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U-boot(七):U-boot移植

2026/8/12 22:35:13 拓冰建站 浏览量
U-boot(七):U-boot移植

        本文主要探讨基于210官方U-boot源码移植。

移植基础

tar -jxvf android_uboot_smdkv210.tar.bz2cd u-boot-samsung-devrm -rf onenand_ipl onenand_bl1 lib_avr32 lib_blackfin lib_i386 lib_m68k lib_mips lib_microblaze lib_nios lib_nios2 lib_ppc lib_sh lib_sparccd boardls|grep  -v 'samsung'|xargs -I {}  rm -rf {}cd samsungls|grep smdk|grep -v '110'|xargs -I {}  rm -rf {}cd u-boot-samsung-dev/cpuls |grep -v 's5pc11x'|xargs -I {}  rm -rf {}cd ../includerm -rf asm-avr32、asm-blackfin、asm-i386、asm-m68k、asm-sh、asm-microblaze、asm-mips、asm-nios、asm-nios2、asm-ppc、asm-sparccd asm-arm ls|grep 'arch-'|grep -v 's5pc11x'|xargs -I {}  rm -rf {}cd include/configsls |grep -v 'smdkv210'|xargs -I {}  rm -rf {}cd u-boot-samsung-devvim mk#!/bin/shmake distcleanmake smdkv210single_configmake -j4chmod +x mkvim MakfileCROSS_COMPILE = /root/arm-2009q3/bin/arm-none-linux-gnueabi-make smdkv210single_config ==>  include/configs/smdkv210single.h./mk

        uboot移植异常,供电锁存正常,串口异常,分析low_level_init.S得到210的uboot无使用PMIC,注释PMIC初始化，编译移植

/* init PMIC chip */
//not use PMIC in 210 uboot
//bl PMIC_InitIp

编译移植结果：

修改行提示符(smdkv210single.h)

//#define CFG_PROMPT              "SMDKV210 # "   /* Monitor Command Prompt       */
#define CFG_PROMPT              "root # "   /* Monitor Command Prompt       */

修改uboot串口(默认串口2,无需修改,smdkv210single.h)

#define CONFIG_SERIAL3          1       /* we use UART2 on SMDKC110 */

        s5pv110.h依据smdkv210single.h中的串口宏开关,定义出串口2配置寄存器基地址,再依据偏移地址定义初始化串口配置

#if defined(CONFIG_SERIAL1)
#define ELFIN_UART_CONSOLE_BASE (ELFIN_UART_BASE + ELFIN_UART0_OFFSET)
#elif defined(CONFIG_SERIAL2)
#define ELFIN_UART_CONSOLE_BASE (ELFIN_UART_BASE + ELFIN_UART1_OFFSET)
#elif defined(CONFIG_SERIAL3)
#define ELFIN_UART_CONSOLE_BASE (ELFIN_UART_BASE + ELFIN_UART2_OFFSET)
#elif defined(CONFIG_SERIAL4)
#define ELFIN_UART_CONSOLE_BASE (ELFIN_UART_BASE + ELFIN_UART3_OFFSET)
#else
#define ELFIN_UART_CONSOLE_BASE (ELFIN_UART_BASE + ELFIN_UART0_OFFSET)
#endif

 修改默认网络配置(smdkv210single.h)

/*#define CONFIG_BOOTARGS       "root=ramfs devfs=mount console=ttySA0,9600" */
#define CONFIG_ETHADDR          00:40:5c:26:0a:5b
#define CONFIG_NETMASK          255.255.255.0
#define CONFIG_IPADDR           192.168.100.27
#define CONFIG_SERVERIP         192.168.100.100
#define CONFIG_GATEWAYIP        192.168.100.1

        iNand已有环境变量则需清除,重启后才会首先使用代码中的环境变量
        

uboot:mmc write 0 30000000 11# 32

        将DDR的0x30000000开头一段内存内容写入iNand的17扇区开始的32个扇区内(写入长度16KB)

DDR移植


        DDR时钟

                lowlevel_init.S中system_clock_init函数依据smdkv210single.h的宏开关对所有时钟做初始化(包含DDR,DDR时钟宏开关)

smdkv210single.h/*-----------------------------------------------------------------------* Stack sizes** The stack sizes are set up in start.S using the settings below*/
#define CONFIG_STACKSIZE    0x40000        /* regular stack 256KB */
#ifdef CONFIG_USE_IRQ
#define CONFIG_STACKSIZE_IRQ    (4*1024)    /* IRQ stack */
#define CONFIG_STACKSIZE_FIQ    (4*1024)    /* FIQ stack */
#endif//#define CONFIG_CLK_667_166_166_133
//#define CONFIG_CLK_533_133_100_100
//#define CONFIG_CLK_800_200_166_133
//#define CONFIG_CLK_800_100_166_133
#define CONFIG_CLK_1000_200_166_133
//#define CONFIG_CLK_400_200_166_133
//#define CONFIG_CLK_400_100_166_133


        DDR配置

DRAM:     1 GBDRAM bank   = 0x00000000
-> start    = 0x20000000
-> size     = 0x20000000
DRAM bank   = 0x00000001
-> start    = 0x40000000
-> size     = 0x20000000DRAM大小和DRAM bank 0/1 的起始地址和大小有误,修改显示为:DRAM:     512MBDRAM bank   = 0x00000000
-> start    = 0x30000000
-> size     = 0x10000000
DRAM bank   = 0x00000001
-> start    = 0x40000000
-> size     = 0x10000000


                修改DMC起始地址和大小(smdkv210single.h)

#define MEMORY_BASE_ADDRESS     0x30000000
#define CONFIG_NR_DRAM_BANKS    2          /* we have 2 bank of DRAM */
//#define SDRAM_BANK_SIZE       0x20000000    /* 512 MB */
#define SDRAM_BANK_SIZE         0x10000000    /* 256 MB */
#define PHYS_SDRAM_1            MEMORY_BASE_ADDRESS /* SDRAM Bank #1 */
#define PHYS_SDRAM_1_SIZE       SDRAM_BANK_SIZE
//#define PHYS_SDRAM_2          (MEMORY_BASE_ADDRESS + SDRAM_BANK_SIZE) /* SDRAM Bank #2 */
#define PHYS_SDRAM_2            0x40000000 /* SDRAM Bank #2 */
#define PHYS_SDRAM_2_SIZE       SDRAM_BANK_SIZE

                        DMC0的起始地址修改需修改寄存器配置

#if defined(CONFIG_MCP_SINGLE)//#define DMC0_MEMCONFIG_0      0x20E01323      // MemConfig0   256MB config, 8 banks,Mapping Method[12:15]0:linear, 1:linterleaved, 2:Mixed
#define DMC0_MEMCONFIG_0        0x30F01323      // MemConfig0   256MB config, 8 banks,Mapping Method[12:15]0:linear, 1:linterleaved, 2:Mixed
#define DMC0_MEMCONFIG_1        0x40F01323      // MemConfig1
#define DMC0_TIMINGA_REF        0x00000618      // TimingAref   7.8us*133MHz=1038(0x40E), 100MHz=780(0x30C), 20MHz=156(0x9C), 10MHz=78(0x4E)
#define DMC0_TIMING_ROW         0x28233287      // TimingRow    for @200MHz
#define DMC0_TIMING_DATA        0x23240304      // TimingData   CL=3
#define DMC0_TIMING_PWR         0x09C80232      // TimingPower#define DMC1_MEMCONTROL         0x00202400      // MemControl   BL=4, 2 chip, DDR2 type, dynamic self refresh, force precharge, dynamic power down off
#define DMC1_MEMCONFIG_0        0x40C01323      // MemConfig0   512MB config, 8 banks,Mapping Method[12:15]0:linear, 1:linterleaved, 2:Mixed
#define DMC1_MEMCONFIG_1        0x00E01323      // MemConfig1
#define DMC1_TIMINGA_REF        0x00000618      // TimingAref   7.8us*133MHz=1038(0x40E), 100MHz=780(0x30C), 20MHz=156(0x9C), 10MHz=78(0x4
#define DMC1_TIMING_ROW         0x28233289      // TimingRow    for @200MHz
#define DMC1_TIMING_DATA        0x23240304      // TimingData   CL=3
#define DMC1_TIMING_PWR         0x08280232      // TimingPower


        修改MMU内存映射

                210的uboot做了MMU映射，故修改完DMC0的起始地址需要修改它对应的地址映射

修改(start.S): //.set __base,0x200.set __base,0x300// 256MB for SDRAM with cacheable依据(start.S):/* Set the TTB register */ldr    r0, _mmu_table_baseldr    r1, =CFG_PHY_UBOOT_BASEldr    r2, =0xfff00000bic    r0, r0, r2orr    r1, r0, r1mcr    p15, 0, r1, c2, c0, 0
修改(smdkc110.c):#ifdef CONFIG_MCP_SINGLE
ulong virt_to_phy_smdkc110(ulong addr)
{if ((0xc0000000 <= addr) && (addr < 0xd0000000))//return (addr - 0xc0000000 + 0x20000000);return (addr - 0xc0000000 + 0x30000000);elseprintf("The input address don't need "\"a virtual-to-physical translation : %08lx\n", addr);return addr;
}
#else
ulong virt_to_phy_smdkc110(ulong addr)
{if ((0xc0000000 <= addr) && (addr < 0xd0000000))return (addr - 0xc0000000 + 0x30000000);else if ((0x30000000 <= addr) && (addr < 0x50000000))return addr;elseprintf("The input address don't need "\"a virtual-to-physical translation : %08lx\n", addr);return addr;
}
#endif依据(smdkv210single.h):#define CONFIG_ENABLE_MMU#ifdef CONFIG_ENABLE_MMU#define virt_to_phys(x)    virt_to_phy_smdkc110(x)#else#define virt_to_phys(x)    (x)#endif

        其他异常

SD/MMC:  unrecognised EXT_CSD structure version 7
unrecognised EXT_CSD structure version 7
Card init fail!修改SD/MMC的大小，显示为SD/MMC:  3776MB


                该异常是由于mmc驱动代码不支持该版本号的inand，修改mmc.c中对SD/mmc版本号的判别（inand为高版本sd卡）

  ext_csd_struct = ext_csd[EXT_CSD_REV];//if (ext_csd_struct > 5) {if (ext_csd_struct > 8) {printf("unrecognised EXT_CSD structure ""version %d\n", ext_csd_struct);err = -1;goto out;}

网卡驱动移植

        DM9000基础

        SoC的SROM bank和网卡芯片的CS引脚连接,主机SoC访问SROM bank地址来访问网卡芯片内部寄存器
        网卡芯片内部寄存器使用相对地址访问,从00开始网卡芯片寄存器地址：SROM bank起始地址+网卡芯片内部寄存器相对地址
        主机SoC访问网卡芯片是总线式访问(IO与内存统一编址),无内置网卡控制器而Nand/SD接口需要时序来访问
        210的SROM控制器是8/16bit接口,实际使用16位接口,网线有8根,4根都是GND,发送2根（Tx-,Tx+),接收2根(Rx+,Rx-)
        网卡芯片CS引脚(片选信号),210每个SROM bank对应选信号CSn(n=0-5),210的DM9000接在CSn1(SROM bank1),DM9000总线地址基地址是0x88000000
        DM9000的CMD引脚接210的ADDR2引脚,数据线和地址线复用,CMD为高电平传输DATA,低电平传输INDEX(偏移地址)
        socket接口和网络mingling(ping,tftp...)是对网卡驱动的封装实现的

         DM9000移植(/drivers/net/dm9000x.c,dm9000x.h)

        网卡硬件配置

        网卡基地址：SROMC_BANK1（0x88000000） + 0x300(网卡芯片内部偏移（自带）)

        网卡命令地址(CMD,DM9000_DATA):  网卡基地址 + 4,由于使用ADDR2（0b100）

/** Hardware drivers*/
#define DM9000_16BIT_DATA#define CONFIG_DRIVER_DM9000    1#ifdef CONFIG_DRIVER_DM9000
#define CONFIG_DM9000_BASE              (0x88000300)
#define DM9000_IO                       (CONFIG_DM9000_BASE)
#if defined(DM9000_16BIT_DATA)
#define DM9000_DATA                     (CONFIG_DM9000_BASE+4)
#else
#define DM9000_DATA                     (CONFIG_DM9000_BASE+1)
#endif
#endif

                网卡初始化在uboot二阶段init_sequences中进行网卡芯片初始化(board_init->dm9000_pre_init,软件初始化)

                设置CSn1（16位数据线,DATA线和SD线号对应：1）

                设置SROM_BC1 

                设置GPIO 

 

/** Miscellaneous platform dependent initialisations*/static void dm9000_pre_init(void)
{unsigned int tmp;#if defined(DM9000_16BIT_DATA)//SROM_BW_REG &= ~(0xf << 20);//SROM_BW_REG |= (0<<23) | (0<<22) | (0<<21) | (1<<20);SROM_BW_REG &= ~(0xf << 4);SROM_BW_REG |= (1<<7) | (1<<6) | (1<<5) | (1<<4);#elseSROM_BW_REG &= ~(0xf << 20);SROM_BW_REG |= (0<<19) | (0<<18) | (0<<16);
#endif//SROM_BC5_REG = ((0<<28)|(1<<24)|(5<<16)|(1<<12)|(4<<8)|(6<<4)|(0<<0));SROM_BC1_REG = ((0<<28)|(1<<24)|(5<<16)|(1<<12)|(4<<8)|(6<<4)|(0<<0));tmp = MP01CON_REG;tmp &=~(0xf<<20);tmp |=(2<<20);MP01CON_REG = tmp;
}
s5pv110.h#define ELFIN_SROM_BASE                 0xE8000000#define SROM_BW_REG                     __REG(ELFIN_SROM_BASE+0x0)#define SROM_BC1_REG                    __REG(ELFIN_SROM_BASE+0x8)#define ELFIN_GPIO_BASE                 0xE0200000#define MP01CON_OFFSET                  0x2E0#define MP01CON_REG                     __REG(ELFIN_GPIO_BASE + MP01CON_OFFSET)

重新编译，移植uboot，启动内核