移植UBoot120到博创2410S.docx

1、移植UBoot120到博创2410S移植UBoot.1.2.0到博创2410S （转自）移植UBoot.1.2.0到博创2410S（S3C2410A）一、在U-Boot中建立自己的开发板类型，并测试编译。我为开发板取名叫: tekkaman24100 在工作目录下解压UBoot。$tar zxvf u-boot.git.tar.gz1 进入U-Boot目录，修改Makefile$cd u-boot.git/$vi Makefile#为tekkaman2410建立编译项smdk2410_config : unconfig $(MKCONFIG) $(:_config=) arm arm920t

2、smdk2410 NULL s3c24x0tekkaman2410_config : unconfig $(MKCONFIG) $(:_config=) arm arm920t tekkaman2410 tekkaman s3c24x0各项的意思如下:arm: CPU的架构(ARCH)arm920t: CPU的类型(CPU)，其对应于cpu/arm920t子目录。tekkaman2410: 开发板的型号(BOARD)，对应于board/tekkaman/tekkaman2410目录。tekkaman: 开发者/或经销商(vender)。s3c24x0: 片上系统(SOC)。同时在“ifndef

3、 CROSS_COMPILE ”之前 加上自己交叉编译器的路径，比如我使用crosstool-0.43制作的基于2.6.22.2内核和gcc-4.1.0-glibc-2.3.2的ARM9TDMI交叉编译器，则：CROSS_COMPILE=/home/tekkaman/working/crosstool-gcc410-k26222/gcc-4.1.0-glibc-2.3.2/arm-9tdmi-linux-gnu/bin/arm-9tdmi-linux-gnu-2 在/board子目录中建立自己的开发板tekkaman2410目录由于我在上一步板子的开发者/或经销商(vender)中填了 tek

4、kaman ，所以开发板tekkaman2410目录一定要建在/board子目录中的tekkaman目录下 ，否则编译会出错。$cd board$mkdir tekkaman tekkaman/tekkaman2410$cp -arf smdk2410/* tekkaman/tekkaman2410/$cd tekkaman/tekkaman2410$mv smdk2410.c tekkaman2410.c还要记得修改自己的开发板tekkaman2410目录下的Makefile文件，不然编译时会出错：COBJS := tekkaman2410.o flash.o$vi Makefile3 在i

5、nclude/configs/中建立配置头文件$cd ././.$cp include/configs/smdk2410.h include/configs/tekkaman2410.h4 测试编译能否成功$make tekkaman2410_configConfiguring for tekkaman2410 board.(如果出现：$ make tekkaman2410_configMakefile:1927: * 遗漏分隔符 。 停止。请在Uboot的根目录下的Makefile的$(MKCONFIG) $(:_config=) arm arm920t tekkaman2410 tekka

6、man)前加上“Tab”键）$make我到这一步测试交叉编译成功！二、修改UBoot中的文件，以匹配博创的2410S实验箱。1 修改/cpu/arm920t/start.S(1)修改中断禁止部分# if defined(CONFIG_S3C2410) ldr r1, =0x7ff /根据2410芯片手册，INTSUBMSK有11位可用，/vivi也是0x7ff，不知为什么UBoot一直没改过来。 ldr r0, =INTSUBMSK str r1, r0# endif(2)修改时钟设置（可以不修改，因为后面的board_init函数也会将时钟设为202.8MHz）/* FCLK:HCLK:PC

7、LK = 1:2:4 */* default FCLK is 120 MHz ! */ldr r0, =CLKDIVN mov r1, #3 str r1, r0mrc p15, 0, r1, c1, c0, 0 /*read ctrl register tekkaman*/ orr r1, r1, #0xc0000000 /*Asynchronous tekkaman*/ mcr p15, 0, r1, c1, c0, 0 /*write ctrl register tekkaman*/ /*now, CPU clock is 202.8 Mhz tekkaman*/ mov r1, #CL

8、K_CTL_BASE /* tekkaman*/ mov r2, #MDIV_200 /* mpll_200mhz tekkaman*/ add r2, r2, #PSDIV_200 /* mpll_200mhz tekkaman*/ str r2, r1, #0x04 /* MPLLCON tekkaman */#endif /* CONFIG_S3C2400 | CONFIG_S3C2410 */红色部分是我添加的，因为 UBoot 使用的是 /* default FCLK is 120 MHz ! */我利用博创提供的vivi的代码，将其设为202.8MHz 并在前面加上：#elif d

9、efined(CONFIG_S3C2410)# define pWTCON 0x53000000# define INTMSK 0x4A000008 /* Interupt-Controller base addresses */# define INTSUBMSK 0x4A00001C# define CLKDIVN 0x4C000014 /* clock divisor register */#define CLK_CTL_BASE 0x4C000000 /* tekkaman */#define MDIV_200 0xa1 #define PSDIV_200 0x31 /* tekkam

10、an */(3)将从Flash启动改成从NAND Flash启动。将以下UBoot的重定向语句段：#ifndef CONFIG_SKIP_RELOCATE_UBOOTrelocate: /* relocate U-Boot to RAM */adr r0, _start /* r0 #ifdef CONFIG_S3C2410_NAND_BOOT tekkamanSSSSSSSSSSSSS reset NAND mov r1, #NAND_CTL_BASE ldr r2, =0xf830 initial value str r2, r1, #oNFCONF ldr r2, r1, #oNFCON

11、F bic r2, r2, #0x800 enable chip str r2, r1, #oNFCONF mov r2, #0xff RESET command strb r2, r1, #oNFCMD mov r3, #0 waitnand1: add r3, r3, #0x1 cmp r3, #0xa blt nand1nand2: ldr r2, r1, #oNFSTAT wait ready tst r2, #0x1 beq nand2 ldr r2, r1, #oNFCONF orr r2, r2, #0x800 disable chip str r2, r1, #oNFCONF

12、get read to call C functions (for nand_read() ldr sp, DW_STACK_START setup stack pointer mov fp, #0 no previous frame, so fp=0 copy U-Boot to RAM ldr r0, =TEXT_BASE mov r1, #0x0 mov r2, #0x20000 bl nand_read_ll tst r0, #0x0 beq ok_nand_readbad_nand_read:loop2: b loop2 infinite loopok_nand_read: veri

13、fy mov r0, #0 ldr r1, =TEXT_BASE mov r2, #0x400 4 bytes * 1024 = 4K-bytesgo_next: ldr r3, r0, #4 ldr r4, r1, #4 teq r3, r4 bne notmatch subs r2, r2, #4 beq stack_setup bne go_nextnotmatch:loop3: b loop3 infinite loop#endif CONFIG_S3C2410_NAND_BOOT tekkamanEEEEEEEEE在 “ _start_armboot: .word start_arm

14、boot ” 后加入：.align 2DW_STACK_START: .word STACK_BASE+STACK_SIZE-4附：顺便提一下，在start.S文件的注释部分有个小错误（红色部分：原来是2）：cpu_init_crit:./* disable MMU stuff and caches*/mrc p15, 0, r0, c1, c0, 0bic r0, r0, #0x00002300 clear bits 13, 9:8 (-V- -RS)bic r0, r0, #0x00000087 clear bits 7, 2:0 (B- -CAM)orr r0, r0, #0x00000

15、002 set bit 1 (A) Align.2 在board/tekkaman/tekkaman2410加入NAND Flash读函数，建立nand_read.c文件，加入如下内容(copy from vivi)：#include #define _REGb(x) (*(volatile unsigned char *)(x)#define _REGi(x) (*(volatile unsigned int *)(x)#define NF_BASE 0x4e000000#define NFCONF _REGi(NF_BASE + 0x0)#define NFCMD _REGb(NF_BAS

16、E + 0x4)#define NFADDR _REGb(NF_BASE + 0x8)#define NFDATA _REGb(NF_BASE + 0xc)#define NFSTAT _REGb(NF_BASE + 0x10)#define BUSY 1inline void wait_idle(void) int i;while(!(NFSTAT & BUSY)for(i=0; i/* low level nand read function */intnand_read_ll(unsigned char *buf, unsigned long start_addr, int size)i

17、nt i, j;if (start_addr & NAND_BLOCK_MASK) | (size & NAND_BLOCK_MASK) return -1; /* invalid alignment */* chip Enable */NFCONF &= 0x800;for(i=0; ifor(i=start_addr; i /* Write Address */NFADDR = i & 0xff;NFADDR = (i 9) & 0xff;NFADDR = (i 17) & 0xff;NFADDR = (i 25) & 0xff;wait_idle();for(j=0; j /* chip

18、 Disable */NFCONF |= 0x800; /* chip disable */return 0;3 修改board/tekkaman/tekkaman2410/Makefile文件.OBJS := tekkaman2410.o nand_read.o .4 修改include/configs/tekkaman2410.h文件，添加如下内容：./* Nandflash Boot*/#define CONFIG_S3C2410_NAND_BOOT 1#define STACK_BASE 0x33f00000#define STACK_SIZE 0x8000/#define UBOOT

19、_RAM_BASE 0x33f80000/* NAND Flash Controller */#define NAND_CTL_BASE 0x4E000000#define bINT_CTL(Nb) _REG(INT_CTL_BASE + (Nb)/* Offset */#define oNFCONF 0x00#define oNFCMD 0x04#define oNFADDR 0x08#define oNFDATA 0x0c#define oNFSTAT 0x10#define oNFECC 0x14#endif /* _CONFIG_H */5 修改board/tekkaman/tekka

20、man2410/lowlevel_init.S文件依照开发箱的内存区的配置情况, 修改board/tekkaman/tekkaman2410/lowlevel_init.S文件，我利用博创提供的vivi源码里的信息做了如下更改:.#define B1_BWSCON (DW16) /*tekkaman*/#define B2_BWSCON (DW16)#define B3_BWSCON (DW16) /*tekkaman*/#define B4_BWSCON (DW16)#define B5_BWSCON (DW16)#define B6_BWSCON (DW32)#define B7_BWSC

21、ON (DW32).#define B3_Tacs 0x0 /* 0clk */#define B3_Tcos 0x0 /* 0clk tekkaman*/ #define B3_Tacc 0x7 /* 14clk */#define B3_Tcoh 0x0 /* 0clk tekkaman*/ #define B3_Tah 0x0 /* 0clk */#define B3_Tacp 0x0 /*tekkaman*/#define B3_PMC 0x0 /* normal */.注：之所以Bank3的改动较大，是因为smdk2410的网卡CS8900是在Bank3，而博创2410S的AX887

22、96是在Bank2。. .word (B7_MT.word (REFEN .word 0xb2 /*tekkaman*/ .word 0x30 .word 0x306 修改/board/tekkaman/tekkaman2410/tekkaman2410.c因为博创2410S和smdk2410的GPIO连接有所不同，我依旧利用博创配的vivi，修改其对GPIO的配置(具体原因我并未深究，请参阅博创2410S的硬件说明和2410芯片手册)：.gpio-GPEUP = 0x0000FFFF;gpio-GPFCON = 0x000051aa; /0x000055AA; tekkaman gpio-G

23、PFUP = 0x000000ef; /0x000000FF; tekkaman gpio-GPGCON = 0xfd95ffba; /0xFF95FFBA; tekkaman gpio-GPGUP = 0x0000efff; /0x0000FFFF; tekkaman gpio-GPHCON = 0x0016faaa; /0x002AFAAA; tekkamangpio-GPHUP = 0x000007FF;.7 为了实现NAND Flash的读写，再次修改/include/configs/tekkaman2410.h(请格外注意：如果编译时报错，在Linux下用KWrite等有高亮显示的文

24、本编辑器看看文件的注释是不是为注释应有的颜色（KWrite中为灰色），如果不是,则将注释删除。因为#define后面的注释被认为是程序的一部分。建议注释和#define分行写)./* Hardware drivers*/#define CONFIG_DRIVER_CS8900 1 /* we have a CS8900 on-board */#define CS8900_BASE 0x19000300/#define CS8900_BUS16 1 /* the Linux driver does accesses as shorts */#define CONFIG_DRIVER_NE2000

25、#define CONFIG_DRIVER_NE2000_BASE (0x10000000+0x200)./* * Command definition */#define CONFIG_COMMANDS (CONFIG_CMD_DFL | CFG_CMD_CACHE | CFG_CMD_NAND | CFG_CMD_NET | /*CFG_CMD_EEPROM |*/ /*CFG_CMD_I2C |*/ /*CFG_CMD_USB |*/ CFG_CMD_PING | CFG_CMD_ENV | CFG_CMD_REGINFO | CFG_CMD_DATE | CFG_CMD_ELF)/*

26、this must be included AFTER the definition of CONFIG_COMMANDS (if any) */#include #define CONFIG_CMDLINE_TAG/增加U-Boot对内核参数传递的功能， /具体内容请参阅对U-BOOT下使用bootm引导内核方法的补充说明.#define CFG_LONGHELP /* undef to save memory */#define CFG_PROMPT Tekkaman2410# /*Monitor Command Prompt */#define CFG_CBSIZE 256 /* Con

27、sole I/O Buffer Size */.#define CFG_LOAD_ADDR 0x30008000 /* default load address */./#define PHYS_FLASH_1 0x00000000 /* Flash Bank #1 */#define CFG_FLASH_BASE PHYS_FLASH_1/*-* FLASH and environment organization*/#define CFG_NO_FLASH 1#if 0#define CONFIG_AMD_LV400 1 /* uncomment this if you have a LV

28、400 flash */#if 0#define CONFIG_AMD_LV800 1 /* uncomment this if you have a LV800 flash */#endif/#define CFG_MAX_FLASH_BANKS 1 /* max number of memory banks */./* timeout values are in ticks */#define CFG_FLASH_ERASE_TOUT (5*CFG_HZ) /* Timeout for Flash Erase */#define CFG_FLASH_WRITE_TOUT (5*CFG_HZ

29、) /* Timeout for Flash Write */#define CFG_ENV_IS_IN_NAND 1#define CFG_ENV_OFFSET 0X20000/#define ENV_IS_EMBEDDED 1#define CFG_NAND_LEGACY#define CFG_ENV_SIZE 0x10000 /* Total Size of Environment Sector */#if (CONFIG_COMMANDS & CFG_CMD_NAND)#define CFG_NAND_BASE 0x4E000000 /* NandFlash控制器在SFR区起始寄存器地址 */#define CFG_MAX_NAND_DEVICE 1/* 支持的最在Nand Flash数据 */#define SECTORSIZE 512 /* 1页的大小 */#define NAND_SECTOR_SIZE SECTORSIZE#define NAND_BLOCK_MASK 511/* 页掩码 */#define ADDR_COLUMN 1 /* 一个字节的Column地址 */