全部博文(343)
分类: LINUX
2006-09-11 23:46:30
S
作者:wpq
参照llg写的关于hharm(e28f128flash)上的jffs2的移植
具体如下:
1.移植环境:
CPU:ARMS
Linux version:
Flash:Intel E
2.修改设备号
由于ROM设备和MTDBlock设备的主设备号(major)都是31,所以如果你不想把JFFS2作为根文件系统的话,必须修改他们之一的major。如果你要修改JFFS2的设备major,在uClinux-dist/linux-2.4.x/include/linux/mtd/mtd.h中把
#define MTD_BLOCK_MAJOR 31
改成
#define MTD_BLOCK_MAJOR 30
3.编写Maps文件
添加在flash上的map文件。在HHARM2410-R3/kernel/drivers/mtd/maps下添加flash(e28f128j3a-150)的map,我把握的文件内容贴上,仅供参考:
S
/*
* Normal mappings of chips on Samsung s
*/
#include
#include
#include
#include
#include
#include
#include
#include
#define WINDOW_ADDR 0x01000000 //基地址
#define WINDOW_SIZE 0x01600000 //flash大小
#define BUSWIDTH 2
static struct mtd_info *mymtd;
__u8 s
{
return readb(map->map_priv_1 + ofs);
}
__u16 s
{
return readw(map->map_priv_1 + ofs);
}
__u32 s
{
return readl(map->map_priv_1 + ofs);
}
void s
{
memcpy(to, (void *)(map->map_priv_1 + from), len);
}
void s
{
writeb(d, map->map_priv_1 + adr);
}
void s
{
writew(d, map->map_priv_1 + adr);
}
void s
{
writel(d, map->map_priv_1 + adr);
}
void s
{
memcpy((void *)(map->map_priv_1 + to), from, len);
}
struct map_info s
name: "s
size: WINDOW_SIZE,
buswidth: BUSWIDTH,
read8: s
read16: s
read32: s
copy_from: s
write8: s
write16: s
write32: s
copy_to: s
map_priv_1: WINDOW_ADDR,
map_priv_2: -1,
};
//以下是分区的内容,当然要根据你自己的需要确定了
static struct mtd_partition s
{
name: "reserved for bootloader",
size: 0x040000,
offset: 0x0,
mask_flags: MTD_WRITEABLE,
},
{
name: "reserved for kernel",
size: 0x0100000,
offset: 0x040000,
mask_flags: MTD_WRITEABLE,
},
{
name: "reserved for ramdisk",
size: 0x400000,
offset: 0x140000,
mask_flags: MTD_WRITEABLE,
},
{
name: "jffs2(
size: 0x800000,
offset: 0x800000,
}
};
int __init init_s
{
printk(KERN_NOTICE "s
s
//printk("0\n");
if (!s
printk("Failed to ioremap/n");
return -EIO;
}
//printk("1\n");
mymtd = do_map_probe("jedec_probe", &s
if (!mymtd)
mymtd = do_map_probe("cfi_probe", &s
//printk("2\n");
if (mymtd) {
mymtd->module = THIS_MODULE;
mymtd->erasesize = 0x20000; //擦除的大小 INTEL E
return add_mtd_partitions(mymtd, s
}
//printk("3\n");
iounmap((void *)s
return -ENXIO;
}
static void __exit cleanup_s
{
if (mymtd) {
del_mtd_partitions(mymtd);
map_destroy(mymtd);
}
if (s
iounmap((void *)s
s
}
}
module_init(init_s
module_exit(cleanup_s
至于其文件内容及语句的含义网上相关的文章也有不少,参考一下吧。
4.将配置加入HHARM2410-R3/kernel/drivers/mtd/maps/Config.in
if [ "$CONFIG_ARM" = "y" ]; then
dep_tristate ' CFI Flash device mapped on ARM Integrator/P720T' CONFIG_MTD_ARM_INTEGRATOR $CONFIG_MTD_CFI $CONFIG_ARCH_INTEGRATOR
dep_tristate ' Cirrus CDB89712 evaluation board mappings' CONFIG_MTD_CDB89712 $CONFIG_MTD_CFI $CONFIG_ARCH_CDB89712
dep_tristate ' CFI Flash device mapped on StrongARM SA11x0' CONFIG_MTD_SA1100 $CONFIG_MTD_CFI $CONFIG_ARCH_SA1100 $CONFIG_MTD_PARTITIONS
dep_tristate ' CFI Flash device mapped on DC21285 Footbridge' CONFIG_MTD_DC21285 $CONFIG_MTD_CFI $CONFIG_ARCH_FOOTBRIDGE $CONFIG_MTD_PARTITIONS
dep_tristate ' CFI Flash device mapped on
dep_tristate ' CFI Flash device mapped on the FortuNet board' CONFIG_MTD_FORTUNET $CONFIG_MTD_CFI $CONFIG_ARCH_FORTUNET $CONFIG_MTD_PARTITIONS
dep_tristate ' CFI Flash device mapped on Epxa10db' CONFIG_MTD_EPXA10DB $CONFIG_MTD_CFI $CONFIG_MTD_PARTITIONS $CONFIG_ARCH_CAMELOT
dep_tristate ' CFI Flash device mapped on PXA CerfBoard' CONFIG_MTD_PXA_CERF $CONFIG_MTD_CFI $CONFIG_ARCH_PXA_CERF $CONFIG_MTD_PARTITIONS
dep_tristate ' NV-RAM mapping AUTCPU12 board' CONFIG_MTD_AUTCPU12 $CONFIG_ARCH_AUTCPU12
#wpq add S
dep_tristate ' CFI Flash device mapped on S
fi
5. 修改Makefile文件
在HHARM2410-R3/kernel/drivers/mtd/maps/ Makefile文件中加入如下语句(当然要根据你的实际情况写啊?!):
#wpq add
obj-$(CONFIG_MTD_S
6.配置内核使其支持jffs2
说明:
这里要特别注意Memory Technology Devices (MTD)的选项支持及其子项
RAM/ROM/Flash chip drivers --->
Mapping drivers for chip access --->
的选项支持;
还有File systems下选项支持。
##################################
***********************
#############################################
Linux Kernel v
Linux Kernel v
------------------------------------------------------------------------------
+-------------------- Memory Technology Devices (MTD) --------------------+
| Arrow keys navigate the menu.
| Highlighted letters are hotkeys. Pressing
|
| Legend: [*] built-in [ ] excluded
| +---------------------------------------------------------------------+ |
| | <*> Memory Technology Device (MTD) support | |
| | [*] Debugging | |
| | (3) Debugging verbosity (0 = quiet, 3 = noisy) | |
| | <*> MTD partitioning support | |
| | <*> MTD concatenating support | |
| | < > RedBoot partition table parsing | |
| | < > Command line partition table parsing | |
| | < > ARM Firmware Suite partition parsing | |
| | --- User Modules And Translation Layers | |
| | <*> Direct char device access to MTD devices | |
| | <*> Caching block device access to MTD devices | |
| < > FTL (Flash Translation Layer) support | |
| | < > NFTL (NAND Flash Translation Layer) support | |
| | RAM/ROM/Flash chip drivers ---> | |
| | Mapping drivers for chip access ---> | |
| | Self-contained MTD device drivers ---> | |
| | NAND Flash Device Drivers ---> | |
| +---------------------------------------------------------------------+ |
+------------------------
| +---------v(+)--------------------------------------------------------+ |
+-------------------------------------------------------------------------+
|
+---------------------------------------------------
Linux Kernel v
------------------------------------------------------------------------------
+---------------------- RAM/ROM/Flash chip drivers -----------------------+
| Arrow keys navigate the menu.
| Highlighted letters are hotkeys. Pressing
|
| Legend: [*] built-in [ ] excluded
| +---------------------------------------------------------------------+ |
| |<*> Detect flash chips by Common Flash Interface (CFI) probe | |
| |<*> Detect JEDEC JESD
| |[ ] Flash chip driver advanced configuration options | |
| |<*> Support for Intel/Sharp flash chips | |
| |< > Support for AMD/Fujitsu flash chips | |
| |< > Support for RAM chips in bus mapping | |
| |< > Support for ROM chips in bus mapping | |
| |< > Support for absent chips in bus mapping | |
| |[ ] Older (theoretically obsoleted now) drivers for non-CFI chips | |
| | | |
| | | |
| +---------------------------------------------------------------------+ |
+-------------------------------------------------------------------------+
|
+-------------------------------------------------------------------------+
Linux Kernel v
------------------------------------------------------------------------------
+-------------------- Mapping drivers for chip access --------------------+
| Arrow keys navigate the menu.
| Highlighted letters are hotkeys. Pressing
|
| Legend: [*] built-in [ ] excluded
| +---------------------------------------------------------------------+ |
| | <*> CFI Flash device in physical memory map | |
| | (800000) Physical start address of flash mapping | |
| | (800000) Physical length of flash mapping | |
| | (2) Bus width in octets | |
| | <*> CFI Flash device mapped on S
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| +---------------------------------------------------------------------+ |
+-------------------------------------------------------------------------+
|
+-------------------------------------------------------------------------+
Linux Kernel v
------------------------------------------------------------------------------
+----------------------------- File systems ------------------------------+
| Arrow keys navigate the menu.
| Highlighted letters are hotkeys. Pressing
|
| Legend: [*] built-in [ ] excluded
| +---------------------------------------------------------------------+ |
| | [ ] Quota support | |
| | < > Kernel automounter support | |
| | < > Kernel automounter version 4 support (also supports v3) | |
| | < > Reiserfs support | |
| | < > ADFS file system support | |
| | < > Amiga FFS file system support (EXPERIMENTAL) | |
| | < > Apple Macintosh file system support (EXPERIMENTAL) | |
| | < > BFS file system support (EXPERIMENTAL) | |
| | <*> Ext3 journalling file system support (EXPERIMENTAL) | |
| | [ ] JBD (ext3) debugging support | |
| | <*> DOS FAT fs support | |
| < > MSDOS fs support | |
| | <*> VFAT (Windows-95) fs support | |
| | < > EFS file system support (read only) (EXPERIMENTAL) | |
| | < > Journalling Flash File System (JFFS) support | |
| | <*> Journalling Flash File System v2 (JFFS2) support | |
| | (2) JFFS2 debugging verbosity (0 = quiet, 2 = noisy) | |
| | <*> Compressed ROM file system support | |
| | [*] Virtual memory file system support (former shm fs) | |
| | <*> Simple RAM-based file system support | |
| | < > ISO 9660 CDROM file system support | |
| | < > Minix fs support
| < > FreeVxFS file system support (VERITAS VxFS(TM) compatible) | |
| | < > NTFS file system support (read only) | |
| | < > OS/2 HPFS file system support | |
| | [*] /proc file system support | |
| | [*] /dev file system support (EXPERIMENTAL) | |
| | [*] Automatically mount at boot | |
| | [ ] Debug devfs | |
| | [*] /dev/pts file system for Unix98 PTYs | |
| | < > QNX4 file system support (read only) (EXPERIMENTAL) | |
| | < > ROM file system support | |
| | <*> Second extended fs support
| [ ] Debug devfs | |
| | [*] /dev/pts file system for Unix98 PTYs | |
| | < > QNX4 file system support (read only) (EXPERIMENTAL) | |
| | < > ROM file system support | |
| | <*> Second extended fs support | |
| | < > System V/Xenix/V7/Coherent file system support | |
| | < > UDF file system support (read only) | |
| | < > UFS file system support (read only) | |
| | Network File Systems ---> | |
| | Partition Types ---> | |
| | Native Language Support --->
| +--v(+)---------------------------------------------------------------+ |
+-------------------------------------------------------------------------+
|
+-------------------------------------------------------------------------+
7.制作jffs2映象
首先取得jffs2的制作工具:mkfs.jffs2(可从网上取得)
执行如下命令即可生成所要的映象:
chmod 777 mkfs.jffs2 //取得mkfs.jffs2的执行权限,即mkfs.jffs2成为可执行文件
./mkfs.jffs2 -d jffs2/ -o jffs2.img //生成jffs2文件映象,其中目录jffs2可以是任意的目录,这里的jffs2是我新建的一个目录
8.Jffs2的应用
对于ppcboot、zImage、ramdisk.image.gz向romfs一样正常烧写;
以上三项烧写完之后,接着烧写jffs2.img,具体烧写如下:
tftp 30800000 jffs2.img
fl 1800000 30800000 20000 (其中20000可根据jffs2的大小适当调整,理论上只要比jffs2.img略大即可,但要为20000的整数倍)
特别注意:要想使我们做的jffs2文件系统更加的人性化,我们还可以在ramdisk.image.gz的mnt/etc/init.d/rc$文件中加入如下指令以便启动时自动挂载jffs2文件系统。
Mount -t jffs2 /dev/mtdblock/4 /mnt //其中的/dev/mtdblock/4是flash上的jffs2分区。
9.以上配置烧写完成之后就可启动我们的系统,对jffs2分区尽情的添加和删除了,添加的东东再不会因断电而丢失了,呵呵就到这了。