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// SPDX-License-Identifier: GPL-2.0+
/*
* EFI application loader
*
* Copyright (c) 2016 Alexander Graf
*/
#define LOG_CATEGORY LOGC_EFI
#include <command.h>
#include <efi.h>
#include <efi_loader.h>
#include <exports.h>
#include <log.h>
#include <malloc.h>
#include <mapmem.h>
#include <vsprintf.h>
#include <asm-generic/sections.h>
#include <asm/global_data.h>
#include <linux/string.h>
DECLARE_GLOBAL_DATA_PTR;
static struct efi_device_path *test_image_path;
static struct efi_device_path *test_device_path;
static efi_status_t bootefi_run_prepare(const char *load_options_path,
struct efi_device_path *device_path,
struct efi_device_path *image_path,
struct efi_loaded_image_obj **image_objp,
struct efi_loaded_image **loaded_image_infop)
{
efi_status_t ret;
u16 *load_options;
ret = efi_setup_loaded_image(device_path, image_path, image_objp,
loaded_image_infop);
if (ret != EFI_SUCCESS)
return ret;
/* Transfer environment variable as load options */
return efi_env_set_load_options((efi_handle_t)*image_objp,
load_options_path,
&load_options);
}
/**
* bootefi_test_prepare() - prepare to run an EFI test
*
* Prepare to run a test as if it were provided by a loaded image.
*
* @image_objp: pointer to be set to the loaded image handle
* @loaded_image_infop: pointer to be set to the loaded image protocol
* @path: dummy file path used to construct the device path
* set in the loaded image protocol
* @load_options_path: name of a U-Boot environment variable. Its value is
* set as load options in the loaded image protocol.
* Return: status code
*/
static efi_status_t bootefi_test_prepare
(struct efi_loaded_image_obj **image_objp,
struct efi_loaded_image **loaded_image_infop, const char *path,
const char *load_options_path)
{
efi_status_t ret;
/* Construct a dummy device path */
test_device_path = efi_dp_from_mem(EFI_RESERVED_MEMORY_TYPE, 0, 0);
if (!test_device_path)
return EFI_OUT_OF_RESOURCES;
test_image_path = efi_dp_from_file(NULL, path);
if (!test_image_path) {
ret = EFI_OUT_OF_RESOURCES;
goto failure;
}
ret = bootefi_run_prepare(load_options_path, test_device_path,
test_image_path, image_objp,
loaded_image_infop);
if (ret == EFI_SUCCESS)
return ret;
failure:
efi_free_pool(test_device_path);
efi_free_pool(test_image_path);
/* TODO: not sure calling clear function is necessary */
efi_clear_bootdev();
return ret;
}
/**
* do_efi_selftest() - execute EFI selftest
*
* Return: status code
*/
static int do_efi_selftest(void)
{
struct efi_loaded_image_obj *image_obj;
struct efi_loaded_image *loaded_image_info;
efi_status_t ret;
ret = bootefi_test_prepare(&image_obj, &loaded_image_info,
"\\selftest", "efi_selftest");
if (ret != EFI_SUCCESS)
return CMD_RET_FAILURE;
/* Execute the test */
ret = EFI_CALL(efi_selftest(&image_obj->header, &systab));
efi_restore_gd();
free(loaded_image_info->load_options);
efi_free_pool(test_device_path);
efi_free_pool(test_image_path);
if (ret != EFI_SUCCESS)
efi_delete_handle(&image_obj->header);
else
ret = efi_delete_handle(&image_obj->header);
return ret != EFI_SUCCESS;
}
/**
* do_bootefi() - execute `bootefi` command
*
* @cmdtp: table entry describing command
* @flag: bitmap indicating how the command was invoked
* @argc: number of arguments
* @argv: command line arguments
* Return: status code
*/
static int do_bootefi(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
efi_status_t ret;
char *p;
void *fdt, *image_buf;
unsigned long addr, size;
void *image_addr;
size_t image_size;
if (argc < 2)
return CMD_RET_USAGE;
if (argc > 2) {
uintptr_t fdt_addr;
fdt_addr = hextoul(argv[2], NULL);
fdt = map_sysmem(fdt_addr, 0);
} else {
fdt = EFI_FDT_USE_INTERNAL;
}
if (IS_ENABLED(CONFIG_CMD_BOOTEFI_BOOTMGR) &&
!strcmp(argv[1], "bootmgr")) {
ret = efi_bootmgr_run(fdt);
if (ret != EFI_SUCCESS)
return CMD_RET_FAILURE;
return CMD_RET_SUCCESS;
}
if (IS_ENABLED(CONFIG_CMD_BOOTEFI_SELFTEST) &&
!strcmp(argv[1], "selftest")) {
/* Initialize EFI drivers */
ret = efi_init_obj_list();
if (ret != EFI_SUCCESS) {
log_err("Error: Cannot initialize UEFI sub-system, r = %lu\n",
ret & ~EFI_ERROR_MASK);
return CMD_RET_FAILURE;
}
ret = efi_install_fdt(fdt);
if (ret != EFI_SUCCESS)
return CMD_RET_FAILURE;
return do_efi_selftest();
}
if (!IS_ENABLED(CONFIG_CMD_BOOTEFI_BINARY))
return CMD_RET_SUCCESS;
if (IS_ENABLED(CONFIG_CMD_BOOTEFI_HELLO) &&
!strcmp(argv[1], "hello")) {
image_buf = __efi_helloworld_begin;
size = __efi_helloworld_end - __efi_helloworld_begin;
/* TODO: not sure calling clear function is necessary */
efi_clear_bootdev();
} else {
addr = strtoul(argv[1], NULL, 16);
/* Check that a numeric value was passed */
if (!addr)
return CMD_RET_USAGE;
image_buf = map_sysmem(addr, 0);
p = strchr(argv[1], ':');
if (p) {
size = strtoul(++p, NULL, 16);
if (!size)
return CMD_RET_USAGE;
efi_clear_bootdev();
} else {
/* Image should be already loaded */
efi_get_image_parameters(&image_addr, &image_size);
if (image_buf != image_addr) {
log_err("No UEFI binary known at %s\n",
argv[1]);
return CMD_RET_FAILURE;
}
size = image_size;
}
}
ret = efi_binary_run(image_buf, size, fdt);
if (ret != EFI_SUCCESS)
return CMD_RET_FAILURE;
return CMD_RET_SUCCESS;
}
U_BOOT_LONGHELP(bootefi,
"<image address>[:<image size>] [<fdt address>]\n"
" - boot EFI payload\n"
#ifdef CONFIG_CMD_BOOTEFI_HELLO
"bootefi hello\n"
" - boot a sample Hello World application stored within U-Boot\n"
#endif
#ifdef CONFIG_CMD_BOOTEFI_SELFTEST
"bootefi selftest [fdt address]\n"
" - boot an EFI selftest application stored within U-Boot\n"
" Use environment variable efi_selftest to select a single test.\n"
" Use 'setenv efi_selftest list' to enumerate all tests.\n"
#endif
#ifdef CONFIG_CMD_BOOTEFI_BOOTMGR
"bootefi bootmgr [fdt address]\n"
" - load and boot EFI payload based on BootOrder/BootXXXX variables.\n"
"\n"
" If specified, the device tree located at <fdt address> gets\n"
" exposed as EFI configuration table.\n"
#endif
);
U_BOOT_CMD(
bootefi, 4, 0, do_bootefi,
"Boots an EFI payload from memory",
bootefi_help_text
);
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