ocld_asm.s

来自「SAMSUNG S3C6410 CPU BSP for winmobile6」· S 代码 · 共 120 行

;
; Copyright (c) Microsoft Corporation.  All rights reserved.
;
;
; Use of this source code is subject to the terms of the Microsoft end-user
; license agreement (EULA) under which you licensed this SOFTWARE PRODUCT.
; If you did not accept the terms of the EULA, you are not authorized to use
; this source code. For a copy of the EULA, please see the LICENSE.RTF on your
; install media.
;
    ; 
    ; NAND(SmartCard) Related Routines
    ;      

    INCLUDE kxarm.h
        
    TEXTAREA

		EXPORT OneNand4burstPageRead
		EXPORT OneNand4burstPageWrite
		EXPORT OneNand8burstPageRead
		EXPORT OneNand8burstPageWrite

    ;
    ; Read, 4 burst Page Read
    ;
	
	LEAF_ENTRY OneNand4burstPageRead
	; r0 : OneNand Device Source Address
	; r1 : Destination Address(DRAM)
	; r2 : Transfer Size(4Byte unit)
	stmfd	r13!, {r0-r3,r9-r12}
	mov		r3, r2						; Count to move (0x80*4burst*4byte + 0x4*4burst*4byte = 2KB + 64B)

read_page				
	ldmia	r0, {r9-r12}					; 
	stmia	r1!, {r9-r12}					; 
	subs	r3, r3, #0x1						; Count decrement
	bne		read_page 

	ldmfd	r13!, {r0-r3,r9-r12}

	mov		pc, lr

;	ENTRY_END

				
    ;
    ; Write, 4 burst Page Write
    ;

	LEAF_ENTRY OneNand4burstPageWrite
	; r0 : Source Address(DRAM)
	; r1 : OneNand Device Destination Address
	; r2 : Transfer Size(4Byte unit)
	stmfd	r13!, {r0-r3,r9-r12}
	mov		r3, r2						; Count to move (0x80*4burst*4byte + 0x4*4burst*4byte = 2KB + 64B)

write_page				
	ldmia	r0!, {r9-r12}					; 
	stmia	r1, {r9-r12}					; 
	subs	r3, r3, #0x1						; Count decrement
	bne		write_page 

	ldmfd	r13!, {r0-r3,r9-r12}

	mov		pc, lr

;	ENTRY_END


    ;
    ; Read, 8 burst Page Read, use map01 only
    ;
	
 	LEAF_ENTRY OneNand8burstPageRead
	; r0 : OneNand Device Source Address
	; r1 : Destination Address(DRAM)
	; r2 : Transfer Size(4Byte unit)
	stmfd	r13!, {r0-r3,r5-r12}
	mov		r3, r2						; Count to move (0x40*8burst*4byte + 0x2*8burst*4byte = 2KB + 64B)

read_page_8			
	ldmia	r0, {r5-r12}					; 
	stmia	r1!, {r5-r12}					; 
	subs	r3, r3, #0x1						; Count decrement
	bne		read_page_8	 

	ldmfd	r13!, {r0-r3,r5-r12}

	mov		pc, lr
				
;	ENTRY_END
    ;
    ; Write, 8 burst Page Write, use map01 only
    ;

	LEAF_ENTRY OneNand8burstPageWrite
	; r0 : Source Address(DRAM)
	; r1 : OneNand Device Destination Address
	; r2 : Transfer Size(4Byte unit)
	stmfd	r13!, {r0-r3,r5-r12}
	mov		r3, r2						; Count to move (0x40*8burst*4byte + 0x2*8burst*4byte = 2KB + 64B)

write_page_8				
	ldmia	r0!, {r5-r12}					; 
	stmia	r1, {r5-r12}					; 
	subs	r3, r3, #0x1						; Count decrement
	bne		write_page_8 

	ldmfd	r13!, {r0-r3,r5-r12}

	mov		pc, lr
	
;	ENTRY_END	
	LTORG


    END