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-rw-r--r--arch/loongarch/kernel/efi-header.S99
-rw-r--r--arch/loongarch/kernel/efi.c3
-rw-r--r--arch/loongarch/kernel/head.S20
-rw-r--r--arch/loongarch/kernel/image-vars.h30
-rw-r--r--arch/loongarch/kernel/setup.c11
-rw-r--r--arch/loongarch/kernel/vmlinux.lds.S1
6 files changed, 154 insertions, 10 deletions
diff --git a/arch/loongarch/kernel/efi-header.S b/arch/loongarch/kernel/efi-header.S
new file mode 100644
index 000000000000..8c1d229a2afa
--- /dev/null
+++ b/arch/loongarch/kernel/efi-header.S
@@ -0,0 +1,99 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
+ */
+
+#include <linux/pe.h>
+#include <linux/sizes.h>
+
+ .macro __EFI_PE_HEADER
+ .long PE_MAGIC
+.Lcoff_header:
+ .short IMAGE_FILE_MACHINE_LOONGARCH64 /* Machine */
+ .short .Lsection_count /* NumberOfSections */
+ .long 0 /* TimeDateStamp */
+ .long 0 /* PointerToSymbolTable */
+ .long 0 /* NumberOfSymbols */
+ .short .Lsection_table - .Loptional_header /* SizeOfOptionalHeader */
+ .short IMAGE_FILE_DEBUG_STRIPPED | \
+ IMAGE_FILE_EXECUTABLE_IMAGE | \
+ IMAGE_FILE_LINE_NUMS_STRIPPED /* Characteristics */
+
+.Loptional_header:
+ .short PE_OPT_MAGIC_PE32PLUS /* PE32+ format */
+ .byte 0x02 /* MajorLinkerVersion */
+ .byte 0x14 /* MinorLinkerVersion */
+ .long __inittext_end - .Lefi_header_end /* SizeOfCode */
+ .long _end - __initdata_begin /* SizeOfInitializedData */
+ .long 0 /* SizeOfUninitializedData */
+ .long __efistub_efi_pe_entry - _head /* AddressOfEntryPoint */
+ .long .Lefi_header_end - _head /* BaseOfCode */
+
+.Lextra_header_fields:
+ .quad 0 /* ImageBase */
+ .long PECOFF_SEGMENT_ALIGN /* SectionAlignment */
+ .long PECOFF_FILE_ALIGN /* FileAlignment */
+ .short 0 /* MajorOperatingSystemVersion */
+ .short 0 /* MinorOperatingSystemVersion */
+ .short LINUX_EFISTUB_MAJOR_VERSION /* MajorImageVersion */
+ .short LINUX_EFISTUB_MINOR_VERSION /* MinorImageVersion */
+ .short 0 /* MajorSubsystemVersion */
+ .short 0 /* MinorSubsystemVersion */
+ .long 0 /* Win32VersionValue */
+
+ .long _end - _head /* SizeOfImage */
+
+ /* Everything before the kernel image is considered part of the header */
+ .long .Lefi_header_end - _head /* SizeOfHeaders */
+ .long 0 /* CheckSum */
+ .short IMAGE_SUBSYSTEM_EFI_APPLICATION /* Subsystem */
+ .short 0 /* DllCharacteristics */
+ .quad 0 /* SizeOfStackReserve */
+ .quad 0 /* SizeOfStackCommit */
+ .quad 0 /* SizeOfHeapReserve */
+ .quad 0 /* SizeOfHeapCommit */
+ .long 0 /* LoaderFlags */
+ .long (.Lsection_table - .) / 8 /* NumberOfRvaAndSizes */
+
+ .quad 0 /* ExportTable */
+ .quad 0 /* ImportTable */
+ .quad 0 /* ResourceTable */
+ .quad 0 /* ExceptionTable */
+ .quad 0 /* CertificationTable */
+ .quad 0 /* BaseRelocationTable */
+
+ /* Section table */
+.Lsection_table:
+ .ascii ".text\0\0\0"
+ .long __inittext_end - .Lefi_header_end /* VirtualSize */
+ .long .Lefi_header_end - _head /* VirtualAddress */
+ .long __inittext_end - .Lefi_header_end /* SizeOfRawData */
+ .long .Lefi_header_end - _head /* PointerToRawData */
+
+ .long 0 /* PointerToRelocations */
+ .long 0 /* PointerToLineNumbers */
+ .short 0 /* NumberOfRelocations */
+ .short 0 /* NumberOfLineNumbers */
+ .long IMAGE_SCN_CNT_CODE | \
+ IMAGE_SCN_MEM_READ | \
+ IMAGE_SCN_MEM_EXECUTE /* Characteristics */
+
+ .ascii ".data\0\0\0"
+ .long _end - __initdata_begin /* VirtualSize */
+ .long __initdata_begin - _head /* VirtualAddress */
+ .long _edata - __initdata_begin /* SizeOfRawData */
+ .long __initdata_begin - _head /* PointerToRawData */
+
+ .long 0 /* PointerToRelocations */
+ .long 0 /* PointerToLineNumbers */
+ .short 0 /* NumberOfRelocations */
+ .short 0 /* NumberOfLineNumbers */
+ .long IMAGE_SCN_CNT_INITIALIZED_DATA | \
+ IMAGE_SCN_MEM_READ | \
+ IMAGE_SCN_MEM_WRITE /* Characteristics */
+
+ .set .Lsection_count, (. - .Lsection_table) / 40
+
+ .balign 0x10000 /* PECOFF_SEGMENT_ALIGN */
+.Lefi_header_end:
+ .endm
diff --git a/arch/loongarch/kernel/efi.c b/arch/loongarch/kernel/efi.c
index a50b60c587fa..1f1f755fb425 100644
--- a/arch/loongarch/kernel/efi.c
+++ b/arch/loongarch/kernel/efi.c
@@ -69,4 +69,7 @@ void __init efi_init(void)
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);
+
+ if (screen_info.orig_video_isVGA == VIDEO_TYPE_EFI)
+ memblock_reserve(screen_info.lfb_base, screen_info.lfb_size);
}
diff --git a/arch/loongarch/kernel/head.S b/arch/loongarch/kernel/head.S
index c60eb66793e3..01bac62a6442 100644
--- a/arch/loongarch/kernel/head.S
+++ b/arch/loongarch/kernel/head.S
@@ -12,6 +12,26 @@
#include <asm/loongarch.h>
#include <asm/stackframe.h>
+#ifdef CONFIG_EFI_STUB
+
+#include "efi-header.S"
+
+ __HEAD
+
+_head:
+ .word MZ_MAGIC /* "MZ", MS-DOS header */
+ .org 0x3c /* 0x04 ~ 0x3b reserved */
+ .long pe_header - _head /* Offset to the PE header */
+
+pe_header:
+ __EFI_PE_HEADER
+
+SYM_DATA(kernel_asize, .long _end - _text);
+SYM_DATA(kernel_fsize, .long _edata - _text);
+SYM_DATA(kernel_offset, .long kernel_offset - _text);
+
+#endif
+
__REF
SYM_CODE_START(kernel_entry) # kernel entry point
diff --git a/arch/loongarch/kernel/image-vars.h b/arch/loongarch/kernel/image-vars.h
new file mode 100644
index 000000000000..c901ebb903f2
--- /dev/null
+++ b/arch/loongarch/kernel/image-vars.h
@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
+ */
+#ifndef __LOONGARCH_KERNEL_IMAGE_VARS_H
+#define __LOONGARCH_KERNEL_IMAGE_VARS_H
+
+#ifdef CONFIG_EFI_STUB
+
+__efistub_memcmp = memcmp;
+__efistub_memchr = memchr;
+__efistub_memcpy = memcpy;
+__efistub_memmove = memmove;
+__efistub_memset = memset;
+__efistub_strcat = strcat;
+__efistub_strcmp = strcmp;
+__efistub_strlen = strlen;
+__efistub_strncat = strncat;
+__efistub_strnstr = strnstr;
+__efistub_strnlen = strnlen;
+__efistub_strrchr = strrchr;
+__efistub_kernel_entry = kernel_entry;
+__efistub_kernel_asize = kernel_asize;
+__efistub_kernel_fsize = kernel_fsize;
+__efistub_kernel_offset = kernel_offset;
+__efistub_screen_info = screen_info;
+
+#endif
+
+#endif /* __LOONGARCH_KERNEL_IMAGE_VARS_H */
diff --git a/arch/loongarch/kernel/setup.c b/arch/loongarch/kernel/setup.c
index 8f5c2f9a1a83..e8714b1d94c8 100644
--- a/arch/loongarch/kernel/setup.c
+++ b/arch/loongarch/kernel/setup.c
@@ -49,9 +49,7 @@
#define SMBIOS_CORE_PACKAGE_OFFSET 0x23
#define LOONGSON_EFI_ENABLE (1 << 3)
-#ifdef CONFIG_VT
-struct screen_info screen_info;
-#endif
+struct screen_info screen_info __section(".data");
unsigned long fw_arg0, fw_arg1;
DEFINE_PER_CPU(unsigned long, kernelsp);
@@ -122,16 +120,9 @@ static void __init parse_cpu_table(const struct dmi_header *dm)
static void __init parse_bios_table(const struct dmi_header *dm)
{
- int bios_extern;
char *dmi_data = (char *)dm;
- bios_extern = *(dmi_data + SMBIOS_BIOSEXTERN_OFFSET);
b_info.bios_size = (*(dmi_data + SMBIOS_BIOSSIZE_OFFSET) + 1) << 6;
-
- if (bios_extern & LOONGSON_EFI_ENABLE)
- set_bit(EFI_BOOT, &efi.flags);
- else
- clear_bit(EFI_BOOT, &efi.flags);
}
static void __init find_tokens(const struct dmi_header *dm, void *dummy)
diff --git a/arch/loongarch/kernel/vmlinux.lds.S b/arch/loongarch/kernel/vmlinux.lds.S
index 69c76f26c1c5..36d042739f3c 100644
--- a/arch/loongarch/kernel/vmlinux.lds.S
+++ b/arch/loongarch/kernel/vmlinux.lds.S
@@ -12,6 +12,7 @@
#define BSS_FIRST_SECTIONS *(.bss..swapper_pg_dir)
#include <asm-generic/vmlinux.lds.h>
+#include "image-vars.h"
/*
* Max avaliable Page Size is 64K, so we set SectionAlignment
generated by cgit (git 2.34.1) at 2025-03-21 14:49:01 +0000