U-Boot1.1.4在AT91RM9200上的移植（转）

u-boot修改。

由于我们的板子和atmel的DK板不同，所以针对我们的硬件，要重新修改u-boot代码,特别是flash驱动部分。

 

1)修改board/at91rm9200dk/config.mk

TEXT_BASE＝0x21f00000 将U-Boot载入32MSDRAM的高端部分，即最高端1M的空间留给U-Boot代码。

 

2)修改include/configs/at91rm9200dk.h

 修改Flash和SDRAM的大小：

 

   #define PHYS_SDRAM_SIZE 0x2000000 /* 32 megs */

    #define PHYS_FLASH_SIZE 0x200000 /* 2 megs main flash */

同时定义如下环境变量：

#define CONFIG_DEFAULT_ENVIRONMENT
#define CONFIG_BOARDNAME "AT91RM9200DK"

#define CONFIG_ETHADDR "00:11:22:33:44:55"

#define CONFIG_IPADDR "192.168.1.100"

#define CONFIG_SERVERIP "192.168.1.1"

//#define CONFIG_GATEWAYIP "192.168.18.1"

#define CONFIG_BOOTCOMMAND "tftp 0x20008000 zImage; tftp 0x20410000 ramdisk;go 0x20008000"

#define CONFIG_DEFAULT_KERNEL "2.6.17"

从上面可以看出，我们板子的IP地址是192.168.1.100,而我们的宿主机IP地址为192.168.1.1 ，我们的网卡Mac为：00:11:22:33:44:55。

3)修改flash驱动

borad/at91rm9200dk/flash.c这个文件修改的部分比较的多。

1.     首先是OrgDef的定义，加上目前的flash。

   

OrgDef OrgSSTvF6401B[]=

{

                                     {2048,4*1024},   /*2048*64KBytes sectors*/

};

修改函数flash_identification(flash_info_t * info),显示正确的信息。

void flash_identification (flash_info_t * info)

{

       volatile u16 manuf_code, device_code, add_device_code;

 

       MEM_FLASH_ADDR1 = FLASH_CODE1;

       MEM_FLASH_ADDR2 = FLASH_CODE2;

       MEM_FLASH_ADDR1 = ID_IN_CODE;

 

       manuf_code = *(volatile u16 *) CFG_FLASH_BASE;

       device_code = *(volatile u16 *) (CFG_FLASH_BASE + 2);

       add_device_code = *(volatile u16 *) (CFG_FLASH_BASE + (3 << 1));

 

       MEM_FLASH_ADDR1 = FLASH_CODE1;

       MEM_FLASH_ADDR2 = FLASH_CODE2;

       MEM_FLASH_ADDR1 = ID_OUT_CODE;

 

       /* Vendor type */

       /*

       if(info->flash_id = ATM_MANUFACT & FLASH_VENDMASK)

       {

                 printf ("Atmel: ");

       }

       */

       if(info->flash_id=SST_MANUFACT & FLASH_VENDMASK)    //zzl061206

       {

                 printf("SST:");

       }

/*atmel identify*/

       if ((device_code & FLASH_TYPEMASK) == (ATM_ID_BV1614 & FLASH_TYPEMASK)) {

 

                 if ((add_device_code & FLASH_TYPEMASK) ==

                            (ATM_ID_BV1614A & FLASH_TYPEMASK)) {

                            info->flash_id |= ATM_ID_BV1614A & FLASH_TYPEMASK;

                            printf ("AT49BV1614A (16Mbit)\n");

                 } else {                                 /* AT49BV1614 Flash */

                            info->flash_id |= ATM_ID_BV1614 & FLASH_TYPEMASK;

                            printf ("AT49BV1614 (16Mbit)\n");

                 }

 

       } else if ((device_code & FLASH_TYPEMASK) == (ATM_ID_BV6416 & FLASH_TYPEMASK)) {  

                 info->flash_id |= ATM_ID_BV6416 & FLASH_TYPEMASK;

                 printf ("AT49BV6416 (64Mbit)\n");

       }

       /*sst identify*/

      else if((device_code & FLASH_TYPEMASK) == (SST_ID_xF6401B & FLASH_TYPEMASK)) //zzl061206

      {

               info->flash_id |= SST_ID_xF6401B & FLASH_TYPEMASK;

               printf("vF6401B(64Mbit)\n");

      }

}

 

2. 修改初始化Flash函数ulong flash_init

 

(void)ulong flash_init (void)

{

       int i, j, k;

       unsigned int flash_nb_blocks, sector;

       unsigned int start_address;

       OrgDef *pOrgDef;

 

       ulong size = 0;

 

       for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {

                 ulong flashbase = 0;

 

                 flash_identification (&flash_info[i]);

 

                 if ((flash_info[i].flash_id & FLASH_TYPEMASK) ==

                            (ATM_ID_BV1614 & FLASH_TYPEMASK)) {

 

                            pOrgDef = OrgAT49BV16x4;

                            flash_nb_blocks = sizeof (OrgAT49BV16x4) / sizeof (OrgDef);

                 } else if ((flash_info[i].flash_id & FLASH_TYPEMASK) ==

                            (ATM_ID_BV1614A & FLASH_TYPEMASK)){      /* AT49BV1614A Flash */

 

                            pOrgDef = OrgAT49BV16x4A;

                            flash_nb_blocks = sizeof (OrgAT49BV16x4A) / sizeof (OrgDef);

                 } else if ((flash_info[i].flash_id & FLASH_TYPEMASK) ==

                            (ATM_ID_BV6416 & FLASH_TYPEMASK)){       /* AT49BV6416 Flash */

 

                            pOrgDef = OrgAT49BV6416;

                            flash_nb_blocks = sizeof (OrgAT49BV6416) / sizeof (OrgDef);

                 }

                 /*zzl*/

               else if((flash_info[i].flash_id & FLASH_TYPEMASK)==

                        (SST_ID_xF6401B & FLASH_TYPEMASK))

               {

                        pOrgDef=OrgSSTvF6401B;

                        flash_nb_blocks = sizeof (OrgSSTvF6401B) / sizeof (OrgDef);

               }

                 else {

                            flash_nb_blocks = 0;

                            pOrgDef = OrgAT49BV16x4;

                 }

 

                 flash_info[i].sector_count = flash_number_sector(pOrgDef, flash_nb_blocks);

                 memset (flash_info[i].protect, 0, flash_info[i].sector_count);

 

                 if (i == 0)

                            flashbase = PHYS_FLASH_1;

                 else

                            panic ("configured too many flash banks!\n");

 

                 sector = 0;

                 start_address = flashbase;

                 flash_info[i].size = 0;

 

                 for (j = 0; j < flash_nb_blocks; j++) {

                            for (k = 0; k < pOrgDef[j].sector_number; k++) {

                                      flash_info[i].start[sector++] = start_address;

                                      start_address += pOrgDef[j].sector_size;

                                      flash_info[i].size += pOrgDef[j].sector_size;

                            }

                 }

 

                 size += flash_info[i].size;

 

                 if ((flash_info[i].flash_id & FLASH_TYPEMASK) ==

                            (ATM_ID_BV6416 & FLASH_TYPEMASK)){       /* AT49BV6416 Flash */   /*zzl*/

 

                            /* Unlock all sectors at reset */

                            for (j=0; j

                                      flash_unlock_sector(&flash_info[i], j);

                            }

                 }

       }

 

       /* Protect binary boot image */

       flash_protect (FLAG_PROTECT_SET,

                        CFG_FLASH_BASE,

                        CFG_FLASH_BASE + CFG_BOOT_SIZE - 1, &flash_info[0]);

 

       /* Protect environment variables */

       flash_protect (FLAG_PROTECT_SET,

                        CFG_ENV_ADDR,

                        CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]);

 

       /* Protect U-Boot gzipped image */

       flash_protect (FLAG_PROTECT_SET,

                        CFG_U_BOOT_BASE,

                        CFG_U_BOOT_BASE + CFG_U_BOOT_SIZE - 1, &flash_info[0]);

 

       return size;

 

3.修改 函数flash_erase()，将检测flash类型注释掉，因为先前已经检测过

 

      /* first look for protection bits */

/*zzl 20061206

       if (info->flash_id == FLASH_UNKNOWN)

                 return ERR_UNKNOWN_FLASH_TYPE;

 

       if ((s_first < 0) || (s_first > s_last)) {

                 return ERR_INVAL;

       }

 

       if ((info->flash_id & FLASH_VENDMASK) !=

                 (ATM_MANUFACT & FLASH_VENDMASK)) {

                 return ERR_UNKNOWN_FLASH_VENDOR;

       }

*/

但是这里出现了一个问题，编译后IP地址为0.192.168.1,serverip也是0.192.168.1。修改net/net.c中获得IP地址的函数。

IPaddr_t getenv_IPaddr (char *var)

{

       /*zzl*/

       char tmp_str[64];

       strcpy(tmp_str,getenv(var));

if(isxdigit(*tmp_str))     /*测试环境变量字符是否是16进制，如果是,从第一个字符开始取4个字节，如果不是，则从第二个字符开始取4个字节。*/

                 return (string_to_ip(tmp_str));

       else

                 return(string_to_ip(tmp_str+1));

      

/*old code

       return (string_to_ip(getenv(var)));

       */

}

重新编译

#make distclean

#make at91rm9200dk_config

#make all

编译成功后得到u-boot.bin的二进制文件，即为需要的可执行映象文件，将其用仿真器通过JTAG烧进flash中。板子重新上电，U-Boot启动成功。(注：U-Boot1.1.4已经不需要将其压缩为u-boot.gz。直接烧入flash的0地址后，便能启动,进入u-boot下。)