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https://github.com/u-boot/u-boot.git
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0b41525e8f
Add a bootmeth driver which handles EFI boot manager, using EFI_LOADER. In effect, this provides the same functionality as the 'bootefi bootmgr' command and shares the same code. But the interface into it is via a bootmeth, so it does not require any special scripts, etc. For now this requires the 'bootefi' command be enabled. Future work may tidy this up so that it can be used without CONFIG_CMDLINE being enabled. Signed-off-by: Simon Glass <sjg@chromium.org>
87 lines
1.8 KiB
C
87 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Bootmethod for EFI boot manager
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*
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* Copyright 2021 Google LLC
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* Written by Simon Glass <sjg@chromium.org>
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*/
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#define LOG_CATEGORY UCLASS_BOOTSTD
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#include <common.h>
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#include <bootdev.h>
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#include <bootflow.h>
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#include <bootmeth.h>
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#include <command.h>
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#include <dm.h>
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static int efi_mgr_check(struct udevice *dev, struct bootflow_iter *iter)
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{
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int ret;
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/* Must be an bootstd device */
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ret = bootflow_iter_uses_system(iter);
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if (ret)
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return log_msg_ret("net", ret);
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return 0;
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}
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static int efi_mgr_read_bootflow(struct udevice *dev, struct bootflow *bflow)
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{
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/*
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* Just assume there is something to boot since we don't have any way
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* of knowing in advance
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*/
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bflow->state = BOOTFLOWST_READY;
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return 0;
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}
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static int efi_mgr_read_file(struct udevice *dev, struct bootflow *bflow,
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const char *file_path, ulong addr, ulong *sizep)
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{
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/* Files are loaded by the 'bootefi bootmgr' command */
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return -ENOSYS;
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}
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static int efi_mgr_boot(struct udevice *dev, struct bootflow *bflow)
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{
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int ret;
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/* Booting is handled by the 'bootefi bootmgr' command */
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ret = run_command("bootefi bootmgr", 0);
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return 0;
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}
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static int bootmeth_efi_mgr_bind(struct udevice *dev)
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{
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struct bootmeth_uc_plat *plat = dev_get_uclass_plat(dev);
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plat->desc = "EFI bootmgr flow";
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return 0;
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}
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static struct bootmeth_ops efi_mgr_bootmeth_ops = {
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.check = efi_mgr_check,
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.read_bootflow = efi_mgr_read_bootflow,
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.read_file = efi_mgr_read_file,
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.boot = efi_mgr_boot,
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};
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static const struct udevice_id efi_mgr_bootmeth_ids[] = {
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{ .compatible = "u-boot,efi-bootmgr" },
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{ }
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};
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U_BOOT_DRIVER(bootmeth_zefi_mgr) = {
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.name = "bootmeth_efi_mgr",
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.id = UCLASS_BOOTMETH,
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.of_match = efi_mgr_bootmeth_ids,
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.ops = &efi_mgr_bootmeth_ops,
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.bind = bootmeth_efi_mgr_bind,
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};
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