U-Boot移植
时间：2010-06-24 来源：liuyuanyang
U-Boot移植
U-Boot移植过程记录
一些提示： 1.交叉编译环境要事先搭建好 2.解释一下一段代码 smdk2400_config : unconfig @$(MKCONFIG) $(@:_config=) arm arm920t smdk2400 NULL s3c24x0 arm,就表示现在用的是 CPU 的架构是 arm 体系结构。 arm920t,指明这是 cpu 的内核类型,它对应于 cpu/arm920t 目录。 Smdk2410,这是开发板的型号,它的目录在 board/smdk2410 目录下。 NULL,表示开发者或者经销商是谁(vender) S3c24x0,表示开发板上的 cpu 是啥。
正文： 1.删除用不到的目录 根目录下的lib_文件夹，保留lib_arm ,lib_generic即可 cpu/目录下的文件夹，保留你要移植的目标平台即可(我这里是arm920t) board/目录下的文件夹，保留一个相似的板作模板(我这里是smdk2410)
2.修改最顶级的Makefile，添加自己的板子支持 a.按照2410的格式，自己新建一个：（这里命名为myboard,记住第二行之前一定是tab） smdk2410_config : unconfig @$(MKCONFIG) $(@:_config=) arm arm920t smdk2410 NULL s3c24x0
myboard_config : unconfig @$(MKCONFIG) $(@:_config=) arm arm920t myboard NULL s3c24x0 b.创建自己的开发板主目录
1.进入board目录，用smdk2410做模板，复制一份命名为myboard cd board cp -fr smdk2410 myboard 2.更改Makefile文件 大约在28行 COBJS := smdk2410.o flash.o 更改为COBJS := myboard.o flash.o ［否则make的时候会出现.depend找不到libmyboard.a的错误］ 3.更改文件名 mv board/myboard/smdk2410.c board/myboard/myboard.c mv include/configs/smdk2410.h include/configs/myboard.h 3.编译测试 1.make myboard_config 2.make 经过这两步，正常的话会在根目录下生成u-boot.bin文件，证明基础过程完成！
4.修改配置文件，使其符合自己的开发板。
一.U-BOOT板本为U-BOOT-1.1.6 二.新建开发板的目录 1.在board目录下将smdk2410复制为myboard目录 2.将board/myboard/smdk2410.c改名为myboard.c 3.将include/configs/smdk2410.h复制为myboard.h 4.修改顶层Makefile,添加: myboard_config : unconfig @$(MKCONFIG) $(@:_config=) arm arm920t myboard NULL s3c24x0 5.修改board/myboard/Makefile: COBJS := smdk2410.o flash.o 改为: COBJS := myboard.o flash.o 二.修改SDRAM的配置 1.根据HCLK设置SDRAM的刷新参数,主要是REFCNT寄存器,修改board/myboard/lowlevel_init.S #define REFCNT 1113 改为 #define REFCNT 0x4f4 /*period=7.8125us , HCLK=100MHZ, (2048+1-7.8125*100)*/ 三.修改board_init函数 1.修改board/myboard/myboard.c中的board_init函数,修改为: #define S3C2440_MPLL_400MHZ ((0x5c<<12) | (0x01<<4) | (0x01)) #define S3C2440_UPLL_48MHZ ((0x38<<12) | (0x02<<4) | (0x02)) #define S3C2440_CLKDIV 0x05 #define S3C2410_MPLL_220MHZ ((0x5c<<12) | (0x04<<4) | (0x00)) #define S3C2410_UPLL_48MHZ ((0x28<<12) | (0x01<<4) | (0x02)) #define S3C2410_CLKDIV 0x03 int board_init (void) { S3C24X0_CLOCK_POWER * const clk_power = S3C24X0_GetBase_CLOCK_POWER(); S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO(); /* set up the I/O ports */ gpio->GPACON = 0x007FFFFF; gpio->GPBCON = 0x00044555; gpio->GPBUP = 0x000007FF; gpio->GPCCON = 0xAAAAAAAA; gpio->GPCUP = 0x0000FFFF; gpio->GPDCON = 0xAAAAAAAA; gpio->GPDUP = 0x0000FFFF; gpio->GPECON = 0xAAAAAAAA; gpio->GPEUP = 0x0000FFFF; gpio->GPFCON = 0x000055AA; gpio->GPFUP = 0x000000FF; gpio->GPGCON = 0xFF95FFBA; gpio->GPGUP = 0x0000FFFF; gpio->GPHCON = 0x002AFAAA; gpio->GPHUP = 0x000007FF; if ((gpio->GSTATUS1 == 0x32410000) || (gpio->GSTATUS1 == 0x32410002) ) { } else { /* FCLK:HCLK:PCLK = 1:4:8 */ clk_power->CLKDIVN = S3C2440_CLKDIV; __asm__( "mrc p15,0,r1,c1,c0,0\n" "orr r1,r1,#0xc0000000\n" "mcr p15,0,r1,c1,c0,0\n" :::"r1" ); /* to reduce PLL lock time, adjust the LOCKTIME register */ clk_power->LOCKTIME = 0xFFFFFF; /* configure MPLL */ clk_power->MPLLCON = S3C2440_MPLL_400MHZ; /* some delay between MPLL and UPLL */ delay (4000); /* configure UPLL */ clk_power->UPLLCON = S3C2440_UPLL_48MHZ; /* some delay between MPLL and UPLL */ delay (8000); /* arch number of SMDK2410-Board */ gd->bd->bi_arch_number = MACH_TYPE_SMDK2440; } /* adress of boot parameters */ gd->bd->bi_boot_params = 0x30000100; icache_enable(); dcache_enable(); return 0; } 四.在/include/s3c24x0.h中加入2440 的CAMDIVN定义： typedef struct {
S3C24X0_REG32 LOCKTIME; S3C24X0_REG32 MPLLCON; S3C24X0_REG32 UPLLCON; S3C24X0_REG32 CLKCON; S3C24X0_REG32 CLKSLOW; S3C24X0_REG32 CLKDIVN; S3C24X0_REG32 CAMDIVN;
} S3C24X0_CLOCK_POWER; 五.修改cpu/arm920t/s3c24x0/speed.c,首先要在程序的开头增加如下一行,才可以使用gd变量: DECLARE_GLOBAL_DATA_PTR; #define S3C2440_CLKDIVN_PDIVN (1<<0) #define S3C2440_CLKDIVN_HDIVN_MASK (3<<1) #define S3C2440_CLKDIVN_HDIVN_1 (0<<1) #define S3C2440_CLKDIVN_HDIVN_2 (1<<1) #define S3C2440_CLKDIVN_HDIVN_4_8 (2<<1) #define S3C2440_CLKDIVN_HDIVN_3_6 (3<<1) #define S3C2440_CLKDIVN_UCLK (1<<3) #define S3C2440_CAMDIVN_CAMCLK_MASK (0xf<<0) #define S3C2440_CAMDIVN_CAMCLK_SEL (1<<4) #define S3C2440_CAMDIVN_HCLK3_HALF (1<<8) #define S3C2440_CAMDIVN_HCLK4_HALF (1<<9) #define S3C2440_CAMDIVN_DVSEN (1<<12) 1. 修改get_PLLCLK() DECLARE_GLOBAL_DATA_PTR; static ulong get_PLLCLK(int pllreg) { S3C24X0_CLOCK_POWER * const clk_power = S3C24X0_GetBase_CLOCK_POWER(); ulong r, m, p, s; if (pllreg == MPLL) r = clk_power->MPLLCON; else if (pllreg == UPLL) r = clk_power->UPLLCON; else hang(); m = ((r & 0xFF000) >> 12) + 8; p = ((r & 0x003F0) >> 4) + 2; s = r & 0x3; if(gd->bd->bi_arch_number == MACH_TYPE_SMDK2410) { return((CONFIG_SYS_CLK_FREQ * m) / (p << s)); } else { return ((CONFIG_SYS_CLK_FREQ*m*2) / (p<<s)) } } 2. 修改get_HCLK() /* return HCLK frequency */ ulong get_HCLK(void) { S3C24X0_CLOCK_POWER * const clk_power = S3C24X0_GetBase_CLOCK_POWER(); unsigned long clkdiv; unsigned long camdiv; int hdiv = 1; if (gd->bd->bi_arch_number == MACH_TYPE_SMDK2410) return((clk_power->CLKDIVN & 0x2) ? get_FCLK()/2 : get_FCLK()); else { clkdiv = clk_power->CLKDIVN; camdiv = clk_power->CAMDIVN; switch(clkdiv & S3C2440_CLKDIVN_HDIVN_MASK) { case S3C2440_CLKDIVN_HDIVN_1: hdiv = 1; break; case S3C2440_CLKDIVN_HDIVN_2: hdiv = 2; break; case S3C2440_CLKDIVN_HDIVN_4_8: hdiv = (camdiv & S3C2440_CAMDIVN_HCLK4_HALF) ? 8 : 4; break; case S3C2440_CLKDIVN_HDIVN_3_6: hdiv = (camdiv & S3C2440_CAMDIVN_HCLK3_HALF) ? 6 : 3; break; } return get_FCLK() / hdiv; } } 3. 修改get_PCLK() /* return PCLK frequency */ ulong get_PCLK(void) { S3C24X0_CLOCK_POWER * const clk_power = S3C24X0_GetBase_CLOCK_POWER(); unsigned long clkdiv; unsigned long camdiv; int hdiv = 1; if (gd->bd->bi_arch_number == MACH_TYPE_SMDK2410) return((clk_power->CLKDIVN & 0x1) ? get_HCLK()/2 : get_HCLK()); else { clkdiv = clk_power->CLKDIVN; camdiv = clk_power->CAMDIVN; switch(clkdiv & S3C2440_CLKDIVN_HDIVN_MASK) { case S3C2440_CLKDIVN_HDIVN_1: hdiv = 1; break; case S3C2440_CLKDIVN_HDIVN_2: hdiv = 2; break; case S3C2440_CLKDIVN_HDIVN_4_8: hdiv = (camdiv & S3C2440_CAMDIVN_HCLK4_HALF) ? 8 : 4; break; case S3C2440_CLKDIVN_HDIVN_3_6: hdiv = (camdiv & S3C2440_CAMDIVN_HCLK3_HALF) ? 6 : 3; break; } return get_FCLK() / hdiv / ((clkdiv & S3C2440_CLKDIVN_PDIVN) ? 2 : 1); } } 六.选择 NOR FLASH 型号 1.修改include/configs/myboard.h 把型号改成开发板中的NOR flash型号 AM29LV800 #if 0 #define CONFIG_AMD_LV400 1 /* uncomment this if you have a LV400 flash */ #endif #define CONFIG_AMD_LV800 1 /* uncomment this if you have a LV800 flash */ 重新编译 七.配置include/configs/myboard.h中定义CS8900的各个默认地址,如IP,MAC等 #define CONFIG_ETHADDR 08:00:3e:26:0a:5b #define CONFIG_NETMASK 255.255.255.0 #define CONFIG_IPADDR 192.168.1.8 #define CONFIG_SERVERIP 192.168.1.15 八.添加include/configs/myboard.h #define CONFIG_SETUP_MEMORY_TAGS 1 #define CONFIG_CMD_LINE_TAG 1 #define CONFIG_BOOTDELAY 3 #define CONFIG_BOOTARGS "noinitrd console=ttSAC0 root=/dev/mtdblock1 rootfstype=jffs2" #define CONFIG_BOOTCOMMAND "nboot 0x32000000 0 0; bootm 0x32000000" 九.添加PING命令 修改include/configs/myboard.h: #define CONFIG_COMMANDS \ (CONFIG_CMD_DFL | \ CFG_CMD_CACHE | \ CFG_CMD_PING | \ CFG_CMD_REGINFO | \ CFG_CMD_DATE | \ CFG_CMD_ELF) 十.修改提示符 修改include/configs/myboard.h: #define CFG_PROMPT "myboard> " /* Monitor Command Prompt */ 十一.支持NAND FLASH 1. 修改配置文件include/configs/myboard.h的宏定义 #define CONFIG_COMMANDS \ (CONFIG_CMD_DFL | \ CFG_CMD_CACHE | \ CFG_CMD_PING | \ CFG_CMD_NAND | \ /*CFG_CMD_EEPROM |*/ \ /*CFG_CMD_I2C |*/ \ /*CFG_CMD_USB |*/ \ CFG_CMD_REGINFO | \ CFG_CMD_DATE | \ CFG_CMD_ELF) 2. 在include/configs/myboard.h中添加三个跟NAND 有关的宏定义 #define CFG_NAND_BASE 0 #define CFG_MAX_NAND_DEVICE 1 #define NAND_MAX_CHIPS 1 3. 在include/s3c24x0.h中添加S3C2440_NAND数据结构 /* NAND FLASH (see S3C2440 manual chapter 6) */ typedef struct { S3C24X0_REG32 NFCONF; S3C24X0_REG32 NFCONT; S3C24X0_REG32 NFCMD; S3C24X0_REG32 NFADDR; S3C24X0_REG32 NFDATA; S3C24X0_REG32 NFMECCD0; S3C24X0_REG32 NFMECCD1; S3C24X0_REG32 NFSECCD; S3C24X0_REG32 NFSTAT; S3C24X0_REG32 NFESTAT0; S3C24X0_REG32 NFESTAT1; S3C24X0_REG32 NFMECC0; S3C24X0_REG32 NFMECC1; S3C24X0_REG32 NFSECC; S3C24X0_REG32 NFSBLK; S3C24X0_REG32 NFEBLK; } /*__attribute__((__packed__))*/ S3C2440_NAND; 4. 在include/s3c2410.h文件中仿照S3C2410_GetBase_NAND函数定义S3C2440_GetBase_NAND函数 static inline S3C2440_NAND * const S3C2440_GetBase_NAND(void) { return (S3C2440_NAND * const)S3C2410_NAND_BASE; } 5.新建cpu/arm920t/s3c24x0/nand_flash.c #include<common.h> #if (CONFIG_COMMANDS & CFG_CMD_NAND) && !defined(CFG_NAND_LEGACY) #include<s3c2410.h> #include<nand.h> DECLARE_GLOBAL_DATA_PTR; #define S3C2440_NFSTAT_READY (1<<0) #define S3C2440_NFCONT_nFCE (1<<1) static void s3c2440_nand_select_chip(struct mtd_info *mtd, int chip) { S3C2440_NAND *const s3c2440nand = S3C2440_GetBase_NAND(); if(chip == -1) { s3c2440nand->NFCONT |= S3C2440_NFCONT_nFCE; } else { s3c2440nand->NFCONT &= ~S3C2440_NFCONT_nFCE; } } static void s3c2440_nand_hwcontrol(struct mtd_info *mtd, int cmd) { S3C2440_NAND *const s3c2440nand = S3C2440_GetBase_NAND(); struct nand_chip *chip = mtd->priv; switch (cmd) { case NAND_CTL_SETNCE: case NAND_CTL_CLRNCE: printf("%s: called for NCE\n", __FUNCTION__); break; case NAND_CTL_SETCLE: chip->IO_ADDR_W = (void *) &s3c2440nand->NFCMD; break; case NAND_CTL_SETALE: chip->IO_ADDR_W = (void *) &s3c2440nand->NFADDR; break; default: chip->IO_ADDR_W = (void *) &s3c2440nand->NFDATA; break; } } static int s3c2440_nand_devready(struct mtd_info *mtd) { S3C2440_NAND *const s3c2440nand = S3C2440_GetBase_NAND(); return (s3c2440nand->NFSTAT & S3C2440_NFSTAT_READY); } static void s3c24x0_nand_inithw(void) { S3C2440_NAND *const s3c2440nand = S3C2440_GetBase_NAND(); #define TACLS 0 #define TWRPH0 4 #define TWRPH1 2 s3c2440nand->NFCONF = (TACLS<<12) | (TWRPH0<<8) | (TWRPH1<<4); s3c2440nand->NFCONT = (1<<4) | (0<<1) | (1<<0); } void board_nand_init(struct nand_chip *chip) { S3C2440_NAND * const s3c2440nand = S3C2440_GetBase_NAND(); s3c24x0_nand_inithw(); chip->IO_ADDR_R = (void *)&s3c2440nand->NFDATA; chip->IO_ADDR_W = (void *)&s3c2440nand->NFDATA; chip->hwcontrol = s3c2440_nand_hwcontrol; chip->dev_ready = s3c2440_nand_devready; chip->select_chip = s3c2440_nand_select_chip; chip->options = 0; chip->eccmode = NAND_ECC_SOFT; } #endif 6.修改cpu/arm920t/s3c24x0/Makefile: COBJS = i2c.o interrupts.o serial.o speed.o \ usb_ohci.o nand_flash.o 十二.修改完,已经可以编译U-BOOT Make myboard_config Make all 生成u-boot.bin,用HJTAG下载到板上运行 八.测试网络 1.把开发板连上网络 2.配置开发板的IP地址: SMDK2410 # setenv ipaddr 192.168.6.239 SMDK2410 # setenv ethaddr 08:00:3e:26:0a:5b SMDK2410 # setenv serverip 192.168.6.15 SMDK2410 # saveenv 3.打开电脑的tftp-server tftp 0x30000000 u-boot.bin 4. 烧写U-BOOT SMDK2410 # protect off all SMDK2410 # erase all SMDK2410 # tftp 0x30000000 u-boot.bin SMDK2410 # cp.b 0x30000000 0x0 0x1ffff SMDK2410 # protect on all
U-Boot移植过程记录
一些提示： 1.交叉编译环境要事先搭建好 2.解释一下一段代码 smdk2400_config : unconfig @$(MKCONFIG) $(@:_config=) arm arm920t smdk2400 NULL s3c24x0 arm,就表示现在用的是 CPU 的架构是 arm 体系结构。 arm920t,指明这是 cpu 的内核类型,它对应于 cpu/arm920t 目录。 Smdk2410,这是开发板的型号,它的目录在 board/smdk2410 目录下。 NULL,表示开发者或者经销商是谁(vender) S3c24x0,表示开发板上的 cpu 是啥。
正文： 1.删除用不到的目录 根目录下的lib_文件夹，保留lib_arm ,lib_generic即可 cpu/目录下的文件夹，保留你要移植的目标平台即可(我这里是arm920t) board/目录下的文件夹，保留一个相似的板作模板(我这里是smdk2410)
2.修改最顶级的Makefile，添加自己的板子支持 a.按照2410的格式，自己新建一个：（这里命名为myboard,记住第二行之前一定是tab） smdk2410_config : unconfig @$(MKCONFIG) $(@:_config=) arm arm920t smdk2410 NULL s3c24x0
myboard_config : unconfig @$(MKCONFIG) $(@:_config=) arm arm920t myboard NULL s3c24x0 b.创建自己的开发板主目录
1.进入board目录，用smdk2410做模板，复制一份命名为myboard cd board cp -fr smdk2410 myboard 2.更改Makefile文件 大约在28行 COBJS := smdk2410.o flash.o 更改为COBJS := myboard.o flash.o ［否则make的时候会出现.depend找不到libmyboard.a的错误］ 3.更改文件名 mv board/myboard/smdk2410.c board/myboard/myboard.c mv include/configs/smdk2410.h include/configs/myboard.h 3.编译测试 1.make myboard_config 2.make 经过这两步，正常的话会在根目录下生成u-boot.bin文件，证明基础过程完成！
4.修改配置文件，使其符合自己的开发板。
一.U-BOOT板本为U-BOOT-1.1.6 二.新建开发板的目录 1.在board目录下将smdk2410复制为myboard目录 2.将board/myboard/smdk2410.c改名为myboard.c 3.将include/configs/smdk2410.h复制为myboard.h 4.修改顶层Makefile,添加: myboard_config : unconfig @$(MKCONFIG) $(@:_config=) arm arm920t myboard NULL s3c24x0 5.修改board/myboard/Makefile: COBJS := smdk2410.o flash.o 改为: COBJS := myboard.o flash.o 二.修改SDRAM的配置 1.根据HCLK设置SDRAM的刷新参数,主要是REFCNT寄存器,修改board/myboard/lowlevel_init.S #define REFCNT 1113 改为 #define REFCNT 0x4f4 /*period=7.8125us , HCLK=100MHZ, (2048+1-7.8125*100)*/ 三.修改board_init函数 1.修改board/myboard/myboard.c中的board_init函数,修改为: #define S3C2440_MPLL_400MHZ ((0x5c<<12) | (0x01<<4) | (0x01)) #define S3C2440_UPLL_48MHZ ((0x38<<12) | (0x02<<4) | (0x02)) #define S3C2440_CLKDIV 0x05 #define S3C2410_MPLL_220MHZ ((0x5c<<12) | (0x04<<4) | (0x00)) #define S3C2410_UPLL_48MHZ ((0x28<<12) | (0x01<<4) | (0x02)) #define S3C2410_CLKDIV 0x03 int board_init (void) { S3C24X0_CLOCK_POWER * const clk_power = S3C24X0_GetBase_CLOCK_POWER(); S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO(); /* set up the I/O ports */ gpio->GPACON = 0x007FFFFF; gpio->GPBCON = 0x00044555; gpio->GPBUP = 0x000007FF; gpio->GPCCON = 0xAAAAAAAA; gpio->GPCUP = 0x0000FFFF; gpio->GPDCON = 0xAAAAAAAA; gpio->GPDUP = 0x0000FFFF; gpio->GPECON = 0xAAAAAAAA; gpio->GPEUP = 0x0000FFFF; gpio->GPFCON = 0x000055AA; gpio->GPFUP = 0x000000FF; gpio->GPGCON = 0xFF95FFBA; gpio->GPGUP = 0x0000FFFF; gpio->GPHCON = 0x002AFAAA; gpio->GPHUP = 0x000007FF; if ((gpio->GSTATUS1 == 0x32410000) || (gpio->GSTATUS1 == 0x32410002) ) { } else { /* FCLK:HCLK:PCLK = 1:4:8 */ clk_power->CLKDIVN = S3C2440_CLKDIV; __asm__( "mrc p15,0,r1,c1,c0,0\n" "orr r1,r1,#0xc0000000\n" "mcr p15,0,r1,c1,c0,0\n" :::"r1" ); /* to reduce PLL lock time, adjust the LOCKTIME register */ clk_power->LOCKTIME = 0xFFFFFF; /* configure MPLL */ clk_power->MPLLCON = S3C2440_MPLL_400MHZ; /* some delay between MPLL and UPLL */ delay (4000); /* configure UPLL */ clk_power->UPLLCON = S3C2440_UPLL_48MHZ; /* some delay between MPLL and UPLL */ delay (8000); /* arch number of SMDK2410-Board */ gd->bd->bi_arch_number = MACH_TYPE_SMDK2440; } /* adress of boot parameters */ gd->bd->bi_boot_params = 0x30000100; icache_enable(); dcache_enable(); return 0; } 四.在/include/s3c24x0.h中加入2440 的CAMDIVN定义： typedef struct {
S3C24X0_REG32 LOCKTIME; S3C24X0_REG32 MPLLCON; S3C24X0_REG32 UPLLCON; S3C24X0_REG32 CLKCON; S3C24X0_REG32 CLKSLOW; S3C24X0_REG32 CLKDIVN; S3C24X0_REG32 CAMDIVN;
} S3C24X0_CLOCK_POWER; 五.修改cpu/arm920t/s3c24x0/speed.c,首先要在程序的开头增加如下一行,才可以使用gd变量: DECLARE_GLOBAL_DATA_PTR; #define S3C2440_CLKDIVN_PDIVN (1<<0) #define S3C2440_CLKDIVN_HDIVN_MASK (3<<1) #define S3C2440_CLKDIVN_HDIVN_1 (0<<1) #define S3C2440_CLKDIVN_HDIVN_2 (1<<1) #define S3C2440_CLKDIVN_HDIVN_4_8 (2<<1) #define S3C2440_CLKDIVN_HDIVN_3_6 (3<<1) #define S3C2440_CLKDIVN_UCLK (1<<3) #define S3C2440_CAMDIVN_CAMCLK_MASK (0xf<<0) #define S3C2440_CAMDIVN_CAMCLK_SEL (1<<4) #define S3C2440_CAMDIVN_HCLK3_HALF (1<<8) #define S3C2440_CAMDIVN_HCLK4_HALF (1<<9) #define S3C2440_CAMDIVN_DVSEN (1<<12) 1. 修改get_PLLCLK() DECLARE_GLOBAL_DATA_PTR; static ulong get_PLLCLK(int pllreg) { S3C24X0_CLOCK_POWER * const clk_power = S3C24X0_GetBase_CLOCK_POWER(); ulong r, m, p, s; if (pllreg == MPLL) r = clk_power->MPLLCON; else if (pllreg == UPLL) r = clk_power->UPLLCON; else hang(); m = ((r & 0xFF000) >> 12) + 8; p = ((r & 0x003F0) >> 4) + 2; s = r & 0x3; if(gd->bd->bi_arch_number == MACH_TYPE_SMDK2410) { return((CONFIG_SYS_CLK_FREQ * m) / (p << s)); } else { return ((CONFIG_SYS_CLK_FREQ*m*2) / (p<<s)) } } 2. 修改get_HCLK() /* return HCLK frequency */ ulong get_HCLK(void) { S3C24X0_CLOCK_POWER * const clk_power = S3C24X0_GetBase_CLOCK_POWER(); unsigned long clkdiv; unsigned long camdiv; int hdiv = 1; if (gd->bd->bi_arch_number == MACH_TYPE_SMDK2410) return((clk_power->CLKDIVN & 0x2) ? get_FCLK()/2 : get_FCLK()); else { clkdiv = clk_power->CLKDIVN; camdiv = clk_power->CAMDIVN; switch(clkdiv & S3C2440_CLKDIVN_HDIVN_MASK) { case S3C2440_CLKDIVN_HDIVN_1: hdiv = 1; break; case S3C2440_CLKDIVN_HDIVN_2: hdiv = 2; break; case S3C2440_CLKDIVN_HDIVN_4_8: hdiv = (camdiv & S3C2440_CAMDIVN_HCLK4_HALF) ? 8 : 4; break; case S3C2440_CLKDIVN_HDIVN_3_6: hdiv = (camdiv & S3C2440_CAMDIVN_HCLK3_HALF) ? 6 : 3; break; } return get_FCLK() / hdiv; } } 3. 修改get_PCLK() /* return PCLK frequency */ ulong get_PCLK(void) { S3C24X0_CLOCK_POWER * const clk_power = S3C24X0_GetBase_CLOCK_POWER(); unsigned long clkdiv; unsigned long camdiv; int hdiv = 1; if (gd->bd->bi_arch_number == MACH_TYPE_SMDK2410) return((clk_power->CLKDIVN & 0x1) ? get_HCLK()/2 : get_HCLK()); else { clkdiv = clk_power->CLKDIVN; camdiv = clk_power->CAMDIVN; switch(clkdiv & S3C2440_CLKDIVN_HDIVN_MASK) { case S3C2440_CLKDIVN_HDIVN_1: hdiv = 1; break; case S3C2440_CLKDIVN_HDIVN_2: hdiv = 2; break; case S3C2440_CLKDIVN_HDIVN_4_8: hdiv = (camdiv & S3C2440_CAMDIVN_HCLK4_HALF) ? 8 : 4; break; case S3C2440_CLKDIVN_HDIVN_3_6: hdiv = (camdiv & S3C2440_CAMDIVN_HCLK3_HALF) ? 6 : 3; break; } return get_FCLK() / hdiv / ((clkdiv & S3C2440_CLKDIVN_PDIVN) ? 2 : 1); } } 六.选择 NOR FLASH 型号 1.修改include/configs/myboard.h 把型号改成开发板中的NOR flash型号 AM29LV800 #if 0 #define CONFIG_AMD_LV400 1 /* uncomment this if you have a LV400 flash */ #endif #define CONFIG_AMD_LV800 1 /* uncomment this if you have a LV800 flash */ 重新编译 七.配置include/configs/myboard.h中定义CS8900的各个默认地址,如IP,MAC等 #define CONFIG_ETHADDR 08:00:3e:26:0a:5b #define CONFIG_NETMASK 255.255.255.0 #define CONFIG_IPADDR 192.168.1.8 #define CONFIG_SERVERIP 192.168.1.15 八.添加include/configs/myboard.h #define CONFIG_SETUP_MEMORY_TAGS 1 #define CONFIG_CMD_LINE_TAG 1 #define CONFIG_BOOTDELAY 3 #define CONFIG_BOOTARGS "noinitrd console=ttSAC0 root=/dev/mtdblock1 rootfstype=jffs2" #define CONFIG_BOOTCOMMAND "nboot 0x32000000 0 0; bootm 0x32000000" 九.添加PING命令 修改include/configs/myboard.h: #define CONFIG_COMMANDS \ (CONFIG_CMD_DFL | \ CFG_CMD_CACHE | \ CFG_CMD_PING | \ CFG_CMD_REGINFO | \ CFG_CMD_DATE | \ CFG_CMD_ELF) 十.修改提示符 修改include/configs/myboard.h: #define CFG_PROMPT "myboard> " /* Monitor Command Prompt */ 十一.支持NAND FLASH 1. 修改配置文件include/configs/myboard.h的宏定义 #define CONFIG_COMMANDS \ (CONFIG_CMD_DFL | \ CFG_CMD_CACHE | \ CFG_CMD_PING | \ CFG_CMD_NAND | \ /*CFG_CMD_EEPROM |*/ \ /*CFG_CMD_I2C |*/ \ /*CFG_CMD_USB |*/ \ CFG_CMD_REGINFO | \ CFG_CMD_DATE | \ CFG_CMD_ELF) 2. 在include/configs/myboard.h中添加三个跟NAND 有关的宏定义 #define CFG_NAND_BASE 0 #define CFG_MAX_NAND_DEVICE 1 #define NAND_MAX_CHIPS 1 3. 在include/s3c24x0.h中添加S3C2440_NAND数据结构 /* NAND FLASH (see S3C2440 manual chapter 6) */ typedef struct { S3C24X0_REG32 NFCONF; S3C24X0_REG32 NFCONT; S3C24X0_REG32 NFCMD; S3C24X0_REG32 NFADDR; S3C24X0_REG32 NFDATA; S3C24X0_REG32 NFMECCD0; S3C24X0_REG32 NFMECCD1; S3C24X0_REG32 NFSECCD; S3C24X0_REG32 NFSTAT; S3C24X0_REG32 NFESTAT0; S3C24X0_REG32 NFESTAT1; S3C24X0_REG32 NFMECC0; S3C24X0_REG32 NFMECC1; S3C24X0_REG32 NFSECC; S3C24X0_REG32 NFSBLK; S3C24X0_REG32 NFEBLK; } /*__attribute__((__packed__))*/ S3C2440_NAND; 4. 在include/s3c2410.h文件中仿照S3C2410_GetBase_NAND函数定义S3C2440_GetBase_NAND函数 static inline S3C2440_NAND * const S3C2440_GetBase_NAND(void) { return (S3C2440_NAND * const)S3C2410_NAND_BASE; } 5.新建cpu/arm920t/s3c24x0/nand_flash.c #include<common.h> #if (CONFIG_COMMANDS & CFG_CMD_NAND) && !defined(CFG_NAND_LEGACY) #include<s3c2410.h> #include<nand.h> DECLARE_GLOBAL_DATA_PTR; #define S3C2440_NFSTAT_READY (1<<0) #define S3C2440_NFCONT_nFCE (1<<1) static void s3c2440_nand_select_chip(struct mtd_info *mtd, int chip) { S3C2440_NAND *const s3c2440nand = S3C2440_GetBase_NAND(); if(chip == -1) { s3c2440nand->NFCONT |= S3C2440_NFCONT_nFCE; } else { s3c2440nand->NFCONT &= ~S3C2440_NFCONT_nFCE; } } static void s3c2440_nand_hwcontrol(struct mtd_info *mtd, int cmd) { S3C2440_NAND *const s3c2440nand = S3C2440_GetBase_NAND(); struct nand_chip *chip = mtd->priv; switch (cmd) { case NAND_CTL_SETNCE: case NAND_CTL_CLRNCE: printf("%s: called for NCE\n", __FUNCTION__); break; case NAND_CTL_SETCLE: chip->IO_ADDR_W = (void *) &s3c2440nand->NFCMD; break; case NAND_CTL_SETALE: chip->IO_ADDR_W = (void *) &s3c2440nand->NFADDR; break; default: chip->IO_ADDR_W = (void *) &s3c2440nand->NFDATA; break; } } static int s3c2440_nand_devready(struct mtd_info *mtd) { S3C2440_NAND *const s3c2440nand = S3C2440_GetBase_NAND(); return (s3c2440nand->NFSTAT & S3C2440_NFSTAT_READY); } static void s3c24x0_nand_inithw(void) { S3C2440_NAND *const s3c2440nand = S3C2440_GetBase_NAND(); #define TACLS 0 #define TWRPH0 4 #define TWRPH1 2 s3c2440nand->NFCONF = (TACLS<<12) | (TWRPH0<<8) | (TWRPH1<<4); s3c2440nand->NFCONT = (1<<4) | (0<<1) | (1<<0); } void board_nand_init(struct nand_chip *chip) { S3C2440_NAND * const s3c2440nand = S3C2440_GetBase_NAND(); s3c24x0_nand_inithw(); chip->IO_ADDR_R = (void *)&s3c2440nand->NFDATA; chip->IO_ADDR_W = (void *)&s3c2440nand->NFDATA; chip->hwcontrol = s3c2440_nand_hwcontrol; chip->dev_ready = s3c2440_nand_devready; chip->select_chip = s3c2440_nand_select_chip; chip->options = 0; chip->eccmode = NAND_ECC_SOFT; } #endif 6.修改cpu/arm920t/s3c24x0/Makefile: COBJS = i2c.o interrupts.o serial.o speed.o \ usb_ohci.o nand_flash.o 十二.修改完,已经可以编译U-BOOT Make myboard_config Make all 生成u-boot.bin,用HJTAG下载到板上运行 八.测试网络 1.把开发板连上网络 2.配置开发板的IP地址: SMDK2410 # setenv ipaddr 192.168.6.239 SMDK2410 # setenv ethaddr 08:00:3e:26:0a:5b SMDK2410 # setenv serverip 192.168.6.15 SMDK2410 # saveenv 3.打开电脑的tftp-server tftp 0x30000000 u-boot.bin 4. 烧写U-BOOT SMDK2410 # protect off all SMDK2410 # erase all SMDK2410 # tftp 0x30000000 u-boot.bin SMDK2410 # cp.b 0x30000000 0x0 0x1ffff SMDK2410 # protect on all
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