i.MX Processors中的主题 How to load an initramfs image using u-boot (i.MX28) ? https://community.nxp.com/t5/i-MX-Processors/How-to-load-an-initramfs-image-using-u-boot-i-MX28/m-p/159620#M3016 <HTML><HEAD></HEAD><BODY><P>Hello !</P><P><BR />I have tried to load my kernel and a custom initramfs without success. For this purpose, I formatted a SD card like below:<BR /><BR />* Partition 1 (FAT16): u-boot parameters<BR />* Partition 2 (Sigmatel): u-boot image, prepared to be loaded by i.MX28 ROM<BR />* Partition 3 (FAT16): kernel and initramfs files<BR />* Partition 4 (ext3): rootfs<BR /><BR />Using fatload, I loaded kernel to position 0x42000000 and initramfs to position 0x42300000 (kernel fits in 3MB). I used the kernel parameters related to ramfs:<BR /><BR />root=/dev/ram0 rootfstype=ramfs initrd=0x42300000<BR /><BR />However, after mounting the rootfs, kernel can not execute init. I have specified init as well, using initrd=/bin/ash or init=/bin/ash, just to test, no donuts for me in both cases.<BR /><BR />Tired of this approach, I thought about the strategy of inserting initramfs inside kernel. I configured the kernel and provided such cpio image. The kernel size becomes bigger, as expected. However, when loading this kernel using fatload, I receive a bad CRC message and kernel can not be loaded.<BR /><BR />I saw that ltib can generate two ramfs images: a standard cpio image or a u-boot (?) cpio image. I have used the first one since the second has a kind o header.<BR /><BR />Anyone out there have booted the system using u-boot, kernel and and initramfs to help me ? The idea is to have a safe boot environment based on ramfs, only mounting the rootfs after checks and validations or fetching a new rootfs using ftp/tftp. Moreover, this way, it is possible to update the kernel, safe boot (ramfs) or rootfs file system in the field easily.<BR /><BR />Thanks in advance !</P></BODY></HTML> Thu, 30 Jun 2011 02:20:39 GMT MarceloBarros 2011-06-30T02:20:39Z How to load an initramfs image using u-boot (i.MX28) ? https://community.nxp.com/t5/i-MX-Processors/How-to-load-an-initramfs-image-using-u-boot-i-MX28/m-p/159620#M3016 <HTML><HEAD></HEAD><BODY><P>Hello !</P><P><BR />I have tried to load my kernel and a custom initramfs without success. For this purpose, I formatted a SD card like below:<BR /><BR />* Partition 1 (FAT16): u-boot parameters<BR />* Partition 2 (Sigmatel): u-boot image, prepared to be loaded by i.MX28 ROM<BR />* Partition 3 (FAT16): kernel and initramfs files<BR />* Partition 4 (ext3): rootfs<BR /><BR />Using fatload, I loaded kernel to position 0x42000000 and initramfs to position 0x42300000 (kernel fits in 3MB). I used the kernel parameters related to ramfs:<BR /><BR />root=/dev/ram0 rootfstype=ramfs initrd=0x42300000<BR /><BR />However, after mounting the rootfs, kernel can not execute init. I have specified init as well, using initrd=/bin/ash or init=/bin/ash, just to test, no donuts for me in both cases.<BR /><BR />Tired of this approach, I thought about the strategy of inserting initramfs inside kernel. I configured the kernel and provided such cpio image. The kernel size becomes bigger, as expected. However, when loading this kernel using fatload, I receive a bad CRC message and kernel can not be loaded.<BR /><BR />I saw that ltib can generate two ramfs images: a standard cpio image or a u-boot (?) cpio image. I have used the first one since the second has a kind o header.<BR /><BR />Anyone out there have booted the system using u-boot, kernel and and initramfs to help me ? The idea is to have a safe boot environment based on ramfs, only mounting the rootfs after checks and validations or fetching a new rootfs using ftp/tftp. Moreover, this way, it is possible to update the kernel, safe boot (ramfs) or rootfs file system in the field easily.<BR /><BR />Thanks in advance !</P></BODY></HTML> Thu, 30 Jun 2011 02:20:39 GMT https://community.nxp.com/t5/i-MX-Processors/How-to-load-an-initramfs-image-using-u-boot-i-MX28/m-p/159620#M3016 MarceloBarros 2011-06-30T02:20:39Z Re: How to load an initramfs image using u-boot (i.MX28) ? https://community.nxp.com/t5/i-MX-Processors/How-to-load-an-initramfs-image-using-u-boot-i-MX28/m-p/159621#M3017 <HTML><HEAD></HEAD><BODY><P>Did you ever get this working?&nbsp; I want to do the exact same thing on an imx28 and am having similar issues.</P><P></P><P>Thanks,</P><P>Bill</P></BODY></HTML> Thu, 13 Sep 2012 22:10:47 GMT https://community.nxp.com/t5/i-MX-Processors/How-to-load-an-initramfs-image-using-u-boot-i-MX28/m-p/159621#M3017 blsousan 2012-09-13T22:10:47Z