From: Stephen Warren swarren@nvidia.com
This implements the following:
part uuid mmc 0:1 -> print partition UUID part uuid mmc 0:1 uuid -> set environment variable to partition UUID part list mmc 0 -> list the partitions on the specified device
"part uuid" can be useful when writing a bootcmd which searches all known devices for something bootable, and then wants the kernel to use the same partition as the root device, e.g.:
part uuid ${devtype} ${devnum}:${rootpart} uuid setenv bootargs root=PARTUUID=${uuid} ...
Signed-off-by: Stephen Warren swarren@nvidia.com --- v3: * Rebased on top of u-boot/ext4 and Rob Herring's get_device_and_partition patches. * Implemented "part list" sub-command. v2: * validate that CONFIG_PARTITION_UUID is defined when CONFIG_CMD_PART is --- common/Makefile | 1 + common/cmd_part.c | 105 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 106 insertions(+), 0 deletions(-) create mode 100644 common/cmd_part.c
diff --git a/common/Makefile b/common/Makefile index 482795e..b56df1d 100644 --- a/common/Makefile +++ b/common/Makefile @@ -136,6 +136,7 @@ COBJS-$(CONFIG_CMD_NAND) += cmd_nand.o COBJS-$(CONFIG_CMD_NET) += cmd_net.o COBJS-$(CONFIG_CMD_ONENAND) += cmd_onenand.o COBJS-$(CONFIG_CMD_OTP) += cmd_otp.o +COBJS-$(CONFIG_CMD_PART) += cmd_part.o ifdef CONFIG_PCI COBJS-$(CONFIG_CMD_PCI) += cmd_pci.o endif diff --git a/common/cmd_part.c b/common/cmd_part.c new file mode 100644 index 0000000..d997597 --- /dev/null +++ b/common/cmd_part.c @@ -0,0 +1,105 @@ +/* + * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved. + * + * made from cmd_ext2, which was: + * + * (C) Copyright 2004 + * esd gmbh <www.esd-electronics.com> + * Reinhard Arlt reinhard.arlt@esd-electronics.com + * + * made from cmd_reiserfs by + * + * (C) Copyright 2003 - 2004 + * Sysgo Real-Time Solutions, AG <www.elinos.com> + * Pavel Bartusek pba@sysgo.com + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see http://www.gnu.org/licenses/. + */ + +#include <common.h> +#include <config.h> +#include <command.h> +#include <part.h> +#include <vsprintf.h> + +#ifndef CONFIG_PARTITION_UUIDS +#error CONFIG_PARTITION_UUIDS must be enabled for CONFIG_CMD_PART to be enabled +#endif + +int do_part_uuid(int argc, char * const argv[]) +{ + int part; + block_dev_desc_t *dev_desc; + disk_partition_t info; + + if (argc < 2) + return CMD_RET_USAGE; + if (argc > 3) + return CMD_RET_USAGE; + + part = get_device_and_partition(argv[0], argv[1], &dev_desc, &info, 0); + if (part < 0) + return 1; + + if (argc > 2) + setenv(argv[2], info.uuid); + else + printf("%s\n", info.uuid); + + return 0; +} + +int do_part_list(int argc, char * const argv[]) +{ + int ret; + block_dev_desc_t *desc; + + if (argc != 2) + return CMD_RET_USAGE; + + ret = get_device(argv[0], argv[1], &desc); + if (ret < 0) + return 1; + + print_part(desc); + + return 0; +} + +int do_part(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +{ + if (argc < 2) + return CMD_RET_USAGE; + + if (!strcmp(argv[1], "uuid")) + return do_part_uuid(argc - 2, argv + 2); + else if (!strcmp(argv[1], "list")) + return do_part_list(argc - 2, argv + 2); + + return CMD_RET_USAGE; +} + +U_BOOT_CMD( + part, 5, 1, do_part, + "disk partition related commands", + "part uuid <interface> <dev>:<part>\n" + " - print partition UUID\n" + "part uuid <interface> <dev>:<part> <varname>\n" + " - set environment variable to partition UUID\n" + "part list <interface> <dev>\n" + " - print a device's partition table" +);