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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /arch/loongarch/kernel/efi.c | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/loongarch/kernel/efi.c')
-rw-r--r-- | arch/loongarch/kernel/efi.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/arch/loongarch/kernel/efi.c b/arch/loongarch/kernel/efi.c new file mode 100644 index 000000000..a31329971 --- /dev/null +++ b/arch/loongarch/kernel/efi.c @@ -0,0 +1,103 @@ +// 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 unsigned long __initdata boot_memmap = EFI_INVALID_TABLE_ADDR; + +static efi_system_table_t *efi_systab; +static efi_config_table_type_t arch_tables[] __initdata = { + {LINUX_EFI_BOOT_MEMMAP_GUID, &boot_memmap, "MEMMAP" }, + {}, +}; + +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; + struct efi_boot_memmap *tbl; + + 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; + } + + efi_systab_report_header(&efi_systab->hdr, efi_systab->fw_vendor); + + 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); + + set_bit(EFI_CONFIG_TABLES, &efi.flags); + + if (screen_info.orig_video_isVGA == VIDEO_TYPE_EFI) + memblock_reserve(screen_info.lfb_base, screen_info.lfb_size); + + if (boot_memmap == EFI_INVALID_TABLE_ADDR) + return; + + tbl = early_memremap_ro(boot_memmap, sizeof(*tbl)); + if (tbl) { + struct efi_memory_map_data data; + + data.phys_map = boot_memmap + sizeof(*tbl); + data.size = tbl->map_size; + data.desc_size = tbl->desc_size; + data.desc_version = tbl->desc_ver; + + if (efi_memmap_init_early(&data) < 0) + panic("Unable to map EFI memory map.\n"); + + early_memunmap(tbl, sizeof(*tbl)); + } +} |