u-boot.git/doc/README.ubi, branch next Unnamed repository; edit this file 'description' to name the repository. ubi: Add "skipcheck" command to set/clear this bit in the UBI volume hdr 2019-10-16T03:42:36+00:00 Stefan Roese sr@denx.de 2019-09-17T07:17:53+00:00 e6661cf767ce644e6ff835537449979859060c5b U-Boot now supports the "skip_check" flag to optionally skip the CRC check at open time. Currently its only possible to set this bit upon UBI volume creation. But it might be very useful to also set this bit on already installed systems (e.g. field upgrade) to make also use of the boot-time decrease on those systems. This patch now adds a new "ubi" command "ubi skipcheck" to set or clear this bit in the UBI volume header: => ubi skipcheck rootfs0 on Setting skip_check on volume rootfs0 BTW: This saves approx. 10 seconds Linux bootup time on a MT7688 based target with 128MiB of SPI NAND. Signed-off-by: Stefan Roese <sr@denx.de> Reviewed-by: Heiko Schocher <hs@denx.de> Cc: Quentin Schulz <quentin.schulz@bootlin.com> Cc: Boris Brezillon <boris.brezillon@collabora.com> Cc: Heiko Schocher <hs@denx.de> Cc: Andreas Dannenberg <dannenberg@ti.com> 
U-Boot now supports the "skip_check" flag to optionally skip the CRC
check at open time. Currently its only possible to set this bit upon
UBI volume creation. But it might be very useful to also set this bit
on already installed systems (e.g. field upgrade) to make also use of
the boot-time decrease on those systems.

This patch now adds a new "ubi" command "ubi skipcheck" to set or clear
this bit in the UBI volume header:

=> ubi skipcheck rootfs0 on
Setting skip_check on volume rootfs0

BTW: This saves approx. 10 seconds Linux bootup time on a MT7688 based
target with 128MiB of SPI NAND.

Signed-off-by: Stefan Roese <sr@denx.de>
Reviewed-by: Heiko Schocher <hs@denx.de>
Cc: Quentin Schulz <quentin.schulz@bootlin.com>
Cc: Boris Brezillon <boris.brezillon@collabora.com>
Cc: Heiko Schocher <hs@denx.de>
Cc: Andreas Dannenberg <dannenberg@ti.com>
Coding Style cleanup: replace leading SPACEs by TABs 2013-10-14T20:06:54+00:00 Wolfgang Denk wd@denx.de 2013-10-04T15:43:24+00:00 93e1459641e758d2b096d3f1b39414a39bb314f8 Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Drop changes for PEP 4 following python tools] Signed-off-by: Tom Rini <trini@ti.com> 
Signed-off-by: Wolfgang Denk <wd@denx.de>
[trini: Drop changes for PEP 4 following python tools]
Signed-off-by: Tom Rini <trini@ti.com>
cmd_ubi: add write.part command, to write a volume in multiple parts 2013-10-09T17:52:22+00:00 Paul Burton paul.burton@imgtec.com 2013-09-04T14:16:59+00:00 cc734f5ab26134e5e8d57c34edc257c89ac5b1d2 This allows you to write data to an UBI volume when the amount of memory available to write that data from is less than the total size of the data. For example, you may split a root filesystem UBIFS image into parts, provide the total size of the image to the first write.part command and then use multiple write.part commands to write the subsequent parts of the volume. This results in a sequence of commands akin to: ext4load mmc 0:1 0x80000000 rootfs.ubifs.0 ubi write.part 0x80000000 root 0x08000000 0x18000000 ext4load mmc 0:1 0x80000000 rootfs.ubifs.1 ubi write.part 0x80000000 root 0x08000000 ext4load mmc 0:1 0x80000000 rootfs.ubifs.2 ubi write.part 0x80000000 root 0x08000000 This would write 384MiB of data to the UBI volume 'root' whilst only requiring 128MiB of said data to be held in memory at a time. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Acked-by: Stefan Roese <sr@denx.de> 
This allows you to write data to an UBI volume when the amount of memory
available to write that data from is less than the total size of the
data. For example, you may split a root filesystem UBIFS image into
parts, provide the total size of the image to the first write.part
command and then use multiple write.part commands to write the
subsequent parts of the volume. This results in a sequence of commands
akin to:

  ext4load mmc 0:1 0x80000000 rootfs.ubifs.0
  ubi write.part 0x80000000 root 0x08000000 0x18000000
  ext4load mmc 0:1 0x80000000 rootfs.ubifs.1
  ubi write.part 0x80000000 root 0x08000000
  ext4load mmc 0:1 0x80000000 rootfs.ubifs.2
  ubi write.part 0x80000000 root 0x08000000

This would write 384MiB of data to the UBI volume 'root' whilst only
requiring 128MiB of said data to be held in memory at a time.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Acked-by: Stefan Roese <sr@denx.de>
doc/README.ubi: Add description of accessing ubi filesystems 2013-05-15T12:40:29+00:00 Paul B. Henson henson@acm.org 2013-05-08T17:08:10+00:00 cc63bb05ef271b3b63d9cd2fe1b52ff766d2fc65 Signed-off-by: "Paul B. Henson" <henson@acm.org> 
Signed-off-by: "Paul B. Henson" <henson@acm.org>
Add UBI README 2010-10-19T21:53:45+00:00 Stefan Roese sr@denx.de 2010-10-19T12:58:02+00:00 ae8082c7e0be9e31a70959a60d3f2ea70d4ecc70 This patch adds a small README to describe the usage of the U-Boot UBI commands. Signed-off-by: Stefan Roese <sr@denx.de> 
This patch adds a small README to describe the usage of the
U-Boot UBI commands.

Signed-off-by: Stefan Roese <sr@denx.de>