Difference between revisions of "DaVinci Initrd 1.0"
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<code><pre> | <code><pre> | ||
| − | + | > dd if=/dev/zero of=uRamdisk.img bs=1k count=20480 | |
| − | + | > mkfs.ext2 -F -v -M0 uRamdisk.img | |
| − | + | > mount -o loop uRamdisk.img <path to mount point> | |
</pre></code> | </pre></code> | ||
Now copy all the files needed for RAMDISK to the <path to mount point>.. that would be busybox and/or other apps and libs. | Now copy all the files needed for RAMDISK to the <path to mount point>.. that would be busybox and/or other apps and libs. | ||
<code><pre> | <code><pre> | ||
| − | + | > umount <path to mount point> | |
| − | + | > gzip -9 < uRamdisk.img > uRamdisk | |
</pre></code> | </pre></code> | ||
Installing the Ramdisk (/tftpboot/uRamdisk) via u-boot | Installing the Ramdisk (/tftpboot/uRamdisk) via u-boot | ||
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<code><pre> | <code><pre> | ||
| − | # install_ramdisk 'tftp 0x2200000 uRamdisk; era 0x2200000 +${filesize};cp.b 0x85000000 0x2200000 ${filesize}' | + | UBOOT# install_ramdisk 'tftp 0x2200000 uRamdisk; era 0x2200000 +${filesize};cp.b 0x85000000 0x2200000 ${filesize}' |
</pre></code> | </pre></code> | ||
Save the ramdisk size into an environmental variable: | Save the ramdisk size into an environmental variable: | ||
<code><pre> | <code><pre> | ||
| − | # setenv ramdisksize 0x${filesize}; saveenv | + | UBOOT# setenv ramdisksize 0x${filesize}; saveenv |
</pre></code> | </pre></code> | ||
Update the boot parameters: | Update the boot parameters: | ||
<code><pre> | <code><pre> | ||
| − | # setenv bootargs 'mem=120M console=ttyS0,115200n8 ip=dhcp root=/dev/ram0 rw initrd=0x85000000,8M' | + | UBOOT# setenv bootargs 'mem=120M console=ttyS0,115200n8 ip=dhcp root=/dev/ram0 rw initrd=0x85000000,8M' |
| − | # setenv bootcmd 'cp.b 0x2200000 0x85000000 ${ramdisksize}; bootm' | + | UBOOT# setenv bootcmd 'cp.b 0x2200000 0x85000000 ${ramdisksize}; bootm' |
</pre></code> | </pre></code> | ||
Revision as of 06:35, 4 July 2007
Create initrd Procedure (note change count to your required filesystem size):
> dd if=/dev/zero of=uRamdisk.img bs=1k count=20480
> mkfs.ext2 -F -v -M0 uRamdisk.img
> mount -o loop uRamdisk.img <path to mount point>
Now copy all the files needed for RAMDISK to the <path to mount point>.. that would be busybox and/or other apps and libs.
> umount <path to mount point>
> gzip -9 < uRamdisk.img > uRamdisk
Installing the Ramdisk (/tftpboot/uRamdisk) via u-boot
Copy the data into RAM then flash:
UBOOT# install_ramdisk 'tftp 0x2200000 uRamdisk; era 0x2200000 +${filesize};cp.b 0x85000000 0x2200000 ${filesize}'
Save the ramdisk size into an environmental variable:
UBOOT# setenv ramdisksize 0x${filesize}; saveenv
Update the boot parameters:
UBOOT# setenv bootargs 'mem=120M console=ttyS0,115200n8 ip=dhcp root=/dev/ram0 rw initrd=0x85000000,8M'
UBOOT# setenv bootcmd 'cp.b 0x2200000 0x85000000 ${ramdisksize}; bootm'
