nand_s.s
资源名称:SMDK2440.rar [点击查看]
上传用户:qiulin1960
上传日期:2013-10-16
资源大小:2844k
文件大小:2k
源码类别:
Windows CE
开发平台:
Windows_Unix
- ;
- ; 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,=0x4e000010 ;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,=0x4e000010 ;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