一、u-boot基本常用命令
1. 基本环境设置
setenv serverip 192.168.1.115
setenv ipaddr 192.168.1.211
setenv gatewayip 192.168.1.1
setenv ethaddr 1E:23:37:48:5A:6B

setenv bootargs root=/dev/mtdblock2 rootfstype=yaffs init=/linuxrc mem=64M console=ttySAC0,115200

setenv bootcmd nand read 30008000 80000 200000 \; bootm

saveenv

2. 烧写Boot
tftp 30008000 u-boot-tq.bin
nand erase 0 60000
nand write 30008000 0 60000

3. 加载内核
tftp 30008000 zImage.img
bootm

4. 烧写rootfs
(1)如果是256MB的Nand Flash，使用如下命令烧写：
tftp 30008000 root_tq2440.yaffs2
nand erase 480000 FB60000
nand write.yaffs 30008000 480000 $(filesize)

(2)如果是64MB的Nand Flash，使用如下命令烧写：
tftp 30008000 root_tq2440.yaffs2
nand erase 480000 3B60000
nand write.yaffs 30008000 480000 $(filesize)

5. 烧写内核

tftp 30008000 zImage.img
nand erase 80000 400000
nand write 30008000 80000 200000

6. 使用nfs配置:

setenv bootargs root=nfs nfsroot=192.168.1.115:/source/rootfs ip=192.168.1.211 console=ttySAC0,115200 init=/linuxrc mem=64M

二、Linux 2.6.32.10在tq2440开发板上的移植

明确相关板级配置:
(1) CPU -- s3c2440, 外部晶振12M
(2) SDRAM -- 64MB
(3) Nand Flash -- 64MB[K9F1208] 或 256MB[K9F2G08]
(4) 网卡 -- DM9000, 映射在BANK4

0. 外部晶振频率修改
static void __init smdk2440_map_io(void)
{
s3c24xx_init_io(smdk2440_iodesc, ARRAY_SIZE(smdk2440_iodesc));
s3c24xx_init_clocks(16934400);
s3c24xx_init_uarts(smdk2440_uartcfgs, ARRAY_SIZE(smdk2440_uartcfgs));
}

=》

static void __init smdk2440_map_io(void)
{
s3c24xx_init_io(smdk2440_iodesc, ARRAY_SIZE(smdk2440_iodesc));
s3c24xx_init_clocks(12000000); //修改为12M
s3c24xx_init_uarts(smdk2440_uartcfgs, ARRAY_SIZE(smdk2440_uartcfgs));
}

1.修改nand flash分区:
arch/arm/plat-s3c24xx/common-smdk.c

(1)如果是256MB的Nand,按如下修改 [256MB -- 0x10000000]

/* NAND parititon from 2.4.18-swl5 */
static struct mtd_partition smdk_default_nand_part[] = {
[0] = {
.name = "BootLoader",
.size = 0x00060000, /* 3 Blocks -- 384K*/
.offset = 0,
},
[1] = {
.name = "Kernel",
.size = 0x00400000, /* 32 Blocks -- 4MB */
.offset = 0x00080000,
},
[2] = {
.name = "Rootfs",
.size = 0x0FB80000, /* 251MB + 512KB*/
.offset = 0x00480000,
}
};

如果是256MB的Nand，使用uboot擦出分区命令如下：
//Erase Kernel Partition
nand erase 80000 400000

//Erase Rootfs Partition
nand erase 480000 FB80000

(2) 如果是64MB的Nand,按如下修改 [64MB -- 0x4000000]

/* NAND parititon from 2.4.18-swl5 */
static struct mtd_partition smdk_default_nand_part[] = {
[0] = {
.name = "BootLoader",
.size = 0x00060000, /* 24 Blocks -- 384K*/
.offset = 0,
},
[1] = {
.name = "Kernel",
.size = 0x00400000, /* 256 Blocks -- 4MB */
.offset = 0x00080000,
},
[2] = {
.name = "Rootfs",
.size = 0x03B80000, /* 59MB + 512KB*/
.offset = 0x00480000,
}
};

如果是64MB的Nand，使用uboot擦出分区命令如下：
//Erase Kernel Partition
nand erase 80000 400000

//Erase Rootfs Partition
nand erase 480000 3B80000

2. yaffs2补丁：

./patch-ker.sh c ../linux-2.6.32.10

3. DM9000网络驱动移植
(1)
arch/arm/mach-s3c2440/mach-smdk2440.c
增加

#include