?? nand_s.s
字號:
;
; 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.
;
;*************************************************************
; NAME : NAND FLASH Subroutine for a410 bootstrap
; DATE : 18.FEB.2002
; DESC :
; 02.18.2002:purnnamu: modified for A410
; 04.24.2002:purnnamu: optimized for NAND flash bootstrap
;*************************************************************
A410_BASE_ADDR EQU 0x2000000
MACRO
LDR4STR1 $src,$tmp1,$tmp2
ldrb $tmp1,[$src]
ldrb $tmp2,[$src]
orr $tmp1,$tmp1,$tmp2,LSL #8
ldrb $tmp2,[$src]
orr $tmp1,$tmp1,$tmp2,LSL #16
ldrb $tmp2,[$src]
orr $tmp1,$tmp1,$tmp2,LSL #24
MEND
AREA |C$$code|, CODE, READONLY
EXPORT __RdPage512
__RdPage512
;input:a1(r0)=pPage
stmfd sp!,{r1-r11}
ldr r1,=0x4e00000c ;NFDATA
mov r2,#0x200
0
LDR4STR1 r1,r4,r3
LDR4STR1 r1,r5,r3
LDR4STR1 r1,r6,r3
LDR4STR1 r1,r7,r3
LDR4STR1 r1,r8,r3
LDR4STR1 r1,r9,r3
LDR4STR1 r1,r10,r3
LDR4STR1 r1,r11,r3
stmia r0!,{r4-r11}
subs r2,r2,#32
bne %B0
ldmfd sp!,{r1-r11}
mov pc,lr
EXPORT __RdPage256
__RdPage256
;input:a1(r0)=pPage
stmfd sp!,{r1-r11}
ldr r1,=0x4e00000c ;NFDATA
mov r2,#0x100
0
LDR4STR1 r1,r4,r3
LDR4STR1 r1,r5,r3
LDR4STR1 r1,r6,r3
LDR4STR1 r1,r7,r3
LDR4STR1 r1,r8,r3
LDR4STR1 r1,r9,r3
LDR4STR1 r1,r10,r3
LDR4STR1 r1,r11,r3
stmia r0!,{r4-r11}
subs r2,r2,#32
bne %B0
ldmfd sp!,{r1-r11}
mov pc,lr
END
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