hi,all
now I want to boot from nand and using jffs2 filesystem , replace
network filesystem. I use the davinci dvevm for this test.
I have done some work for this design, they are :
Part I-- make kernel
1.1 add nand partion
static struct mtd_partition nand_partitions[] = {
/* bootloader (U-Boot, etc) in first sector */
{
.name = "bootloader",
.offset = 0,
.size = SZ_256K,
.mask_flags = MTD_WRITEABLE, /* force read-only */
},
/* bootloader params in the next sector */
{
.name = "params",
.offset = MTDPART_OFS_APPEND,
.size = SZ_128K,
.mask_flags = MTD_WRITEABLE, /* force read-only */
},
/* kernel */
{
.name = "kernel",
.offset = MTDPART_OFS_APPEND,
.size = SZ_4M,
.mask_flags = 0
},
/* file system */
{
.name = "filesystem",
.offset = MTDPART_OFS_APPEND,
.size = MTDPART_SIZ_FULL,
.mask_flags = 0
}
};
1.2 add nand flash support in kernel config
1.3 add jffs2 support in kernel config
it seems that the current montavista 2.6.10 doesn't support jffs2
filesystem , only jfs .
any suggestions?
Part II make jffs2 filesystem
1. mkjs.jffs2 -r rootfs -o jffs2.img
Part III burn kernel and filesystem on nand
1. flash_eraseall /dev/mtd2
2. nandwrite -p /dev/mtd2 uImage
3. flash_eraseall /dev/mtd3
4. nandwrite -p /dev/mtd3 jffs2.img
Part IV set enviroment for nand boot
1. setenv bootcmd 'nboot 0x80200000 0 60000'
2. setenv autostart yes
3. setenv bootargs console=ttyS0,115200n8 noinitrd rw ip=off
root=/dev/mtdblock3 mem=120M rootfstype=jffs2
4. savenv
Part V boot
but the result is not right.the error is
Loading from device 0: <NULL> at 0x2000000 (offset 0x60000)
Image Name: Linux-2.6.10_mvl401
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 1127008 Bytes = 1.1 MB
Load Address: 80008000
Entry Point: 80008000
Automatic boot of image at addr 0x80200000 ...
## Booting image at 80200000 ...
Image Name: Linux-2.6.10_mvl401
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 1127008 Bytes = 1.1 MB
Load Address: 80008000
Entry Point: 80008000
Verifying Checksum ... Bad Data CRC
DaVinci EVM #
why error occur ?
thanks?
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