104 lines
2.6 KiB
C
104 lines
2.6 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* EFI initialization
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*
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* Author: Jianmin Lv <lvjianmin@loongson.cn>
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* Huacai Chen <chenhuacai@loongson.cn>
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*
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* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
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*/
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#include <linux/acpi.h>
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#include <linux/efi.h>
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#include <linux/efi-bgrt.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/export.h>
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#include <linux/io.h>
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#include <linux/kobject.h>
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#include <linux/memblock.h>
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#include <linux/reboot.h>
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#include <linux/uaccess.h>
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#include <asm/early_ioremap.h>
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#include <asm/efi.h>
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#include <asm/loongson.h>
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static unsigned long efi_nr_tables;
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static unsigned long efi_config_table;
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static unsigned long __initdata boot_memmap = EFI_INVALID_TABLE_ADDR;
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static efi_system_table_t *efi_systab;
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static efi_config_table_type_t arch_tables[] __initdata = {
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{LINUX_EFI_BOOT_MEMMAP_GUID, &boot_memmap, "MEMMAP" },
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{},
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};
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void __init efi_runtime_init(void)
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{
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if (!efi_enabled(EFI_BOOT))
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return;
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if (efi_runtime_disabled()) {
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pr_info("EFI runtime services will be disabled.\n");
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return;
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}
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efi.runtime = (efi_runtime_services_t *)efi_systab->runtime;
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efi.runtime_version = (unsigned int)efi.runtime->hdr.revision;
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efi_native_runtime_setup();
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set_bit(EFI_RUNTIME_SERVICES, &efi.flags);
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}
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void __init efi_init(void)
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{
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int size;
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void *config_tables;
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struct efi_boot_memmap *tbl;
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if (!efi_system_table)
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return;
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efi_systab = (efi_system_table_t *)early_memremap_ro(efi_system_table, sizeof(*efi_systab));
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if (!efi_systab) {
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pr_err("Can't find EFI system table.\n");
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return;
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}
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efi_systab_report_header(&efi_systab->hdr, efi_systab->fw_vendor);
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set_bit(EFI_64BIT, &efi.flags);
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efi_nr_tables = efi_systab->nr_tables;
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efi_config_table = (unsigned long)efi_systab->tables;
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size = sizeof(efi_config_table_t);
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config_tables = early_memremap(efi_config_table, efi_nr_tables * size);
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efi_config_parse_tables(config_tables, efi_systab->nr_tables, arch_tables);
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early_memunmap(config_tables, efi_nr_tables * size);
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set_bit(EFI_CONFIG_TABLES, &efi.flags);
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if (screen_info.orig_video_isVGA == VIDEO_TYPE_EFI)
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memblock_reserve(screen_info.lfb_base, screen_info.lfb_size);
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if (boot_memmap == EFI_INVALID_TABLE_ADDR)
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return;
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tbl = early_memremap_ro(boot_memmap, sizeof(*tbl));
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if (tbl) {
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struct efi_memory_map_data data;
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data.phys_map = boot_memmap + sizeof(*tbl);
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data.size = tbl->map_size;
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data.desc_size = tbl->desc_size;
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data.desc_version = tbl->desc_ver;
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if (efi_memmap_init_early(&data) < 0)
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panic("Unable to map EFI memory map.\n");
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early_memunmap(tbl, sizeof(*tbl));
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}
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}
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