📄 44binit.s
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mrs r0,cpsr
bic r0,r0,#MODEMASK
orr r1,r0,#UNDEFMODE|NOINT
msr cpsr_cxsf,r1 ;UndefMode
ldr sp,=UndefStack
orr r1,r0,#ABORTMODE|NOINT
msr cpsr_cxsf,r1 ;AbortMode
ldr sp,=AbortStack
orr r1,r0,#IRQMODE|NOINT
msr cpsr_cxsf,r1 ;IRQMode
ldr sp,=IRQStack
orr r1,r0,#FIQMODE|NOINT
msr cpsr_cxsf,r1 ;FIQMode
ldr sp,=FIQStack
bic r0,r0,#MODEMASK|NOINT
orr r1,r0,#SVCMODE
msr cpsr_cxsf,r1 ;SVCMode
ldr sp,=SVCStack
;USER mode is not initialized.
mov pc,lr ;The LR register may be not valid for the mode changes.
;****************************************************
;* The function for entering power down mode *
;****************************************************
;void EnterPWDN(int CLKCON);
EnterPWDN
mov r2,r0 ;r0=CLKCON
ldr r0,=REFRESH
ldr r3,[r0]
mov r1, r3
orr r1, r1, #0x400000 ;self-refresh enable
str r1, [r0]
nop ;Wait until self-refresh is issued. May not be needed.
nop ;If the other bus master holds the bus, ...
nop ; mov r0, r0
nop
nop
nop
nop
;enter POWERDN mode
ldr r0,=CLKCON
str r2,[r0]
;wait until enter SL_IDLE,STOP mode and until wake-up
ldr r0,=0x10
0 subs r0,r0,#1
bne %B0
;exit from DRAM/SDRAM self refresh mode.
ldr r0,=REFRESH
str r3,[r0]
mov pc,lr
LTORG
SMRDATA DATA
;*****************************************************************
;* Memory configuration has to be optimized for best performance *
;* The following parameter is not optimized. *
;*****************************************************************
;*** memory access cycle parameter strategy ***
; 1) Even FP-DRAM, EDO setting has more late fetch point by half-clock
; 2) The memory settings,here, are made the safe parameters even at 66Mhz.
; 3) FP-DRAM Parameters:tRCD=3 for tRAC, tcas=2 for pad delay, tcp=2 for bus load.
; 4) DRAM refresh rate is for 40Mhz.
;bank0 16bit BOOT ROM 32M
;bank1 8bit USB(PDIUSBD12)
;bank2 16bit IDE
;bank3 16bit net(RTL8019AS)
;bank4 no
;bank5 no
;bank6 16bit SDRAM 8M
;bank7 no
; BUSWIDTH=16
DCD 0x11111110 ;Bank0=OM[1:0], Bank1~Bank7=16bit
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)+(Trc<<18)+(Tchr<<16)+REFCNT) ;REFRESH RFEN=1, TREFMD=0, trp=3clk, trc=5clk, tchr=3clk,count=1019
DCD 0x10 ;SCLK power down mode, BANKSIZE 32M/32M
DCD 0x20 ;MRSR6 CL=2clk
DCD 0x20 ;MRSR7
ALIGN
AREA RamData, DATA, READWRITE
^ (_ISR_STARTADDRESS-0x500)
UserStack # 256 ;c1(c7)ffa00
SVCStack # 256 ;c1(c7)ffb00
UndefStack # 256 ;c1(c7)ffc00
AbortStack # 256 ;c1(c7)ffd00
IRQStack # 256 ;c1(c7)ffe00
FIQStack # 0 ;c1(c7)fff00
^ _ISR_STARTADDRESS
HandleReset # 4
HandleUndef # 4
HandleSWI # 4
HandlePabort # 4
HandleDabort # 4
HandleReserved # 4
HandleIRQ # 4
HandleFIQ # 4
;Do not use the label 'IntVectorTable',
;because armasm.exe can not recognize this label correctly.
;the value is different with an address you think it may be.
;IntVectorTable
HandleADC # 4
HandleRTC # 4
HandleUTXD1 # 4
HandleUTXD0 # 4
HandleSIO # 4
HandleIIC # 4
HandleURXD1 # 4
HandleURXD0 # 4
HandleTIMER5 # 4
HandleTIMER4 # 4
HandleTIMER3 # 4
HandleTIMER2 # 4
HandleTIMER1 # 4
HandleTIMER0 # 4
HandleUERR01 # 4
HandleWDT # 4
HandleBDMA1 # 4
HandleBDMA0 # 4
HandleZDMA1 # 4
HandleZDMA0 # 4
HandleTICK # 4
HandleEINT4567 # 4
HandleEINT3 # 4
HandleEINT2 # 4
HandleEINT1 # 4
HandleEINT0 # 4 ;0xc7fff84
END
;-------------------------------------------------------------------
;APP RAM=0xc000000-0xc7effff
;44BMON RAM=0xc7f0000-0xc7fffff
;STACK =0xc7ffa00
;-------------------------------------------------------------------
;_RAM_STARTADDRESS EQU 0xc000000
;_ISR_STARTADDRESS EQU 0xc7fff00 ;GCS6:64M SDRAM
;
;-------------------------------------------------------------------
;起始地址--------中断类型-------------------------------------------
;-------------------------------------------------------------------
;ARM七种模式的堆栈空间地址，每种模式的堆栈有256个字节
;0xc7ffa00------>UserStack
;0xc7ffaff
;0xc7ffb00------>SVCStack
;0xc7ffbff
;0xc7ffc00------>UndefStack
;0xc7ffcff
;0xc7ffd00------>AbortStack
;0xc7ffdff
;0xc7ffe00------>IRQStack
;0xc7ffeff
;0xc7fff00------>FIQStack(占据0个字节，即没有定义快速中断的堆栈)
;中断服务寄存器起始地址：0xc7fff00
;每4个字节组成1个32位的字，用于存放中断服务程序的地址
;0xc7fff00------>HandleReset
;0xc7fff01
;0xc7fff02
;0xc7fff03
;0xc7fff04------>HandleUndef
;0xc7fff05
;0xc7fff06
;0xc7fff07
;0xc7fff08------>HandleSWI
;0xc7fff09
;0xc7fff0a
;0xc7fff0b
;0xc7fff0c------>HandlePabort
;0xc7fff0d
;0xc7fff0e
;0xc7fff0f
;0xc7fff10------>HandleDabort
;0xc7fff11
;0xc7fff12
;0xc7fff13
;0xc7fff14------>HandleReserved
;0xc7fff15
;0xc7fff16
;0xc7fff17
;0xc7fff18------>HandleIRQ
;0xc7fff19
;0xc7fff1a
;0xc7fff1b
;0xc7fff1c------>HandleFIQ
;0xc7fff1d
;0xc7fff1e
;0xc7fff1f
;0xc7fff20------>HandleADC
;0xc7fff21
;0xc7fff22
;0xc7fff23
;0xc7fff24------>HandleRTC
;0xc7fff25
;0xc7fff26
;0xc7fff27
;0xc7fff28------>HandleUTXD1
;0xc7fff29
;0xc7fff2a
;0xc7fff2b
;0xc7fff2c------>HandleUTXD0
;0xc7fff2d
;0xc7fff2e
;0xc7fff2f
;0xc7fff30------>HandleSIO
;0xc7fff31
;0xc7fff32
;0xc7fff33
;0xc7fff34------>HandleIIC
;0xc7fff35
;0xc7fff36
;0xc7fff37
;0xc7fff38------>HandleURXD1
;0xc7fff39
;0xc7fff3a
;0xc7fff3b
;0xc7fff3c------>HandleURXD0
;0xc7fff3d
;0xc7fff3e
;0xc7fff3f
;0xc7fff40------>HandleTIMER5
;0xc7fff41
;0xc7fff42
;0xc7fff43
;0xc7fff44------>HandleTIMER4
;0xc7fff45
;0xc7fff46
;0xc7fff47
;0xc7fff48------>HandleTIMER3
;0xc7fff49
;0xc7fff4a
;0xc7fff4b
;0xc7fff4c------>HandleTIMER2
;0xc7fff4d
;0xc7fff4e
;0xc7fff4f
;0xc7fff50------>HandleTIMER1
;0xc7fff51
;0xc7fff52
;0xc7fff53
;0xc7fff54------>HandleTIMER0
;0xc7fff55
;0xc7fff56
;0xc7fff57
;0xc7fff58------>HandleUERR01
;0xc7fff59
;0xc7fff5a
;0xc7fff5b
;0xc7fff5c------>HandleWDT
;0xc7fff5d
;0xc7fff5e
;0xc7fff5f
;0xc7fff60------>HandleBDMA1
;0xc7fff61
;0xc7fff62
;0xc7fff63
;0xc7fff64------>HandleBDMA0
;0xc7fff65
;0xc7fff66
;0xc7fff67
;0xc7fff68------>HandleZDMA1
;0xc7fff69
;0xc7fff6a
;0xc7fff6b
;0xc7fff6c------>HandleZDMA0
;0xc7fff6d
;0xc7fff6e
;0xc7fff6f
;0xc7fff70------>HandleTICK
;0xc7fff71
;0xc7fff72
;0xc7fff73
;0xc7fff74------>HandleEINT4567
;0xc7fff75
;0xc7fff76
;0xc7fff77
;0xc7fff78------>HandleEINT3
;0xc7fff79
;0xc7fff7a
;0xc7fff7b
;0xc7fff7c------>HandleEINT2
;0xc7fff7d
;0xc7fff7e
;0xc7fff7f
;0xc7fff80------>HandleEINT1
;0xc7fff81
;0xc7fff82
;0xc7fff83
;0xc7fff84------>HandleEINT0
;0xc7fff85
;0xc7fff86
;0xc7fff87
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