s3c2440 移值新内核 linux-4.1.36

arm-linuxgcc version 4.3.2 经过试验,最高可以编译到 linux-4.1.36 ,在高的版本会有错误 ,可能是 GCC 编译器版本较低造成。

解压比较麻烦还要装一个 xz xz -d ,我是用 7z-zip 在电脑上解好,传 tar 上去解包。
修改 makefile
ARCH ?= arm
CROSS_COMPILE ?= arm-linux-

find -name *24*_defconfig 查找出来有的配置项
./arch/arm/configs/s3c2410_defconfig
./arch/arm/configs/mini2440_defconfig

s3c2410_defconfig 也包含 2440 machid
vi /arch/arm/mach-s3c24xx/mach-smdk2440.c 修改 晶振为 12000000
vi /arch/arm/mach-s3c24xx/common-smdk.c 修改 nand flash 分区信息

 1 static struct mtd_partition smdk_default_nand_part[] = {
 2     [0] = {
 3         .name    = "uboot",
 4         .size    = SZ_256K,
 5         .offset    = 0,
 6     },
 7     [1] = {
 8         .name    = "env",
 9         .offset = MTDPART_OFS_APPEND,
10         .size    = SZ_128K,
11     },
12     [2] = {
13         .name    = "kernel",
14         .offset = MTDPART_OFS_APPEND,
15         .size    = SZ_2M,
16     },
17     [3] = {
18         .name    = "rootfs",
19         .offset    = MTDPART_OFS_APPEND,
20         .size    = MTDPART_SIZ_FULL,
21     }
22 };

make s3c2410_defconfig
make menuconfig
启用 EABI
[*] Use the ARM EABI to compile the kernel
[*] Allow old ABI binaries to run with this kernel (EXPERIMENTAL)
make uImage
Image arch/arm/boot/uImage is ready
cp arch/arm/boot/uImage /nfs_fs

查看 u-boot 2016 中配置的机器 ID
/arch/arm/lib/bootm.c boot_jump_linux()
从 gd 中取出来
unsigned long machid = gd->bd->bi_arch_number;

在 /board/samsung/smdk2440/smdk2440.c 中进行设置

/arch/arm/include/asm/mact-types.h 中定义
#define MACH_TYPE_SMDK2410 193

s = getenv("machid");
从 env 中取出来

随意乱设个 machid 启用就会报错,显示出来所有 可用的 machid
set machid 12345
nfs 0x32000000 192.168.1.100:/nfs_fs/uImage;bootm 0x32000000

因为是未知的 machid 所以报错
000007cf MINI2440
0000016a SMDK2440

..........
set machid 16a

加上波特率配置,不加也会乱码
set bootargs root=/dev/mtdblock3 init=/linuxrc console=ttySAC0,115200

bdinfo  可以查看 gd 信息

开启串口调试,有错误就能显示出来,否则什么也不显示。不知道哪里出错了。
Device Drivers
Character devices
Serial drivers
Samsung SoC serial debug

制作 文件系统 参考之前的博文 http://www.cnblogs.com/ningci/p/5261567.html

1, 制作 jffs2 文件系统
mkfs.jffs2 -n -s 2048 -e 128KiB -d new_1.24 -o new_1.24.jffs2

nfs 0x30000000 192.168.1.100:/nfs_fs/new_1.24.jffs2
nand erase.part root
nand write.jffs2 0x30000000 260000 3bc24c

set bootargs root=/dev/mtdblock3 init=/linuxrc console=ttySAC0,115200 rootfstype=jffs2
set machid 16a
nfs 0x30000000 192.168.1.100:/nfs_fs/uImage;bootm 0x30000000

烧写试验 能挂载文件系统 

2, 添加 yaffs2 支持
http://www.yaffs.net/
git clone git://www.aleph1.co.uk/yaffs2
下载解压,打补丁
./patch-ker.sh c m /home/linux-4.1.24
make uImage
fs/yaffs2/yaffs_vfs.c: In function 'yaffs_readpage_nolock':
fs/yaffs2/yaffs_vfs.c:286: error: 'struct file' has no member named 'f_dentry'
fs/yaffs2/yaffs_vfs.c: In function 'yaffs_hold_space':
fs/yaffs2/yaffs_vfs.c:484: error: 'struct file' has no member named 'f_dentry'
fs/yaffs2/yaffs_vfs.c: In function 'yaffs_release_space':
fs/yaffs2/yaffs_vfs.c:502: error: 'struct file' has no member named 'f_dentry'
fs/yaffs2/yaffs_vfs.c: In function 'yaffs_file_write':
fs/yaffs2/yaffs_vfs.c:594: error: 'struct file' has no member named 'f_dentry'
fs/yaffs2/yaffs_vfs.c:606: error: 'struct file' has no member named 'f_dentry'
fs/yaffs2/yaffs_vfs.c: In function 'yaffs_file_flush':
fs/yaffs2/yaffs_vfs.c:730: error: 'struct file' has no member named 'f_dentry'
fs/yaffs2/yaffs_vfs.c: At top level:
fs/yaffs2/yaffs_vfs.c:780: error: 'new_sync_read' undeclared here (not in a function)
fs/yaffs2/yaffs_vfs.c:781: error: 'new_sync_write' undeclared here (not in a function)
fs/yaffs2/yaffs_vfs.c: In function 'yaffs_iterate':
fs/yaffs2/yaffs_vfs.c:1730: error: 'struct file' has no member named 'f_dentry'
make[2]: *** [fs/yaffs2/yaffs_vfs.o] Error 1
make[1]: *** [fs/yaffs2] Error 2
make: *** [fs] Error 2

fs/yaffs2/yaffs_vfs.c 中 file 结构体定义变了
f_dentry 替换为 f_path.dentry


780 缺少函数

搜了一下有这个函数 /fs/read_write.c
static ssize_t new_sync_read(struct file *filp, char __user *buf, size_t len, loff_t *ppos)
前面加有 static 外面用不了,经过试验,发现不使用这2行也正常工作。所以改为如下。
#if 0
.read = new_sync_read,
.write = new_sync_write,
#endif

制作 yaffs2 文件
mkyaffs2image new_1.24 new_1.24.yaff2

nfs 0x30000000 192.168.1.100:/nfs_fs/new_1.24.yaff2
nand erase.part root
nand write.yaffs 0x30000000 260000 797640

set bootargs root=/dev/mtdblock3 init=/linuxrc console=ttySAC0,115200
set machid 16a
nfs 0x30000000 192.168.1.100:/nfs_fs/uImage;bootm 0x30000000

linux-3.4.112 正常,不用任何修改,打上 yaffs 补丁就能使用

yaffs 操作比 jfss 快不少。

最后 内核裁剪,没难度,去掉不用的东西变小就行。

原文地址:https://www.cnblogs.com/ningci/p/5524473.html