* [U-Boot] using initrd with U-boot on the imx28evk
@ 2012-09-11 21:31 Bill
2012-09-12 22:29 ` Marek Vasut
0 siblings, 1 reply; 11+ messages in thread
From: Bill @ 2012-09-11 21:31 UTC (permalink / raw)
To: u-boot
Has anyone used U-boot on the imx28evk with initrd to setup a small
rootfs in RAM? I need the ability to do have a small temp rootfs to
assist in mounting a full rootfs from a USB for field upgrade purposes.
Thanks,
Bill
^ permalink raw reply [flat|nested] 11+ messages in thread
* [U-Boot] using initrd with U-boot on the imx28evk
2012-09-11 21:31 [U-Boot] using initrd with U-boot on the imx28evk Bill
@ 2012-09-12 22:29 ` Marek Vasut
2012-09-12 23:26 ` Bill
0 siblings, 1 reply; 11+ messages in thread
From: Marek Vasut @ 2012-09-12 22:29 UTC (permalink / raw)
To: u-boot
Dear Bill,
> Has anyone used U-boot on the imx28evk with initrd to setup a small
> rootfs in RAM? I need the ability to do have a small temp rootfs to
> assist in mounting a full rootfs from a USB for field upgrade purposes.
Yes, it's a linux thingie though. What's the problem? What version of uboot do
you use?
> Thanks,
> Bill
Best regards,
Marek Vasut
^ permalink raw reply [flat|nested] 11+ messages in thread
* [U-Boot] using initrd with U-boot on the imx28evk
2012-09-12 22:29 ` Marek Vasut
@ 2012-09-12 23:26 ` Bill
2012-09-12 23:44 ` Marek Vasut
0 siblings, 1 reply; 11+ messages in thread
From: Bill @ 2012-09-12 23:26 UTC (permalink / raw)
To: u-boot
I'm using U-boot version: U-Boot 2012.07
Through googling, I've come across several variations of using a
ramdisk. So I selected some things that looked good. So basically, I
am building a rootfs as a ramdisk by:
dd if=/dev/zero of=./myinitrd.img bs=1M count=35
mke2fs -m 1 ./myinitrd.img
mkdir ./myinitrd
mount -t ext2 ./myinitrd.img ./myinitrd -o loop
cp -r rootfs/* ./myinitrd/.
umount ./myinitrd/
gzip ./myinitrd.img
rm -rf myinitrd
Then I use the u-boot tool to prepare it for use with u-boot by:
u-boot-imx/tools/mkimage -n 'MyRamDisk' -A arm -O linux -T
ramdisk -C none -d ./myinitrd.img.gz rootfs-initrd
I place both both my uImage and rootfs-initrd on a USB stick and insert
it into the imx28evk and enter u-boot command line. I then do:
usb start
fatload usb 0 0x42000000 uimage
fatload usb 0 0x43000000 rootfs-initrd
setenv bootargs console=ttyAM0,115200n8 debug root=/dev/ram rw
ip=dhcp fec_mac=
bootm 0x42000000 0x43000000
u-boot then starts booting with:
## Booting kernel from Legacy Image at 42000000 ...
Image Name: Linux-2.6.35.3-571-gcca29a0-g45b
Created: 2012-09-08 22:31:46 UTC
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 2582304 Bytes = 2.5 MiB
Load Address: 40008000
Entry Point: 40008000
Verifying Checksum ... OK
## Loading init Ramdisk from Legacy Image at 43000000 ...
Image Name: MyRamDisk
Created: 2012-09-12 20:51:35 UTC
Image Type: ARM Linux RAMDisk Image (uncompressed)
Data Size: 37774 Bytes = 36.9 KiB
Load Address: 00000000
Entry Point: 00000000
Verifying Checksum ... OK
Loading Kernel Image ... OK
OK
Starting kernel ...
Uncompressing Linux... done, booting the kernel.
Linux version 2.6.35.3-571-gcca29a0-g45b53d0-dirty (blsousan at ubuntu)
(gcc version 4.4.4 (4.4.4_09.06.2010) ) #13 PREEMPT Sat Sep 8 14:06:34
PDT 2012
CPU: ARM926EJ-S [41069265] revision 5 (ARMv5TEJ), cr=00053177
CPU: VIVT data cache, VIVT instruction cache
Machine: Freescale MX28EVK board
....
....
....
The kernel starts to boot, I get all the kernel output, and at the end
it does not find the rootfs. I get:
...
...
...
List of all partitions:
b300 3872256 mmcblk0 driver: mmcblk
b301 1024 mmcblk0p1
0800 503808 sda driver: sd
0801 503792 sda1
No filesystem could mount root, tried: ext3 ext2 vfat msdos iso9660
Kernel panic - not syncing: VFS: Unable to mount root fs on
unknown-block(1,0)
Backtrace:
I not sure how the kernel knows where the ramdisk lives in memory (
0x43000000) where the the uboot put it ?
Thanks,
Bill
On 9/12/2012 5:29 PM, Marek Vasut wrote:
> Dear Bill,
>
>> Has anyone used U-boot on the imx28evk with initrd to setup a small
>> rootfs in RAM? I need the ability to do have a small temp rootfs to
>> assist in mounting a full rootfs from a USB for field upgrade purposes.
> Yes, it's a linux thingie though. What's the problem? What version of uboot do
> you use?
>
>> Thanks,
>> Bill
> Best regards,
> Marek Vasut
--
William (Bill) L. Sousan, Ph.D.
(w) 402.331.4977 ext. 4002
bsousan at techsi.com
Technical Support Inc.
11253 John Galt Blvd
Omaha, NE 68137
www.techsi.com
8(a) SDB Certified, ISO 9001:2008
^ permalink raw reply [flat|nested] 11+ messages in thread
* [U-Boot] using initrd with U-boot on the imx28evk
2012-09-12 23:26 ` Bill
@ 2012-09-12 23:44 ` Marek Vasut
2012-09-13 14:32 ` Bill
0 siblings, 1 reply; 11+ messages in thread
From: Marek Vasut @ 2012-09-12 23:44 UTC (permalink / raw)
To: u-boot
Dear Bill,
> I'm using U-boot version: U-Boot 2012.07
>
> Through googling, I've come across several variations of using a
> ramdisk. So I selected some things that looked good. So basically, I
> am building a rootfs as a ramdisk by:
>
> dd if=/dev/zero of=./myinitrd.img bs=1M count=35
> mke2fs -m 1 ./myinitrd.img
> mkdir ./myinitrd
> mount -t ext2 ./myinitrd.img ./myinitrd -o loop
> cp -r rootfs/* ./myinitrd/.
> umount ./myinitrd/
> gzip ./myinitrd.img
> rm -rf myinitrd
>
>
> Then I use the u-boot tool to prepare it for use with u-boot by:
> u-boot-imx/tools/mkimage -n 'MyRamDisk' -A arm -O linux -T
> ramdisk -C none -d ./myinitrd.img.gz rootfs-initrd
>
> I place both both my uImage and rootfs-initrd on a USB stick and insert
> it into the imx28evk and enter u-boot command line. I then do:
>
> usb start
> fatload usb 0 0x42000000 uimage
> fatload usb 0 0x43000000 rootfs-initrd
> setenv bootargs console=ttyAM0,115200n8 debug root=/dev/ram rw
> ip=dhcp fec_mac=
> bootm 0x42000000 0x43000000
>
>
> u-boot then starts booting with:
>
> ## Booting kernel from Legacy Image at 42000000 ...
> Image Name: Linux-2.6.35.3-571-gcca29a0-g45b
> Created: 2012-09-08 22:31:46 UTC
> Image Type: ARM Linux Kernel Image (uncompressed)
> Data Size: 2582304 Bytes = 2.5 MiB
> Load Address: 40008000
> Entry Point: 40008000
> Verifying Checksum ... OK
> ## Loading init Ramdisk from Legacy Image at 43000000 ...
> Image Name: MyRamDisk
> Created: 2012-09-12 20:51:35 UTC
> Image Type: ARM Linux RAMDisk Image (uncompressed)
> Data Size: 37774 Bytes = 36.9 KiB
> Load Address: 00000000
> Entry Point: 00000000
> Verifying Checksum ... OK
> Loading Kernel Image ... OK
> OK
>
> Starting kernel ...
>
> Uncompressing Linux... done, booting the kernel.
> Linux version 2.6.35.3-571-gcca29a0-g45b53d0-dirty (blsousan at ubuntu)
> (gcc version 4.4.4 (4.4.4_09.06.2010) ) #13 PREEMPT Sat Sep 8 14:06:34
> PDT 2012
> CPU: ARM926EJ-S [41069265] revision 5 (ARMv5TEJ), cr=00053177
> CPU: VIVT data cache, VIVT instruction cache
> Machine: Freescale MX28EVK board
> ....
> ....
> ....
>
> The kernel starts to boot, I get all the kernel output, and at the end
> it does not find the rootfs. I get:
>
> ...
> ...
> ...
>
> List of all partitions:
> b300 3872256 mmcblk0 driver: mmcblk
> b301 1024 mmcblk0p1
> 0800 503808 sda driver: sd
> 0801 503792 sda1
> No filesystem could mount root, tried: ext3 ext2 vfat msdos iso9660
> Kernel panic - not syncing: VFS: Unable to mount root fs on
> unknown-block(1,0)
> Backtrace:
>
>
> I not sure how the kernel knows where the ramdisk lives in memory (
> 0x43000000) where the the uboot put it ?
>
>
> Thanks,
> Bill
>
> On 9/12/2012 5:29 PM, Marek Vasut wrote:
> > Dear Bill,
> >
> >> Has anyone used U-boot on the imx28evk with initrd to setup a small
> >> rootfs in RAM? I need the ability to do have a small temp rootfs to
> >> assist in mounting a full rootfs from a USB for field upgrade purposes.
> >
> > Yes, it's a linux thingie though. What's the problem? What version of
> > uboot do you use?
Some ancient kernel you have ... did you enable ramdisk support in Linux? And
gzip compression for it ? And loop back block driver ?
> >> Thanks,
> >> Bill
> >
> > Best regards,
> > Marek Vasut
Best regards,
Marek Vasut
^ permalink raw reply [flat|nested] 11+ messages in thread
* [U-Boot] using initrd with U-boot on the imx28evk
2012-09-12 23:44 ` Marek Vasut
@ 2012-09-13 14:32 ` Bill
2012-09-17 21:31 ` Marek Vasut
0 siblings, 1 reply; 11+ messages in thread
From: Bill @ 2012-09-13 14:32 UTC (permalink / raw)
To: u-boot
Marek,
Yes, I checked the kernel and it is enabled for ramdisk support in
Linux, gzip compression, and loop back block driver. I did find some
other posts where some folks added the address of the ram drive. So I
changed the kernel arguments from:
setenv bootargs console=ttyAM0,115200n8 debug root=/dev/ram rw ip=dhcp fec_mac=
TO:
setenv bootargs console=ttyAM0,115200n8 debug root=/dev/ram rw initrd=0x43000000,40K ip=dhcp fec_mac=
And now the kernel output generates a additional error line from RAMDISK:
...
...
...
RAMDISK: Couldn't find valid RAM disk image starting at 0. <<<<<<<< This
line now appears on the console
List of all partitions:
b300 3872256 mmcblk0 driver: mmcblk
b301 1024 mmcblk0p1
0800 503808 sda driver: sd
0801 503792 sda1
No filesystem could mount root, tried: ext3 ext2 vfat msdos iso9660
Kernel panic - not syncing: VFS: Unable to mount root fs on
unknown-block(1,0)
...
...
...
Is it something with the RAM disk format or the uboot tool mkimage
parameters?
Thanks,
Bill
On 9/12/2012 6:44 PM, Marek Vasut wrote:
> Dear Bill,
>
>> I'm using U-boot version: U-Boot 2012.07
>>
>> Through googling, I've come across several variations of using a
>> ramdisk. So I selected some things that looked good. So basically, I
>> am building a rootfs as a ramdisk by:
>>
>> dd if=/dev/zero of=./myinitrd.img bs=1M count=35
>> mke2fs -m 1 ./myinitrd.img
>> mkdir ./myinitrd
>> mount -t ext2 ./myinitrd.img ./myinitrd -o loop
>> cp -r rootfs/* ./myinitrd/.
>> umount ./myinitrd/
>> gzip ./myinitrd.img
>> rm -rf myinitrd
>>
>>
>> Then I use the u-boot tool to prepare it for use with u-boot by:
>> u-boot-imx/tools/mkimage -n 'MyRamDisk' -A arm -O linux -T
>> ramdisk -C none -d ./myinitrd.img.gz rootfs-initrd
>>
>> I place both both my uImage and rootfs-initrd on a USB stick and insert
>> it into the imx28evk and enter u-boot command line. I then do:
>>
>> usb start
>> fatload usb 0 0x42000000 uimage
>> fatload usb 0 0x43000000 rootfs-initrd
>> setenv bootargs console=ttyAM0,115200n8 debug root=/dev/ram rw
>> ip=dhcp fec_mac=
>> bootm 0x42000000 0x43000000
>>
>>
>> u-boot then starts booting with:
>>
>> ## Booting kernel from Legacy Image at 42000000 ...
>> Image Name: Linux-2.6.35.3-571-gcca29a0-g45b
>> Created: 2012-09-08 22:31:46 UTC
>> Image Type: ARM Linux Kernel Image (uncompressed)
>> Data Size: 2582304 Bytes = 2.5 MiB
>> Load Address: 40008000
>> Entry Point: 40008000
>> Verifying Checksum ... OK
>> ## Loading init Ramdisk from Legacy Image at 43000000 ...
>> Image Name: MyRamDisk
>> Created: 2012-09-12 20:51:35 UTC
>> Image Type: ARM Linux RAMDisk Image (uncompressed)
>> Data Size: 37774 Bytes = 36.9 KiB
>> Load Address: 00000000
>> Entry Point: 00000000
>> Verifying Checksum ... OK
>> Loading Kernel Image ... OK
>> OK
>>
>> Starting kernel ...
>>
>> Uncompressing Linux... done, booting the kernel.
>> Linux version 2.6.35.3-571-gcca29a0-g45b53d0-dirty (blsousan at ubuntu)
>> (gcc version 4.4.4 (4.4.4_09.06.2010) ) #13 PREEMPT Sat Sep 8 14:06:34
>> PDT 2012
>> CPU: ARM926EJ-S [41069265] revision 5 (ARMv5TEJ), cr=00053177
>> CPU: VIVT data cache, VIVT instruction cache
>> Machine: Freescale MX28EVK board
>> ....
>> ....
>> ....
>>
>> The kernel starts to boot, I get all the kernel output, and at the end
>> it does not find the rootfs. I get:
>>
>> ...
>> ...
>> ...
>>
>> List of all partitions:
>> b300 3872256 mmcblk0 driver: mmcblk
>> b301 1024 mmcblk0p1
>> 0800 503808 sda driver: sd
>> 0801 503792 sda1
>> No filesystem could mount root, tried: ext3 ext2 vfat msdos iso9660
>> Kernel panic - not syncing: VFS: Unable to mount root fs on
>> unknown-block(1,0)
>> Backtrace:
>>
>>
>> I not sure how the kernel knows where the ramdisk lives in memory (
>> 0x43000000) where the the uboot put it ?
>>
>>
>> Thanks,
>> Bill
>>
>> On 9/12/2012 5:29 PM, Marek Vasut wrote:
>>> Dear Bill,
>>>
>>>> Has anyone used U-boot on the imx28evk with initrd to setup a small
>>>> rootfs in RAM? I need the ability to do have a small temp rootfs to
>>>> assist in mounting a full rootfs from a USB for field upgrade purposes.
>>> Yes, it's a linux thingie though. What's the problem? What version of
>>> uboot do you use?
> Some ancient kernel you have ... did you enable ramdisk support in Linux? And
> gzip compression for it ? And loop back block driver ?
>
>>>> Thanks,
>>>> Bill
>>> Best regards,
>>> Marek Vasut
> Best regards,
> Marek Vasut
--
William (Bill) L. Sousan, Ph.D.
(w) 402.331.4977 ext. 4002
bsousan at techsi.com
Technical Support Inc.
11253 John Galt Blvd
Omaha, NE 68137
www.techsi.com
8(a) SDB Certified, ISO 9001:2008
^ permalink raw reply [flat|nested] 11+ messages in thread
* [U-Boot] using initrd with U-boot on the imx28evk
2012-09-13 14:32 ` Bill
@ 2012-09-17 21:31 ` Marek Vasut
2012-09-17 21:44 ` Fabio Estevam
0 siblings, 1 reply; 11+ messages in thread
From: Marek Vasut @ 2012-09-17 21:31 UTC (permalink / raw)
To: u-boot
Dear Bill,
I'm CCing Fabio ... he might have some idea for you.
> Marek,
>
> Yes, I checked the kernel and it is enabled for ramdisk support in
> Linux, gzip compression, and loop back block driver. I did find some
> other posts where some folks added the address of the ram drive. So I
> changed the kernel arguments from:
>
> setenv bootargs console=ttyAM0,115200n8 debug root=/dev/ram rw ip=dhcp
> fec_mac= TO:
>
> setenv bootargs console=ttyAM0,115200n8 debug root=/dev/ram rw
> initrd=0x43000000,40K ip=dhcp fec_mac=
>
>
> And now the kernel output generates a additional error line from RAMDISK:
>
> ...
> ...
> ...
> RAMDISK: Couldn't find valid RAM disk image starting at 0. <<<<<<<< This
> line now appears on the console
> List of all partitions:
> b300 3872256 mmcblk0 driver: mmcblk
> b301 1024 mmcblk0p1
> 0800 503808 sda driver: sd
> 0801 503792 sda1
> No filesystem could mount root, tried: ext3 ext2 vfat msdos iso9660
> Kernel panic - not syncing: VFS: Unable to mount root fs on
> unknown-block(1,0)
> ...
> ...
> ...
>
>
> Is it something with the RAM disk format or the uboot tool mkimage
> parameters?
>
> Thanks,
> Bill
>
> On 9/12/2012 6:44 PM, Marek Vasut wrote:
> > Dear Bill,
> >
> >> I'm using U-boot version: U-Boot 2012.07
> >>
> >> Through googling, I've come across several variations of using a
> >> ramdisk. So I selected some things that looked good. So basically, I
> >>
> >> am building a rootfs as a ramdisk by:
> >> dd if=/dev/zero of=./myinitrd.img bs=1M count=35
> >> mke2fs -m 1 ./myinitrd.img
> >> mkdir ./myinitrd
> >> mount -t ext2 ./myinitrd.img ./myinitrd -o loop
> >> cp -r rootfs/* ./myinitrd/.
> >> umount ./myinitrd/
> >> gzip ./myinitrd.img
> >> rm -rf myinitrd
> >>
> >> Then I use the u-boot tool to prepare it for use with u-boot by:
> >> u-boot-imx/tools/mkimage -n 'MyRamDisk' -A arm -O linux -T
> >>
> >> ramdisk -C none -d ./myinitrd.img.gz rootfs-initrd
> >>
> >> I place both both my uImage and rootfs-initrd on a USB stick and insert
> >>
> >> it into the imx28evk and enter u-boot command line. I then do:
> >> usb start
> >> fatload usb 0 0x42000000 uimage
> >> fatload usb 0 0x43000000 rootfs-initrd
> >> setenv bootargs console=ttyAM0,115200n8 debug root=/dev/ram rw
> >>
> >> ip=dhcp fec_mac=
> >>
> >> bootm 0x42000000 0x43000000
> >>
> >> u-boot then starts booting with:
> >>
> >> ## Booting kernel from Legacy Image at 42000000 ...
> >>
> >> Image Name: Linux-2.6.35.3-571-gcca29a0-g45b
> >> Created: 2012-09-08 22:31:46 UTC
> >> Image Type: ARM Linux Kernel Image (uncompressed)
> >> Data Size: 2582304 Bytes = 2.5 MiB
> >> Load Address: 40008000
> >> Entry Point: 40008000
> >> Verifying Checksum ... OK
> >>
> >> ## Loading init Ramdisk from Legacy Image at 43000000 ...
> >>
> >> Image Name: MyRamDisk
> >> Created: 2012-09-12 20:51:35 UTC
> >> Image Type: ARM Linux RAMDisk Image (uncompressed)
> >> Data Size: 37774 Bytes = 36.9 KiB
> >> Load Address: 00000000
> >> Entry Point: 00000000
> >> Verifying Checksum ... OK
> >> Loading Kernel Image ... OK
> >>
> >> OK
> >>
> >> Starting kernel ...
> >>
> >> Uncompressing Linux... done, booting the kernel.
> >> Linux version 2.6.35.3-571-gcca29a0-g45b53d0-dirty (blsousan at ubuntu)
> >> (gcc version 4.4.4 (4.4.4_09.06.2010) ) #13 PREEMPT Sat Sep 8 14:06:34
> >> PDT 2012
> >> CPU: ARM926EJ-S [41069265] revision 5 (ARMv5TEJ), cr=00053177
> >> CPU: VIVT data cache, VIVT instruction cache
> >> Machine: Freescale MX28EVK board
> >> ....
> >> ....
> >> ....
> >>
> >> The kernel starts to boot, I get all the kernel output, and at the end
> >> it does not find the rootfs. I get:
> >>
> >> ...
> >> ...
> >> ...
> >>
> >> List of all partitions:
> >> b300 3872256 mmcblk0 driver: mmcblk
> >>
> >> b301 1024 mmcblk0p1
> >>
> >> 0800 503808 sda driver: sd
> >>
> >> 0801 503792 sda1
> >>
> >> No filesystem could mount root, tried: ext3 ext2 vfat msdos iso9660
> >> Kernel panic - not syncing: VFS: Unable to mount root fs on
> >> unknown-block(1,0)
> >> Backtrace:
> >>
> >>
> >> I not sure how the kernel knows where the ramdisk lives in memory (
> >> 0x43000000) where the the uboot put it ?
> >>
> >>
> >> Thanks,
> >> Bill
> >>
> >> On 9/12/2012 5:29 PM, Marek Vasut wrote:
> >>> Dear Bill,
> >>>
> >>>> Has anyone used U-boot on the imx28evk with initrd to setup a small
> >>>> rootfs in RAM? I need the ability to do have a small temp rootfs to
> >>>> assist in mounting a full rootfs from a USB for field upgrade
> >>>> purposes.
> >>>
> >>> Yes, it's a linux thingie though. What's the problem? What version of
> >>> uboot do you use?
> >
> > Some ancient kernel you have ... did you enable ramdisk support in Linux?
> > And gzip compression for it ? And loop back block driver ?
> >
> >>>> Thanks,
> >>>> Bill
> >>>
> >>> Best regards,
> >>> Marek Vasut
> >
> > Best regards,
> > Marek Vasut
^ permalink raw reply [flat|nested] 11+ messages in thread
* [U-Boot] using initrd with U-boot on the imx28evk
2012-09-17 21:31 ` Marek Vasut
@ 2012-09-17 21:44 ` Fabio Estevam
2012-09-18 13:22 ` Bill
0 siblings, 1 reply; 11+ messages in thread
From: Fabio Estevam @ 2012-09-17 21:44 UTC (permalink / raw)
To: u-boot
Bill,
On Mon, Sep 17, 2012 at 6:31 PM, Marek Vasut <marex@denx.de> wrote:
> Dear Bill,
>
> I'm CCing Fabio ... he might have some idea for you.
What about starting a thread in linux-arm-kernel for this?
Regards,
Fabio Estevam
^ permalink raw reply [flat|nested] 11+ messages in thread
* [U-Boot] using initrd with U-boot on the imx28evk
2012-09-17 21:44 ` Fabio Estevam
@ 2012-09-18 13:22 ` Bill
2012-09-18 13:36 ` Marek Vasut
2012-09-18 17:27 ` Wolfgang Denk
0 siblings, 2 replies; 11+ messages in thread
From: Bill @ 2012-09-18 13:22 UTC (permalink / raw)
To: u-boot
Thanks to both of you for following up. Over the weekend, I switched to
using the initramfs within the kernel configuration (in the Freescale
kernel) and set the source directory to my rootfs that will be the
ramdrive and it worked great! So I'll stick with this scenario. It's
nice too in that the rootfs (a small one) gets bundled up with the
kernel (uImage) so its just one file. So it works out really nice.
This is a good way for upgrading firmware from the flash.
Best,
Bill
On 9/17/2012 4:44 PM, Fabio Estevam wrote:
> Bill,
>
> On Mon, Sep 17, 2012 at 6:31 PM, Marek Vasut<marex@denx.de> wrote:
>> Dear Bill,
>>
>> I'm CCing Fabio ... he might have some idea for you.
> What about starting a thread in linux-arm-kernel for this?
>
> Regards,
>
> Fabio Estevam
^ permalink raw reply [flat|nested] 11+ messages in thread
* [U-Boot] using initrd with U-boot on the imx28evk
2012-09-18 13:22 ` Bill
@ 2012-09-18 13:36 ` Marek Vasut
2012-09-18 14:16 ` Bill
2012-09-18 17:27 ` Wolfgang Denk
1 sibling, 1 reply; 11+ messages in thread
From: Marek Vasut @ 2012-09-18 13:36 UTC (permalink / raw)
To: u-boot
Dear Bill,
> Thanks to both of you for following up. Over the weekend, I switched to
> using the initramfs within the kernel configuration (in the Freescale
> kernel) and set the source directory to my rootfs that will be the
> ramdrive and it worked great! So I'll stick with this scenario. It's
> nice too in that the rootfs (a small one) gets bundled up with the
> kernel (uImage) so its just one file. So it works out really nice.
> This is a good way for upgrading firmware from the flash.
Don't you want to check latest linux-next for the mx28 CPU?
> Best,
> Bill
>
> On 9/17/2012 4:44 PM, Fabio Estevam wrote:
> > Bill,
> >
> > On Mon, Sep 17, 2012 at 6:31 PM, Marek Vasut<marex@denx.de> wrote:
> >> Dear Bill,
> >>
> >> I'm CCing Fabio ... he might have some idea for you.
> >
> > What about starting a thread in linux-arm-kernel for this?
> >
> > Regards,
> >
> > Fabio Estevam
Best regards,
Marek Vasut
^ permalink raw reply [flat|nested] 11+ messages in thread
* [U-Boot] using initrd with U-boot on the imx28evk
2012-09-18 13:36 ` Marek Vasut
@ 2012-09-18 14:16 ` Bill
0 siblings, 0 replies; 11+ messages in thread
From: Bill @ 2012-09-18 14:16 UTC (permalink / raw)
To: u-boot
Good idea.
Best,
Bill
On 9/18/2012 8:36 AM, Marek Vasut wrote:
> Dear Bill,
>
>> Thanks to both of you for following up. Over the weekend, I switched to
>> using the initramfs within the kernel configuration (in the Freescale
>> kernel) and set the source directory to my rootfs that will be the
>> ramdrive and it worked great! So I'll stick with this scenario. It's
>> nice too in that the rootfs (a small one) gets bundled up with the
>> kernel (uImage) so its just one file. So it works out really nice.
>> This is a good way for upgrading firmware from the flash.
> Don't you want to check latest linux-next for the mx28 CPU?
>
>> Best,
>> Bill
>>
>> On 9/17/2012 4:44 PM, Fabio Estevam wrote:
>>> Bill,
>>>
>>> On Mon, Sep 17, 2012 at 6:31 PM, Marek Vasut<marex@denx.de> wrote:
>>>> Dear Bill,
>>>>
>>>> I'm CCing Fabio ... he might have some idea for you.
>>> What about starting a thread in linux-arm-kernel for this?
>>>
>>> Regards,
>>>
>>> Fabio Estevam
> Best regards,
> Marek Vasut
^ permalink raw reply [flat|nested] 11+ messages in thread
* [U-Boot] using initrd with U-boot on the imx28evk
2012-09-18 13:22 ` Bill
2012-09-18 13:36 ` Marek Vasut
@ 2012-09-18 17:27 ` Wolfgang Denk
1 sibling, 0 replies; 11+ messages in thread
From: Wolfgang Denk @ 2012-09-18 17:27 UTC (permalink / raw)
To: u-boot
Dear Bill,
In message <505875A7.3040001@techsi.com> you wrote:
> Thanks to both of you for following up. Over the weekend, I switched to
> using the initramfs within the kernel configuration (in the Freescale
> kernel) and set the source directory to my rootfs that will be the
> ramdrive and it worked great! So I'll stick with this scenario. It's
> nice too in that the rootfs (a small one) gets bundled up with the
> kernel (uImage) so its just one file. So it works out really nice.
> This is a good way for upgrading firmware from the flash.
Actually it's a way that is limited in many respects, and nearly
always there are better solutions. If just having one file is
important to you, there are other approaches to acchieve the same.
Using a FIT image with U-Boot would be a very flexible and powerful
way (see doc/uImage.FIT/*), but even a simple multi-file image would
do that, and probably better.
Best regards,
Wolfgang Denk
--
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
The human race is faced with a cruel choice: work or daytime tele-
vision.
^ permalink raw reply [flat|nested] 11+ messages in thread
end of thread, other threads:[~2012-09-18 17:27 UTC | newest]
Thread overview: 11+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2012-09-11 21:31 [U-Boot] using initrd with U-boot on the imx28evk Bill
2012-09-12 22:29 ` Marek Vasut
2012-09-12 23:26 ` Bill
2012-09-12 23:44 ` Marek Vasut
2012-09-13 14:32 ` Bill
2012-09-17 21:31 ` Marek Vasut
2012-09-17 21:44 ` Fabio Estevam
2012-09-18 13:22 ` Bill
2012-09-18 13:36 ` Marek Vasut
2012-09-18 14:16 ` Bill
2012-09-18 17:27 ` Wolfgang Denk
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