2022-04-25 05:31:17 +00:00
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* Bootmethod for distro boot via EFI
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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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#include <efi_loader.h>
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#include <fs.h>
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#include <malloc.h>
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#include <mapmem.h>
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#include <mmc.h>
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2023-01-17 17:47:55 +00:00
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#include <net.h>
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2022-04-25 05:31:17 +00:00
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#include <pxe_utils.h>
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#define EFI_DIRNAME "efi/boot/"
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/**
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* get_efi_leafname() - Get the leaf name for the EFI file we expect
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*
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* @str: Place to put leaf name for this architecture, e.g. "bootaa64.efi".
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* Must have at least 16 bytes of space
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* @max_len: Length of @str, must be >=16
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*/
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static int get_efi_leafname(char *str, int max_len)
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{
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const char *base;
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if (max_len < 16)
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return log_msg_ret("spc", -ENOSPC);
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if (IS_ENABLED(CONFIG_ARM64))
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base = "bootaa64";
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else if (IS_ENABLED(CONFIG_ARM))
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base = "bootarm";
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else if (IS_ENABLED(CONFIG_X86_RUN_32BIT))
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base = "bootia32";
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else if (IS_ENABLED(CONFIG_X86_RUN_64BIT))
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base = "bootx64";
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else if (IS_ENABLED(CONFIG_ARCH_RV32I))
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base = "bootriscv32";
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else if (IS_ENABLED(CONFIG_ARCH_RV64I))
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base = "bootriscv64";
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else if (IS_ENABLED(CONFIG_SANDBOX))
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base = "bootsbox";
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else
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return -EINVAL;
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strcpy(str, base);
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strcat(str, ".efi");
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return 0;
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}
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2023-01-17 17:47:55 +00:00
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static int get_efi_pxe_arch(void)
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{
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/* http://www.iana.org/assignments/dhcpv6-parameters/dhcpv6-parameters.xml */
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if (IS_ENABLED(CONFIG_ARM64))
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return 0xb;
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else if (IS_ENABLED(CONFIG_ARM))
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return 0xa;
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else if (IS_ENABLED(CONFIG_X86_64))
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return 0x6;
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else if (IS_ENABLED(CONFIG_X86))
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return 0x7;
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else if (IS_ENABLED(CONFIG_ARCH_RV32I))
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return 0x19;
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else if (IS_ENABLED(CONFIG_ARCH_RV64I))
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return 0x1b;
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else if (IS_ENABLED(CONFIG_SANDBOX))
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return 0; /* not used */
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return -EINVAL;
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}
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static int get_efi_pxe_vci(char *str, int max_len)
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{
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int ret;
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ret = get_efi_pxe_arch();
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if (ret < 0)
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return ret;
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snprintf(str, max_len, "PXEClient:Arch:%05x:UNDI:003000", ret);
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return 0;
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}
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2023-04-24 01:49:46 +00:00
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static void set_efi_bootdev(struct blk_desc *desc, struct bootflow *bflow)
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2022-04-25 05:31:17 +00:00
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{
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const struct udevice *media_dev;
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int size = bflow->size;
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const char *dev_name;
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char devnum_str[9];
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char dirname[200];
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char *last_slash;
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/*
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* This is a horrible hack to tell EFI about this boot device. Once we
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* unify EFI with the rest of U-Boot we can clean this up. The same hack
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* exists in multiple places, e.g. in the fs, tftp and load commands.
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*
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* Once we can clean up the EFI code to make proper use of driver model,
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* this can go away.
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*/
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media_dev = dev_get_parent(bflow->dev);
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bootstd: Use blk uclass device numbers to set efi bootdev
When loading a file from a block device, efiload_read_file
was using the seq_num of the device (e.g "35" of virtio_blk#35)
instead of the block device id (e.g what you get from running
the corresponding device scan command, like "virtio 0")
This cause EFI booting from these devices to fail as an
invalid device number is passed to blk_get_device_part_str:
Scanning bootdev 'virtio-blk#35.bootdev':
distro_efi_read_bootflow_file start (efi,fname=<NULL>)
distro_efi_read_bootflow_file start (efi,fname=<NULL>)
setting bootdev virtio, 35, efi/boot/bootaa64.efi, 00000000beef9a40, 170800
efi_dp_from_name calling blk_get_device_part_str
dev=virtio devnr=35 path=efi/boot/bootaa64.efi
blk_get_device_part_str (virtio,35)
blk_get_device_by_str (virtio, 35)
** Bad device specification virtio 35 **
Using default device tree: dtb/qemu-arm.dtb
No device tree available
0 efi ready virtio 1 virtio-blk#35.bootdev.par efi/boot/bootaa64.efi
** Booting bootflow 'virtio-blk#35.bootdev.part_1' with efi
blk_get_device_part_str (virtio,0:1)
blk_get_device_by_str (virtio, 0)
No UEFI binary known at beef9a40 (image buf=00000000beef9a40,addr=0000000000000000)
Boot failed (err=-22)
Signed-off-by: Mathew McBride <matt@traverse.com.au>
Signed-off-by: Simon Glass <sjg@chromium.org>
2023-04-24 01:49:50 +00:00
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snprintf(devnum_str, sizeof(devnum_str), "%x:%x",
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desc ? desc->devnum : dev_seq(media_dev),
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2023-04-24 01:49:46 +00:00
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bflow->part);
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2022-04-25 05:31:17 +00:00
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strlcpy(dirname, bflow->fname, sizeof(dirname));
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last_slash = strrchr(dirname, '/');
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if (last_slash)
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*last_slash = '\0';
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log_debug("setting bootdev %s, %s, %s, %p, %x\n",
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dev_get_uclass_name(media_dev), devnum_str, bflow->fname,
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bflow->buf, size);
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dev_name = device_get_uclass_id(media_dev) == UCLASS_MASS_STORAGE ?
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"usb" : dev_get_uclass_name(media_dev);
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efi_set_bootdev(dev_name, devnum_str, bflow->fname, bflow->buf, size);
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2023-04-24 01:49:46 +00:00
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}
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static int efiload_read_file(struct blk_desc *desc, struct bootflow *bflow)
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{
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int ret;
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ret = bootmeth_alloc_file(bflow, 0x2000000, 0x10000);
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if (ret)
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return log_msg_ret("read", ret);
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2022-04-25 05:31:17 +00:00
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return 0;
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}
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static int distro_efi_check(struct udevice *dev, struct bootflow_iter *iter)
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{
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2023-01-17 17:47:55 +00:00
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/* This only works on block and network devices */
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if (bootflow_iter_check_blk(iter) && bootflow_iter_check_net(iter))
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return log_msg_ret("blk", -ENOTSUPP);
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2022-04-25 05:31:17 +00:00
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2023-01-17 17:48:05 +00:00
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/* This works on block devices and network devices */
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if (iter->method_flags & BOOTFLOW_METHF_PXE_ONLY)
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return log_msg_ret("pxe", -ENOTSUPP);
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2022-04-25 05:31:17 +00:00
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return 0;
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}
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2023-02-22 19:17:04 +00:00
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/**
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* distro_efi_get_fdt_name() - Get the filename for reading the .dtb file
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*
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* @fname: Place to put filename
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* @size: Max size of filename
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* @seq: Sequence number, to cycle through options (0=first)
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* Returns: 0 on success, -ENOENT if the "fdtfile" env var does not exist,
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* -EINVAL if there are no more options, -EALREADY if the control FDT should be
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* used
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*/
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static int distro_efi_get_fdt_name(char *fname, int size, int seq)
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2023-01-17 17:47:57 +00:00
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{
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const char *fdt_fname;
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2023-02-22 19:17:04 +00:00
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const char *prefix;
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/* select the prefix */
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switch (seq) {
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case 0:
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/* this is the default */
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prefix = "/dtb";
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break;
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case 1:
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prefix = "";
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break;
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case 2:
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prefix = "/dtb/current";
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break;
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default:
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return log_msg_ret("pref", -EINVAL);
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}
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2023-01-17 17:47:57 +00:00
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fdt_fname = env_get("fdtfile");
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if (fdt_fname) {
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2023-02-22 19:17:04 +00:00
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snprintf(fname, size, "%s/%s", prefix, fdt_fname);
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2023-01-17 17:47:57 +00:00
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log_debug("Using device tree: %s\n", fname);
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2023-02-22 19:17:04 +00:00
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} else if (IS_ENABLED(CONFIG_OF_HAS_PRIOR_STAGE)) {
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strcpy(fname, "<prior>");
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return log_msg_ret("pref", -EALREADY);
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/* Use this fallback only for 32-bit ARM */
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} else if (IS_ENABLED(CONFIG_ARM) && !IS_ENABLED(CONFIG_ARM64)) {
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2023-01-17 17:47:57 +00:00
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const char *soc = env_get("soc");
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const char *board = env_get("board");
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const char *boardver = env_get("boardver");
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/* cf the code in label_boot() which seems very complex */
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2023-02-22 19:17:04 +00:00
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snprintf(fname, size, "%s/%s%s%s%s.dtb", prefix,
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2023-01-17 17:47:57 +00:00
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soc ? soc : "", soc ? "-" : "", board ? board : "",
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boardver ? boardver : "");
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log_debug("Using default device tree: %s\n", fname);
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2023-02-22 19:17:04 +00:00
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} else {
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return log_msg_ret("env", -ENOENT);
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2023-01-17 17:47:57 +00:00
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}
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2023-02-22 19:17:04 +00:00
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return 0;
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2023-01-17 17:47:57 +00:00
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}
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2023-01-17 17:47:55 +00:00
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static int distro_efi_read_bootflow_file(struct udevice *dev,
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struct bootflow *bflow)
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2022-04-25 05:31:17 +00:00
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{
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struct blk_desc *desc = NULL;
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2023-01-17 17:47:57 +00:00
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ulong fdt_addr, size;
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2023-01-17 17:47:55 +00:00
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char fname[256];
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2023-02-22 19:17:04 +00:00
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int ret, seq;
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2022-04-25 05:31:17 +00:00
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/* We require a partition table */
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if (!bflow->part)
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return -ENOENT;
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strcpy(fname, EFI_DIRNAME);
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ret = get_efi_leafname(fname + strlen(fname),
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sizeof(fname) - strlen(fname));
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if (ret)
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return log_msg_ret("leaf", ret);
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if (bflow->blk)
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desc = dev_get_uclass_plat(bflow->blk);
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ret = bootmeth_try_file(bflow, desc, NULL, fname);
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if (ret)
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return log_msg_ret("try", ret);
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ret = efiload_read_file(desc, bflow);
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if (ret)
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return log_msg_ret("read", -EINVAL);
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2023-02-22 19:17:04 +00:00
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fdt_addr = env_get_hex("fdt_addr_r", 0);
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/* try the various available names */
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ret = -ENOENT;
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2023-04-24 01:49:44 +00:00
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*fname = '\0';
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for (seq = 0; ret == -ENOENT; seq++) {
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2023-02-22 19:17:04 +00:00
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ret = distro_efi_get_fdt_name(fname, sizeof(fname), seq);
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2023-04-24 01:49:44 +00:00
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if (ret == -EALREADY)
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2023-02-22 19:17:04 +00:00
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bflow->flags = BOOTFLOWF_USE_PRIOR_FDT;
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2023-04-24 01:49:44 +00:00
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if (!ret)
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ret = bootmeth_common_read_file(dev, bflow, fname,
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fdt_addr, &size);
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2023-02-22 19:17:04 +00:00
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}
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2023-04-24 01:49:44 +00:00
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if (*fname) {
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bflow->fdt_fname = strdup(fname);
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if (!bflow->fdt_fname)
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return log_msg_ret("fil", -ENOMEM);
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}
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2023-01-17 17:47:57 +00:00
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if (!ret) {
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bflow->fdt_size = size;
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bflow->fdt_addr = fdt_addr;
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/*
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* TODO: Apply extension overlay
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*
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* Here we need to load and apply the extension overlay. This is
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* not implemented. See do_extension_apply(). The extension
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* stuff needs an implementation in boot/extension.c so it is
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* separate from the command code. Really the extension stuff
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* should use the device tree and a uclass / driver interface
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* rather than implementing its own list
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*/
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} else {
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log_debug("No device tree available\n");
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}
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2022-04-25 05:31:17 +00:00
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return 0;
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}
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2023-01-17 17:47:55 +00:00
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static int distro_efi_read_bootflow_net(struct bootflow *bflow)
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{
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2023-01-17 17:47:57 +00:00
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char file_addr[17], fname[256];
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char *tftp_argv[] = {"tftp", file_addr, fname, NULL};
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struct cmd_tbl cmdtp = {}; /* dummy */
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const char *addr_str, *fdt_addr_str;
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2023-01-17 17:47:55 +00:00
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int ret, arch, size;
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2023-01-17 17:47:57 +00:00
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ulong addr, fdt_addr;
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2023-01-17 17:47:55 +00:00
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char str[36];
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ret = get_efi_pxe_vci(str, sizeof(str));
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if (ret)
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return log_msg_ret("vci", ret);
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ret = get_efi_pxe_arch();
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if (ret < 0)
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return log_msg_ret("arc", ret);
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arch = ret;
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ret = env_set("bootp_vci", str);
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if (ret)
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return log_msg_ret("vcs", ret);
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ret = env_set_ulong("bootp_arch", arch);
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if (ret)
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return log_msg_ret("ars", ret);
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/* figure out the load address */
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addr_str = env_get("kernel_addr_r");
|
|
|
|
addr = addr_str ? hextoul(addr_str, NULL) : image_load_addr;
|
|
|
|
|
|
|
|
/* clear any previous bootfile */
|
|
|
|
env_set("bootfile", NULL);
|
|
|
|
|
|
|
|
/* read the kernel */
|
|
|
|
ret = dhcp_run(addr, NULL, true);
|
|
|
|
if (ret)
|
|
|
|
return log_msg_ret("dhc", ret);
|
|
|
|
|
|
|
|
size = env_get_hex("filesize", -1);
|
|
|
|
if (size <= 0)
|
|
|
|
return log_msg_ret("sz", -EINVAL);
|
|
|
|
bflow->size = size;
|
|
|
|
|
|
|
|
/* do the hideous EFI hack */
|
|
|
|
efi_set_bootdev("Net", "", bflow->fname, map_sysmem(addr, 0),
|
|
|
|
bflow->size);
|
|
|
|
|
2023-01-17 17:47:57 +00:00
|
|
|
/* read the DT file also */
|
|
|
|
fdt_addr_str = env_get("fdt_addr_r");
|
|
|
|
if (!fdt_addr_str)
|
|
|
|
return log_msg_ret("fdt", -EINVAL);
|
|
|
|
fdt_addr = hextoul(fdt_addr_str, NULL);
|
|
|
|
sprintf(file_addr, "%lx", fdt_addr);
|
|
|
|
|
2023-02-22 19:17:04 +00:00
|
|
|
/* We only allow the first prefix with PXE */
|
|
|
|
ret = distro_efi_get_fdt_name(fname, sizeof(fname), 0);
|
|
|
|
if (ret)
|
|
|
|
return log_msg_ret("nam", ret);
|
|
|
|
|
2023-01-17 17:47:57 +00:00
|
|
|
bflow->fdt_fname = strdup(fname);
|
|
|
|
if (!bflow->fdt_fname)
|
|
|
|
return log_msg_ret("fil", -ENOMEM);
|
|
|
|
|
|
|
|
if (!do_tftpb(&cmdtp, 0, 3, tftp_argv)) {
|
|
|
|
bflow->fdt_size = env_get_hex("filesize", 0);
|
|
|
|
bflow->fdt_addr = fdt_addr;
|
|
|
|
} else {
|
|
|
|
log_debug("No device tree available\n");
|
|
|
|
}
|
|
|
|
|
2023-01-17 17:47:55 +00:00
|
|
|
bflow->state = BOOTFLOWST_READY;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int distro_efi_read_bootflow(struct udevice *dev, struct bootflow *bflow)
|
|
|
|
{
|
|
|
|
const struct udevice *media = dev_get_parent(bflow->dev);
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
if (IS_ENABLED(CONFIG_CMD_DHCP) &&
|
|
|
|
device_get_uclass_id(media) == UCLASS_ETH) {
|
|
|
|
/* we only support reading from one device, so ignore 'dev' */
|
|
|
|
ret = distro_efi_read_bootflow_net(bflow);
|
|
|
|
if (ret)
|
|
|
|
return log_msg_ret("net", ret);
|
|
|
|
} else {
|
|
|
|
ret = distro_efi_read_bootflow_file(dev, bflow);
|
|
|
|
if (ret)
|
|
|
|
return log_msg_ret("blk", ret);
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2022-04-25 05:31:17 +00:00
|
|
|
int distro_efi_boot(struct udevice *dev, struct bootflow *bflow)
|
|
|
|
{
|
2023-01-17 17:47:57 +00:00
|
|
|
ulong kernel, fdt;
|
2022-04-25 05:31:17 +00:00
|
|
|
char cmd[50];
|
|
|
|
|
2023-01-17 17:47:57 +00:00
|
|
|
/* A non-zero buffer indicates the kernel is there */
|
|
|
|
if (bflow->buf) {
|
2023-04-24 01:49:46 +00:00
|
|
|
/* Set the EFI bootdev again, since reading an FDT loses it! */
|
|
|
|
if (bflow->blk) {
|
|
|
|
struct blk_desc *desc = dev_get_uclass_plat(bflow->blk);
|
|
|
|
|
|
|
|
set_efi_bootdev(desc, bflow);
|
|
|
|
}
|
|
|
|
|
2023-01-17 17:47:57 +00:00
|
|
|
kernel = (ulong)map_to_sysmem(bflow->buf);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* use the provided device tree if available, else fall back to
|
|
|
|
* the control FDT
|
|
|
|
*/
|
|
|
|
if (bflow->fdt_fname)
|
|
|
|
fdt = bflow->fdt_addr;
|
|
|
|
else
|
|
|
|
fdt = (ulong)map_to_sysmem(gd->fdt_blob);
|
|
|
|
} else {
|
|
|
|
/*
|
|
|
|
* This doesn't actually work for network devices:
|
|
|
|
*
|
|
|
|
* do_bootefi_image() No UEFI binary known at 0x02080000
|
|
|
|
*
|
|
|
|
* But this is the same behaviour for distro boot, so it can be
|
|
|
|
* fixed here.
|
|
|
|
*/
|
|
|
|
kernel = env_get_hex("kernel_addr_r", 0);
|
|
|
|
fdt = env_get_hex("fdt_addr_r", 0);
|
|
|
|
}
|
|
|
|
|
2022-04-25 05:31:17 +00:00
|
|
|
/*
|
|
|
|
* At some point we can add a real interface to bootefi so we can call
|
2023-01-17 17:47:57 +00:00
|
|
|
* this directly. For now, go through the CLI, like distro boot.
|
2022-04-25 05:31:17 +00:00
|
|
|
*/
|
2023-01-17 17:47:57 +00:00
|
|
|
snprintf(cmd, sizeof(cmd), "bootefi %lx %lx", kernel, fdt);
|
2022-04-25 05:31:17 +00:00
|
|
|
if (run_command(cmd, 0))
|
|
|
|
return log_msg_ret("run", -EINVAL);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int distro_bootmeth_efi_bind(struct udevice *dev)
|
|
|
|
{
|
|
|
|
struct bootmeth_uc_plat *plat = dev_get_uclass_plat(dev);
|
|
|
|
|
|
|
|
plat->desc = IS_ENABLED(CONFIG_BOOTSTD_FULL) ?
|
|
|
|
"EFI boot from an .efi file" : "EFI";
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct bootmeth_ops distro_efi_bootmeth_ops = {
|
|
|
|
.check = distro_efi_check,
|
|
|
|
.read_bootflow = distro_efi_read_bootflow,
|
|
|
|
.read_file = bootmeth_common_read_file,
|
|
|
|
.boot = distro_efi_boot,
|
|
|
|
};
|
|
|
|
|
|
|
|
static const struct udevice_id distro_efi_bootmeth_ids[] = {
|
|
|
|
{ .compatible = "u-boot,distro-efi" },
|
|
|
|
{ }
|
|
|
|
};
|
|
|
|
|
|
|
|
U_BOOT_DRIVER(bootmeth_efi) = {
|
|
|
|
.name = "bootmeth_efi",
|
|
|
|
.id = UCLASS_BOOTMETH,
|
|
|
|
.of_match = distro_efi_bootmeth_ids,
|
|
|
|
.ops = &distro_efi_bootmeth_ops,
|
|
|
|
.bind = distro_bootmeth_efi_bind,
|
|
|
|
};
|