mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-21 17:38:51 +09:00
![Patrick Delaunay](/assets/img/avatar_default.png)
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com> Signed-off-by: Patrick Delaunay <patrick.delaunay73@gmail.com>
369 lines
9.6 KiB
C
369 lines
9.6 KiB
C
/*
|
|
* EFI application loader
|
|
*
|
|
* Copyright (c) 2016 Alexander Graf
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <command.h>
|
|
#include <dm/device.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]),
|
|
}
|
|
};
|
|
|
|
static efi_status_t EFIAPI bootefi_open_dp(void *handle, efi_guid_t *protocol,
|
|
void **protocol_interface, void *agent_handle,
|
|
void *controller_handle, uint32_t attributes)
|
|
{
|
|
*protocol_interface = bootefi_device_path;
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/* 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,
|
|
.open = &efi_return_handle,
|
|
},
|
|
{
|
|
/*
|
|
* When asking for the device path interface, return
|
|
* bootefi_device_path
|
|
*/
|
|
.guid = &efi_guid_device_path,
|
|
.open = &bootefi_open_dp,
|
|
},
|
|
},
|
|
};
|
|
|
|
/* 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,
|
|
.open = &bootefi_open_dp,
|
|
}
|
|
},
|
|
};
|
|
|
|
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);
|
|
}
|
|
new_fdt = (void*)(ulong)new_fdt_addr;
|
|
memcpy(new_fdt, fdt, fdt_totalsize(fdt));
|
|
fdt_set_totalsize(new_fdt, fdt_size);
|
|
|
|
return new_fdt;
|
|
}
|
|
|
|
#ifdef CONFIG_ARM64
|
|
static unsigned long efi_run_in_el2(ulong (*entry)(void *image_handle,
|
|
struct efi_system_table *st), void *image_handle,
|
|
struct efi_system_table *st)
|
|
{
|
|
/* Enable caches again */
|
|
dcache_enable();
|
|
|
|
return entry(image_handle, st);
|
|
}
|
|
#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 entry(&loaded_image_info, &systab);
|
|
}
|
|
|
|
|
|
/* 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);
|
|
}
|