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efi_loader: Support loading a ramdisk with bootefi

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It is sometimes useful to be able to boot via EFI using a Linux initrd.
Add support for this.

Fix a 'specifiy' typo while here.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Mark Kettenis <kettenis@openbsd.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
This commit is contained in:
Simon Glass
2025-08-05 07:46:14 +02:00
committed by Heinrich Schuchardt
parent 8e5d34a3a2
commit 47e9b73954
2 changed files with 56 additions and 16 deletions
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35
cmd/bootefi.c
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@@ -136,23 +136,40 @@ static int do_bootefi(struct cmd_tbl *cmdtp, int flag, int argc,
{
efi_status_t ret;
char *p;
void *fdt, *image_buf;
unsigned long addr, size;
void *fdt, *initrd = NULL, *image_buf;
unsigned long addr, size, rd_len = 0, fdt_addr = 0;
void *image_addr;
size_t image_size;
int fdt_arg = 2;
if (argc < 2)
return CMD_RET_USAGE;
if (argc > 2) {
uintptr_t fdt_addr;
ulong rd_addr = 0;
char *end = strchr(argv[2], ':');
fdt_addr = hextoul(argv[2], NULL);
fdt = map_sysmem(fdt_addr, 0);
} else {
fdt = EFI_FDT_USE_INTERNAL;
if (end) {
rd_addr = hextoul(argv[2], NULL);
if (!rd_addr)
return CMD_RET_USAGE;
rd_len = hextoul(++end, NULL);
initrd = map_sysmem(rd_addr, rd_len);
++fdt_arg;
}
}
if (argc > fdt_arg + 1)
return CMD_RET_USAGE;
if (argc == fdt_arg + 1)
fdt_addr = hextoul(argv[fdt_arg], NULL);
if (fdt_addr)
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);
@@ -215,7 +232,7 @@ static int do_bootefi(struct cmd_tbl *cmdtp, int flag, int argc,
}
}
ret = efi_binary_run(image_buf, size, fdt, NULL, 0);
ret = efi_binary_run(image_buf, size, fdt, initrd, rd_len);
if (ret != EFI_SUCCESS)
return CMD_RET_FAILURE;
@@ -224,7 +241,7 @@ static int do_bootefi(struct cmd_tbl *cmdtp, int flag, int argc,
}
U_BOOT_LONGHELP(bootefi,
"<image address>[:<image size>] [<fdt address>]\n"
"<image address>[:<size>] [<initrd address>:<size>] [<fdt address>]\n"
" - boot EFI payload\n"
#ifdef CONFIG_CMD_BOOTEFI_HELLO
"bootefi hello\n"