uncompressing of romfs.img

Altera_Forum · ‎06-29-2006

hello friend

i have one prblem->

i have dump my u-boot ,kernel and filesystem with following data

flash: 0x00000000----0x0020000(2MB)

sdram: 0x00800000----0x00ffffff(8MB)

restart address: 0x00000000

exception address: 0x00800020

u-boot download address: 0x00000000

the kernel of uclinux download address: 0x00020000

the kernel of uclinux load address is 0x00800000

the kernel of uclinux entry address is 0x00800000

the filesystem of uclinux download address: 0x00100000

the filesystem of uclinux load address is 0x00a00000

the filesystem of uclinux entry address is 0x00a00000

u-boot is 100k

vmlinux.bin.gz is 450KB

romfs.bin.gz is 438KB

and

i use the command to compress the kernel : gzip -9 vmlinux.bin

mkimage -A nios2 -O linux -T kernel -C gzip -a 0x00800000 -e 0x00800000 -n 'Linux Kernel Image' -d vmlinux.bin.gz uImage.img

mkimage -A nios2 -O linux -T filesystem -C gzip -a 0x00c00000 -e 0x00c00000 -n 'romfs EP1C6' -d romfs.bin.gz romfs.img

but previously ,when i have load onlt romfs.bin (uncompress)at that time ,i got perfect o/p,but now when i use gzip file then kernel is booting but it is not able to uncompress romfs.img

please help me

Altera_Forum · ‎06-30-2006

You should not compress romfs.

And romfs should be write to flash on the romfs partition in the mtd map.

It would be easier if you use initramfs. no more romfs headache.

Altera_Forum · ‎06-30-2006

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originally posted by hippo@Jun 30 2006, 06:38 AM

you should not compress romfs.

and romfs should be write to flash on the romfs partition in the mtd map.

it would be easier if you use initramfs. no more romfs headache.

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--- quote end ---

--- Quote End ---

thanks hippo

but

can you tell me how to do initromfs? please

Altera_Forum · ‎06-30-2006

Please follow step 1-3 in, we use initramfs to build compressed image, zImage.

Then you can use nios2 flash programmer or u-boot to program the flash.

http://nioswiki.jot.com/wikihome/operating...ms/%c2%b5clinux (http://nioswiki.jot.com/wikihome/operatingsystems/%c2%b5clinux)

Altera_Forum · ‎06-30-2006

Hi All,

> mkimage -A nios2 -O linux -T filesystem -C gzip -a 0x00c00000 -e 0x00c00000 -n 'romfs EP1C6' -d

> romfs.bin.gz romfs.img

Just a note: passing a ramdisk image to the kernel as a parameter from a bootloader will not work.

The default kernel image (for Nios II) does not recognize any parameters (e.g. command line,

bd_t, ramdisk) passed to it from a boot loader. Hopefully, we will address this issue in the kernel

soon -- then add support in u-boot.

hippo, we should discuss this some time ... as it can affect the bzImage design.

Regards,

--Scott