Add information on type partition, copied from README.gpt.
I also correct issue for gpt_parts variable and add example of
"gpt read" usage.
Signed-off-by: Patrick Delaunay <patrick.delau...@foss.st.com>
---
doc/usage/cmd/gpt.rst | 93 ++++++++++++++++++++++++++++++++++++++-----
1 file changed, 84 insertions(+), 9 deletions(-)
diff --git a/doc/usage/cmd/gpt.rst b/doc/usage/cmd/gpt.rst
index 8534f78cbac0..13e8783be9b8 100644
--- a/doc/usage/cmd/gpt.rst
+++ b/doc/usage/cmd/gpt.rst
@@ -54,7 +54,7 @@ partition string
* name=<NAME> - The partition name, required
* start=<BYTES> - The partition start offset in bytes, required
- * size=<BYTES> - The partition size in bytes or "-" to expand it to the
whole free area
+ * size=<BYTES> - The partition size in bytes or "-" for the last partition
to expand it to the whole free area
* bootable - Set the legacy bootable flag
* uuid=<UUID> - The partition UUID, optional if CONFIG_RANDOM_UUID=y is
enabled
* type=<UUID> - The partition type GUID, requires
CONFIG_PARTITION_TYPE_GUID=y
@@ -63,6 +63,23 @@ partition string
If 'uuid' is not specified, but CONFIG_RANDOM_UUID is enabled, a random
UUID
will be generated for the partition
+ If 'type' is not specified or without CONFIG_PARTITION_TYPE_GUID=y,
+ the used partition type GUID is PARTITION_BASIC_DATA_GUID.
+
+ Some strings can be also used at the place of the known partition type
GUID:
+ * "mbr" = LEGACY_MBR_PARTITION_GUID
(024DEE41-33E7-11D3-9D69-0008C781F39F)
+ * "msft" = PARTITION_MSFT_RESERVED_GUID
(E3C9E316-0B5C-4DB8-817D-F92DF00215AE)
+ * "data" = PARTITION_BASIC_DATA_GUID
(EBD0A0A2-B9E5-4433-87C0-68B6B72699C7)
+ * "linux" = PARTITION_LINUX_FILE_SYSTEM_DATA_GUID
(0FC63DAF-8483-4772-8E79-3D69D8477DE4)
+ * "raid" = PARTITION_LINUX_RAID_GUID
(A19D880F-05FC-4D3B-A006-743F0F84911E)
+ * "swap" = PARTITION_LINUX_SWAP_GUID
(0657FD6D-A4AB-43C4-84E5-0933C84B4F4F)
+ * "lvm" = PARTITION_LINUX_LVM_GUID
(E6D6D379-F507-44C2-A23C-238F2A3DF928)
+ * "u-boot-env" =
PARTITION_U_BOOT_ENVIRONMENT(3DE21764-95BD-54BD-A5C3-4ABE786F38A8)
+ * "system" = PARTITION_SYSTEM_GUID
(C12A7328-F81F-11D2-BA4B-00A0C93EC93B)
+
+ The GPT partitions layout and associated 'type' are also printed with the
+ :doc:`part command <part>` command by typing "part list".
+
gpt enumerate
~~~~~~~~~~~~~
@@ -162,16 +179,17 @@ Examples
Create 6 partitions on a disk::
- => setenv gpt_parts 'uuid_disk=bec9fc2a-86c1-483d-8a0e-0109732277d7;
-
name=boot,start=4M,size=128M,bootable,type=ebd0a0a2-b9e5-4433-87c0-68b6b72699c7,
- name=rootfs,size=3072M,type=0fc63daf-8483-4772-8e79-3d69d8477de4;
- name=system-data,size=512M,type=0fc63daf-8483-4772-8e79-3d69d8477de4;
- name=[ext],size=-,type=0fc63daf-8483-4772-8e79-3d69d8477de4;
- name=user,size=-,type=0fc63daf-8483-4772-8e79-3d69d8477de4;
- name=modules,size=100M,type=0fc63daf-8483-4772-8e79-3d69d8477de4;
- name=ramdisk,size=8M,type=0fc63daf-8483-4772-8e79-3d69d8477de4
+ => setenv gpt_parts 'uuid_disk=bec9fc2a-86c1-483d-8a0e-0109732277d7;\
+
name=boot,start=4M,size=128M,bootable,type=ebd0a0a2-b9e5-4433-87c0-68b6b72699c7;\
+ name=rootfs,size=3072M,type=0fc63daf-8483-4772-8e79-3d69d8477de4;\
+ name=system-data,size=512M,type=0fc63daf-8483-4772-8e79-3d69d8477de4;\
+ name=user,size=512M,type=0fc63daf-8483-4772-8e79-3d69d8477de4;\
+ name=modules,size=100M,type=0fc63daf-8483-4772-8e79-3d69d8477de4;\
+ name=ramdisk,size=8M,type=0fc63daf-8483-4772-8e79-3d69d8477de4;\
+ name=[ext],size=-,type=0fc63daf-8483-4772-8e79-3d69d8477de4'
=> gpt write mmc 0 $gpt_parts
+Last partition "[ext]" with '-' is extended up to the end of the disk
Verify that the device matches the partition layout described in the variable
$gpt_parts::
@@ -228,3 +246,60 @@ Swap the order of the 'boot' and 'rootfs' partition table
entries::
=> gpt setenv mmc 0 boot
=> echo ${gpt_partition_entry}
2
+
+Other example: a disk with known partition types::
+
+ => setenv gpt_parts 'name=u-boot,size=32M,type=data;\
+ name=env,size=1M,type=u-boot-env;
+ name=ESP,size=128M,type=system;
+ name=rootfs,size=3072M,type=linux;
+ name=swap,size=100M,type=swap;
+ name=user,size=-,type=linux'
+ => gpt write mmc 0 $gpt_parts
+
+ => 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 0x00010021 "u-boot"
+ attrs: 0x0000000000000000
+ type: ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
+ (data)
+ guid: 502d48f6-81c0-488f-bdc0-ad602498f3ce
+ 2 0x00010022 0x00010821 "env"
+ attrs: 0x0000000000000000
+ type: 3de21764-95bd-54bd-a5c3-4abe786f38a8
+ (u-boot-env)
+ guid: 9dc62338-459a-485e-bd8f-b3fbf728d9c0
+ 3 0x00010822 0x00050821 "ESP"
+ attrs: 0x0000000000000000
+ type: c12a7328-f81f-11d2-ba4b-00a0c93ec93b
+ (EFI System Partition)
+ guid: 8a3a1168-6af8-4ba7-a95d-9cd0d14e1b3d
+ 4 0x00050822 0x00650821 "rootfs"
+ attrs: 0x0000000000000000
+ type: 0fc63daf-8483-4772-8e79-3d69d8477de4
+ (linux)
+ guid: 411ffebc-8a19-469d-99a9-0982409a6851
+ 5 0x00650822 0x00682821 "swap"
+ attrs: 0x0000000000000000
+ type: 0657fd6d-a4ab-43c4-84e5-0933c84b4f4f
+ (swap)
+ guid: f8ec0410-95ec-4e3e-8b98-fb8cf271a201
+ 6 0x00682822 0x01dacbde "user"
+ attrs: 0x0000000000000000
+ type: 0fc63daf-8483-4772-8e79-3d69d8477de4
+ (linux)
+ guid: c5543e1c-566d-4502-99ad-20545007e673
+
+Modifying GPT partition layout from U-Boot::
+
+ => gpt read mmc 0 current_partitions
+ => env edit current_partitions
+ edit: uuid_disk=[...];name=part1,start=0x4000,size=0x4000,uuid=[...];
+ name=part2,start=0xc000,size=0xc000,uuid=[...];[ . . . ]
+
+ => gpt write mmc 0 $current_partitions
+ => gpt verify mmc 0 $current_partitions
--
2.25.1
