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u-boot/include/efi_default_filename.h

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efi_loader: bootmgr: add booting from removable media Under the current implementation, booting from removable media using a architecture-specific default image name, say BOOTAA64.EFI, is supported only in distro_bootcmd script. See the commit 74522c898b35 ("efi_loader: Add distro boot script for removable media"). This is, however, half-baked implementation because 1) UEFI specification requires this feature to be implemented as part of Boot Manager's responsibility: 3 - Boot Manager 3.5.1 Boot via the Simple File Protocol When booting via the EFI_SIMPLE_FILE_SYSTEM_PROTOCOL, the FilePath will start with a device path that points to the device that implements the EFI_SIMPLE_FILE_SYSTEM_PROTOCOL or the EFI_BLOCK_IO_PROTOCOL. The next part of the FilePath may point to the file name, including subdirectories, which contain the bootable image. If the file name is a null device path, the file name must be generated from the rules defined below. ... 3.5.1.1 Removable Media Boot Behavior To generate a file name when none is present in the FilePath, the firmware must append a default file name in the form \EFI\BOOT\BOOT{machine type short-name}.EFI ... 2) So (1) entails the hehavior that the user's preference of boot media order should be determined by Boot#### and BootOrder variables. With this patch, the semantics mentioned above is fully implemented. For example, if you want to boot the system from USB and SCSI in this order, * define Boot0001 which contains only a device path to the USB device (without any file path/name) * define Boot0002 which contains only a device path to the SCSI device, and * set BootOrder to Boot0001:Boot0002 To avoid build error for sandbox, default file name "BOOTSANDBOX.efi" is defined even if it is out of scope of UEFI specification. Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org> Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org> On sandbox use binary name corresponding to host architecture. Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
2022-04-28 08:09:39 +00:00
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* When a boot option does not provide a file path the EFI file to be
* booted is \EFI\BOOT\$(BOOTEFI_NAME).EFI. The architecture specific
* file name is defined in this include.
*
* Copyright (c) 2022, Heinrich Schuchardt <xypron.glpk@gmx.de>
*/
#ifndef _EFI_DEFAULT_FILENAME_H
#define _EFI_DEFAULT_FILENAME_H
#include <host_arch.h>
#undef BOOTEFI_NAME
#if HOST_ARCH == HOST_ARCH_X86_64
#define BOOTEFI_NAME "BOOTX64.EFI"
#endif
#if HOST_ARCH == HOST_ARCH_X86
#define BOOTEFI_NAME "BOOTIA32.EFI"
#endif
#if HOST_ARCH == HOST_ARCH_AARCH64
#define BOOTEFI_NAME "BOOTAA64.EFI"
#endif
#if HOST_ARCH == HOST_ARCH_ARM
#define BOOTEFI_NAME "BOOTARM.EFI"
#endif
#if HOST_ARCH == HOST_ARCH_RISCV32
#define BOOTEFI_NAME "BOOTRISCV32.EFI"
#endif
#if HOST_ARCH == HOST_ARCH_RISCV64
#define BOOTEFI_NAME "BOOTRISCV64.EFI"
#endif
#ifndef BOOTEFI_NAME
#error Unsupported UEFI architecture
#endif
#endif
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