AT91RM9200引导程序的建立--------U-Boot1.1.4在AT91RM9200上的移植
| AT91RM9200引导程序的建立--------U-Boot1.1.4在AT91RM9200上的移植 | |
| 作者： Administrator | |
| 2007-11-14 | |
|
U-Boot1.1.4
移植
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_info[i].sector_count; 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。)
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