleEINT3 # 4
- HandleEINT4_7 # 4
- HandleEINT8_23 # 4
- HandleCAM # 4 ; Added for 2440.
- HandleBATFLT # 4
- HandleTICK # 4
- HandleWDT # 4
- HandleTIMER0 # 4
- HandleTIMER1 # 4
- HandleTIMER2 # 4
- HandleTIMER3 # 4
- HandleTIMER4 # 4
- HandleUART2 # 4
- ;@0x33FF_FF60
- HandleLCD # 4
- HandleDMA0 # 4
- HandleDMA1 # 4
- HandleDMA2 # 4
- HandleDMA3 # 4
- HandleMMC # 4
- HandleSPI0 # 4
- HandleUART1 # 4
- HandleNFCON # 4 ; Added for 2440.
- HandleUSBD # 4
- HandleUSBH # 4
- HandleIIC # 4
- HandleUART0 # 4
- HandleSPI1 # 4
- HandleRTC # 4
- HandleADC # 4
- ;@0x33FF_FFA0
- END