成功移植uboot116到edukitIII.docx

1、成功移植uboot116到edukitIII待修改，由于时间关系还没整理完善，先把主要步骤列出：有关于Retry count exceeded; starting again错误即将描述一、先实现可从nand flash启动1.在u-boot-1.2.0/Makefile中diff -urNu-boot-1.2.0.orig/Makefile u-boot-1.2.0/Makefile-u-boot-1.2.0.orig/Makefile 2007-01-0707:13:11.000000000 +0800+u-boot-1.2.0/Makefile 2007-09-1912:09:20.00

2、0000000 +0800 -125,7+125,7 CROSS_COMPILE = powerpc-linux-endififeq ($(ARCH),arm)-CROSS_COMPILE = arm-linux-+CROSS_COMPILE =/usr/local/arm/arm-2007q1/bin/arm-none-linux-gnueabi-endif 这是需要修改的第一段代码其实就是把/u-boot-1.2.0/Makefile程序第125行改了，其实就是设定交叉编译器，这段代码是很好的学习材料这就是一个补丁的制作过程diff：以u-boot-1.2.0/Makefile为目标文件，

3、以u-boot-1.2.0.orig/Makefile为源文件2.在u-boot-1.2.0/board/smdk2410/中Makefilediff -urN u-boot-1.2.0.orig/board/smdk2410/Makefileu-boot-1.2.0/board/smdk2410/Makefile-u-boot-1.2.0.orig/board/smdk2410/Makefile 2007-01-0707:13:11.000000000 +0800+u-boot-1.2.0/board/smdk2410/Makefile 2007-09-1912:22:24.00000000

4、0 +0800 -25,7 +25,7 LIB = $(obj)lib$(BOARD).a-COBJS := smdk2410.o flash.o+COBJS := smdk2410.o flash.onand_read.oSOBJS :=lowlevel_init.oSRCS := $(SOBJS:.o=.S)$(COBJS:.o=.c)lowlevel_init.Sdiff -urNu-boot-1.2.0.orig/board/smdk2410/lowlevel_init.Su-boot-1.2.0/board/smdk2410/lowlevel_init.S-u-boot-1.2.0.

5、orig/board/smdk2410/lowlevel_init.S 2007-01-0707:13:11.000000000 +0800+u-boot-1.2.0/board/smdk2410/lowlevel_init.S 2007-09-1912:22:08.000000000 +0800 -123,7 +123,7 #define Trp0x0 #define Trc0x3 #define Tchr0x2 -#define REFCNT1113 +#defineREFCNT1268 _TEXT_BASE:新建文件nand_read.cdiff -urNu-boot-1.2.0.ori

6、g/board/smdk2410/nand_read.cu-boot-1.2.0/board/smdk2410/nand_read.c-u-boot-1.2.0.orig/board/smdk2410/nand_read.c 1970-01-0108:00:00.000000000 +0800+u-boot-1.2.0/board/smdk2410/nand_read.c 2007-09-1912:24:13.000000000 +0800 -0,0 +1,77 +#include+#ifdef CONFIG_S3C2410_NAND_BOOT+#define _REGb(x) (*(vola

7、tile unsigned char*)(x)+#define _REGi(x) (*(volatile unsigned int*)(x)+#defineNF_BASE0x4e000000+#define NFCONF_REGi(NF_BASE +0x0)+#define NFCMD_REGb(NF_BASE +0x4)+#define NFADDR_REGb(NF_BASE +0x8)+#define NFDATA_REGb(NF_BASE +0xc)+#define NFSTAT_REGb(NF_BASE +0x10)+#define BUSY 1+inline void wait_id

8、le(void) + inti;+ while(!(NFSTAT & BUSY)+ for(i=0; i512+#defineNAND_BLOCK_MASK(NAND_SECTOR_SIZE- 1)+int+nand_read_ll(unsigned char *buf, unsigned long start_addr, intsize)+ int i,j;+ if(start_addr & NAND_BLOCK_MASK) | (size& NAND_BLOCK_MASK) + return -1; + + + NFCONF&= 0x800;+ for(i=0;ifor(i=start_a

9、ddr; i + NFCMD = 0;+ + NFADDR = i & 0xff;+ NFADDR = (i 9) &0xff;+ NFADDR = (i 17) &0xff;+ NFADDR = (i 25) &0xff;+ wait_idle();+ for(j=0; j *buf = (NFDATA & 0xff);+ buf+;+ + + + NFCONF |=0x800; + return0;+#endifsmdk2410.cdiff -urN u-boot-1.2.0.orig/board/smdk2410/smdk2410.cu-boot-1.2.0/board/smdk2410

10、/smdk2410.c-u-boot-1.2.0.orig/board/smdk2410/smdk2410.c 2007-01-0707:13:11.000000000 +0800+u-boot-1.2.0/board/smdk2410/smdk2410.c 2007-09-1912:21:39.000000000 +0800 -36,10 +36,10 #define M_MDIV 0xC3#define M_PDIV 0x4#define M_SDIV 0x1-#elif FCLK_SPEED=1-#define M_MDIV 0xA1-#define M_PDIV 0x3-#define

11、 M_SDIV 0x1+#elifFCLK_SPEED=1+#define M_MDIV 0x5C+#define M_PDIV 0x4+#defineM_SDIV 0x0#endif#define USB_CLOCK 1 -87,7 +87,7 gpio-GPACON =0x007FFFFF;- gpio-GPBCON = 0x00044555;+ gpio-GPBCON =0x000055A;gpio-GPBUP= 0x000007FF;gpio-GPCCON =0xAAAAAAAA;gpio-GPCUP =0x0000FFFF; -99,7 +99,7 gpio-GPFUP =0x000

12、000FF;gpio-GPGCON =0xFF95FFBA;gpio-GPGUP =0x0000FFFF;- gpio-GPHCON = 0x002AFAAA;+ gpio-GPHCON =0x0016FAAA;gpio-GPHUP= 0x000007FF;3.在u-boot-1.2.0/cpu/arm920t中start.S(第一层汇编程序入口）diff -urN u-boot-1.2.0.orig/cpu/arm920t/start.Su-boot-1.2.0/cpu/arm920t/start.S-u-boot-1.2.0.orig/cpu/arm920t/start.S 2007-01

13、-0707:13:11.000000000 +0800+ u-boot-1.2.0/cpu/arm920t/start.S 2007-09-1912:37:00.000000000 +0800 -27,7 +27,7 #include#include-+#includeldr r0,=INTSUBMSKstr r1,r0# endif -161,6 +161,7 #endif#ifndef CONFIG_SKIP_RELOCATE_UBOOT+#ifndefCONFIG_S3C2410_NAND_BOOTrelocate: adr r0,_startldr r1,_TEXT_BASE -177

14、,8 +178,67 stmia r1!,r3-r10cmp r0,r2 ble copy_loop+#else+relocate:+copy_myself:+ reset NAND+ mov r1,#S3C2410_NAND_BASE+ ldr r2,=0xf830 initial valueenable+ str r2, r1, #oNFCONF+ ldr r2, r1, #oNFCONF+ bic r2, r2,#0x800 enable chip+ str r2, r1, #oNFCONF+ mov r2,#0xff RESET command+ strb r2, r1, #oNFCM

15、D+ mov r3,#0 wait+1: add r3, r3, #0x1+ cmp r3, #0xa+ blt 1b+2: ldr r2, r1,#oNFSTAT wait ready+ tst r2, #0x1+ beq 2b+ ldr r2, r1, #oNFCONF+ orr r2, r2,#0x800 disable chip+ str r2, r1, #oNFCONF+ + ldr r0,_TEXT_BASE + sub r0, r0,#CFG_MALLOC_LEN+ sub r0, r0,#CFG_GBL_DATA_SIZE +#ifdef CONFIG_USE_IRQ+ sub

16、 r0, r0,#(CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ)+#endif+ sub sp, r0,#12 + copy u-boot to RAM+ ldr r0, _TEXT_BASE+ mov r1, #0x0+ mov r2, #CFG_UBOOT_SIZE+ bl nand_read_ll+ tst r0, #0x0+ beq ok_nand_read+ok_nand_read:+ verify+ mov r0, #0+ ldr r1, _TEXT_BASE+ mov r2,#0x400 4 bytes * 1024 = 4K-bytes+

17、go_next:+ ldr r3, r0, #4+ ldr r4, r1, #4+ teq r3, r4+ bne notmatch+ subs r2, r2, #4+ beq done_nand_read+ bne go_next+notmatch:+1: b 1b+done_nand_read:+#endif#endif +#ifndefCONFIG_S3C2410_NAND_BOOTstack_setup:ldr r0,_TEXT_BASE -188,6 +248,7 sub r0, r0,#(CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ)#endi

18、fsub sp, r0,#12+#endifclear_bss:ldr r0,_bss_start4.在u-boot-1.2.0/include/Configs/smdk2410.h中diff -urN u-boot-1.2.0.orig/include/configs/smdk2410.hu-boot-1.2.0/include/configs/smdk2410.h-u-boot-1.2.0.orig/include/configs/smdk2410.h 2007-01-0707:13:11.000000000 +0800+u-boot-1.2.0/include/configs/smdk2

19、410.h 2007-09-1912:42:45.000000000 +0800 -82,6 +82,8 + CFG_CMD_NET | + CFG_CMD_PING | CFG_CMD_REGINFO | CFG_CMD_DATE | CFG_CMD_ELF) -91,10 +93,10 #define CONFIG_BOOTDELAY 3-+#defineCONFIG_ETHADDR08:00:3e:26:0a:5b#defineCONFIG_NETMASK 255.255.255.0-#defineCONFIG_IPADDR10.0.0.110-#defineCONFIG_SERVERI

20、P10.0.0.1+#defineCONFIG_IPADDR192.168.1.110+#defineCONFIG_SERVERIP192.168.1.216 -108,7 +110,7 * Miscellaneous configurable options*/#define CFG_LONGHELP -#define CFG_PROMPTSMDK2410# +#define CFG_PROMPTU-boot# #define CFG_CBSIZE256#define CFG_PBSIZE(CFG_CBSIZE+sizeof(CFG_PROMPT)+16)#define CFG_MAXARG

21、S16 -178,4 +180,8 #define CFG_ENV_IS_IN_FLASH 1#defineCFG_ENV_SIZE0x10000 +#define CONFIG_S3C2410_NAND_BOOT+#defineCFG_UBOOT_SIZE0x20000+#endif 5.在u-boot-1.2.0/include/s3c2410.hdiff -urN u-boot-1.2.0.orig/include/s3c2410.hu-boot-1.2.0/include/s3c2410.h- u-boot-1.2.0.orig/include/s3c2410.h 2007-01-07

22、07:13:11.000000000 +0800+ u-boot-1.2.0/include/s3c2410.h 2007-09-1912:38:31.000000000 +0800 -38,12 +38,6 #defineS3C2410_ECCSIZE512#define S3C2410_ECCBYTES 3-typedef enum - S3C24X0_UART0,- S3C24X0_UART1,- S3C24X0_UART2- S3C24X0_UARTS_NR;-#defineS3C24X0_MEMCTL_BASE0x48000000#defineS3C24X0_USB_HOST_BAS

23、E0x49000000 -64,10 +58,23 #defineS3C24X0_SPI_BASE0x59000000#defineS3C2410_SDI_BASE0x5A000000+#defineoNFCONF 0x00+#defineoNFCMD 0x04+#defineoNFADDR 0x08+#defineoNFDATA 0x0C+#defineoNFSTAT 0x10+#defineoNFECC 0x14+#ifndef _ASSEMBLER_#include+typedef enum + S3C24X0_UART0,+ S3C24X0_UART1,+ S3C24X0_UART2+

24、 S3C24X0_UARTS_NR;static inline S3C24X0_MEMCTL * constS3C24X0_GetBase_MEMCTL(void) -224,4 +231,7 rINTPND; +#endif+#endif二、再实现支持nand flash 读写的部分（可以去掉2440的部分）：U-Boot 1.1.6中对NANDFlash的支持有新旧两套代码，新代码在drivers/nand目录下，旧代码在drivers/nand_legacy目录下。文档doc/README.nand对这两套代码有所说明：使用旧代码需要定义更多的宏，而新代码移植自Linux内核2.6.12

25、，它更加智能，可以自动识别更多型号的NANDFlash。目前之所以还保留旧的代码，是因为两个目标板NETTA、NETTA_ISDN使用JFFS文件系统，它们还依赖于旧代码。当相关功能移植到新代码之后，旧的代码将从U-Boot中去除。 要让U-Boot支持NAND Flash，首先在配置文件include/configs/100ask24x0.h的宏CONFIG_COMMANDS中增加CFG_CMD_NAND，如下： #define CONFIG_COMMANDS (CONFIG_CMD_DFL | CFG_CMD_CACHE | CFG_CMD_PING | CFG_CMD_NAND| 然后选

26、择使用哪套代码：在配置文件中定义宏CFG_NAND_LEGACY则使用旧代码，否则使用新代码。 使用旧代码时，需要实现drivers/nand_legacy/nand_legacy.c中使用到的各种宏，比如： #define NAND_WAIT_READY(nand)/* 等待Nand Flash的状态为“就绪”，代码依赖于具体的开发板 */ #define WRITE_NAND_COMMAND(d, adr)/* 写NAND Flash命令，代码依赖于具体的开发板 */ 本书使用新代码，下面讲述移植过程。 代码的移植没有现成的文档，可以在配置文件include/configs/100ask2

27、4x0.h的宏CONFIG_COMMANDS中增加CFG_CMD_NAND后，就编译代码，然后一个一个地解决出现的错误。编译结果中出现的错误和警告如下： nand.h:412: error: NAND_MAX_CHIPS undeclared here (not in a function) nand.c:35: error: CFG_MAX_NAND_DEVICE undeclared here (not in a function) nand.c:38: error: CFG_NAND_BASE undeclared here (not in a function) nand.c:35: error: storage size of nand_info isnt known nand.c:37: error: storage size of nand_chip isnt known nand.c:38: error: storage size of base_address isnt known nand.c:37: warning: nand_chip defined but not used nand.c:38: warning: base_address defined but not used 在配置文件include/