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// SPDX-License-Identifier: GPL-2.0
/*
* EFI initialization
*
* Author: Jianmin Lv <lvjianmin@loongson.cn>
* Huacai Chen <chenhuacai@loongson.cn>
*
* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
*/
#include <linux/acpi.h>
#include <linux/efi.h>
#include <linux/efi-bgrt.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/export.h>
#include <linux/io.h>
#include <linux/kobject.h>
#include <linux/memblock.h>
#include <linux/reboot.h>
#include <linux/uaccess.h>
#include <asm/early_ioremap.h>
#include <asm/efi.h>
#include <asm/loongson.h>
static unsigned long efi_nr_tables;
static unsigned long efi_config_table;
static efi_system_table_t *efi_systab;
static efi_config_table_type_t arch_tables[] __initdata = {{},};
void __init efi_runtime_init(void)
{
if (!efi_enabled(EFI_BOOT))
return;
if (efi_runtime_disabled()) {
pr_info("EFI runtime services will be disabled.\n");
return;
}
efi.runtime = (efi_runtime_services_t *)efi_systab->runtime;
efi.runtime_version = (unsigned int)efi.runtime->hdr.revision;
efi_native_runtime_setup();
set_bit(EFI_RUNTIME_SERVICES, &efi.flags);
}
void __init efi_init(void)
{
int size;
void *config_tables;
if (!efi_system_table)
return;
efi_systab = (efi_system_table_t *)early_memremap_ro(efi_system_table, sizeof(*efi_systab));
if (!efi_systab) {
pr_err("Can't find EFI system table.\n");
return;
}
set_bit(EFI_64BIT, &efi.flags);
efi_nr_tables = efi_systab->nr_tables;
efi_config_table = (unsigned long)efi_systab->tables;
size = sizeof(efi_config_table_t);
config_tables = early_memremap(efi_config_table, efi_nr_tables * size);
efi_config_parse_tables(config_tables, efi_systab->nr_tables, arch_tables);
early_memunmap(config_tables, efi_nr_tables * size);
}
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