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标题: 关于制作ramdisk [打印本页]

作者: cooboos 时间: 2010-05-26 10:32
标题: 关于制作ramdisk
我现在做到了文件系统这一步，文件系统使用nfs时，kernel可以正常启动。但是将它做成ramdisk时（yaffs）,无法启动，显示如下错误信息：
emac-mii: probed
List of all partitions:
No filesystem could mount root, tried: ext3 ext2 cramfs vfat msdos
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(1,0)
我做的步骤是这样的：将nfs里面的文件用mkyaffsimage做成ramdisk，然后压缩，烧入flash

bootargs参数设置为
setenv bootargs 'mem=128M console=ttyS0,115200n8 root=/dev/ram0 rw init=/linuxrc initrd=0x80800000,8M'

然后启动就出现上面的问题。
在网上查了一下，好像在 arch/arm/mach-xxxx/board-xxxx.c里面修改一下struct mtd_partition{}这个。但是我不知道怎么修改。是不是还要将做的rootfs烧写到mtdblockN？这个该怎么做？

如果我的做法不对的话，正确的步骤试什么？

作者: cooboos 时间: 2010-05-26 14:04
[ 3.870000] dm9000 Ethernet Driver, V1.31
[ 3.880000] mice: PS/2 mouse device common for all mice
[ 3.880000] i2c /dev entries driver
[ 3.890000] TCP cubic registered
[ 3.890000] NET: Registered protocol family 17
[ 3.900000] Clocks: disable unused emac
[ 3.900000] Clocks: disable unused usb
[ 3.900000] Clocks: disable unused timer1
[ 3.920000] davinci_emac_probe: using random MAC addr: da:7f:c7:03:e0:15
[ 3.930000] emac-mii: probed
[ 3.930000] RAMDISK: Couldn't find valid RAM disk image starting at 0.
[ 3.950000] List of all partitions:
[ 3.950000] No filesystem could mount root, tried: ext3 ext2 cramfs vfat msdos
[ 3.960000] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(1,0)
[ 3.970000] Backtrace:
[ 3.970000] [<c002d6f8>] (dump_backtrace+0x0/0x114) from [<c002dbfc>] (dump_stack+0x18/0x1c)
[ 3.980000] r6:c03139b0 r5:c78110d9 r4:c7823f48
[ 3.990000] [<c002dbe4>] (dump_stack+0x0/0x1c) from [<c003c770>] (panic+0x60/0x14

[ 3.990000] [<c003c710>] (panic+0x0/0x14

from [<c000902c>] (mount_block_root+0x18c/0x224)
[ 4.000000] r3:c7823f68 r2:c7823f48 r1:c7823f48 r0:c02be65c
[ 4.010000] [<c0008ea0>] (mount_block_root+0x0/0x224) from [<c0009190>] (mount_root+0xcc/0xf4)
[ 4

Z这是打印的信息

请高手指点一下有点乱了

作者: hua_ma 时间: 2010-05-26 17:24
没听说过用yaffs做ramdisk的

作者: hua_ma 时间: 2010-05-26 17:26
sorry 没看好你这也不是ramdisk啊 I am confused.

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