Initial commit

.gitignore

@@ -0,0 +1,6 @@
+obj/
+bin/
+iso_root/
+image.iso
+image.hdd
+limine/

.gitlab-ci.yml

@@ -0,0 +1,26 @@
+stages:
+  - build
+  - package
+
+image: debian:latest
+
+before_script:
+  - apt update
+  - apt install -y build-essential gcc mtools git xorriso gdisk make
+
+build_kernel:
+  stage: build
+  script:
+    - make -j$(nproc) bin/kumios
+  artifacts:
+    paths:
+      - bin/kumios
+
+build_iso:
+  stage: package
+  script:
+    - make -j$(nproc) iso
+  artifacts:
+    paths:
+      - bin/kumios.iso
+

GNUmakefile

@@ -0,0 +1,189 @@
+# Nuke built-in rules and variables.
+override MAKEFLAGS += -rR
+ 
+# This is the name that our final kernel executable will have.
+# Change as needed.
+override KERNEL := kumios
+ 
+# Convenience macro to reliably declare user overridable variables.
+define DEFAULT_VAR =
+	ifeq ($(origin $1),default)
+		override $(1) := $(2)
+	endif
+	ifeq ($(origin $1),undefined)
+		override $(1) := $(2)
+	endif
+endef
+ 
+# It is suggested to use a custom built cross toolchain to build a kernel.
+# We are using the standard "cc" here, it may work by using
+# the host system's toolchain, but this is not guaranteed.
+override DEFAULT_CC := cc
+$(eval $(call DEFAULT_VAR,CC,$(DEFAULT_CC)))
+ 
+# Same thing for "ld" (the linker).
+override DEFAULT_LD := ld
+$(eval $(call DEFAULT_VAR,LD,$(DEFAULT_LD)))
+ 
+# User controllable C flags.
+override DEFAULT_CFLAGS := -g -O2 -pipe
+$(eval $(call DEFAULT_VAR,CFLAGS,$(DEFAULT_CFLAGS)))
+ 
+# User controllable C preprocessor flags. We set none by default.
+override DEFAULT_CPPFLAGS :=
+$(eval $(call DEFAULT_VAR,CPPFLAGS,$(DEFAULT_CPPFLAGS)))
+ 
+# User controllable nasm flags.
+override DEFAULT_NASMFLAGS := -F dwarf -g
+$(eval $(call DEFAULT_VAR,NASMFLAGS,$(DEFAULT_NASMFLAGS)))
+ 
+# User controllable linker flags. We set none by default.
+override DEFAULT_LDFLAGS :=
+$(eval $(call DEFAULT_VAR,LDFLAGS,$(DEFAULT_LDFLAGS)))
+ 
+# Internal C flags that should not be changed by the user.
+override CFLAGS += \
+	-Wall \
+	-Wextra \
+	-std=gnu11 \
+	-ffreestanding \
+	-fno-stack-protector \
+	-fno-stack-check \
+	-fno-lto \
+	-fPIE \
+	-m64 \
+	-march=x86-64 \
+	-mno-80387 \
+	-mno-mmx \
+	-mno-sse \
+	-mno-sse2 \
+	-mno-red-zone
+ 
+# Internal C preprocessor flags that should not be changed by the user.
+override CPPFLAGS := \
+	-I src \
+	$(CPPFLAGS) \
+	-MMD \
+	-MP
+ 
+# Internal linker flags that should not be changed by the user.
+override LDFLAGS += \
+	-m elf_x86_64 \
+	-nostdlib \
+	-static \
+	-pie \
+	--no-dynamic-linker \
+	-z text \
+	-z max-page-size=0x1000 \
+	-T linker.ld
+ 
+# Internal nasm flags that should not be changed by the user.
+override NASMFLAGS += \
+	-Wall \
+	-f elf64
+ 
+# Use "find" to glob all *.c, *.S, and *.asm files in the tree and obtain the
+# object and header dependency file names.
+override CFILES := $(shell cd src && find -L * -type f -name '*.c')
+override ASFILES := $(shell cd src && find -L * -type f -name '*.S')
+override NASMFILES := $(shell cd src && find -L * -type f -name '*.asm')
+override OBJ := $(addprefix obj/,$(CFILES:.c=.c.o) $(ASFILES:.S=.S.o) $(NASMFILES:.asm=.asm.o))
+override HEADER_DEPS := $(addprefix obj/,$(CFILES:.c=.c.d) $(ASFILES:.S=.S.d))
+ 
+# Default target.
+.PHONY: all
+all: bin/$(KERNEL) iso hdd
+ 
+# Link rules for the final kernel executable.
+bin/$(KERNEL): GNUmakefile linker.ld $(OBJ)
+	mkdir -p "$$(dirname $@)"
+	$(LD) $(OBJ) $(LDFLAGS) -o $@
+ 
+# Include header dependencies.
+-include $(HEADER_DEPS)
+ 
+# Compilation rules for *.c files.
+obj/%.c.o: src/%.c GNUmakefile
+	mkdir -p "$$(dirname $@)"
+	$(CC) $(CFLAGS) $(CPPFLAGS) -c $< -o $@
+ 
+# Compilation rules for *.S files.
+obj/%.S.o: src/%.S GNUmakefile
+	mkdir -p "$$(dirname $@)"
+	$(CC) $(CFLAGS) $(CPPFLAGS) -c $< -o $@
+ 
+# Compilation rules for *.asm (nasm) files.
+obj/%.asm.o: src/%.asm GNUmakefile
+	mkdir -p "$$(dirname $@)"
+	nasm $(NASMFLAGS) $< -o $@
+ 
+# Remove object files and the final executable.
+.PHONY: clean
+clean:
+	rm -rf bin obj iso_root image.iso image.hdd limine
+
+# The `iso` target builds the bootable ISO image using Limine.
+.PHONY: iso
+iso: bin/$(KERNEL)
+	# Clone the Limine repository
+	git clone https://github.com/limine-bootloader/limine.git --branch=v6.x-branch-binary --depth=1
+
+	# Build the Limine bootloader binaries.
+	$(MAKE) -C limine
+
+	# Create the iso_root directory and copy relevant files.
+	mkdir -p iso_root
+	cp -v bin/$(KERNEL) limine.cfg limine/limine-bios.sys limine/limine-bios-cd.bin limine/limine-uefi-cd.bin iso_root/
+
+	# Create the EFI boot directory and copy EFI executables.
+	mkdir -p iso_root/EFI/BOOT
+	cp -v limine/BOOTX64.EFI iso_root/EFI/BOOT/
+	cp -v limine/BOOTIA32.EFI iso_root/EFI/BOOT/
+
+	# Create the bootable ISO.
+	xorriso -as mkisofs -b limine-bios-cd.bin -no-emul-boot \
+			-boot-load-size 4 -boot-info-table --efi-boot limine-uefi-cd.bin \
+			-efi-boot-part --efi-boot-image --protective-msdos-label \
+			iso_root -o image.iso
+
+	# Install Limine stage 1 and 2 for legacy BIOS boot.
+	./limine/limine bios-install image.iso
+
+	mv image.iso bin/$(KERNEL).iso
+
+	@echo "Bootable ISO created as bin/$(KERNEL).iso"
+
+# The `hdd` target builds the bootable HDD image using Limine.
+.PHONY: hdd
+hdd: bin/$(KERNEL)
+	# Create empty HDD image file.
+	dd if=/dev/zero bs=1M count=0 seek=64 of=image.hdd
+
+	# Create GPT partition.
+	sgdisk image.hdd -n 1:2048 -t 1:ef00
+
+	# Clone Limine if it doesn't already exist.
+	if [ ! -d "limine" ]; then \
+		git clone https://github.com/limine-bootloader/limine.git --branch=v6.x-branch-binary --depth=1; \
+	fi
+
+	# Build the Limine bootloader binaries, if not already built.
+	$(MAKE) -C limine
+
+	# Install Limine BIOS stages.
+	./limine/limine bios-install image.hdd
+
+	# Format the partition to fat32 filesystem.
+	mformat -i image.hdd@@1M -F ::
+
+	# Create directory structure in HDD image.
+	mmd -i image.hdd@@1M ::/EFI ::/EFI/BOOT
+
+	# Copy kernel and Limine config over to the HDD image.
+	mcopy -i image.hdd@@1M bin/$(KERNEL) limine.cfg limine/limine-bios.sys ::/
+	mcopy -i image.hdd@@1M limine/BOOTX64.EFI ::/EFI/BOOT
+	mcopy -i image.hdd@@1M limine/BOOTIA32.EFI ::/EFI/BOOT
+
+	mv image.hdd bin/$(KERNEL).hdd
+
+	@echo "Bootable HDD image created as bin/$(KERNEL).hdd"

limine.cfg

@@ -0,0 +1,19 @@
+# Timeout in seconds that Limine will use before automatically booting.
+TIMEOUT=5
+ 
+# The entry name that will be displayed in the boot menu.
+:myOS (KASLR on)
+    # We use the Limine boot protocol.
+    PROTOCOL=limine
+ 
+    # Path to the kernel to boot. boot:/// represents the partition on which limine.cfg is located.
+    KERNEL_PATH=boot:///myos
+ 
+# Same thing, but without KASLR.
+:myOS (KASLR off)
+    PROTOCOL=limine
+ 
+    # Disable KASLR (it is enabled by default for relocatable kernels)
+    KASLR=no
+ 
+    KERNEL_PATH=boot:///myos

linker.ld

@@ -0,0 +1,63 @@
+/* Tell the linker that we want an x86_64 ELF64 output file */
+OUTPUT_FORMAT(elf64-x86-64)
+OUTPUT_ARCH(i386:x86-64)
+ 
+/* We want the symbol _start to be our entry point */
+ENTRY(_start)
+ 
+/* Define the program headers we want so the bootloader gives us the right */
+/* MMU permissions */
+PHDRS
+{
+    text    PT_LOAD    FLAGS((1 << 0) | (1 << 2)) ; /* Execute + Read */
+    rodata  PT_LOAD    FLAGS((1 << 2)) ;            /* Read only */
+    data    PT_LOAD    FLAGS((1 << 1) | (1 << 2)) ; /* Write + Read */
+    dynamic PT_DYNAMIC FLAGS((1 << 1) | (1 << 2)) ; /* Dynamic PHDR for relocations */
+}
+ 
+SECTIONS
+{
+    /* We wanna be placed in the topmost 2GiB of the address space, for optimisations */
+    /* and because that is what the Limine spec mandates. */
+    /* Any address in this region will do, but often 0xffffffff80000000 is chosen as */
+    /* that is the beginning of the region. */
+    . = 0xffffffff80000000;
+ 
+    .text : {
+        *(.text .text.*)
+    } :text
+ 
+    /* Move to the next memory page for .rodata */
+    . += CONSTANT(MAXPAGESIZE);
+ 
+    .rodata : {
+        *(.rodata .rodata.*)
+    } :rodata
+ 
+    /* Move to the next memory page for .data */
+    . += CONSTANT(MAXPAGESIZE);
+ 
+    .data : {
+        *(.data .data.*)
+    } :data
+ 
+    /* Dynamic section for relocations, both in its own PHDR and inside data PHDR */
+    .dynamic : {
+        *(.dynamic)
+    } :data :dynamic
+ 
+    /* NOTE: .bss needs to be the last thing mapped to :data, otherwise lots of */
+    /* unnecessary zeros will be written to the binary. */
+    /* If you need, for example, .init_array and .fini_array, those should be placed */
+    /* above this. */
+    .bss : {
+        *(.bss .bss.*)
+        *(COMMON)
+    } :data
+ 
+    /* Discard .note.* and .eh_frame since they may cause issues on some hosts. */
+    /DISCARD/ : {
+        *(.eh_frame)
+        *(.note .note.*)
+    }
+}

src/kernel.c

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+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+#include <limine.h>
+ 
+// Set the base revision to 1, this is recommended as this is the latest
+// base revision described by the Limine boot protocol specification.
+// See specification for further info.
+ 
+LIMINE_BASE_REVISION(1)
+ 
+// The Limine requests can be placed anywhere, but it is important that
+// the compiler does not optimise them away, so, in C, they should
+// NOT be made "static".
+ 
+struct limine_framebuffer_request framebuffer_request = {
+    .id = LIMINE_FRAMEBUFFER_REQUEST,
+    .revision = 0
+};
+ 
+// GCC and Clang reserve the right to generate calls to the following
+// 4 functions even if they are not directly called.
+// Implement them as the C specification mandates.
+// DO NOT remove or rename these functions, or stuff will eventually break!
+// They CAN be moved to a different .c file.
+ 
+void *memcpy(void *dest, const void *src, size_t n) {
+    uint8_t *pdest = (uint8_t *)dest;
+    const uint8_t *psrc = (const uint8_t *)src;
+ 
+    for (size_t i = 0; i < n; i++) {
+        pdest[i] = psrc[i];
+    }
+ 
+    return dest;
+}
+ 
+void *memset(void *s, int c, size_t n) {
+    uint8_t *p = (uint8_t *)s;
+ 
+    for (size_t i = 0; i < n; i++) {
+        p[i] = (uint8_t)c;
+    }
+ 
+    return s;
+}
+ 
+void *memmove(void *dest, const void *src, size_t n) {
+    uint8_t *pdest = (uint8_t *)dest;
+    const uint8_t *psrc = (const uint8_t *)src;
+ 
+    if (src > dest) {
+        for (size_t i = 0; i < n; i++) {
+            pdest[i] = psrc[i];
+        }
+    } else if (src < dest) {
+        for (size_t i = n; i > 0; i--) {
+            pdest[i-1] = psrc[i-1];
+        }
+    }
+ 
+    return dest;
+}
+ 
+int memcmp(const void *s1, const void *s2, size_t n) {
+    const uint8_t *p1 = (const uint8_t *)s1;
+    const uint8_t *p2 = (const uint8_t *)s2;
+ 
+    for (size_t i = 0; i < n; i++) {
+        if (p1[i] != p2[i]) {
+            return p1[i] < p2[i] ? -1 : 1;
+        }
+    }
+ 
+    return 0;
+}
+ 
+// Halt and catch fire function.
+static void hcf(void) {
+    asm ("cli");
+    for (;;) {
+        asm ("hlt");
+    }
+}
+ 
+// The following will be our kernel's entry point.
+// If renaming _start() to something else, make sure to change the
+// linker script accordingly.
+void _start(void) {
+    // Ensure the bootloader actually understands our base revision (see spec).
+    if (LIMINE_BASE_REVISION_SUPPORTED == false) {
+        hcf();
+    }
+ 
+    // Ensure we got a framebuffer.
+    if (framebuffer_request.response == NULL
+     || framebuffer_request.response->framebuffer_count < 1) {
+        hcf();
+    }
+ 
+    // Fetch the first framebuffer.
+    struct limine_framebuffer *framebuffer = framebuffer_request.response->framebuffers[0];
+ 
+    // Note: we assume the framebuffer model is RGB with 32-bit pixels.
+    for (size_t i = 0; i < 100; i++) {
+        uint32_t *fb_ptr = framebuffer->address;
+        fb_ptr[i * (framebuffer->pitch / 4) + i] = 0xffffff;
+    }
+ 
+    // We're done, just hang...
+    hcf();
+}

src/limine.h

@@ -0,0 +1,579 @@
+/* BSD Zero Clause License */
+
+/* Copyright (C) 2022-2023 mintsuki and contributors.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef _LIMINE_H
+#define _LIMINE_H 1
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdint.h>
+
+/* Misc */
+
+#ifdef LIMINE_NO_POINTERS
+#  define LIMINE_PTR(TYPE) uint64_t
+#else
+#  define LIMINE_PTR(TYPE) TYPE
+#endif
+
+#ifdef __GNUC__
+#  define LIMINE_DEPRECATED __attribute__((__deprecated__))
+#  define LIMINE_DEPRECATED_IGNORE_START \
+    _Pragma("GCC diagnostic push") \
+    _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"")
+#  define LIMINE_DEPRECATED_IGNORE_END \
+    _Pragma("GCC diagnostic pop")
+#else
+#  define LIMINE_DEPRECATED
+#  define LIMINE_DEPRECATED_IGNORE_START
+#  define LIMINE_DEPRECATED_IGNORE_END
+#endif
+
+#define LIMINE_BASE_REVISION(N) \
+    uint64_t limine_base_revision[3] = { 0xf9562b2d5c95a6c8, 0x6a7b384944536bdc, (N) };
+
+#define LIMINE_BASE_REVISION_SUPPORTED (limine_base_revision[2] == 0)
+
+#define LIMINE_COMMON_MAGIC 0xc7b1dd30df4c8b88, 0x0a82e883a194f07b
+
+struct limine_uuid {
+    uint32_t a;
+    uint16_t b;
+    uint16_t c;
+    uint8_t d[8];
+};
+
+#define LIMINE_MEDIA_TYPE_GENERIC 0
+#define LIMINE_MEDIA_TYPE_OPTICAL 1
+#define LIMINE_MEDIA_TYPE_TFTP 2
+
+struct limine_file {
+    uint64_t revision;
+    LIMINE_PTR(void *) address;
+    uint64_t size;
+    LIMINE_PTR(char *) path;
+    LIMINE_PTR(char *) cmdline;
+    uint32_t media_type;
+    uint32_t unused;
+    uint32_t tftp_ip;
+    uint32_t tftp_port;
+    uint32_t partition_index;
+    uint32_t mbr_disk_id;
+    struct limine_uuid gpt_disk_uuid;
+    struct limine_uuid gpt_part_uuid;
+    struct limine_uuid part_uuid;
+};
+
+/* Boot info */
+
+#define LIMINE_BOOTLOADER_INFO_REQUEST { LIMINE_COMMON_MAGIC, 0xf55038d8e2a1202f, 0x279426fcf5f59740 }
+
+struct limine_bootloader_info_response {
+    uint64_t revision;
+    LIMINE_PTR(char *) name;
+    LIMINE_PTR(char *) version;
+};
+
+struct limine_bootloader_info_request {
+    uint64_t id[4];
+    uint64_t revision;
+    LIMINE_PTR(struct limine_bootloader_info_response *) response;
+};
+
+/* Stack size */
+
+#define LIMINE_STACK_SIZE_REQUEST { LIMINE_COMMON_MAGIC, 0x224ef0460a8e8926, 0xe1cb0fc25f46ea3d }
+
+struct limine_stack_size_response {
+    uint64_t revision;
+};
+
+struct limine_stack_size_request {
+    uint64_t id[4];
+    uint64_t revision;
+    LIMINE_PTR(struct limine_stack_size_response *) response;
+    uint64_t stack_size;
+};
+
+/* HHDM */
+
+#define LIMINE_HHDM_REQUEST { LIMINE_COMMON_MAGIC, 0x48dcf1cb8ad2b852, 0x63984e959a98244b }
+
+struct limine_hhdm_response {
+    uint64_t revision;
+    uint64_t offset;
+};
+
+struct limine_hhdm_request {
+    uint64_t id[4];
+    uint64_t revision;
+    LIMINE_PTR(struct limine_hhdm_response *) response;
+};
+
+/* Framebuffer */
+
+#define LIMINE_FRAMEBUFFER_REQUEST { LIMINE_COMMON_MAGIC, 0x9d5827dcd881dd75, 0xa3148604f6fab11b }
+
+#define LIMINE_FRAMEBUFFER_RGB 1
+
+struct limine_video_mode {
+    uint64_t pitch;
+    uint64_t width;
+    uint64_t height;
+    uint16_t bpp;
+    uint8_t memory_model;
+    uint8_t red_mask_size;
+    uint8_t red_mask_shift;
+    uint8_t green_mask_size;
+    uint8_t green_mask_shift;
+    uint8_t blue_mask_size;
+    uint8_t blue_mask_shift;
+};
+
+struct limine_framebuffer {
+    LIMINE_PTR(void *) address;
+    uint64_t width;
+    uint64_t height;
+    uint64_t pitch;
+    uint16_t bpp;
+    uint8_t memory_model;
+    uint8_t red_mask_size;
+    uint8_t red_mask_shift;
+    uint8_t green_mask_size;
+    uint8_t green_mask_shift;
+    uint8_t blue_mask_size;
+    uint8_t blue_mask_shift;
+    uint8_t unused[7];
+    uint64_t edid_size;
+    LIMINE_PTR(void *) edid;
+    /* Response revision 1 */
+    uint64_t mode_count;
+    LIMINE_PTR(struct limine_video_mode **) modes;
+};
+
+struct limine_framebuffer_response {
+    uint64_t revision;
+    uint64_t framebuffer_count;
+    LIMINE_PTR(struct limine_framebuffer **) framebuffers;
+};
+
+struct limine_framebuffer_request {
+    uint64_t id[4];
+    uint64_t revision;
+    LIMINE_PTR(struct limine_framebuffer_response *) response;
+};
+
+/* Terminal */
+
+#define LIMINE_TERMINAL_REQUEST { LIMINE_COMMON_MAGIC, 0xc8ac59310c2b0844, 0xa68d0c7265d38878 }
+
+#define LIMINE_TERMINAL_CB_DEC 10
+#define LIMINE_TERMINAL_CB_BELL 20
+#define LIMINE_TERMINAL_CB_PRIVATE_ID 30
+#define LIMINE_TERMINAL_CB_STATUS_REPORT 40
+#define LIMINE_TERMINAL_CB_POS_REPORT 50
+#define LIMINE_TERMINAL_CB_KBD_LEDS 60
+#define LIMINE_TERMINAL_CB_MODE 70
+#define LIMINE_TERMINAL_CB_LINUX 80
+
+#define LIMINE_TERMINAL_CTX_SIZE ((uint64_t)(-1))
+#define LIMINE_TERMINAL_CTX_SAVE ((uint64_t)(-2))
+#define LIMINE_TERMINAL_CTX_RESTORE ((uint64_t)(-3))
+#define LIMINE_TERMINAL_FULL_REFRESH ((uint64_t)(-4))
+
+/* Response revision 1 */
+#define LIMINE_TERMINAL_OOB_OUTPUT_GET ((uint64_t)(-10))
+#define LIMINE_TERMINAL_OOB_OUTPUT_SET ((uint64_t)(-11))
+
+#define LIMINE_TERMINAL_OOB_OUTPUT_OCRNL (1 << 0)
+#define LIMINE_TERMINAL_OOB_OUTPUT_OFDEL (1 << 1)
+#define LIMINE_TERMINAL_OOB_OUTPUT_OFILL (1 << 2)
+#define LIMINE_TERMINAL_OOB_OUTPUT_OLCUC (1 << 3)
+#define LIMINE_TERMINAL_OOB_OUTPUT_ONLCR (1 << 4)
+#define LIMINE_TERMINAL_OOB_OUTPUT_ONLRET (1 << 5)
+#define LIMINE_TERMINAL_OOB_OUTPUT_ONOCR (1 << 6)
+#define LIMINE_TERMINAL_OOB_OUTPUT_OPOST (1 << 7)
+
+LIMINE_DEPRECATED_IGNORE_START
+
+struct LIMINE_DEPRECATED limine_terminal;
+
+typedef void (*limine_terminal_write)(struct limine_terminal *, const char *, uint64_t);
+typedef void (*limine_terminal_callback)(struct limine_terminal *, uint64_t, uint64_t, uint64_t, uint64_t);
+
+struct LIMINE_DEPRECATED limine_terminal {
+    uint64_t columns;
+    uint64_t rows;
+    LIMINE_PTR(struct limine_framebuffer *) framebuffer;
+};
+
+struct LIMINE_DEPRECATED limine_terminal_response {
+    uint64_t revision;
+    uint64_t terminal_count;
+    LIMINE_PTR(struct limine_terminal **) terminals;
+    LIMINE_PTR(limine_terminal_write) write;
+};
+
+struct LIMINE_DEPRECATED limine_terminal_request {
+    uint64_t id[4];
+    uint64_t revision;
+    LIMINE_PTR(struct limine_terminal_response *) response;
+    LIMINE_PTR(limine_terminal_callback) callback;
+};
+
+LIMINE_DEPRECATED_IGNORE_END
+
+/* Paging mode */
+
+#define LIMINE_PAGING_MODE_REQUEST { LIMINE_COMMON_MAGIC, 0x95c1a0edab0944cb, 0xa4e5cb3842f7488a }
+
+#if defined (__x86_64__) || defined (__i386__)
+#define LIMINE_PAGING_MODE_X86_64_4LVL 0
+#define LIMINE_PAGING_MODE_X86_64_5LVL 1
+#define LIMINE_PAGING_MODE_MAX LIMINE_PAGING_MODE_X86_64_5LVL
+#define LIMINE_PAGING_MODE_DEFAULT LIMINE_PAGING_MODE_X86_64_4LVL
+#elif defined (__aarch64__)
+#define LIMINE_PAGING_MODE_AARCH64_4LVL 0
+#define LIMINE_PAGING_MODE_AARCH64_5LVL 1
+#define LIMINE_PAGING_MODE_MAX LIMINE_PAGING_MODE_AARCH64_5LVL
+#define LIMINE_PAGING_MODE_DEFAULT LIMINE_PAGING_MODE_AARCH64_4LVL
+#elif defined (__riscv) && (__riscv_xlen == 64)
+#define LIMINE_PAGING_MODE_RISCV_SV39 0
+#define LIMINE_PAGING_MODE_RISCV_SV48 1
+#define LIMINE_PAGING_MODE_RISCV_SV57 2
+#define LIMINE_PAGING_MODE_MAX LIMINE_PAGING_MODE_RISCV_SV57
+#define LIMINE_PAGING_MODE_DEFAULT LIMINE_PAGING_MODE_RISCV_SV48
+#else
+#error Unknown architecture
+#endif
+
+struct limine_paging_mode_response {
+    uint64_t revision;
+    uint64_t mode;
+    uint64_t flags;
+};
+
+struct limine_paging_mode_request {
+    uint64_t id[4];
+    uint64_t revision;
+    LIMINE_PTR(struct limine_paging_mode_response *) response;
+    uint64_t mode;
+    uint64_t flags;
+};
+
+/* 5-level paging */
+
+#define LIMINE_5_LEVEL_PAGING_REQUEST { LIMINE_COMMON_MAGIC, 0x94469551da9b3192, 0xebe5e86db7382888 }
+
+LIMINE_DEPRECATED_IGNORE_START
+
+struct LIMINE_DEPRECATED limine_5_level_paging_response {
+    uint64_t revision;
+};
+
+struct LIMINE_DEPRECATED limine_5_level_paging_request {
+    uint64_t id[4];
+    uint64_t revision;
+    LIMINE_PTR(struct limine_5_level_paging_response *) response;
+};
+
+LIMINE_DEPRECATED_IGNORE_END
+
+/* SMP */
+
+#define LIMINE_SMP_REQUEST { LIMINE_COMMON_MAGIC, 0x95a67b819a1b857e, 0xa0b61b723b6a73e0 }
+
+struct limine_smp_info;
+
+typedef void (*limine_goto_address)(struct limine_smp_info *);
+
+#if defined (__x86_64__) || defined (__i386__)
+
+#define LIMINE_SMP_X2APIC (1 << 0)
+
+struct limine_smp_info {
+    uint32_t processor_id;
+    uint32_t lapic_id;
+    uint64_t reserved;
+    LIMINE_PTR(limine_goto_address) goto_address;
+    uint64_t extra_argument;
+};
+
+struct limine_smp_response {
+    uint64_t revision;
+    uint32_t flags;
+    uint32_t bsp_lapic_id;
+    uint64_t cpu_count;
+    LIMINE_PTR(struct limine_smp_info **) cpus;
+};
+
+#elif defined (__aarch64__)
+
+struct limine_smp_info {
+    uint32_t processor_id;
+    uint32_t gic_iface_no;
+    uint64_t mpidr;
+    uint64_t reserved;
+    LIMINE_PTR(limine_goto_address) goto_address;
+    uint64_t extra_argument;
+};
+
+struct limine_smp_response {
+    uint64_t revision;
+    uint64_t flags;
+    uint64_t bsp_mpidr;
+    uint64_t cpu_count;
+    LIMINE_PTR(struct limine_smp_info **) cpus;
+};
+
+#elif defined (__riscv) && (__riscv_xlen == 64)
+
+struct limine_smp_info {
+    uint64_t processor_id;
+    uint64_t hartid;
+    uint64_t reserved;
+    LIMINE_PTR(limine_goto_address) goto_address;
+    uint64_t extra_argument;
+};
+
+struct limine_smp_response {
+    uint64_t revision;
+    uint64_t flags;
+    uint64_t bsp_hartid;
+    uint64_t cpu_count;
+    LIMINE_PTR(struct limine_smp_info **) cpus;
+};
+
+#else
+#error Unknown architecture
+#endif
+
+struct limine_smp_request {
+    uint64_t id[4];
+    uint64_t revision;
+    LIMINE_PTR(struct limine_smp_response *) response;
+    uint64_t flags;
+};
+
+/* Memory map */
+
+#define LIMINE_MEMMAP_REQUEST { LIMINE_COMMON_MAGIC, 0x67cf3d9d378a806f, 0xe304acdfc50c3c62 }
+
+#define LIMINE_MEMMAP_USABLE                 0
+#define LIMINE_MEMMAP_RESERVED               1
+#define LIMINE_MEMMAP_ACPI_RECLAIMABLE       2
+#define LIMINE_MEMMAP_ACPI_NVS               3
+#define LIMINE_MEMMAP_BAD_MEMORY             4
+#define LIMINE_MEMMAP_BOOTLOADER_RECLAIMABLE 5
+#define LIMINE_MEMMAP_KERNEL_AND_MODULES     6
+#define LIMINE_MEMMAP_FRAMEBUFFER            7
+
+struct limine_memmap_entry {
+    uint64_t base;
+    uint64_t length;
+    uint64_t type;
+};
+
+struct limine_memmap_response {
+    uint64_t revision;
+    uint64_t entry_count;
+    LIMINE_PTR(struct limine_memmap_entry **) entries;
+};
+
+struct limine_memmap_request {
+    uint64_t id[4];
+    uint64_t revision;
+    LIMINE_PTR(struct limine_memmap_response *) response;
+};
+
+/* Entry point */
+
+#define LIMINE_ENTRY_POINT_REQUEST { LIMINE_COMMON_MAGIC, 0x13d86c035a1cd3e1, 0x2b0caa89d8f3026a }
+
+typedef void (*limine_entry_point)(void);
+
+struct limine_entry_point_response {
+    uint64_t revision;
+};
+
+struct limine_entry_point_request {
+    uint64_t id[4];
+    uint64_t revision;
+    LIMINE_PTR(struct limine_entry_point_response *) response;
+    LIMINE_PTR(limine_entry_point) entry;
+};
+
+/* Kernel File */
+
+#define LIMINE_KERNEL_FILE_REQUEST { LIMINE_COMMON_MAGIC, 0xad97e90e83f1ed67, 0x31eb5d1c5ff23b69 }
+
+struct limine_kernel_file_response {
+    uint64_t revision;
+    LIMINE_PTR(struct limine_file *) kernel_file;
+};
+
+struct limine_kernel_file_request {
+    uint64_t id[4];
+    uint64_t revision;
+    LIMINE_PTR(struct limine_kernel_file_response *) response;
+};
+
+/* Module */
+
+#define LIMINE_MODULE_REQUEST { LIMINE_COMMON_MAGIC, 0x3e7e279702be32af, 0xca1c4f3bd1280cee }
+
+#define LIMINE_INTERNAL_MODULE_REQUIRED (1 << 0)
+#define LIMINE_INTERNAL_MODULE_COMPRESSED (1 << 1)
+
+struct limine_internal_module {
+    LIMINE_PTR(const char *) path;
+    LIMINE_PTR(const char *) cmdline;
+    uint64_t flags;
+};
+
+struct limine_module_response {
+    uint64_t revision;
+    uint64_t module_count;
+    LIMINE_PTR(struct limine_file **) modules;
+};
+
+struct limine_module_request {
+    uint64_t id[4];
+    uint64_t revision;
+    LIMINE_PTR(struct limine_module_response *) response;
+
+    /* Request revision 1 */
+    uint64_t internal_module_count;
+    LIMINE_PTR(struct limine_internal_module **) internal_modules;
+};
+
+/* RSDP */
+
+#define LIMINE_RSDP_REQUEST { LIMINE_COMMON_MAGIC, 0xc5e77b6b397e7b43, 0x27637845accdcf3c }
+
+struct limine_rsdp_response {
+    uint64_t revision;
+    LIMINE_PTR(void *) address;
+};
+
+struct limine_rsdp_request {
+    uint64_t id[4];
+    uint64_t revision;
+    LIMINE_PTR(struct limine_rsdp_response *) response;
+};
+
+/* SMBIOS */
+
+#define LIMINE_SMBIOS_REQUEST { LIMINE_COMMON_MAGIC, 0x9e9046f11e095391, 0xaa4a520fefbde5ee }
+
+struct limine_smbios_response {
+    uint64_t revision;
+    LIMINE_PTR(void *) entry_32;
+    LIMINE_PTR(void *) entry_64;
+};
+
+struct limine_smbios_request {
+    uint64_t id[4];
+    uint64_t revision;
+    LIMINE_PTR(struct limine_smbios_response *) response;
+};
+
+/* EFI system table */
+
+#define LIMINE_EFI_SYSTEM_TABLE_REQUEST { LIMINE_COMMON_MAGIC, 0x5ceba5163eaaf6d6, 0x0a6981610cf65fcc }
+
+struct limine_efi_system_table_response {
+    uint64_t revision;
+    LIMINE_PTR(void *) address;
+};
+
+struct limine_efi_system_table_request {
+    uint64_t id[4];
+    uint64_t revision;
+    LIMINE_PTR(struct limine_efi_system_table_response *) response;
+};
+
+/* EFI memory map */
+
+#define LIMINE_EFI_MEMMAP_REQUEST { LIMINE_COMMON_MAGIC, 0x7df62a431d6872d5, 0xa4fcdfb3e57306c8 }
+
+struct limine_efi_memmap_response {
+    uint64_t revision;
+    LIMINE_PTR(void *) memmap;
+    uint64_t memmap_size;
+    uint64_t desc_size;
+    uint64_t desc_version;
+};
+
+struct limine_efi_memmap_request {
+    uint64_t id[4];
+    uint64_t revision;
+    LIMINE_PTR(struct limine_efi_memmap_response *) response;
+};
+
+/* Boot time */
+
+#define LIMINE_BOOT_TIME_REQUEST { LIMINE_COMMON_MAGIC, 0x502746e184c088aa, 0xfbc5ec83e6327893 }
+
+struct limine_boot_time_response {
+    uint64_t revision;
+    int64_t boot_time;
+};
+
+struct limine_boot_time_request {
+    uint64_t id[4];
+    uint64_t revision;
+    LIMINE_PTR(struct limine_boot_time_response *) response;
+};
+
+/* Kernel address */
+
+#define LIMINE_KERNEL_ADDRESS_REQUEST { LIMINE_COMMON_MAGIC, 0x71ba76863cc55f63, 0xb2644a48c516a487 }
+
+struct limine_kernel_address_response {
+    uint64_t revision;
+    uint64_t physical_base;
+    uint64_t virtual_base;
+};
+
+struct limine_kernel_address_request {
+    uint64_t id[4];
+    uint64_t revision;
+    LIMINE_PTR(struct limine_kernel_address_response *) response;
+};
+
+/* Device Tree Blob */
+
+#define LIMINE_DTB_REQUEST { LIMINE_COMMON_MAGIC, 0xb40ddb48fb54bac7, 0x545081493f81ffb7 }
+
+struct limine_dtb_response {
+    uint64_t revision;
+    LIMINE_PTR(void *) dtb_ptr;
+};
+
+struct limine_dtb_request {
+    uint64_t id[4];
+    uint64_t revision;
+    LIMINE_PTR(struct limine_dtb_response *) response;
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif