[U-Boot] [PATCH v7 2/7] cmd: add efidebug command
Heinrich Schuchardt
xypron.glpk at gmx.de
Fri Feb 22 02:43:31 UTC 2019
On 2/22/19 2:04 AM, AKASHI Takahiro wrote:
> On Thu, Feb 21, 2019 at 08:24:21PM +0100, Heinrich Schuchardt wrote:
>> On 2/21/19 7:26 AM, AKASHI Takahiro wrote:
>>> Currently, there is no easy way to add or modify UEFI variables.
>>> In particular, bootmgr supports BootOrder/BootXXXX variables, it is
>>> quite hard to define them as u-boot variables because they are represented
>>> in a complicated and encoded format.
>>>
>>> The new command, efidebug, helps address these issues and give us
>>> more friendly interfaces:
>>> * efidebug boot add: add BootXXXX variable
>>> * efidebug boot rm: remove BootXXXX variable
>>> * efidebug boot dump: display all BootXXXX variables
>>> * efidebug boot next: set BootNext variable
>>> * efidebug boot order: set/display a boot order (BootOrder)
>>>
>>> Signed-off-by: AKASHI Takahiro <takahiro.akashi at linaro.org>
>>> ---
>>> MAINTAINERS | 1 +
>>> cmd/Kconfig | 10 +
>>> cmd/Makefile | 1 +
>>> cmd/efidebug.c | 578 +++++++++++++++++++++++++++++++++++++++++++++++++
>>> 4 files changed, 590 insertions(+)
>>> create mode 100644 cmd/efidebug.c
>>>
>>> diff --git a/MAINTAINERS b/MAINTAINERS
>>> index 0cce9db2660e..4fabb75eda37 100644
>>> --- a/MAINTAINERS
>>> +++ b/MAINTAINERS
>>> @@ -471,6 +471,7 @@ F: lib/efi*/
>>> F: test/py/tests/test_efi*
>>> F: test/unicode_ut.c
>>> F: cmd/bootefi.c
>>> +F: cmd/efidebug.c
>>> F: cmd/nvedit_efi.c
>>> F: tools/file2include.c
>>>
>>> diff --git a/cmd/Kconfig b/cmd/Kconfig
>>> index ddcdee44538d..88b086b074be 100644
>>> --- a/cmd/Kconfig
>>> +++ b/cmd/Kconfig
>>> @@ -1407,6 +1407,16 @@ config CMD_DISPLAY
>>> displayed on a simple board-specific display. Implement
>>> display_putc() to use it.
>>>
>>> +config CMD_EFIDEBUG
>>> + bool "efidebug - display/configure UEFI environment"
>>> + depends on EFI_LOADER
>>> + default n
>>> + help
>>> + Enable the 'efidebug' command which provides a subset of UEFI
>>> + shell utility with simplified functionality. It will be useful
>>> + particularly for managing boot parameters as well as examining
>>> + various EFI status for debugging.
>>> +
>>> config CMD_LED
>>> bool "led"
>>> default y if LED
>>> diff --git a/cmd/Makefile b/cmd/Makefile
>>> index b9ee51869d48..acb85f49fba8 100644
>>> --- a/cmd/Makefile
>>> +++ b/cmd/Makefile
>>> @@ -51,6 +51,7 @@ obj-$(CONFIG_CMD_ECHO) += echo.o
>>> obj-$(CONFIG_ENV_IS_IN_EEPROM) += eeprom.o
>>> obj-$(CONFIG_CMD_EEPROM) += eeprom.o
>>> obj-$(CONFIG_EFI_STUB) += efi.o
>>> +obj-$(CONFIG_CMD_EFIDEBUG) += efidebug.o
>>> obj-$(CONFIG_CMD_ELF) += elf.o
>>> obj-$(CONFIG_HUSH_PARSER) += exit.o
>>> obj-$(CONFIG_CMD_EXT4) += ext4.o
>>> diff --git a/cmd/efidebug.c b/cmd/efidebug.c
>>> new file mode 100644
>>> index 000000000000..641ec98a4d32
>>> --- /dev/null
>>> +++ b/cmd/efidebug.c
>>> @@ -0,0 +1,578 @@
>>> +// SPDX-License-Identifier: GPL-2.0+
>>> +/*
>>> + * UEFI Shell-like command
>>> + *
>>> + * Copyright (c) 2018 AKASHI Takahiro, Linaro Limited
>>> + */
>>> +
>>> +#include <charset.h>
>>> +#include <common.h>
>>> +#include <command.h>
>>> +#include <efi_loader.h>
>>> +#include <environment.h>
>>> +#include <exports.h>
>>> +#include <malloc.h>
>>> +#include <search.h>
>>> +#include <linux/ctype.h>
>>> +
>>> +/**
>>> + * do_efi_boot_add() - set UEFI boot option
>>> + *
>>> + * @cmdtp: Command table
>>> + * @flag: Command flag
>>> + * @argc: Number of arguments
>>> + * @argv: Argument array
>>> + * Return: CMD_RET_SUCCESS on success,
>>> + * CMD_RET_USAGE or CMD_RET_RET_FAILURE on failure
>>> + *
>>> + * Implement efidebug "boot add" sub-command.
>>> + * Create or change UEFI boot option.
>>> + * - boot add <id> <label> <interface> <devnum>[:<part>] <file> <options>
>>> + */
>>> +static int do_efi_boot_add(cmd_tbl_t *cmdtp, int flag,
>>> + int argc, char * const argv[])
>>> +{
>>> + int id;
>>> + char *endp;
>>> + char var_name[9];
>>> + u16 var_name16[9], *p;
>>> + efi_guid_t guid;
>>> + size_t label_len, label_len16;
>>> + u16 *label;
>>> + struct efi_device_path *device_path = NULL, *file_path = NULL;
>>> + struct efi_load_option lo;
>>> + void *data = NULL;
>>> + efi_uintn_t size;
>>> + int ret;
>>> +
>>> + if (argc < 6 || argc > 7)
>>> + return CMD_RET_USAGE;
>>> +
>>> + id = (int)simple_strtoul(argv[1], &endp, 16);
>>> + if (*endp != '\0' || id > 0xffff)
>>> + return CMD_RET_FAILURE;
>>> +
>>> + sprintf(var_name, "Boot%04X", id);
>>> + p = var_name16;
>>> + utf8_utf16_strncpy(&p, var_name, 9);
>>> +
>>> + guid = efi_global_variable_guid;
>>> +
>>> + /* attributes */
>>> + lo.attributes = 0x1; /* always ACTIVE */
>>
>> I would prefer the usage of a constant.
>>
>> We should move the definitions from lib/efi_loader/efi_bootmgr.c to
>> efi_api.h:
>
> Okay, but in efi_loader.h as struct efi_load_option is defined there.
struct efi_load_option is nothing that is defined in the UEFI spec but a
U-Boot specific structure (it is not the same as EFI_LOAD_OPTION).
The constants are defined in the UEFI spec.
To my understanding we are using efi_loader only for U-Boot specific
stuff up to now.
Best regards
Heinrich
>
>> #define LOAD_OPTION_ACTIVE 0x00000001
>> #define LOAD_OPTION_FORCE_RECONNECT 0x00000002
>> #define LOAD_OPTION_HIDDEN 0x00000008
>>
>> And add the missing values:
>>
>> #define LOAD_OPTION_CATEGORY 0x00001F00
>> #define LOAD_OPTION_CATEGORY_BOOT 0x00000000
>> #define LOAD_OPTION_CATEGORY_APP 0x00000100
>>
>>> +
>>> + /* label */
>>> + label_len = strlen(argv[2]);
>>> + label_len16 = utf8_utf16_strnlen(argv[2], label_len);
>>> + label = malloc((label_len16 + 1) * sizeof(u16));
>>> + if (!label)
>>> + return CMD_RET_FAILURE;
>>> + lo.label = label; /* label will be changed below */
>>> + utf8_utf16_strncpy(&label, argv[2], label_len);
>>> +
>>> + /* file path */
>>> + ret = efi_dp_from_name(argv[3], argv[4], argv[5], &device_path,
>>> + &file_path);
>>> + if (ret != EFI_SUCCESS) {
>>> + printf("Cannot create device path for \"%s %s\"\n",
>>> + argv[3], argv[4]);
>>> + ret = CMD_RET_FAILURE;
>>> + goto out;
>>> + }
>>> + lo.file_path = file_path;
>>> + lo.file_path_length = efi_dp_size(file_path)
>>> + + sizeof(struct efi_device_path); /* for END */
>>> +
>>> + /* optional data */
>>> + lo.optional_data = (u8 *)(argc == 6 ? "" : argv[6]);
>>> +
>>> + size = efi_serialize_load_option(&lo, (u8 **)&data);
>>> + if (!size) {
>>> + ret = CMD_RET_FAILURE;
>>> + goto out;
>>> + }
>>> +
>>> + ret = efi_set_variable(var_name16, &guid,
>>> + EFI_VARIABLE_BOOTSERVICE_ACCESS |
>>> + EFI_VARIABLE_RUNTIME_ACCESS, size, data);
>>> + ret = (ret == EFI_SUCCESS ? CMD_RET_SUCCESS : CMD_RET_FAILURE);
>>> +out:
>>> + free(data);
>>> + efi_free_pool(device_path);
>>> + efi_free_pool(file_path);
>>> + free(lo.label);
>>> +
>>> + return ret;
>>> +}
>>> +
>>> +/**
>>> + * do_efi_boot_rm() - delete UEFI boot options
>>> + *
>>> + * @cmdtp: Command table
>>> + * @flag: Command flag
>>> + * @argc: Number of arguments
>>> + * @argv: Argument array
>>> + * Return: CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
>>> + *
>>> + * Implement efidebug "boot rm" sub-command.
>>> + * Delete UEFI boot options.
>>> + * - boot rm <id> ...
>>> + */
>>> +static int do_efi_boot_rm(cmd_tbl_t *cmdtp, int flag,
>>> + int argc, char * const argv[])
>>> +{
>>> + efi_guid_t guid;
>>> + int id, i;
>>> + char *endp;
>>> + char var_name[9];
>>> + u16 var_name16[9];
>>> + efi_status_t ret;
>>> +
>>> + if (argc == 1)
>>> + return CMD_RET_USAGE;
>>> +
>>> + guid = efi_global_variable_guid;
>>> + for (i = 1; i < argc; i++, argv++) {
>>> + id = (int)simple_strtoul(argv[1], &endp, 16);
>>> + if (*endp != '\0' || id > 0xffff)
>>> + return CMD_RET_FAILURE;
>>> +
>>> + sprintf(var_name, "Boot%04X", id);
>>> + utf8_utf16_strncpy((u16 **)&var_name16, var_name, 9);
>>> +
>>> + ret = efi_set_variable(var_name16, &guid, 0, 0, NULL);
>>> + if (ret) {
>>> + printf("cannot remove Boot%04X", id);
>>> + return CMD_RET_FAILURE;
>>> + }
>>> + }
>>> +
>>> + return CMD_RET_SUCCESS;
>>> +}
>>> +
>>> +/**
>>> + * show_efi_boot_opt_data() - dump UEFI boot option
>>> + *
>>> + * @id: Boot opton number
>>> + * @data: Value of UEFI boot option variable
>>> + *
>>> + * Decode the value of UEFI boot option variable and print information.
>>> + */
>>> +static void show_efi_boot_opt_data(int id, void *data)
>>> +{
>>> + struct efi_load_option lo;
>>> + char *label, *p;
>>> + size_t label_len16, label_len;
>>> + u16 *dp_str;
>>> +
>>> + efi_deserialize_load_option(&lo, data);
>>> +
>>> + label_len16 = u16_strlen(lo.label);
>>> + label_len = utf16_utf8_strnlen(lo.label, label_len16);
>>> + label = malloc(label_len + 1);
>>> + if (!label)
>>> + return;
>>> + p = label;
>>> + utf16_utf8_strncpy(&p, lo.label, label_len16);
>>> +
>>> + printf("Boot%04X:\n", id);
>>> + printf("\tattributes: %c%c%c (0x%08x)\n",
>>> + /* ACTIVE */
>>> + lo.attributes & 0x1 ? 'A' : '-',
>>
>> Please, use constants here.
>
> Okay.
>
>>> + /* FORCE RECONNECT */
>>> + lo.attributes & 0x2 ? 'R' : '-',
>>> + /* HIDDEN */
>>> + lo.attributes & 0x8 ? 'H' : '-',
>>> + lo.attributes);
>>
>> How about LOAD_OPTION_CATEGORY_APP?
>> It is not supported by us yet. So it is not strictly necessary now.
>
> Next time when "boot menu" or "hot key" will be supported.
>
> Thanks,
> -Takahiro Akashi
>
>> Otherwise
>>
>> Reviewed-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
>>
>>
>>> + printf("\tlabel: %s\n", label);
>>> +
>>> + dp_str = efi_dp_str(lo.file_path);
>>> + printf("\tfile_path: %ls\n", dp_str);
>>> + efi_free_pool(dp_str);
>>> +
>>> + printf("\tdata: %s\n", lo.optional_data);
>>> +
>>> + free(label);
>>> +}
>>> +
>>> +/**
>>> + * show_efi_boot_opt() - dump UEFI boot option
>>> + *
>>> + * @id: Boot opton number
>>> + *
>>> + * Dump information defined by UEFI boot option.
>>> + */
>>> +static void show_efi_boot_opt(int id)
>>> +{
>>> + char var_name[9];
>>> + u16 var_name16[9], *p;
>>> + efi_guid_t guid;
>>> + void *data = NULL;
>>> + efi_uintn_t size;
>>> + int ret;
>>> +
>>> + sprintf(var_name, "Boot%04X", id);
>>> + p = var_name16;
>>> + utf8_utf16_strncpy(&p, var_name, 9);
>>> + guid = efi_global_variable_guid;
>>> +
>>> + size = 0;
>>> + ret = efi_get_variable(var_name16, &guid, NULL, &size, NULL);
>>> + if (ret == (int)EFI_BUFFER_TOO_SMALL) {
>>> + data = malloc(size);
>>> + ret = efi_get_variable(var_name16, &guid, NULL, &size, data);
>>> + }
>>> + if (ret == EFI_SUCCESS)
>>> + show_efi_boot_opt_data(id, data);
>>> + else if (ret == EFI_NOT_FOUND)
>>> + printf("Boot%04X: not found\n", id);
>>> +
>>> + free(data);
>>> +}
>>> +
>>> +/**
>>> + * show_efi_boot_dump() - dump all UEFI boot options
>>> + *
>>> + * @cmdtp: Command table
>>> + * @flag: Command flag
>>> + * @argc: Number of arguments
>>> + * @argv: Argument array
>>> + * Return: CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
>>> + *
>>> + * Implement efidebug "boot dump" sub-command.
>>> + * Dump information of all UEFI boot options defined.
>>> + * - boot dump
>>> + */
>>> +static int do_efi_boot_dump(cmd_tbl_t *cmdtp, int flag,
>>> + int argc, char * const argv[])
>>> +{
>>> + char regex[256];
>>> + char * const regexlist[] = {regex};
>>> + char *variables = NULL, *boot, *value;
>>> + int len;
>>> + int id;
>>> +
>>> + if (argc > 1)
>>> + return CMD_RET_USAGE;
>>> +
>>> + snprintf(regex, 256, "efi_.*-.*-.*-.*-.*_Boot[0-9A-F]+");
>>> +
>>> + /* TODO: use GetNextVariableName? */
>>> + len = hexport_r(&env_htab, '\n', H_MATCH_REGEX | H_MATCH_KEY,
>>> + &variables, 0, 1, regexlist);
>>> +
>>> + if (!len)
>>> + return CMD_RET_SUCCESS;
>>> +
>>> + if (len < 0)
>>> + return CMD_RET_FAILURE;
>>> +
>>> + boot = variables;
>>> + while (*boot) {
>>> + value = strstr(boot, "Boot") + 4;
>>> + id = (int)simple_strtoul(value, NULL, 16);
>>> + show_efi_boot_opt(id);
>>> + boot = strchr(boot, '\n');
>>> + if (!*boot)
>>> + break;
>>> + boot++;
>>> + }
>>> + free(variables);
>>> +
>>> + return CMD_RET_SUCCESS;
>>> +}
>>> +
>>> +/**
>>> + * show_efi_boot_order() - show order of UEFI boot options
>>> + *
>>> + * Return: CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
>>> + *
>>> + * Show order of UEFI boot options defined by BootOrder variable.
>>> + */
>>> +static int show_efi_boot_order(void)
>>> +{
>>> + efi_guid_t guid;
>>> + u16 *bootorder = NULL;
>>> + efi_uintn_t size;
>>> + int num, i;
>>> + char var_name[9];
>>> + u16 var_name16[9], *p16;
>>> + void *data;
>>> + struct efi_load_option lo;
>>> + char *label, *p;
>>> + size_t label_len16, label_len;
>>> + efi_status_t ret;
>>> +
>>> + guid = efi_global_variable_guid;
>>> + size = 0;
>>> + ret = efi_get_variable(L"BootOrder", &guid, NULL, &size, NULL);
>>> + if (ret == EFI_BUFFER_TOO_SMALL) {
>>> + bootorder = malloc(size);
>>> + ret = efi_get_variable(L"BootOrder", &guid, NULL, &size,
>>> + bootorder);
>>> + }
>>> + if (ret == EFI_NOT_FOUND) {
>>> + printf("BootOrder not defined\n");
>>> + ret = CMD_RET_SUCCESS;
>>> + goto out;
>>> + } else if (ret != EFI_SUCCESS) {
>>> + ret = CMD_RET_FAILURE;
>>> + goto out;
>>> + }
>>> +
>>> + num = size / sizeof(u16);
>>> + for (i = 0; i < num; i++) {
>>> + sprintf(var_name, "Boot%04X", bootorder[i]);
>>> + p16 = var_name16;
>>> + utf8_utf16_strncpy(&p16, var_name, 9);
>>> +
>>> + size = 0;
>>> + ret = efi_get_variable(var_name16, &guid, NULL, &size, NULL);
>>> + if (ret != EFI_BUFFER_TOO_SMALL) {
>>> + printf("%2d: Boot%04X: (not defined)\n",
>>> + i + 1, bootorder[i]);
>>> + continue;
>>> + }
>>> +
>>> + data = malloc(size);
>>> + if (!data) {
>>> + ret = CMD_RET_FAILURE;
>>> + goto out;
>>> + }
>>> + ret = efi_get_variable(var_name16, &guid, NULL, &size, data);
>>> + if (ret != EFI_SUCCESS) {
>>> + free(data);
>>> + ret = CMD_RET_FAILURE;
>>> + goto out;
>>> + }
>>> +
>>> + efi_deserialize_load_option(&lo, data);
>>> +
>>> + label_len16 = u16_strlen(lo.label);
>>> + label_len = utf16_utf8_strnlen(lo.label, label_len16);
>>> + label = malloc(label_len + 1);
>>> + if (!label) {
>>> + free(data);
>>> + ret = CMD_RET_FAILURE;
>>> + goto out;
>>> + }
>>> + p = label;
>>> + utf16_utf8_strncpy(&p, lo.label, label_len16);
>>> + printf("%2d: Boot%04X: %s\n", i + 1, bootorder[i], label);
>>> + free(label);
>>> +
>>> + free(data);
>>> + }
>>> +out:
>>> + free(bootorder);
>>> +
>>> + return ret;
>>> +}
>>> +
>>> +/**
>>> + * do_efi_boot_next() - manage UEFI BootNext variable
>>> + *
>>> + * @cmdtp: Command table
>>> + * @flag: Command flag
>>> + * @argc: Number of arguments
>>> + * @argv: Argument array
>>> + * Return: CMD_RET_SUCCESS on success,
>>> + * CMD_RET_USAGE or CMD_RET_RET_FAILURE on failure
>>> + *
>>> + * Implement efidebug "boot next" sub-command.
>>> + * Set BootNext variable.
>>> + * - boot next <id>
>>> + */
>>> +static int do_efi_boot_next(cmd_tbl_t *cmdtp, int flag,
>>> + int argc, char * const argv[])
>>> +{
>>> + u16 bootnext;
>>> + efi_uintn_t size;
>>> + char *endp;
>>> + efi_guid_t guid;
>>> + efi_status_t ret;
>>> +
>>> + if (argc != 2)
>>> + return CMD_RET_USAGE;
>>> +
>>> + bootnext = (u16)simple_strtoul(argv[1], &endp, 16);
>>> + if (*endp != '\0' || bootnext > 0xffff) {
>>> + printf("invalid value: %s\n", argv[1]);
>>> + ret = CMD_RET_FAILURE;
>>> + goto out;
>>> + }
>>> +
>>> + guid = efi_global_variable_guid;
>>> + size = sizeof(u16);
>>> + ret = efi_set_variable(L"BootNext", &guid,
>>> + EFI_VARIABLE_BOOTSERVICE_ACCESS |
>>> + EFI_VARIABLE_RUNTIME_ACCESS, size, &bootnext);
>>> + ret = (ret == EFI_SUCCESS ? CMD_RET_SUCCESS : CMD_RET_FAILURE);
>>> +out:
>>> + return ret;
>>> +}
>>> +
>>> +/**
>>> + * do_efi_boot_order() - manage UEFI BootOrder variable
>>> + *
>>> + * @cmdtp: Command table
>>> + * @flag: Command flag
>>> + * @argc: Number of arguments
>>> + * @argv: Argument array
>>> + * Return: CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
>>> + *
>>> + * Implement efidebug "boot order" sub-command.
>>> + * Show order of UEFI boot options, or change it in BootOrder variable.
>>> + * - boot order [<id> ...]
>>> + */
>>> +static int do_efi_boot_order(cmd_tbl_t *cmdtp, int flag,
>>> + int argc, char * const argv[])
>>> +{
>>> + u16 *bootorder = NULL;
>>> + efi_uintn_t size;
>>> + int id, i;
>>> + char *endp;
>>> + efi_guid_t guid;
>>> + efi_status_t ret;
>>> +
>>> + if (argc == 1)
>>> + return show_efi_boot_order();
>>> +
>>> + argc--;
>>> + argv++;
>>> +
>>> + size = argc * sizeof(u16);
>>> + bootorder = malloc(size);
>>> + if (!bootorder)
>>> + return CMD_RET_FAILURE;
>>> +
>>> + for (i = 0; i < argc; i++) {
>>> + id = (int)simple_strtoul(argv[i], &endp, 16);
>>> + if (*endp != '\0' || id > 0xffff) {
>>> + printf("invalid value: %s\n", argv[i]);
>>> + ret = CMD_RET_FAILURE;
>>> + goto out;
>>> + }
>>> +
>>> + bootorder[i] = (u16)id;
>>> + }
>>> +
>>> + guid = efi_global_variable_guid;
>>> + ret = efi_set_variable(L"BootOrder", &guid,
>>> + EFI_VARIABLE_BOOTSERVICE_ACCESS |
>>> + EFI_VARIABLE_RUNTIME_ACCESS, size, bootorder);
>>> + ret = (ret == EFI_SUCCESS ? CMD_RET_SUCCESS : CMD_RET_FAILURE);
>>> +out:
>>> + free(bootorder);
>>> +
>>> + return ret;
>>> +}
>>> +
>>> +static cmd_tbl_t cmd_efidebug_boot_sub[] = {
>>> + U_BOOT_CMD_MKENT(add, CONFIG_SYS_MAXARGS, 1, do_efi_boot_add, "", ""),
>>> + U_BOOT_CMD_MKENT(rm, CONFIG_SYS_MAXARGS, 1, do_efi_boot_rm, "", ""),
>>> + U_BOOT_CMD_MKENT(dump, CONFIG_SYS_MAXARGS, 1, do_efi_boot_dump, "", ""),
>>> + U_BOOT_CMD_MKENT(next, CONFIG_SYS_MAXARGS, 1, do_efi_boot_next, "", ""),
>>> + U_BOOT_CMD_MKENT(order, CONFIG_SYS_MAXARGS, 1, do_efi_boot_order,
>>> + "", ""),
>>> +};
>>> +
>>> +/**
>>> + * do_efi_boot_opt() - manage UEFI boot options
>>> + *
>>> + * @cmdtp: Command table
>>> + * @flag: Command flag
>>> + * @argc: Number of arguments
>>> + * @argv: Argument array
>>> + * Return: CMD_RET_SUCCESS on success,
>>> + * CMD_RET_USAGE or CMD_RET_RET_FAILURE on failure
>>> + *
>>> + * Implement efidebug "boot" sub-command.
>>> + * See above for details of sub-commands.
>>> + */
>>> +static int do_efi_boot_opt(cmd_tbl_t *cmdtp, int flag,
>>> + int argc, char * const argv[])
>>> +{
>>> + cmd_tbl_t *cp;
>>> +
>>> + if (argc < 2)
>>> + return CMD_RET_USAGE;
>>> +
>>> + argc--; argv++;
>>> +
>>> + cp = find_cmd_tbl(argv[0], cmd_efidebug_boot_sub,
>>> + ARRAY_SIZE(cmd_efidebug_boot_sub));
>>> + if (!cp)
>>> + return CMD_RET_USAGE;
>>> +
>>> + return cp->cmd(cmdtp, flag, argc, argv);
>>> +}
>>> +
>>> +static cmd_tbl_t cmd_efidebug_sub[] = {
>>> + U_BOOT_CMD_MKENT(boot, CONFIG_SYS_MAXARGS, 1, do_efi_boot_opt, "", ""),
>>> +};
>>> +
>>> +/**
>>> + * do_efidebug() - display and configure UEFI environment
>>> + *
>>> + * @cmdtp: Command table
>>> + * @flag: Command flag
>>> + * @argc: Number of arguments
>>> + * @argv: Argument array
>>> + * Return: CMD_RET_SUCCESS on success,
>>> + * CMD_RET_USAGE or CMD_RET_RET_FAILURE on failure
>>> + *
>>> + * Implement efidebug command which allows us to dsiplay and
>>> + * configure UEFI environment.
>>> + * See above for details of sub-commands.
>>> + */
>>> +static int do_efidebug(cmd_tbl_t *cmdtp, int flag,
>>> + int argc, char * const argv[])
>>> +{
>>> + cmd_tbl_t *cp;
>>> + efi_status_t r;
>>> +
>>> + if (argc < 2)
>>> + return CMD_RET_USAGE;
>>> +
>>> + argc--; argv++;
>>> +
>>> + /* Initialize UEFI drivers */
>>> + r = efi_init_obj_list();
>>> + if (r != EFI_SUCCESS) {
>>> + printf("Error: Cannot initialize UEFI sub-system, r = %lu\n",
>>> + r & ~EFI_ERROR_MASK);
>>> + return CMD_RET_FAILURE;
>>> + }
>>> +
>>> + cp = find_cmd_tbl(argv[0], cmd_efidebug_sub,
>>> + ARRAY_SIZE(cmd_efidebug_sub));
>>> + if (!cp)
>>> + return CMD_RET_USAGE;
>>> +
>>> + return cp->cmd(cmdtp, flag, argc, argv);
>>> +}
>>> +
>>> +#ifdef CONFIG_SYS_LONGHELP
>>> +static char efidebug_help_text[] =
>>> + " - UEFI Shell-like interface to configure UEFI environment\n"
>>> + "\n"
>>> + "efidebug boot add <bootid> <label> <interface> <devnum>[:<part>] <file path> [<load options>]\n"
>>> + " - set UEFI BootXXXX variable\n"
>>> + " <load options> will be passed to UEFI application\n"
>>> + "efidebug boot rm <bootid#1> [<bootid#2> [<bootid#3> [...]]]\n"
>>> + " - delete UEFI BootXXXX variables\n"
>>> + "efidebug boot dump\n"
>>> + " - dump all UEFI BootXXXX variables\n"
>>> + "efidebug boot next <bootid>\n"
>>> + " - set UEFI BootNext variable\n"
>>> + "efidebug boot order [<bootid#1> [<bootid#2> [<bootid#3> [...]]]]\n"
>>> + " - set/show UEFI boot order\n"
>>> + "\n";
>>> +#endif
>>> +
>>> +U_BOOT_CMD(
>>> + efidebug, 10, 0, do_efidebug,
>>> + "Configure UEFI environment",
>>> + efidebug_help_text
>>> +);
>>>
>>
>
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