[thirdparty/u-boot.git] / cmd / bootefi.c

/*
 *  EFI application loader
 *
 *  Copyright (c) 2016 Alexander Graf
 *
 *  SPDX-License-Identifier:     GPL-2.0+
 */

#include <common.h>
#include <command.h>
#include <dm.h>
#include <efi_loader.h>
#include <errno.h>
#include <libfdt.h>
#include <libfdt_env.h>
#include <memalign.h>
#include <asm/global_data.h>
#include <asm-generic/sections.h>
#include <linux/linkage.h>

DECLARE_GLOBAL_DATA_PTR;

/*
 * When booting using the "bootefi" command, we don't know which
 * physical device the file came from. So we create a pseudo-device
 * called "bootefi" with the device path /bootefi.
 *
 * In addition to the originating device we also declare the file path
 * of "bootefi" based loads to be /bootefi.
 */
static struct efi_device_path_file_path bootefi_image_path[] = {
	{
		.dp.type = DEVICE_PATH_TYPE_MEDIA_DEVICE,
		.dp.sub_type = DEVICE_PATH_SUB_TYPE_FILE_PATH,
		.dp.length = sizeof(bootefi_image_path[0]),
		.str = { 'b','o','o','t','e','f','i' },
	}, {
		.dp.type = DEVICE_PATH_TYPE_END,
		.dp.sub_type = DEVICE_PATH_SUB_TYPE_END,
		.dp.length = sizeof(bootefi_image_path[0]),
	}
};

static struct efi_device_path_file_path bootefi_device_path[] = {
	{
		.dp.type = DEVICE_PATH_TYPE_MEDIA_DEVICE,
		.dp.sub_type = DEVICE_PATH_SUB_TYPE_FILE_PATH,
		.dp.length = sizeof(bootefi_image_path[0]),
		.str = { 'b','o','o','t','e','f','i' },
	}, {
		.dp.type = DEVICE_PATH_TYPE_END,
		.dp.sub_type = DEVICE_PATH_SUB_TYPE_END,
		.dp.length = sizeof(bootefi_image_path[0]),
	}
};

/* The EFI loaded_image interface for the image executed via "bootefi" */
static struct efi_loaded_image loaded_image_info = {
	.device_handle = bootefi_device_path,
	.file_path = bootefi_image_path,
};

/* The EFI object struct for the image executed via "bootefi" */
static struct efi_object loaded_image_info_obj = {
	.handle = &loaded_image_info,
	.protocols = {
		{
			/*
			 * When asking for the loaded_image interface, just
			 * return handle which points to loaded_image_info
			 */
			.guid = &efi_guid_loaded_image,
			.protocol_interface = &loaded_image_info,
		},
		{
			/*
			 * When asking for the device path interface, return
			 * bootefi_device_path
			 */
			.guid = &efi_guid_device_path,
			.protocol_interface = bootefi_device_path,
		},
		{
			.guid = &efi_guid_console_control,
			.protocol_interface = (void *) &efi_console_control
		},
		{
			.guid = &efi_guid_device_path_to_text_protocol,
			.protocol_interface = (void *) &efi_device_path_to_text
		},
	},
};

/* The EFI object struct for the device the "bootefi" image was loaded from */
static struct efi_object bootefi_device_obj = {
	.handle = bootefi_device_path,
	.protocols = {
		{
			/* When asking for the device path interface, return
			 * bootefi_device_path */
			.guid = &efi_guid_device_path,
			.protocol_interface = bootefi_device_path
		}
	},
};

static void *copy_fdt(void *fdt)
{
	u64 fdt_size = fdt_totalsize(fdt);
	unsigned long fdt_ram_start = -1L, fdt_pages;
	u64 new_fdt_addr;
	void *new_fdt;
	int i;

        for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
                u64 ram_start = gd->bd->bi_dram[i].start;
                u64 ram_size = gd->bd->bi_dram[i].size;

		if (!ram_size)
			continue;

		if (ram_start < fdt_ram_start)
			fdt_ram_start = ram_start;
	}

	/* Give us at least 4kb breathing room */
	fdt_size = ALIGN(fdt_size + 4096, 4096);
	fdt_pages = fdt_size >> EFI_PAGE_SHIFT;

	/* Safe fdt location is at 128MB */
	new_fdt_addr = fdt_ram_start + (128 * 1024 * 1024) + fdt_size;
	if (efi_allocate_pages(1, EFI_BOOT_SERVICES_DATA, fdt_pages,
			       &new_fdt_addr) != EFI_SUCCESS) {
		/* If we can't put it there, put it somewhere */
		new_fdt_addr = (ulong)memalign(4096, fdt_size);
		if (efi_allocate_pages(1, EFI_BOOT_SERVICES_DATA, fdt_pages,
				       &new_fdt_addr) != EFI_SUCCESS) {
			printf("ERROR: Failed to reserve space for FDT\n");
			return NULL;
		}
	}

	new_fdt = (void*)(ulong)new_fdt_addr;
	memcpy(new_fdt, fdt, fdt_totalsize(fdt));
	fdt_set_totalsize(new_fdt, fdt_size);

	return new_fdt;
}

static ulong efi_do_enter(void *image_handle,
			  struct efi_system_table *st,
			  asmlinkage ulong (*entry)(void *image_handle,
				struct efi_system_table *st))
{
	efi_status_t ret = EFI_LOAD_ERROR;

	if (entry)
		ret = entry(image_handle, st);
	st->boottime->exit(image_handle, ret, 0, NULL);
	return ret;
}

#ifdef CONFIG_ARM64
static unsigned long efi_run_in_el2(asmlinkage ulong (*entry)(
			void *image_handle, struct efi_system_table *st),
			void *image_handle, struct efi_system_table *st)
{
	/* Enable caches again */
	dcache_enable();

	return efi_do_enter(image_handle, st, entry);
}
#endif

/*
 * Load an EFI payload into a newly allocated piece of memory, register all
 * EFI objects it would want to access and jump to it.
 */
static unsigned long do_bootefi_exec(void *efi, void *fdt)
{
	ulong (*entry)(void *image_handle, struct efi_system_table *st)
		asmlinkage;
	ulong fdt_pages, fdt_size, fdt_start, fdt_end;
	bootm_headers_t img = { 0 };

	/*
	 * gd lives in a fixed register which may get clobbered while we execute
	 * the payload. So save it here and restore it on every callback entry
	 */
	efi_save_gd();

	if (fdt && !fdt_check_header(fdt)) {
		/* Prepare fdt for payload */
		fdt = copy_fdt(fdt);

		if (image_setup_libfdt(&img, fdt, 0, NULL)) {
			printf("ERROR: Failed to process device tree\n");
			return -EINVAL;
		}

		/* Link to it in the efi tables */
		systab.tables[0].guid = EFI_FDT_GUID;
		systab.tables[0].table = fdt;
		systab.nr_tables = 1;

		/* And reserve the space in the memory map */
		fdt_start = ((ulong)fdt) & ~EFI_PAGE_MASK;
		fdt_end = ((ulong)fdt) + fdt_totalsize(fdt);
		fdt_size = (fdt_end - fdt_start) + EFI_PAGE_MASK;
		fdt_pages = fdt_size >> EFI_PAGE_SHIFT;
		/* Give a bootloader the chance to modify the device tree */
		fdt_pages += 2;
		efi_add_memory_map(fdt_start, fdt_pages,
				   EFI_BOOT_SERVICES_DATA, true);
	} else {
		printf("WARNING: Invalid device tree, expect boot to fail\n");
		systab.nr_tables = 0;
	}

	/* Load the EFI payload */
	entry = efi_load_pe(efi, &loaded_image_info);
	if (!entry)
		return -ENOENT;

	/* Initialize and populate EFI object list */
	INIT_LIST_HEAD(&efi_obj_list);
	list_add_tail(&loaded_image_info_obj.link, &efi_obj_list);
	list_add_tail(&bootefi_device_obj.link, &efi_obj_list);
#ifdef CONFIG_PARTITIONS
	efi_disk_register();
#endif
#ifdef CONFIG_LCD
	efi_gop_register();
#endif
#ifdef CONFIG_NET
	void *nethandle = loaded_image_info.device_handle;
	efi_net_register(&nethandle);

	if (!memcmp(bootefi_device_path[0].str, "N\0e\0t", 6))
		loaded_image_info.device_handle = nethandle;
	else
		loaded_image_info.device_handle = bootefi_device_path;
#endif
#ifdef CONFIG_GENERATE_SMBIOS_TABLE
	efi_smbios_register();
#endif

	/* Initialize EFI runtime services */
	efi_reset_system_init();
	efi_get_time_init();

	/* Call our payload! */
	debug("%s:%d Jumping to 0x%lx\n", __func__, __LINE__, (long)entry);

	if (setjmp(&loaded_image_info.exit_jmp)) {
		efi_status_t status = loaded_image_info.exit_status;
		return status == EFI_SUCCESS ? 0 : -EINVAL;
	}

#ifdef CONFIG_ARM64
	/* On AArch64 we need to make sure we call our payload in < EL3 */
	if (current_el() == 3) {
		smp_kick_all_cpus();
		dcache_disable();	/* flush cache before switch to EL2 */

		/* Move into EL2 and keep running there */
		armv8_switch_to_el2((ulong)entry, (ulong)&loaded_image_info,
				    (ulong)&systab, 0, (ulong)efi_run_in_el2,
				    ES_TO_AARCH64);

		/* Should never reach here, efi exits with longjmp */
		while (1) { }
	}
#endif

	return efi_do_enter(&loaded_image_info, &systab, entry);
}


/* Interpreter command to boot an arbitrary EFI image from memory */
static int do_bootefi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	char *saddr, *sfdt;
	unsigned long addr, fdt_addr = 0;
	int r = 0;

	if (argc < 2)
		return CMD_RET_USAGE;
#ifdef CONFIG_CMD_BOOTEFI_HELLO
	if (!strcmp(argv[1], "hello")) {
		ulong size = __efi_hello_world_end - __efi_hello_world_begin;

		addr = CONFIG_SYS_LOAD_ADDR;
		memcpy((char *)addr, __efi_hello_world_begin, size);
	} else
#endif
	{
		saddr = argv[1];

		addr = simple_strtoul(saddr, NULL, 16);

		if (argc > 2) {
			sfdt = argv[2];
			fdt_addr = simple_strtoul(sfdt, NULL, 16);
		}
	}

	printf("## Starting EFI application at %08lx ...\n", addr);
	r = do_bootefi_exec((void *)addr, (void*)fdt_addr);
	printf("## Application terminated, r = %d\n", r);

	if (r != 0)
		r = 1;

	return r;
}

#ifdef CONFIG_SYS_LONGHELP
static char bootefi_help_text[] =
	"<image address> [fdt address]\n"
	"  - boot EFI payload stored at address <image address>.\n"
	"    If specified, the device tree located at <fdt address> gets\n"
	"    exposed as EFI configuration table.\n"
#ifdef CONFIG_CMD_BOOTEFI_HELLO
	"hello\n"
	"  - boot a sample Hello World application stored within U-Boot"
#endif
	;
#endif

U_BOOT_CMD(
	bootefi, 3, 0, do_bootefi,
	"Boots an EFI payload from memory",
	bootefi_help_text
);

void efi_set_bootdev(const char *dev, const char *devnr, const char *path)
{
	__maybe_unused struct blk_desc *desc;
	char devname[32] = { 0 }; /* dp->str is u16[32] long */
	char *colon;

#if defined(CONFIG_BLK) || CONFIG_IS_ENABLED(ISO_PARTITION)
	desc = blk_get_dev(dev, simple_strtol(devnr, NULL, 10));
#endif

#ifdef CONFIG_BLK
	if (desc) {
		snprintf(devname, sizeof(devname), "%s", desc->bdev->name);
	} else
#endif

	{
		/* Assemble the condensed device name we use in efi_disk.c */
		snprintf(devname, sizeof(devname), "%s%s", dev, devnr);
	}

	colon = strchr(devname, ':');

#if CONFIG_IS_ENABLED(ISO_PARTITION)
	/* For ISOs we create partition block devices */
	if (desc && (desc->type != DEV_TYPE_UNKNOWN) &&
	    (desc->part_type == PART_TYPE_ISO)) {
		if (!colon)
			snprintf(devname, sizeof(devname), "%s:1", devname);

		colon = NULL;
	}
#endif

	if (colon)
		*colon = '\0';

	/* Patch bootefi_device_path to the target device */
	memset(bootefi_device_path[0].str, 0, sizeof(bootefi_device_path[0].str));
	ascii2unicode(bootefi_device_path[0].str, devname);

	/* Patch bootefi_image_path to the target file path */
	memset(bootefi_image_path[0].str, 0, sizeof(bootefi_image_path[0].str));
	if (strcmp(dev, "Net")) {
		/* Add leading / to fs paths, because they're absolute */
		snprintf(devname, sizeof(devname), "/%s", path);
	} else {
		snprintf(devname, sizeof(devname), "%s", path);
	}
	ascii2unicode(bootefi_image_path[0].str, devname);
}
Commit	Line	Data
b9939336 AG	1	/*
	2	* EFI application loader
	3	*
	4	* Copyright (c) 2016 Alexander Graf
	5	*
	6	* SPDX-License-Identifier: GPL-2.0+
	7	*/
	8
	9	#include <common.h>
	10	#include <command.h>
9d922450	11	#include <dm.h>
b9939336 AG	12	#include <efi_loader.h>
	13	#include <errno.h>
	14	#include <libfdt.h>
	15	#include <libfdt_env.h>
ad0c1a3d	16	#include <memalign.h>
0d9d501f	17	#include <asm/global_data.h>
e275458c SG	18	#include <asm-generic/sections.h>
e275458c SG	19	#include <linux/linkage.h>
0d9d501f AG	20
0d9d501f AG	21	DECLARE_GLOBAL_DATA_PTR;
b9939336 AG	22
	23	/*
	24	* When booting using the "bootefi" command, we don't know which
	25	* physical device the file came from. So we create a pseudo-device
	26	* called "bootefi" with the device path /bootefi.
	27	*
	28	* In addition to the originating device we also declare the file path
	29	* of "bootefi" based loads to be /bootefi.
	30	*/
0f4060eb	31	static struct efi_device_path_file_path bootefi_image_path[] = {
b9939336 AG	32	{
	33	.dp.type = DEVICE_PATH_TYPE_MEDIA_DEVICE,
	34	.dp.sub_type = DEVICE_PATH_SUB_TYPE_FILE_PATH,
0f4060eb	35	.dp.length = sizeof(bootefi_image_path[0]),
b9939336 AG	36	.str = { 'b','o','o','t','e','f','i' },
	37	}, {
	38	.dp.type = DEVICE_PATH_TYPE_END,
	39	.dp.sub_type = DEVICE_PATH_SUB_TYPE_END,
0f4060eb	40	.dp.length = sizeof(bootefi_image_path[0]),
b9939336 AG	41	}
	42	};
	43
c07ad7c0 AG	44	static struct efi_device_path_file_path bootefi_device_path[] = {
	45	{
	46	.dp.type = DEVICE_PATH_TYPE_MEDIA_DEVICE,
	47	.dp.sub_type = DEVICE_PATH_SUB_TYPE_FILE_PATH,
	48	.dp.length = sizeof(bootefi_image_path[0]),
	49	.str = { 'b','o','o','t','e','f','i' },
	50	}, {
	51	.dp.type = DEVICE_PATH_TYPE_END,
	52	.dp.sub_type = DEVICE_PATH_SUB_TYPE_END,
	53	.dp.length = sizeof(bootefi_image_path[0]),
	54	}
	55	};
	56
b9939336 AG	57	/* The EFI loaded_image interface for the image executed via "bootefi" */
b9939336 AG	58	static struct efi_loaded_image loaded_image_info = {
c07ad7c0	59	.device_handle = bootefi_device_path,
0f4060eb	60	.file_path = bootefi_image_path,
b9939336 AG	61	};
	62
	63	/* The EFI object struct for the image executed via "bootefi" */
	64	static struct efi_object loaded_image_info_obj = {
	65	.handle = &loaded_image_info,
	66	.protocols = {
	67	{
	68	/*
	69	* When asking for the loaded_image interface, just
	70	* return handle which points to loaded_image_info
	71	*/
	72	.guid = &efi_guid_loaded_image,
b5349f74	73	.protocol_interface = &loaded_image_info,
b9939336 AG	74	},
	75	{
	76	/*
	77	* When asking for the device path interface, return
c07ad7c0	78	* bootefi_device_path
b9939336 AG	79	*/
b9939336 AG	80	.guid = &efi_guid_device_path,
b5349f74	81	.protocol_interface = bootefi_device_path,
b9939336	82	},
88adae5e HS	83	{
	84	.guid = &efi_guid_console_control,
	85	.protocol_interface = (void *) &efi_console_control
	86	},
cc5b7081 HS	87	{
	88	.guid = &efi_guid_device_path_to_text_protocol,
	89	.protocol_interface = (void *) &efi_device_path_to_text
	90	},
b9939336 AG	91	},
	92	};
	93
	94	/* The EFI object struct for the device the "bootefi" image was loaded from */
	95	static struct efi_object bootefi_device_obj = {
c07ad7c0	96	.handle = bootefi_device_path,
b9939336 AG	97	.protocols = {
	98	{
	99	/* When asking for the device path interface, return
c07ad7c0	100	* bootefi_device_path */
b9939336	101	.guid = &efi_guid_device_path,
b5349f74	102	.protocol_interface = bootefi_device_path
b9939336 AG	103	}
	104	},
	105	};
	106
0d9d501f AG	107	static void copy_fdt(void fdt)
	108	{
	109	u64 fdt_size = fdt_totalsize(fdt);
ad0c1a3d AG	110	unsigned long fdt_ram_start = -1L, fdt_pages;
ad0c1a3d AG	111	u64 new_fdt_addr;
0d9d501f	112	void *new_fdt;
ad0c1a3d	113	int i;
0d9d501f	114
ad0c1a3d AG	115	for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
	116	u64 ram_start = gd->bd->bi_dram[i].start;
	117	u64 ram_size = gd->bd->bi_dram[i].size;
0d9d501f	118
ad0c1a3d AG	119	if (!ram_size)
	120	continue;
	121
	122	if (ram_start < fdt_ram_start)
	123	fdt_ram_start = ram_start;
	124	}
	125
	126	/* Give us at least 4kb breathing room */
	127	fdt_size = ALIGN(fdt_size + 4096, 4096);
	128	fdt_pages = fdt_size >> EFI_PAGE_SHIFT;
	129
	130	/* Safe fdt location is at 128MB */
	131	new_fdt_addr = fdt_ram_start + (128 * 1024 * 1024) + fdt_size;
	132	if (efi_allocate_pages(1, EFI_BOOT_SERVICES_DATA, fdt_pages,
	133	&new_fdt_addr) != EFI_SUCCESS) {
	134	/* If we can't put it there, put it somewhere */
	135	new_fdt_addr = (ulong)memalign(4096, fdt_size);
85a6e9b3 AG	136	if (efi_allocate_pages(1, EFI_BOOT_SERVICES_DATA, fdt_pages,
	137	&new_fdt_addr) != EFI_SUCCESS) {
	138	printf("ERROR: Failed to reserve space for FDT\n");
	139	return NULL;
	140	}
ad0c1a3d	141	}
85a6e9b3	142
ad0c1a3d	143	new_fdt = (void*)(ulong)new_fdt_addr;
0d9d501f AG	144	memcpy(new_fdt, fdt, fdt_totalsize(fdt));
	145	fdt_set_totalsize(new_fdt, fdt_size);
	146
	147	return new_fdt;
	148	}
	149
b06d8ac3 HS	150	static ulong efi_do_enter(void *image_handle,
	151	struct efi_system_table *st,
	152	asmlinkage ulong (entry)(void image_handle,
	153	struct efi_system_table *st))
	154	{
	155	efi_status_t ret = EFI_LOAD_ERROR;
	156
	157	if (entry)
	158	ret = entry(image_handle, st);
	159	st->boottime->exit(image_handle, ret, 0, NULL);
	160	return ret;
	161	}
	162
ec6617c3	163	#ifdef CONFIG_ARM64
b06d8ac3 HS	164	static unsigned long efi_run_in_el2(asmlinkage ulong (*entry)(
	165	void image_handle, struct efi_system_table st),
	166	void image_handle, struct efi_system_table st)
ec6617c3 AW	167	{
	168	/* Enable caches again */
	169	dcache_enable();
	170
b06d8ac3	171	return efi_do_enter(image_handle, st, entry);
ec6617c3 AW	172	}
	173	#endif
	174
b9939336 AG	175	/*
	176	* Load an EFI payload into a newly allocated piece of memory, register all
	177	* EFI objects it would want to access and jump to it.
	178	*/
1c39809b	179	static unsigned long do_bootefi_exec(void efi, void fdt)
b9939336	180	{
e275458c SG	181	ulong (entry)(void image_handle, struct efi_system_table *st)
e275458c SG	182	asmlinkage;
b9939336	183	ulong fdt_pages, fdt_size, fdt_start, fdt_end;
dea2174d	184	bootm_headers_t img = { 0 };
b9939336 AG	185
	186	/*
	187	* gd lives in a fixed register which may get clobbered while we execute
	188	* the payload. So save it here and restore it on every callback entry
	189	*/
	190	efi_save_gd();
	191
1c39809b	192	if (fdt && !fdt_check_header(fdt)) {
dea2174d	193	/* Prepare fdt for payload */
0d9d501f AG	194	fdt = copy_fdt(fdt);
	195
	196	if (image_setup_libfdt(&img, fdt, 0, NULL)) {
dea2174d AG	197	printf("ERROR: Failed to process device tree\n");
	198	return -EINVAL;
	199	}
	200
	201	/* Link to it in the efi tables */
b9939336	202	systab.tables[0].guid = EFI_FDT_GUID;
0d9d501f	203	systab.tables[0].table = fdt;
b9939336 AG	204	systab.nr_tables = 1;
	205
	206	/* And reserve the space in the memory map */
0d9d501f AG	207	fdt_start = ((ulong)fdt) & ~EFI_PAGE_MASK;
0d9d501f AG	208	fdt_end = ((ulong)fdt) + fdt_totalsize(fdt);
b9939336 AG	209	fdt_size = (fdt_end - fdt_start) + EFI_PAGE_MASK;
	210	fdt_pages = fdt_size >> EFI_PAGE_SHIFT;
	211	/* Give a bootloader the chance to modify the device tree */
	212	fdt_pages += 2;
	213	efi_add_memory_map(fdt_start, fdt_pages,
	214	EFI_BOOT_SERVICES_DATA, true);
b9939336	215	} else {
1c39809b	216	printf("WARNING: Invalid device tree, expect boot to fail\n");
b9939336 AG	217	systab.nr_tables = 0;
	218	}
	219
	220	/* Load the EFI payload */
	221	entry = efi_load_pe(efi, &loaded_image_info);
	222	if (!entry)
	223	return -ENOENT;
	224
	225	/* Initialize and populate EFI object list */
	226	INIT_LIST_HEAD(&efi_obj_list);
	227	list_add_tail(&loaded_image_info_obj.link, &efi_obj_list);
	228	list_add_tail(&bootefi_device_obj.link, &efi_obj_list);
	229	#ifdef CONFIG_PARTITIONS
	230	efi_disk_register();
	231	#endif
be8d3241 AG	232	#ifdef CONFIG_LCD
	233	efi_gop_register();
	234	#endif
0efe1bcf AG	235	#ifdef CONFIG_NET
	236	void *nethandle = loaded_image_info.device_handle;
	237	efi_net_register(&nethandle);
	238
	239	if (!memcmp(bootefi_device_path[0].str, "N\0e\0t", 6))
	240	loaded_image_info.device_handle = nethandle;
3fb97e26 AG	241	else
3fb97e26 AG	242	loaded_image_info.device_handle = bootefi_device_path;
0efe1bcf	243	#endif
e663b350 AG	244	#ifdef CONFIG_GENERATE_SMBIOS_TABLE
	245	efi_smbios_register();
	246	#endif
b9939336	247
80a4800e AG	248	/* Initialize EFI runtime services */
	249	efi_reset_system_init();
	250	efi_get_time_init();
	251
b9939336	252	/* Call our payload! */
edcef3ba	253	debug("%s:%d Jumping to 0x%lx\n", __func__, __LINE__, (long)entry);
a86aeaf2 AG	254
	255	if (setjmp(&loaded_image_info.exit_jmp)) {
	256	efi_status_t status = loaded_image_info.exit_status;
	257	return status == EFI_SUCCESS ? 0 : -EINVAL;
	258	}
	259
69bd459d AG	260	#ifdef CONFIG_ARM64
	261	/* On AArch64 we need to make sure we call our payload in < EL3 */
	262	if (current_el() == 3) {
	263	smp_kick_all_cpus();
	264	dcache_disable(); /* flush cache before switch to EL2 */
ec6617c3 AW	265
	266	/* Move into EL2 and keep running there */
	267	armv8_switch_to_el2((ulong)entry, (ulong)&loaded_image_info,
7c5e1feb	268	(ulong)&systab, 0, (ulong)efi_run_in_el2,
ec6617c3 AW	269	ES_TO_AARCH64);
	270
	271	/* Should never reach here, efi exits with longjmp */
	272	while (1) { }
69bd459d AG	273	}
	274	#endif
	275
b06d8ac3	276	return efi_do_enter(&loaded_image_info, &systab, entry);
b9939336 AG	277	}
	278
	279
	280	/* Interpreter command to boot an arbitrary EFI image from memory */
	281	static int do_bootefi(cmd_tbl_t cmdtp, int flag, int argc, char const argv[])
	282	{
1c39809b AG	283	char saddr, sfdt;
1c39809b AG	284	unsigned long addr, fdt_addr = 0;
b9939336 AG	285	int r = 0;
	286
	287	if (argc < 2)
3c1dcef6	288	return CMD_RET_USAGE;
c7ae3dfd SG	289	#ifdef CONFIG_CMD_BOOTEFI_HELLO
	290	if (!strcmp(argv[1], "hello")) {
	291	ulong size = __efi_hello_world_end - __efi_hello_world_begin;
b9939336	292
c7ae3dfd SG	293	addr = CONFIG_SYS_LOAD_ADDR;
	294	memcpy((char *)addr, __efi_hello_world_begin, size);
	295	} else
	296	#endif
	297	{
	298	saddr = argv[1];
b9939336	299
c7ae3dfd SG	300	addr = simple_strtoul(saddr, NULL, 16);
	301
	302	if (argc > 2) {
	303	sfdt = argv[2];
	304	fdt_addr = simple_strtoul(sfdt, NULL, 16);
	305	}
1c39809b AG	306	}
1c39809b AG	307
5ee31baf	308	printf("## Starting EFI application at %08lx ...\n", addr);
1c39809b	309	r = do_bootefi_exec((void )addr, (void)fdt_addr);
b9939336 AG	310	printf("## Application terminated, r = %d\n", r);
	311
	312	if (r != 0)
	313	r = 1;
	314
	315	return r;
	316	}
	317
	318	#ifdef CONFIG_SYS_LONGHELP
	319	static char bootefi_help_text[] =
1c39809b AG	320	"<image address> [fdt address]\n"
	321	" - boot EFI payload stored at address <image address>.\n"
	322	" If specified, the device tree located at <fdt address> gets\n"
c7ae3dfd SG	323	" exposed as EFI configuration table.\n"
	324	#ifdef CONFIG_CMD_BOOTEFI_HELLO
	325	"hello\n"
	326	" - boot a sample Hello World application stored within U-Boot"
	327	#endif
	328	;
b9939336 AG	329	#endif
	330
	331	U_BOOT_CMD(
1c39809b	332	bootefi, 3, 0, do_bootefi,
92dfd922	333	"Boots an EFI payload from memory",
b9939336 AG	334	bootefi_help_text
b9939336 AG	335	);
0f4060eb	336
c07ad7c0	337	void efi_set_bootdev(const char dev, const char devnr, const char *path)
0f4060eb	338	{
8c3df0bf	339	__maybe_unused struct blk_desc *desc;
ecbe1a07	340	char devname[32] = { 0 }; /* dp->str is u16[32] long */
0f4060eb AG	341	char *colon;
0f4060eb AG	342
1acc0087	343	#if defined(CONFIG_BLK) \|\| CONFIG_IS_ENABLED(ISO_PARTITION)
f9d334bd AG	344	desc = blk_get_dev(dev, simple_strtol(devnr, NULL, 10));
	345	#endif
	346
	347	#ifdef CONFIG_BLK
	348	if (desc) {
	349	snprintf(devname, sizeof(devname), "%s", desc->bdev->name);
	350	} else
	351	#endif
	352
	353	{
	354	/* Assemble the condensed device name we use in efi_disk.c */
	355	snprintf(devname, sizeof(devname), "%s%s", dev, devnr);
	356	}
	357
0f4060eb	358	colon = strchr(devname, ':');
8c3df0bf	359
1acc0087	360	#if CONFIG_IS_ENABLED(ISO_PARTITION)
8c3df0bf	361	/* For ISOs we create partition block devices */
8c3df0bf AG	362	if (desc && (desc->type != DEV_TYPE_UNKNOWN) &&
	363	(desc->part_type == PART_TYPE_ISO)) {
	364	if (!colon)
f9d334bd AG	365	snprintf(devname, sizeof(devname), "%s:1", devname);
f9d334bd AG	366
8c3df0bf AG	367	colon = NULL;
	368	}
	369	#endif
	370
0f4060eb AG	371	if (colon)
	372	*colon = '\0';
	373
c07ad7c0 AG	374	/* Patch bootefi_device_path to the target device */
	375	memset(bootefi_device_path[0].str, 0, sizeof(bootefi_device_path[0].str));
	376	ascii2unicode(bootefi_device_path[0].str, devname);
	377
	378	/* Patch bootefi_image_path to the target file path */
0f4060eb	379	memset(bootefi_image_path[0].str, 0, sizeof(bootefi_image_path[0].str));
49271666 AG	380	if (strcmp(dev, "Net")) {
	381	/* Add leading / to fs paths, because they're absolute */
	382	snprintf(devname, sizeof(devname), "/%s", path);
	383	} else {
	384	snprintf(devname, sizeof(devname), "%s", path);
	385	}
0f4060eb AG	386	ascii2unicode(bootefi_image_path[0].str, devname);
0f4060eb AG	387	}