ed4bb8d982
Move efi_get_distro_fdt_name() into lib/efi so it can be used from the app. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
154 lines
3.9 KiB
C
154 lines
3.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2022, Heinrich Schuchardt <xypron.glpk@gmx.de>
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*/
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#define LOG_CATEGORY LOGC_EFI
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#include <efi.h>
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#include <efi_load_initrd.h>
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#include <env.h>
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#include <errno.h>
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#undef BOOTEFI_NAME
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/*
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* The constants below come from:
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*
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* https://www.iana.org/assignments/dhcpv6-parameters/dhcpv6-parameters.xhtml#processor-architecture
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*/
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#if HOST_ARCH == HOST_ARCH_X86_64
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#define HOST_BOOTEFI_NAME "BOOTX64.EFI"
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#define HOST_PXE_ARCH 0x6
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#elif HOST_ARCH == HOST_ARCH_X86
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#define HOST_BOOTEFI_NAME "BOOTIA32.EFI"
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#define HOST_PXE_ARCH 0x7
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#elif HOST_ARCH == HOST_ARCH_AARCH64
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#define HOST_BOOTEFI_NAME "BOOTAA64.EFI"
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#define HOST_PXE_ARCH 0xb
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#elif HOST_ARCH == HOST_ARCH_ARM
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#define HOST_BOOTEFI_NAME "BOOTARM.EFI"
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#define HOST_PXE_ARCH 0xa
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#elif HOST_ARCH == HOST_ARCH_RISCV32
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#define HOST_BOOTEFI_NAME "BOOTRISCV32.EFI"
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#define HOST_PXE_ARCH 0x19
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#elif HOST_ARCH == HOST_ARCH_RISCV64
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#define HOST_BOOTEFI_NAME "BOOTRISCV64.EFI"
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#define HOST_PXE_ARCH 0x1b
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#else
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#error Unsupported Host architecture
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#endif
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#if defined(CONFIG_SANDBOX)
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#define BOOTEFI_NAME "BOOTSBOX.EFI"
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#elif defined(CONFIG_ARM64)
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#define BOOTEFI_NAME "BOOTAA64.EFI"
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#elif defined(CONFIG_ARM)
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#define BOOTEFI_NAME "BOOTARM.EFI"
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#elif defined(CONFIG_X86_64)
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#define BOOTEFI_NAME "BOOTX64.EFI"
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#elif defined(CONFIG_X86)
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#define BOOTEFI_NAME "BOOTIA32.EFI"
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#elif defined(CONFIG_ARCH_RV32I)
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#define BOOTEFI_NAME "BOOTRISCV32.EFI"
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#elif defined(CONFIG_ARCH_RV64I)
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#define BOOTEFI_NAME "BOOTRISCV64.EFI"
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#else
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#error Unsupported UEFI architecture
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#endif
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#if defined(CONFIG_CMD_EFIDEBUG) || defined(CONFIG_EFI_LOAD_FILE2_INITRD)
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/* GUID used by Linux to identify the LoadFile2 protocol with the initrd */
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const efi_guid_t efi_lf2_initrd_guid = EFI_INITRD_MEDIA_GUID;
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#endif
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const char *efi_get_basename(void)
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{
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return efi_use_host_arch() ? HOST_BOOTEFI_NAME : BOOTEFI_NAME;
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}
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int efi_get_pxe_arch(void)
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{
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if (efi_use_host_arch())
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return HOST_PXE_ARCH;
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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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return -EINVAL;
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}
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/**
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* efi_get_distro_fdt_name() - get the filename for reading the .dtb file
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*
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* @fname: buffer for filename
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* @size: buffer size
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* @seq: sequence number, to cycle through options (0=first)
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*
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* Returns:
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* 0 on success,
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* -ENOENT if the "fdtfile" env var does not exist,
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* -EINVAL if there are no more options,
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* -EALREADY if the control FDT should be used
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*/
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int efi_get_distro_fdt_name(char *fname, int size, int seq)
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{
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const char *fdt_fname;
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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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case 3:
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prefix = "/dtbs";
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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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fdt_fname = env_get("fdtfile");
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if (fdt_fname) {
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snprintf(fname, size, "%s/%s", prefix, fdt_fname);
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log_debug("Using device tree: %s\n", fname);
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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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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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snprintf(fname, size, "%s/%s%s%s%s.dtb", prefix,
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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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} else {
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return log_msg_ret("env", -ENOENT);
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}
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return 0;
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}
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