主要修改内容如下：
1.vim arch/arm/mach-s3c2440/mach-smdk2440.c
#include <linux/dm9000.h> //添加DM9000网卡的头文件
添加如下代码
/* add DM9000 ethernet drivers ,whitch is bodify by liuchengdeng */
#define DM9000_BASE (S3C2410_CS4 + 0x300)
static struct resource s3c_dm9000_resource[] = {
[0] = {
.start = DM9000_BASE,
.end = DM9000_BASE + 3,
.flags = IORESOURCE_MEM
},
[1] = {
.start = DM9000_BASE + 4,
.end = DM9000_BASE + 7,
.flags = IORESOURCE_MEM
},
[2] = {
.start = IRQ_EINT7,
.end = IRQ_EINT7,
.flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
}
};
/*
* The DM9000 has no eeprom, and it's MAC address is set by
* the bootloader before starting the kernel.
*/
static struct dm9000_plat_data s3c_dm9000_pdata = {
.flags = (DM9000_PLATF_16BITONLY | DM9000_PLATF_NO_EEPROM),
};
static struct platform_device s3c_device_dm9000 = {
.name = "dm9000",
.id = -1,
.num_resources = ARRAY_SIZE(s3c_dm9000_resource),
.resource = s3c_dm9000_resource,
.dev = {
.platform_data = &s3c_dm9000_pdata,
},
};
/* modify end */
2.修改platform_device *smdk2440_devices[] __initdata结构体为如下，在其中添加启动DM9000
static struct platform_device *smdk2440_devices[] __initdata = {
&s3c_device_ohci,
&s3c_device_lcd,
&s3c_device_wdt,
&s3c_device_i2c0,
&s3c_device_iis,
&s3c_device_dm9000,
};
3.vim include/linux/dm9000.h 添加如下头文件
#include <linux/io.h>
重新make之后，这样我们的镜像文件就能支持DM9000网络了，系统跑起来的时候，就可以用tftp下载文件到我们的最小系统里。然后ping 192.168.1.83 就可以通了。