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bootm: Add a bootm command for type IH_OS_EFI 

Add support for booting EFI binaries contained in FIT images.
A typical usage scenario is chain-loading GRUB2 in a verified
boot environment.

Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@gmail.com>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Cristian Ciocaltea 2019-12-24 18:05:39 +02:00 committed by Heinrich Schuchardt
parent a031b03f64
commit ecc7fdaa9e
2 changed files with 63 additions and 0 deletions
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7
cmd/Kconfig
View File

@ -259,6 +259,13 @@ config CMD_BOOTM
help
Boot an application image from the memory.
config BOOTM_EFI
bool "Support booting UEFI FIT images"
depends on CMD_BOOTEFI && CMD_BOOTM && FIT
default y
help
Support booting UEFI FIT images via the bootm command.
config CMD_BOOTZ
bool "bootz"
help

56
common/bootm_os.c
View File

@ -7,10 +7,12 @@
#include <common.h>
#include <bootm.h>
#include <cpu_func.h>
#include <efi_loader.h>
#include <env.h>
#include <fdt_support.h>
#include <linux/libfdt.h>
#include <malloc.h>
#include <mapmem.h>
#include <vxworks.h>
#include <tee/optee.h>
@ -498,6 +500,57 @@ static int do_bootm_tee(int flag, int argc, char * const argv[],
}
#endif
#ifdef CONFIG_BOOTM_EFI
static int do_bootm_efi(int flag, int argc, char * const argv[],
bootm_headers_t *images)
{
int ret;
efi_status_t efi_ret;
void *image_buf;
if (flag != BOOTM_STATE_OS_GO)
return 0;
/* Locate FDT, if provided */
ret = bootm_find_images(flag, argc, argv);
if (ret)
return ret;
/* Initialize EFI drivers */
efi_ret = efi_init_obj_list();
if (efi_ret != EFI_SUCCESS) {
printf("## Failed to initialize UEFI sub-system: r = %lu\n",
efi_ret & ~EFI_ERROR_MASK);
return 1;
}
/* Install device tree */
efi_ret = efi_install_fdt(images->ft_len
? images->ft_addr : EFI_FDT_USE_INTERNAL);
if (efi_ret != EFI_SUCCESS) {
printf("## Failed to install device tree: r = %lu\n",
efi_ret & ~EFI_ERROR_MASK);
return 1;
}
/* Run EFI image */
printf("## Transferring control to EFI (at address %08lx) ...\n",
images->ep);
bootstage_mark(BOOTSTAGE_ID_RUN_OS);
image_buf = map_sysmem(images->ep, images->os.image_len);
efi_ret = efi_run_image(image_buf, images->os.image_len);
if (efi_ret != EFI_SUCCESS) {
printf("## Failed to run EFI image: r = %lu\n",
efi_ret & ~EFI_ERROR_MASK);
return 1;
}
return 0;
}
#endif
static boot_os_fn *boot_os[] = {
[IH_OS_U_BOOT] = do_bootm_standalone,
#ifdef CONFIG_BOOTM_LINUX
@ -534,6 +587,9 @@ static boot_os_fn *boot_os[] = {
#ifdef CONFIG_BOOTM_OPTEE
[IH_OS_TEE] = do_bootm_tee,
#endif
#ifdef CONFIG_BOOTM_EFI
[IH_OS_EFI] = do_bootm_efi,
#endif
};
/* Allow for arch specific config before we boot */