i.MX Processors中的主题 Re: How can I upgrade Linux kernel remotely uploading a new Linux kernel version on an i.mx28 reference board. Running Linux kernel 2.6.35.3. Can I copy a new imx28_ivt_linux.sb without overwriting the existing one onto the board and boot into this new im

How can I upgrade Linux kernel remotely uploading a new Linux kernel version on an i.mx28 reference board. Running Linux kernel 2.6.35.3. Can I copy a new imx28_ivt_linux.sb without overwriting the existing one onto the board and boot into this new image?

zekibulbul — Tue, 25 Mar 2014 21:22:39 GMT

How could I safely upgrade a Linux kernel image (imx28_ivt_linux.sb) remotely on a reference imx28 board.

What are my options? E.g. dual partition and dual kernel images? Copy the new kernel to a new directory and able to pint to it for booting? ...

Linux kernel version is 2.6.35.3

Re: How can I upgrade Linux kernel remotely uploading a new Linux kernel version on an i.mx28 reference board. Running Linux kernel 2.6.35.3. Can I copy a new imx28_ivt_linux.sb without overwriting the existing one onto the board and boot into this new im

GraceH — Mon, 31 Mar 2014 02:28:37 GMT

You can't run imx_ivt_linux.sb from a running kernel. Because imx_ivt_linux.sb includes 4 images which be loaded by ROM and run sequentially. you can reference imx-bootlets-src-2.6.35.3-1.1.0/linux_ivt.bd.

Grace

Re: How can I upgrade Linux kernel remotely uploading a new Linux kernel version on an i.mx28 reference board. Running Linux kernel 2.6.35.3. Can I copy a new imx28_ivt_linux.sb without overwriting the existing one onto the board and boot into this new im

zekibulbul — Mon, 31 Mar 2014 16:31:24 GMT

Thank you for the response. I see that linux_ivt.bd calls power_prep, sdram_prep, linux_prep and then loads zImage and jumps to0x8000. Can the linux_ivt.bd script updated at runtime and e.g. change the zImage path and reboot? How about using kexec? Would loading a new zimage with kexec-l and then executing the new kernel with kexec -e work?

Re: How can I upgrade Linux kernel remotely uploading a new Linux kernel version on an i.mx28 reference board. Running Linux kernel 2.6.35.3. Can I copy a new imx28_ivt_linux.sb without overwriting the existing one onto the board and boot into this new im

alejandrolozan1 — Mon, 31 Mar 2014 21:42:32 GMT

Hi Grace,

I tried to use dd from the imx23 and copy the /boot/imx23_linux.sb with the corresponding offsets to the mmcblk0p1 in this case.

It did not work, It thought it must work but it did not.

One of the possible ways I use to think that Zeki could use was to use TFTP to get the new .sb file and then just dd to replace the older one.

Can you provide more details about the correct procedure?

Best Regards,

Alejandro

Re: How can I upgrade Linux kernel remotely uploading a new Linux kernel version on an i.mx28 reference board. Running Linux kernel 2.6.35.3. Can I copy a new imx28_ivt_linux.sb without overwriting the existing one onto the board and boot into this new im

GraceH — Tue, 01 Apr 2014 03:05:48 GMT

Linux_ivt.bd script is for ROM. "load" "jump" are all ROM commands.

kexec can be used to load kernel image on runtime. But unfortunately kexec can't work well in i.mx28 2.6.35.3 kernel.

Grace

Re: How can I upgrade Linux kernel remotely uploading a new Linux kernel version on an i.mx28 reference board. Running Linux kernel 2.6.35.3. Can I copy a new imx28_ivt_linux.sb without overwriting the existing one onto the board and boot into this new im

GraceH — Tue, 01 Apr 2014 03:24:47 GMT

For MX23, follow below steps to create SD card for boot.

1. run fdisk /dev/sdb to create partition like below. the type of partition 2 is 53.

Disk /dev/sdb: 1977 MB, 1977614336 bytes

61 heads, 62 sectors/track, 1021 cylinders

Units = cylinders of 3782 * 512 = 1936384 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0xa9280686

Device Boot Start End Blocks Id System

/dev/sdb1 1 18 34007 b W95 FAT32

/dev/sdb2 19 36 34038 53 OnTrack DM6 Aux3

/dev/sdb3 37 1021 1862635 83 Linux

sudo dd if=/dev/zero of=mmc_boot_partition.raw bs=512 count=4

sudo dd if=imx23_linux.sb of=mmc_boot_partition.raw ibs=512 seek=4 conv=sync,notrunc

sudo dd if=mmc_boot_partition.raw of=/dev/sdb2

3. copy rootfs to partition 3

Grace