62e2e7dba0
Share the header with arch/x86 code Clean up the use of the boot flags Add code to print the framebuffer information, if present
177 lines
4.4 KiB
C
177 lines
4.4 KiB
C
/*
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* Copyright (c) 2009 Corey Tabaka
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*
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* Use of this source code is governed by a MIT-style
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* license that can be found in the LICENSE file or at
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* https://opensource.org/licenses/MIT
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*/
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#pragma once
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/* from https://www.gnu.org/software/grub/manual/multiboot/multiboot.html */
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/* magic number for multiboot header */
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#define MULTIBOOT_HEADER_MAGIC 0x1BADB002
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/* magic number passed by multiboot-compliant boot loaders */
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#define MULTIBOOT_BOOTLOADER_MAGIC 0x2BADB002
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/* Alignment of multiboot modules. */
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#define MULTIBOOT_MOD_ALIGN 0x00001000
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/* Alignment of the multiboot info structure. */
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#define MULTIBOOT_INFO_ALIGN 0x00000004
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/* Flags set in the ’flags’ member of the multiboot header. */
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/* Align all boot modules on i386 page (4KB) boundaries. */
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#define MULTIBOOT_PAGE_ALIGN 0x00000001
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/* Must pass memory information to OS. */
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#define MULTIBOOT_MEMORY_INFO 0x00000002
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/* Must pass video information to OS. */
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#define MULTIBOOT_VIDEO_MODE 0x00000004
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/* This flag indicates the use of the address fields in the header. */
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#define MULTIBOOT_AOUT_KLUDGE 0x00010000
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#ifndef ASSEMBLY
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#include <sys/types.h>
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#include <assert.h>
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/* multiboot header */
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typedef struct multiboot_header {
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uint32_t magic;
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uint32_t flags;
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uint32_t checksum;
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uint32_t header_addr;
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uint32_t load_addr;
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uint32_t load_end_addr;
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uint32_t bss_end_addr;
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uint32_t entry_addr;
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} multiboot_header_t;
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/* symbol table for a.out */
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typedef struct aout_symbol_table {
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uint32_t tabsize;
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uint32_t strsize;
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uint32_t addr;
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uint32_t reserved;
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} aout_symbol_table_t;
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/* section header table for ELF */
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typedef struct elf_section_header_table {
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uint32_t num;
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uint32_t size;
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uint32_t addr;
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uint32_t shndx;
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} elf_section_header_table_t;
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/* multiboot info */
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typedef struct multiboot_info {
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uint32_t flags;
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uint32_t mem_lower;
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uint32_t mem_upper;
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uint32_t boot_device;
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uint32_t cmdline;
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uint32_t mods_count;
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uint32_t mods_addr;
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union {
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aout_symbol_table_t aout_sym;
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elf_section_header_table_t elf_sec;
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} u;
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uint32_t mmap_length;
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uint32_t mmap_addr;
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uint32_t drives_length;
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uint32_t drives_addr;
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uint32_t config_table;
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uint32_t boot_loader_name;
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uint32_t apm_table;
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uint32_t vbe_control_info;
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uint32_t vbe_mode_info;
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uint16_t vbe_mode;
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uint16_t vbe_interface_seg;
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uint16_t vbe_interface_off;
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uint16_t vbe_interface_len;
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uint64_t framebuffer_addr;
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uint32_t framebuffer_pitch;
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uint32_t framebuffer_width;
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uint32_t framebuffer_height;
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uint8_t framebuffer_bpp;
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uint8_t framebuffer_type;
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union {
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struct {
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uint32_t framebuffer_palette_addr;
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uint16_t framebuffer_palette_num_colors;
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};
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struct {
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uint8_t framebuffer_red_field_position;
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uint8_t framebuffer_red_mask_size;
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uint8_t framebuffer_green_field_position;
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uint8_t framebuffer_green_mask_size;
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uint8_t framebuffer_blue_field_position;
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uint8_t framebuffer_blue_mask_size;
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};
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};
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} multiboot_info_t;
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enum {
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MB_INFO_MEM_SIZE = 0x001,
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MB_INFO_BOOT_DEV = 0x002,
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MB_INFO_CMD_LINE = 0x004,
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MB_INFO_MODS = 0x008,
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MB_INFO_SYMS = 0x010,
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MB_INFO_MMAP = 0x040,
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MB_INFO_DRIVES = 0x080,
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MB_INFO_CONFIG = 0x100,
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MB_INFO_BOOT_LOADER = 0x200,
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MB_INFO_APM_TABLE = 0x400,
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MB_INFO_VBE = 0x800,
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MB_INFO_FRAMEBUFFER = 0x1000,
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};
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/* module structure */
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typedef struct module {
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uint32_t mod_start;
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uint32_t mod_end;
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uint32_t string;
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uint32_t reserved;
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} module_t;
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/* memory map - be careful that the offset 0 is base_addr_low without size */
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typedef struct memory_map {
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uint32_t size;
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uint32_t base_addr_low;
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uint32_t base_addr_high;
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uint32_t length_low;
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uint32_t length_high;
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uint32_t type;
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} memory_map_t;
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/* memory map entry types */
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enum {
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MB_MMAP_TYPE_AVAILABLE = 0x01,
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MB_MMAP_TYPE_RESERVED = 0x02,
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MB_MMAP_TYPE_ACPI_RECLAIM = 0x03,
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MB_MMAP_TYPE_ACPI_NVS = 0x04,
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MB_MMAP_TYPE_BADRAM = 0x05,
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};
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/* framebuffer types */
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enum {
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MULTIBOOT_FRAMEBUFFER_TYPE_INDEXED = 0,
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MULTIBOOT_FRAMEBUFFER_TYPE_RGB = 1,
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MULTIBOOT_FRAMEBUFFER_TYPE_EGA_TEXT = 2,
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};
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#endif // ASSEMBLY
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