path: root/disk
diff options
authorPatrick Delaunay <>2015-11-17 11:36:52 +0100
committerTom Rini <>2015-11-23 11:01:52 -0500
commitcfdaf4caa250a4bc3de41f47147715e8a81be5a2 (patch)
tree5a7478df21f23da9ff986f026088e98610b887e1 /disk
parentbbb9ffac6066c708bc764e6603e6a54c4c7bb995 (diff)
part:efi: add bootable parameter in gpt command
The optional parameter bootable is added in gpt command to set the partition attribute flag "Legacy BIOS bootable" This flag is used in extlinux and so in with distro to select the boot partition where is located the configuration file (please check out doc/README.distro for details). With this parameter, U-Boot can be used to create the boot partition needed for device using distro. example of use: setenv partitions "name=u-boot,size=60MiB;name=boot,size=60Mib,bootable;\ name=rootfs,size=0" > gpt write mmc 0 $partitions > part list mmc 0 Partition Map for MMC device 0 -- Partition Type: EFI Part Start LBA End LBA Name Attributes Type GUID Partition GUID 1 0x00000022 0x0001e021 "u-boot" attrs: 0x0000000000000000 type: ebd0a0a2-b9e5-4433-87c0-68b6b72699c7 guid: cceb0b18-39cb-d547-9db7-03b405fa77d4 2 0x0001e022 0x0003c021 "boot" attrs: 0x0000000000000004 type: ebd0a0a2-b9e5-4433-87c0-68b6b72699c7 guid: d4981a2b-0478-544e-9607-7fd3c651068d 3 0x0003c022 0x003a9fde "rootfs" attrs: 0x0000000000000000 type: ebd0a0a2-b9e5-4433-87c0-68b6b72699c7 guid: 6d6c9a36-e919-264d-a9ee-bd00379686c7 > part list mmc 0 -bootable devplist > printenv devplist devplist=2 Then the distro scripts will search extlinux in partition 2 and not in the first partition. Signed-off-by: Patrick Delaunay <>
Diffstat (limited to 'disk')
1 files changed, 3 insertions, 0 deletions
diff --git a/disk/part_efi.c b/disk/part_efi.c
index 40f0b361b4..b1e01558a6 100644
--- a/disk/part_efi.c
+++ b/disk/part_efi.c
@@ -493,6 +493,9 @@ int gpt_fill_pte(gpt_header *gpt_h, gpt_entry *gpt_e,
memset(&gpt_e[i].attributes, 0,
+ if (partitions[i].bootable)
+ gpt_e[i].attributes.fields.legacy_bios_bootable = 1;
/* partition name */
efiname_len = sizeof(gpt_e[i].partition_name)
/ sizeof(efi_char16_t);
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