Re: [U-Boot] using initrd with U-boot on the imx28evk
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 Vasutma...@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 ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Re: [U-Boot] using initrd with U-boot on the imx28evk
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 Vasutma...@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 ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Re: [U-Boot] using initrd with U-boot on the imx28evk
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 Vasutma...@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 ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Re: [U-Boot] using initrd with U-boot on the imx28evk
Dear Bill, In message 505875a7.3040...@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: w...@denx.de The human race is faced with a cruel choice: work or daytime tele- vision. ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Re: [U-Boot] using initrd with U-boot on the imx28evk
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=0x4300,40K 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 b3011024 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 0x4200 uimage fatload usb 0 0x4300 rootfs-initrd setenv bootargs console=ttyAM0,115200n8 debug root=/dev/ram rw ip=dhcp fec_mac= bootm 0x4200 0x4300 u-boot then starts booting with: ## Booting kernel from Legacy Image at 4200 ... 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 4300 ... 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: Entry Point: 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@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 b3011024 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 ( 0x4300) 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 ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Re: [U-Boot] using initrd with U-boot on the imx28evk
Bill, On Mon, Sep 17, 2012 at 6:31 PM, Marek Vasut ma...@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 ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Re: [U-Boot] using initrd with U-boot on the imx28evk
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=0x4300,40K 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 b3011024 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 0x4200 uimage fatload usb 0 0x4300 rootfs-initrd setenv bootargs console=ttyAM0,115200n8 debug root=/dev/ram rw ip=dhcp fec_mac= bootm 0x4200 0x4300 u-boot then starts booting with: ## Booting kernel from Legacy Image at 4200 ... 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 4300 ... 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: Entry Point: 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@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 b3011024 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 ( 0x4300) 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 bsou...@techsi.com Technical Support Inc. 11253 John Galt Blvd Omaha, NE 68137 www.techsi.com 8(a) SDB Certified, ISO 9001:2008 ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Re: [U-Boot] using initrd with U-boot on the imx28evk
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 ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Re: [U-Boot] using initrd with U-boot on the imx28evk
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 0x4200 uimage fatload usb 0 0x4300 rootfs-initrd setenv bootargs console=ttyAM0,115200n8 debug root=/dev/ram rw ip=dhcp fec_mac= bootm 0x4200 0x4300 u-boot then starts booting with: ## Booting kernel from Legacy Image at 4200 ... 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 4300 ... 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: Entry Point: 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@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 b3011024 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 ( 0x4300) 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 bsou...@techsi.com Technical Support Inc. 11253 John Galt Blvd Omaha, NE 68137 www.techsi.com 8(a) SDB Certified, ISO 9001:2008 ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Re: [U-Boot] using initrd with U-boot on the imx28evk
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 0x4200 uimage fatload usb 0 0x4300 rootfs-initrd setenv bootargs console=ttyAM0,115200n8 debug root=/dev/ram rw ip=dhcp fec_mac= bootm 0x4200 0x4300 u-boot then starts booting with: ## Booting kernel from Legacy Image at 4200 ... 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 4300 ... 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: Entry Point: 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@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 b3011024 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 ( 0x4300) 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 ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
[U-Boot] using initrd with U-boot on the imx28evk
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 ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
