二、移植linux内核所需文件：内核：Linux-2.6.29.1.tar.bz2yaffs2代码：cvs-root.tar.gz解压在工作目录下,分别是：linux-2.6.29.1cvs
1.修改内核源码修改内核根目录的makefile，第193行：ARCH ?=arm CROSS_COMPILE ?=arm-linux-
修改MTD分区：$vim arch/arm/plat-s3c24xx/common-smdk.c
static struct mtd_partition smdk_default_nand_part[] = {[0] = {.name = "vivi",.size = 0x00020000,.offset = 0,},[1] = {.name = "param",.offset = 0x00020000,.size = 0x00010000,},[2] = {.name = "kernel-2.6.29",.offset = 0x00030000,.size = 0x00200000,},[3] = {.name = "root",.offset = 0x00230000,.size = 0x00800000,},[4] = {.name = "yaffs",.offset = 0x00a30000,.size = 0x035cc000,}}
修改ECC校验：$vim driver/mtd/nand/s3c2410.c找到s3c2410_nand_init_chip()函数，将其中的 chip->ecc.mode=NAND_ECC_SOFT; 改成 chip->ecc.mode=NAND_ECC_NONE;
2.为内核打yaffs文件系统补丁$cd cvs/yaffs2$./patch-ker.sh c ../../linux-2.6.29.1/
3.移植DM9000网卡驱动访问基址是0x10000000（BANK2）：Index地址是0x10000000，Data地址是0x10000002.地址线是ADD1,链接DM9000的CMD引脚，总线位宽16位，中断引脚为EINT2
添加DM9000平台设备：$vim arch/arm/plat-s3c24xx/common-smdk.c/*添加要包含的头文件*/#if defined(CONFIG_DM9000)||defined(CONFIG_DM9000_MODULE)#include <linux/dm9000.h>#endif/*添加DM9000的平台设备结构*/#if defined(CONFIG_DM9000)|| defined(CONFIG_DM9000_MODULE)static struct resource s3c_dm9k_resource[] = { [0] = { .start = S3C2410_CS2, //ADD1=0时使用的地址 .end = S3C2410_CS2 + 1, .flags = IORESOURCE_MEM, },
[1] = { .start = S3C2410_CS2 + 2, //ADD1=1时使用的地址 .end = S3C2410_CS2 + 2 + 1, .flags = IORESOURCE_MEM, }, [2] = { .start = IRQ_EINT2, //中断号 .end = IRQ_EINT2, .flags = IORESOURCE_IRQ, }};
static struct dm9000_plat_data s3c_dm9k_platdata = { .flags = DM9000_PLATF_16BITONLY, //数据总线宽度为16位};
static struct platform_device s3c_device_dm9k = { .name = "dm9000", .id = 0, .num_resources = ARRAY_SIZE(s3c_dm9k_resource), .resource = s3c_dm9k_resource, .dev = { .platform_data = &s3c_dm9k_platdata, }};#endif
/*加入内核设备列表*/static struct platform_device __initdata *smdk_devs[] = {/*DM9000*/#if defined(CONFIG_DM9000) || efined(CONFIG_DM9000_MODULE)&s3c_device_dm9k,#endif......};
修改DM9000驱动程序:$vim drivers/net/dm9000.c/*添加要包含的头文件*/#if defined (CONFIG_ARCH_S3C2410)#include <mach/regs-mem.h>#endif
/*设置存储控制器使BANK2可用，设置默认MAC地址*//*添加的代码被宏CONFIG_ARCH_S3C2410包含起来*/dm9000_probe(struct platform_device *pdev){...... int i;u32 id_val;/*DM9000 device*/#if defined(CONFIG_ARCH_S3C2410)unsigned int oldval_bwscon;unsigned int oldval_bankcon2;#endif
......
SET_NETDEV_DEV(ndev, &pdev->dev);dev_dbg(&pdev->dev, "dm9000_probe()/n");
/*DM9000 device*/#if defined(CONFIG_ARCH_S3C2410)oldval_bwscon = *((volatile unsigned int *)S3C2410_BWSCON);*((volatile unsigned int *)S3C2410_BWSCON) = (oldval_bwscon & ~(3<<8)) | S3C2410_BWSCON_DW2_16 | S3C2410_BWSCON_WS2 | S3C2410_BWSCON_ST2;
oldval_bankcon2 = *((volatile unsigned int *)S3C2410_BANKCON2);*((volatile unsigned int *)S3C2410_BANKCON2) = 0x1f7c;#endif......
if (!is_valid_ether_addr(ndev->dev_addr)) {dev_warn(db->dev, "%s: Invalid ethernet MAC address. Please " "set using ifconfig/n", ndev->name);
/*DM9000 device*/#if defined(CONFIG_ARCH_S3C2410)printk("NOW use the default MAC address: 08:90:90:90:90:90/n");ndev->dev_addr[0] = 0x08;ndev->dev_addr[1] = 0x90;ndev->dev_addr[2] = 0x90;ndev->dev_addr[3] = 0x90;ndev->dev_addr[4] = 0x90;ndev->dev_addr[5] = 0x90;#endif}......
out:dev_err(db->dev, "not found (%d)./n", ret);
#if defined(cONFIG_ARCH_S3C2410)*((volatile unsigned int *)S3C2410_BWSCON) = oldval_bwscon;*((volatile unsigned int *)S3C2410_BANKCON2) = oldval_bankcon2;#endif......}
/*注册中断，指定触发方式*/dm9000_open(struct net_device *dev){......irqflags |= IRQF_SHARED;
#if defined(CONFIG_ARCH_S3C2410)if (request_irq(dev->irq, &dm9000_interrupt, IRQF_SHARED|IRQF_TRIGGER_RISING, dev->name, dev))#elseif (request_irq(dev->irq, &dm9000_interrupt, IRQF_SHARED, dev->name, dev))#endif return -EAGAIN;......}
4.配置内核$make s3c2410_defconfig$make menuconfig[*] Enable loadable module support ---> [*] Forced module loading [*] Module unloading
System Type ---> S3C2410 Machines ---> [*] SMDK2410/A9M2410 其余Machines都不选（包括2400,2440等）
Kernel Features ---> [*] Use the ARM EABI to compile the kernel Boot options ---> noinitrd root=/dev/mtdblock3 init=/linuxrc console=ttySAC0
Userspace binary formats ---> [*] Kernel support for ELF binaries
Device Drivers ---> [*] Network device support ---> [*] Ethernet (10 or 100Mbit) ---> <*> DM9000 support
File systems ---> [*] Miscellaneous filesystems ---> <*> YAFFS2 file system support [*] Lets Yaffs do its own ECC -*- Native language support ---> <*>Codepage 437 (United States, Canada) <*>Simplified Chinese charset (CP936, GB2312) <*>Traditional Chinese charset (Big5) <*>ASCII (United States) <*>NLS ISO 8859-1 (Latin 1; Western European Languages) <*>NLS UTF-8
$make zImage
将/arch/arm/boot目录下生成的zImage下载到kernel分区。
