[转]移植uboot到ARMer9开发系统上, by lane@www.embeder.com |
[转]移植uboot到ARMer9开发系统上, by lane@www.embeder.com |
2007-04-27 08:55:56, Fri
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#1
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猫猫猫 Group: Power Cat Posts: 626 Joined: 2006-12-8 Member No.: 2 |
首先了解ARMer9开发系统硬件设计上和三星原装SMDK2410之间的区别。
让uboot在ARMer9开发系统上跑起来,目前只需要关注如下的硬件区别,解决了下面这个问题,uboot就可以在ARMer9开发系统上正常地从串口输出,进入提示符。很多命令都可以使用,当然有些命令需要做修改。 SMDK2410 : nor flash 是AMD的1M的; ARMer9: 是Intel E28F128J3A, 两片并联,一共32M Bytes. 下载一个uboot-1.1.1.tar.bz2.; tar jxvf uboot-1.1.1.tar.bz2; 在uboot目录board/smdk2410 下的flash.c需要修改。这个是Flash的驱动,如何写,需要参考E28F128J3A的Datasheet. 这里我们提供一个我们修改好的flash.c文件,您只需要将这个文件覆盖掉board/smdk2410 下的文件即可。 (注意:你要安装了交叉编译器才行哦) 修改uboot目录下的Makefile,将 ifeq ($(ARCH),arm) CROSS_COMPILE = arm-linux- endif 修改成 ifeq ($(ARCH),arm) CROSS_COMPILE = /opt/host/armv4l/bin/armv4l-unknown-linux- endif 修改processor.h中: union debug_insn { u32 arm; u16 thumb; } 修改成: union debug_insn { u32 arm_mode; u16 thumb_mode; } 然后配置板子 make smdk2410_config 然后 make 在uboot目录生成uboot.bin; 通过sjf2410w程序将uboot.bin下载到nor flash中, 地址为0的地方; 串口接在UART0上,uboot的启动信息将输出。 你将发现很多命令都可以使用了。uboot果然强大。
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2007-04-27 08:58:26, Fri
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#2
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猫猫猫 Group: Power Cat Posts: 626 Joined: 2006-12-8 Member No.: 2 |
再将board/mpl/vcma9/vcma9.h中下面代码拷贝到board/smdk2410/ smdk2410.c中来。
#if (CONFIG_COMMANDS & CFG_CMD_NAND) typedef enum { NFCE_LOW, NFCE_HIGH } NFCE_STATE; static inline void NF_Conf(u16 conf) { S3C2410_NAND * const nand = S3C2410_GetBase_NAND(); nand->NFCONF = conf; } static inline void NF_Cmd(u8 cmd) { S3C2410_NAND * const nand = S3C2410_GetBase_NAND(); nand->NFCMD = cmd; } static inline void NF_CmdW(u8 cmd) { NF_Cmd(cmd); udelay(1); } static inline void NF_Addr(u8 addr) { S3C2410_NAND * const nand = S3C2410_GetBase_NAND(); nand->NFADDR = addr; } static inline void NF_SetCE(NFCE_STATE s) { S3C2410_NAND * const nand = S3C2410_GetBase_NAND(); switch (s) { case NFCE_LOW: nand->NFCONF &= ~(1<<11); break; case NFCE_HIGH: nand->NFCONF |= (1<<11); break; } } static inline void NF_WaitRB(void) { S3C2410_NAND * const nand = S3C2410_GetBase_NAND(); while (!(nand->NFSTAT & (1<<0))); } static inline void NF_Write(u8 data) { S3C2410_NAND * const nand = S3C2410_GetBase_NAND(); nand->NFDATA = data; } static inline u8 NF_Read(void) { S3C2410_NAND * const nand = S3C2410_GetBase_NAND(); return(nand->NFDATA); } static inline void NF_Init_ECC(void) { S3C2410_NAND * const nand = S3C2410_GetBase_NAND(); nand->NFCONF |= (1<<12); } static inline u32 NF_Read_ECC(void) { S3C2410_NAND * const nand = S3C2410_GetBase_NAND(); return(nand->NFECC); } #endif 再将include/configs/vcma.9中下面代码拷贝到include/configs/smdk2410.h中来。 /*----------------------------------------------------------------------- * NAND flash settings */ #if (CONFIG_COMMANDS & CFG_CMD_NAND) #define CFG_MAX_NAND_DEVICE 1 /* Max number of NAND devices */ #define SECTORSIZE 512 #define ADDR_COLUMN 1 #define ADDR_PAGE 2 #define ADDR_COLUMN_PAGE 3 #define NAND_ChipID_UNKNOWN 0x00 #define NAND_MAX_FLOORS 1 #define NAND_MAX_CHIPS 1 #define NAND_WAIT_READY(nand) NF_WaitRB() #define NAND_DISABLE_CE(nand) NF_SetCE(NFCE_HIGH) #define NAND_ENABLE_CE(nand) NF_SetCE(NFCE_LOW) #define WRITE_NAND_COMMAND(d, adr) NF_Cmd(d) #define WRITE_NAND_COMMANDW(d, adr) NF_CmdW(d) #define WRITE_NAND_ADDRESS(d, adr) NF_Addr(d) #define WRITE_NAND(d, adr) NF_Write(d) #define READ_NAND(adr) NF_Read() /* the following functions are NOP's because S3C24X0 handles this in hardware */ #define NAND_CTL_CLRALE(nandptr) #define NAND_CTL_SETALE(nandptr) #define NAND_CTL_CLRCLE(nandptr) #define NAND_CTL_SETCLE(nandptr) #define CONFIG_MTD_NAND_VERIFY_WRITE 1 #define CONFIG_MTD_NAND_ECC_JFFS2 1 #endif /* CONFIG_COMMANDS & CFG_CMD_NAND */ 在include/configs/smdk2410.h中下面命令定义部分将CFG_CMD_NAND开关放开。 /*********************************************************** * Command definition ***********************************************************/ #define CONFIG_COMMANDS \ (CONFIG_CMD_DFL | \ CFG_CMD_CACHE | \ /*CFG_CMD_NAND |*/ \ /*CFG_CMD_EEPROM |*/ \ /*CFG_CMD_I2C |*/ \ /*CFG_CMD_USB |*/ \ CFG_CMD_REGINFO | \ CFG_CMD_DATE | \ CFG_CMD_ELF) |
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