boot.s

pxa270驱动程序

	IMPORT	postDelay
	IMPORT	post_initGpio
	IMPORT	dummyOs
         IMPORT   post_LcdController
         IMPORT   backlight_cs
         IMPORT   lcdlight 
         IMPORT   stack_myself
         IMPORT   init_Memory
         IMPORT   screen_clean


	AREA boot ,CODE ,READONLY

	ENTRY

	b post
	nop
	nop
	nop

;0x10
	nop
	nop
	nop
	nop

;0x20
	nop
	nop
	nop
	nop

;0x30
	nop
	nop
	nop
	nop

;0x40
	nop
	nop
	nop
	nop

;0x50
	nop
	nop
	nop
	nop

;0x60
	nop
	nop
	nop
	nop

;0x70
	nop
	nop
	nop
	nop

;/////////
;this post routine body
;////////

post

         mov r14,pc
	ldr pc,=post_initGpio  

	mov r14,pc
 	ldr pc,=init_Memory

         ldr r11, =stack_myself
         mov r13, r11

         mov r14,pc
         ldr pc, =screen_clean


         mov r14,pc
         ldr pc,=post_LcdController

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

	ldr r0,=postDelay

postLoop	
	sub r0,r0,#0x1
	cmp r0,#0x0
	bne postLoop




	MOV          R0,#0xa000000		;turn on the light of board
	LDRH          R2,[R0,#0]
	AND 	R2,R2,#0xFFFFCFFF
	STRH          R2,[R0,#0]

	MOV          R0,#0xa000000
	LDRH          R2,[R0,#0]		;turn on backlight
	ORR 	R2,R2,#0x100
	STRH          R2,[R0,#0]

        

	ldr pc,=dummyOs
	END