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authorRajithaY <rajithax.yerrumsetty@intel.com>2017-04-25 03:31:15 -0700
committerRajitha Yerrumchetty <rajithax.yerrumsetty@intel.com>2017-05-22 06:48:08 +0000
commitbb756eebdac6fd24e8919e2c43f7d2c8c4091f59 (patch)
treeca11e03542edf2d8f631efeca5e1626d211107e3 /qemu/roms/u-boot/doc/README.ubi
parenta14b48d18a9ed03ec191cf16b162206998a895ce (diff)
Adding qemu as a submodule of KVMFORNFV
This Patch includes the changes to add qemu as a submodule to kvmfornfv repo and make use of the updated latest qemu for the execution of all testcase Change-Id: I1280af507a857675c7f81d30c95255635667bdd7 Signed-off-by:RajithaY<rajithax.yerrumsetty@intel.com>
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--------------------
-UBI usage in U-Boot
--------------------
-
-UBI support in U-Boot is broken down into five separate commands.
-The first is the ubi command, which has six subcommands:
-
-=> help ubi
-ubi - ubi commands
-
-Usage:
-ubi part [part] [offset]
- - Show or set current partition (with optional VID header offset)
-ubi info [l[ayout]] - Display volume and ubi layout information
-ubi create[vol] volume [size] [type] - create volume name with size
-ubi write[vol] address volume size - Write volume from address with size
-ubi write.part address volume size [fullsize]
- - Write part of a volume from address
-ubi read[vol] address volume [size] - Read volume to address with size
-ubi remove[vol] volume - Remove volume
-[Legends]
- volume: character name
- size: specified in bytes
- type: s[tatic] or d[ynamic] (default=dynamic)
-
-
-The first command that is needed to be issues is "ubi part" to connect
-one mtd partition to the UBI subsystem. This command will either create
-a new UBI device on the requested MTD partition. Or it will attach a
-previously created UBI device. The other UBI commands will only work
-when such a UBI device is attached (via "ubi part"). Here an example:
-
-=> mtdparts
-
-device nor0 <1fc000000.nor_flash>, # parts = 6
- #: name size offset mask_flags
- 0: kernel 0x00200000 0x00000000 0
- 1: dtb 0x00040000 0x00200000 0
- 2: root 0x00200000 0x00240000 0
- 3: user 0x01ac0000 0x00440000 0
- 4: env 0x00080000 0x01f00000 0
- 5: u-boot 0x00080000 0x01f80000 0
-
-active partition: nor0,0 - (kernel) 0x00200000 @ 0x00000000
-
-defaults:
-mtdids : nor0=1fc000000.nor_flash
-mtdparts: mtdparts=1fc000000.nor_flash:2m(kernel),256k(dtb),2m(root),27392k(user),512k(env),512k(u-boot)
-
-=> ubi part root
-Creating 1 MTD partitions on "nor0":
-0x000000240000-0x000000440000 : "mtd=2"
-UBI: attaching mtd1 to ubi0
-UBI: physical eraseblock size: 262144 bytes (256 KiB)
-UBI: logical eraseblock size: 262016 bytes
-UBI: smallest flash I/O unit: 1
-UBI: VID header offset: 64 (aligned 64)
-UBI: data offset: 128
-UBI: attached mtd1 to ubi0
-UBI: MTD device name: "mtd=2"
-UBI: MTD device size: 2 MiB
-UBI: number of good PEBs: 8
-UBI: number of bad PEBs: 0
-UBI: max. allowed volumes: 128
-UBI: wear-leveling threshold: 4096
-UBI: number of internal volumes: 1
-UBI: number of user volumes: 1
-UBI: available PEBs: 0
-UBI: total number of reserved PEBs: 8
-UBI: number of PEBs reserved for bad PEB handling: 0
-UBI: max/mean erase counter: 2/1
-
-
-Now that the UBI device is attached, this device can be modified
-using the following commands:
-
-ubi info Display volume and ubi layout information
-ubi createvol Create UBI volume on UBI device
-ubi removevol Remove UBI volume from UBI device
-ubi read Read data from UBI volume to memory
-ubi write Write data from memory to UBI volume
-ubi write.part Write data from memory to UBI volume, in parts
-
-
-Here a few examples on the usage:
-
-=> ubi create testvol
-Creating dynamic volume testvol of size 1048064
-
-=> ubi info l
-UBI: volume information dump:
-UBI: vol_id 0
-UBI: reserved_pebs 4
-UBI: alignment 1
-UBI: data_pad 0
-UBI: vol_type 3
-UBI: name_len 7
-UBI: usable_leb_size 262016
-UBI: used_ebs 4
-UBI: used_bytes 1048064
-UBI: last_eb_bytes 262016
-UBI: corrupted 0
-UBI: upd_marker 0
-UBI: name testvol
-
-UBI: volume information dump:
-UBI: vol_id 2147479551
-UBI: reserved_pebs 2
-UBI: alignment 1
-UBI: data_pad 0
-UBI: vol_type 3
-UBI: name_len 13
-UBI: usable_leb_size 262016
-UBI: used_ebs 2
-UBI: used_bytes 524032
-UBI: last_eb_bytes 2
-UBI: corrupted 0
-UBI: upd_marker 0
-UBI: name layout volume
-
-=> ubi info
-UBI: MTD device name: "mtd=2"
-UBI: MTD device size: 2 MiB
-UBI: physical eraseblock size: 262144 bytes (256 KiB)
-UBI: logical eraseblock size: 262016 bytes
-UBI: number of good PEBs: 8
-UBI: number of bad PEBs: 0
-UBI: smallest flash I/O unit: 1
-UBI: VID header offset: 64 (aligned 64)
-UBI: data offset: 128
-UBI: max. allowed volumes: 128
-UBI: wear-leveling threshold: 4096
-UBI: number of internal volumes: 1
-UBI: number of user volumes: 1
-UBI: available PEBs: 0
-UBI: total number of reserved PEBs: 8
-UBI: number of PEBs reserved for bad PEB handling: 0
-UBI: max/mean erase counter: 4/1
-
-=> ubi write 800000 testvol 80000
-Volume "testvol" found at volume id 0
-
-=> ubi read 900000 testvol 80000
-Volume testvol found at volume id 0
-read 524288 bytes from volume 0 to 900000(buf address)
-
-=> cmp.b 800000 900000 80000
-Total of 524288 bytes were the same
-
-
-Next, the ubifsmount command allows you to access filesystems on the
-UBI partition which has been attached with the ubi part command:
-
-=> help ubifsmount
-ubifsmount - mount UBIFS volume
-
-Usage:
-ubifsmount <volume-name>
- - mount 'volume-name' volume
-
-For example:
-
-=> ubifsmount ubi0:recovery
-UBIFS: mounted UBI device 0, volume 0, name "recovery"
-UBIFS: mounted read-only
-UBIFS: file system size: 46473216 bytes (45384 KiB, 44 MiB, 366 LEBs)
-UBIFS: journal size: 6348800 bytes (6200 KiB, 6 MiB, 50 LEBs)
-UBIFS: media format: w4/r0 (latest is w4/r0)
-UBIFS: default compressor: LZO
-UBIFS: reserved for root: 0 bytes (0 KiB)
-
-Note that unlike Linux, U-Boot can only have one active UBI partition
-at a time, which can be referred to as ubi0, and must be supplied along
-with the name of the filesystem you are mounting.
-
-
-Once a UBI filesystem has been mounted, the ubifsls command allows you
-to list the contents of a directory in the filesystem:
-
-
-=> help ubifsls
-ubifsls - list files in a directory
-
-Usage:
-ubifsls [directory]
- - list files in a 'directory' (default '/')
-
-For example:
-
-=> ubifsls
- 17442 Thu Jan 01 02:57:38 1970 imx28-evk.dtb
- 2998146 Thu Jan 01 02:57:43 1970 zImage
-
-
-And the ubifsload command allows you to load a file from a UBI
-filesystem:
-
-
-=> help ubifsload
-ubifsload - load file from an UBIFS filesystem
-
-Usage:
-ubifsload <addr> <filename> [bytes]
- - load file 'filename' to address 'addr'
-
-For example:
-
-=> ubifsload ${loadaddr} zImage
-Loading file 'zImage' to addr 0x42000000 with size 2998146 (0x002dbf82)...
-Done
-
-
-Finally, you can unmount the UBI filesystem with the ubifsumount
-command:
-
-=> help ubifsumount
-ubifsumount - unmount UBIFS volume
-
-Usage:
-ubifsumount - unmount current volume
-
-For example:
-
-=> ubifsumount
-Unmounting UBIFS volume recovery!