?? 2440init.s
字號(hào):
;=========================================
; 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
$HandlerLabel
sub sp,sp,#4 ;decrement sp(to store jump address)
stmfd sp!,{r0} ;PUSH the work register to stack(lr does't push because it return to original address)
ldr r0,=$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$$RO$$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 Main ; The main entry of mon program
AREA Init,CODE,READONLY
ENTRY
;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't 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
;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.
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]
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
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
LTORG
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}
;=======
; 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,=0x3ff ;all sub interrupt disable
str r1,[r0]
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;; Max1718 1.35V Setting ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; rGPBDAT=(rGPBDAT&0x77f)|(0<<7); //D4
; rGPFDAT=(rGPFDAT&0x0f)|(1<<7)|(0<<6)|(0<<5)|(0<<4); //D3~0
; rGPBCON=(rGPBCON&0x3f3fff)|(1<<14); // GPB7: Output
; rGPFCON=(rGPFCON&0x00ff)|(0x5500); // GPF4~7: Output
; rGPBDAT&=~(1<<8); //Latch enable
; rGPBCON=(rGPBCON&0x3cffff)|(1<<16); // GPB8: Output
; rGPBDAT|=(1<<10); //Output enable
; rGPBCON=(rGPBCON&0x0fffff)|(1<<20); // GPB10: Output
; rGPBDAT|=(1<<8); //Latch disable
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; rGPBDAT=(rGPBDAT&0x77f)|(0<<7); //D4
; ldr r0,=GPBDAT
; ldr r1, =(0<<7)
; str r1,[r0]
; rGPFDAT=(rGPFDAT&0x0f)|(1<<7)|(0<<6)|(0<<5)|(0<<4); //D3~0
; ldr r0,=GPFDAT
; ldr r1,=(1<<7)|(0<<6)|(0<<5)|(0<<4)
; str r1,[r0]
; rGPBCON=(rGPBCON&0x3f3fff)|(1<<14); // GPB7: Output
; ldr r0,=GPBCON
; ldr r1,=(1<<14)
; str r1,[r0]
; rGPFCON=(rGPFCON&0x00ff)|(0x5500); // GPF4~7: Output
; ldr r0,=GPFCON
; ldr r1,=(0x5500)
; str r1,[r0]
; rGPBDAT&=~(1<<8); //Latch enable
; ldr r0,=GPBDAT
; ldr r1, [r0]
; bic r1, r1, #(1<<8)
; str r1,[r0]
; rGPBCON=(rGPBCON&0x3cffff)|(1<<16); // GPB8: Output
; ldr r0,=GPBCON
; ldr r1, [r0]
; bic r1, r1, #(1<<16)
; orr r1, r1, #(1<<16)
; str r1,[r0]
; rGPBDAT|=(1<<10); //Output enable
; ldr r0,=GPBDAT
; ldr r1, [r0]
; orr r1, r1, #(1<<10)
; str r1,[r0]
; rGPBCON=(rGPBCON&0x0fffff)|(1<<20); // GPB10: Output
?? 快捷鍵說(shuō)明
復(fù)制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號(hào)
Ctrl + =
減小字號(hào)
Ctrl + -