u-boot-2012.04.01移植到mini2440①

一、初步搭建2440需要的文件

1.修改uboot目录下的boards.cfg，模仿smdk2410添加

mini2440                     arm         arm920t     -                   samsung        s3c24x0

2.在board/samsung/下 cp -r smdk2410 ./mini2440

　　修改makefile

　　COBJS := mini2440.o
　　SOBJS := lowlevel_init.o

　include/configs下 cp smdk2410.h mini2440.h

到此，已经完成初步工作。

二、修改代码以在2440的norflash上跑起uboot，主要完成串口的输出

1.vim arch/arm/cpu/arm920t/start.S

修改时钟

 1         ldr     r1, =0x7fff
 2         ldr     r0, =INTSUBMSK
 3         str     r1, [r0]
 4 
 5         ldr r0, =0x4c000000
 6         ldr r1, =0xffffffff
 7         str r1, [r0]
 8 
 9         ldr r0, =0x4c000014
10         mov r1, #0x05
11         str r1, [r0]
12 
13         mrc   p15, 0, r1, c1, c0, 0
14         orr    r1, r1, #0xc0000000
15         mcr     p15, 0, r1, c1, c0, 0
16 
17         ldr r0, =0x4c000004
18         ldr r1, =0x5c011
19         str r1, [r0]

修改mini2440/lowlevel_init.S最后对sdram的寄存器配置

SMRDATA:
.long 0x22011110 @ BWSCON
.long 0x00000700 @ BANKCON0
.long 0x00000700 @ BANKCON1
.long 0x00000700 @ BANKCON2
.long 0x00000700 @ BANKCON3
.long 0x00000700 @ BANKCON4
.long 0x00000700 @ BANKCON5
.long 0x00018005 @ BANKCON6
.long 0x00018005 @ BANKCON7
.long 0x008C07A3 @ REFRESH
.long 0x000000B1 @ BANKSIZE
.long 0x00000030 @ MRSRB6
.long 0x00000030 @ MRSRB7

 

发现宏定义是黑色的

 

增加对get_HCLK的支持添加2440头文件的定义CONFIG_S3C2440

s3c2410_nand.c: In function 's3c2410_hwcontrol':s3c2410_nand.c:57: warning: implicit declaration of function 's3c2410_get_base_nand's3c2410_nand.c:57: warning: initialization makes pointer from integer without a casts3c2410_nand.c:72: error: dereferencing pointer to incomplete types3c2410_nand.c:72: error: dereferencing pointer to incomplete types3c2410_nand.c:75: error: dereferencing pointer to incomplete types3c2410_nand.c:75: error: dereferencing pointer to incomplete types3c2410_nand.c: In function 's3c2410_dev_ready':s3c2410_nand.c:85: warning: initialization makes pointer from integer without a casts3c2410_nand.c:87: error: dereferencing pointer to incomplete types3c2410_nand.c: In function 'board_nand_init':s3c2410_nand.c:129: warning: initialization makes pointer from integer without a casts3c2410_nand.c:150: error: dereferencing pointer to incomplete types3c2410_nand.c:153: error: dereferencing pointer to incomplete types3c2410_nand.c:154: error: dereferencing pointer to incomplete type

报错

注释include/configs/mini2440.h中的CONFIG_CMD_NAND先取消对nand的支持

 若编译会出现yaffscfg.c:210: undefined reference to `nand_info'

要注释掉CONFIG_YAFFS2，可以完成编译，这时，串口已经能正确输出了。

但是会出现Flash: *** failed ***

　　　　　### ERROR ### Please RESET the board ###

这样的提示，通过搜索Flash:

找到\u-boot-2012.04.01\arch\arm\lib\Board.c下的hang()，把board_init_r函数中的hang注释掉。编译后就能启动uboot了

但是需要进一步添加其他的支持。

在include/configs/mini2440.h中修改

#define CONFIG_SYS_PROMPT       "MINI2440 # "

可以把提示符改掉。

posted @ 2013-04-09 12:19  memoryaty  阅读(423)  评论(0)  编辑  收藏  举报