bootflow scan [-abelGH] [bootdev]
bootflow list [-e]
bootflow select [<num|name>]
- bootflow info [-d]
+ bootflow info [-ds]
+ bootflow read
bootflow boot
bootflow cmdline [set|get|clear|delete|auto] <param> [<value>]
Use the `-d` flag to dump out the contents of the bootfile file.
+The `-s` flag shows any x86 setup block, instead of the above.
+
+
+bootflow read
+~~~~~~~~~~~~~
+
+This reads any files related to the bootflow. Some bootflows with large files
+avoid doing this when the bootflow is scanned, since it uses a lot of memory
+and takes extra time. The files are then automatically read when `bootflow boot`
+is used.
+
+This command reads these files immediately. Typically this fills in the bootflow
+`buf` property, which can be used to examine the bootflow.
+
+Note that reading the files does not result in any extra parsing, nor loading of
+images in the files. This is purely used to read in the data ready for
+booting, or examination.
+
bootflow boot
~~~~~~~~~~~~~
-This boots the current bootflow.
+This boots the current bootflow, reading any required files first.
bootflow cmdline
[ 0.000000] Command line: loglevel=7 ... usb-storage.quirks=13fe:6500:u earlycon=uart8250,mmio32,0xfe03e000,115200n8
[ 0.000000] x86/split lock detection: warning about user-space split_locks
+This shows looking at x86 setup information::
+
+ => bootfl sel 0
+ => bootfl i -s
+ Setup located at 77b56010:
+
+ ACPI RSDP addr : 0
+ E820: 2 entries
+ Addr Size Type
+ 0 1000 RAM
+ fffff000 1000 Reserved
+ Setup sectors : 1e
+ Root flags : 1
+ Sys size : 63420
+ RAM size : 0
+ Video mode : ffff
+ Root dev : 0
+ Boot flag : 0
+ Jump : 66eb
+ Header : 53726448
+ Kernel V2
+ Version : 20d
+ Real mode switch : 0
+ Start sys seg : 1000
+ Kernel version : 38cc
+ @00003acc:
+ Type of loader : ff
+ unknown
+ Load flags : 1
+ : loaded-high
+ Setup move size : 8000
+ Code32 start : 100000
+ Ramdisk image : 0
+ Ramdisk size : 0
+ Bootsect kludge : 0
+ Heap end ptr : 5160
+ Ext loader ver : 0
+ Ext loader type : 0
+ Command line ptr : 735000
+ Initrd addr max : 7fffffff
+ Kernel alignment : 200000
+ Relocatable kernel : 1
+ Min alignment : 15
+ : 200000
+ Xload flags : 3
+ : 64-bit-entry can-load-above-4gb
+ Cmdline size : 7ff
+ Hardware subarch : 0
+ HW subarch data : 0
+ Payload offset : 26e
+ Payload length : 612045
+ Setup data : 0
+ Pref address : 1000000
+ Init size : 1383000
+ Handover offset : 0
+
+This shows reading a bootflow to examine the kernel::
+
+ => bootfl i 0
+ Name:
+ Device: emmc@1c,0.bootdev
+ Block dev: emmc@1c,0.blk
+ Method: cros
+ State: ready
+ Partition: 2
+ Subdir: (none)
+ Filename: <NULL>
+ Buffer: 0
+ Size: 63ee00 (6548992 bytes)
+ OS: ChromeOS
+ Cmdline: console= loglevel=7 init=/sbin/init cros_secure oops=panic panic=-1 root=PARTUUID=35c775e7-3735-d745-93e5-d9e0238f7ed0/PARTNROFF=1 rootwait rw dm_verity.error_behavior=3 dm_verity.max_bios=-1 dm_verity.dev_wait=0 dm="1 vroot none rw 1,0 3788800 verity payload=ROOT_DEV hashtree=HASH_DEV hashstart=3788800 alg=sha1 root_hexdigest=55052b629d3ac889f25a9583ea12cdcd3ea15ff8 salt=a2d4d9e574069f4fed5e3961b99054b7a4905414b60a25d89974a7334021165c" noinitrd vt.global_cursor_default=0 kern_guid=35c775e7-3735-d745-93e5-d9e0238f7ed0 add_efi_memmap boot=local noresume noswap i915.modeset=1 tpm_tis.force=1 tpm_tis.interrupts=0 nmi_watchdog=panic,lapic disablevmx=off
+ X86 setup: 77b56010
+ Logo: (none)
+ FDT: <NULL>
+ Error: 0
+
+Note that `Buffer` is 0 so it has not be read yet. Using `bootflow read`::
+
+ => bootfl read
+ => bootfl info
+ Name:
+ Device: emmc@1c,0.bootdev
+ Block dev: emmc@1c,0.blk
+ Method: cros
+ State: ready
+ Partition: 2
+ Subdir: (none)
+ Filename: <NULL>
+ Buffer: 77b7e400
+ Size: 63ee00 (6548992 bytes)
+ OS: ChromeOS
+ Cmdline: console= loglevel=7 init=/sbin/init cros_secure oops=panic panic=-1 root=PARTUUID=35c775e7-3735-d745-93e5-d9e0238f7ed0/PARTNROFF=1 rootwait rw dm_verity.error_behavior=3 dm_verity.max_bios=-1 dm_verity.dev_wait=0 dm="1 vroot none rw 1,0 3788800 verity payload=ROOT_DEV hashtree=HASH_DEV hashstart=3788800 alg=sha1 root_hexdigest=55052b629d3ac889f25a9583ea12cdcd3ea15ff8 salt=a2d4d9e574069f4fed5e3961b99054b7a4905414b60a25d89974a7334021165c" noinitrd vt.global_cursor_default=0 kern_guid=35c775e7-3735-d745-93e5-d9e0238f7ed0 add_efi_memmap boot=local noresume noswap i915.modeset=1 tpm_tis.force=1 tpm_tis.interrupts=0 nmi_watchdog=panic,lapic disablevmx=off
+ X86 setup: 781b4400
+ Logo: (none)
+ FDT: <NULL>
+ Error: 0
+
+Now the buffer can be accessed::
+
+ => md 77b7e400
+ 77b7e400: 1186f6fc 40000002 b8fa0c75 00000018 .......@u.......
+ 77b7e410: c08ed88e a68dd08e 000001e8 000000e8 ................
+ 77b7e420: ed815d00 00000021 62c280b8 89e80100 .]..!......b....
+ 77b7e430: 22f7e8c4 c0850061 22ec850f eb890061 ..."a......"a...
+ 77b7e440: 0230868b 01480000 21d0f7c3 00fb81c3 ..0...H....!....
+ 77b7e450: 7d010000 0000bb05 c3810100 00d4f000 ...}............
+ 77b7e460: 8130858d 85890061 00618132 3095010f ..0.a...2.a....0
+ 77b7e470: 0f006181 c883e020 e0220f20 e000bb8d .a.. ... .".....
+ 77b7e480: c0310062 001800b9 8dabf300 62e000bb b.1............b
+ 77b7e490: 07878d00 89000010 00bb8d07 8d0062f0 .............b..
+ 77b7e4a0: 00100787 0004b900 07890000 00100005 ................
+ 77b7e4b0: 08c78300 8df37549 630000bb 0183b800 ....Iu.....c....
+ 77b7e4c0: 00b90000 89000008 00000507 c7830020 ............ ...
+ 77b7e4d0: f3754908 e000838d 220f0062 0080b9d8 .Iu.....b.."....
+ 77b7e4e0: 320fc000 08e8ba0f c031300f b8d0000f ...2.....01.....
+ 77b7e4f0: 00000020 6ad8000f 00858d10 50000002 ......j.......P
Return value
git.openpandora.org / pandora-u-boot.git / blobdiff