From 30d6e8f850d2fe26fffdeef0c38fc627ef8bab9a Mon Sep 17 00:00:00 2001
From: "Anna (navi) Figueiredo Gomes" <navi@vlhl.dev>
Date: Wed, 13 Dec 2023 13:24:48 +0100
Subject: initial commit

currently with:
booted via multiboot 1
protected mode to long mode boostrap code
vga used for outputting
gdt and idt set up
identity paging for the whole memory reported by multiboot
pic and ps/2 set up
acpi code exists but is broken
---
 include/multiboot.h | 173 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 173 insertions(+)
 create mode 100644 include/multiboot.h

(limited to 'include/multiboot.h')

diff --git a/include/multiboot.h b/include/multiboot.h
new file mode 100644
index 0000000..d2be87b
--- /dev/null
+++ b/include/multiboot.h
@@ -0,0 +1,173 @@
+#ifndef _MULTIBOOT_H_
+#define _MULTIBOOT_H_
+
+#include <stdint.h>
+
+struct multiboot_header
+{
+  uint32_t magic;
+
+  uint32_t flags;
+
+  /* The above fields plus this one must equal 0 mod 2^32. */
+  uint32_t checksum;
+
+  /* These are only valid if MULTIBOOT_AOUT_KLUDGE is set. */
+  uint32_t header_addr;
+  uint32_t load_addr;
+  uint32_t load_end_addr;
+  uint32_t bss_end_addr;
+  uint32_t entry_addr;
+
+  /* These are only valid if MULTIBOOT_VIDEO_MODE is set. */
+  uint32_t mode_type;
+  uint32_t width;
+  uint32_t height;
+  uint32_t depth;
+};
+
+/* The symbol table for a.out. */
+struct multiboot_aout_symbol_table
+{
+  uint32_t tabsize;
+  uint32_t strsize;
+  uint32_t addr;
+  uint32_t reserved;
+};
+
+/* The section header table for ELF. */
+struct multiboot_elf_section_header_table
+{
+  uint32_t num;
+  uint32_t size;
+  uint32_t addr;
+  uint32_t shndx;
+};
+
+struct multiboot_info
+{
+  /* Multiboot info version number */
+  uint32_t flags;
+
+  /* Available memory from BIOS */
+  uint32_t mem_lower;
+  uint32_t mem_upper;
+
+  /* "root" partition */
+  uint32_t boot_device;
+
+  /* Kernel command line */
+  uint32_t cmdline;
+
+  /* Boot-Module list */
+  uint32_t mods_count;
+  uint32_t mods_addr;
+
+  union
+  {
+    struct multiboot_aout_symbol_table aout_sym;
+    struct multiboot_elf_section_header_table elf_sec;
+  } u;
+
+  /* Memory Mapping buffer */
+  uint32_t mmap_length;
+  uint32_t mmap_addr;
+
+  /* Drive Info buffer */
+  uint32_t drives_length;
+  uint32_t drives_addr;
+
+  /* ROM configuration table */
+  uint32_t config_table;
+
+  /* Boot Loader Name */
+  uint32_t boot_loader_name;
+
+  /* APM table */
+  uint32_t apm_table;
+
+  /* Video */
+  uint32_t vbe_control_info;
+  uint32_t vbe_mode_info;
+  uint16_t vbe_mode;
+  uint16_t vbe_interface_seg;
+  uint16_t vbe_interface_off;
+  uint16_t vbe_interface_len;
+
+  uint64_t framebuffer_addr;
+  uint32_t framebuffer_pitch;
+  uint32_t framebuffer_width;
+  uint32_t framebuffer_height;
+  uint8_t framebuffer_bpp;
+#define MULTIBOOT_FRAMEBUFFER_TYPE_INDEXED 0
+#define MULTIBOOT_FRAMEBUFFER_TYPE_RGB     1
+#define MULTIBOOT_FRAMEBUFFER_TYPE_EGA_TEXT     2
+  uint8_t framebuffer_type;
+  union
+  {
+    struct
+    {
+      uint32_t framebuffer_palette_addr;
+      uint16_t framebuffer_palette_num_colors;
+    };
+    struct
+    {
+      uint8_t framebuffer_red_field_position;
+      uint8_t framebuffer_red_mask_size;
+      uint8_t framebuffer_green_field_position;
+      uint8_t framebuffer_green_mask_size;
+      uint8_t framebuffer_blue_field_position;
+      uint8_t framebuffer_blue_mask_size;
+    };
+  };
+};
+
+struct multiboot_color
+{
+  uint8_t red;
+  uint8_t green;
+  uint8_t blue;
+};
+
+struct multiboot_mmap_entry
+{
+  uint32_t size;
+  uint64_t addr;
+  uint64_t len;
+#define MULTIBOOT_MEMORY_AVAILABLE              1
+#define MULTIBOOT_MEMORY_RESERVED               2
+#define MULTIBOOT_MEMORY_ACPI_RECLAIMABLE       3
+#define MULTIBOOT_MEMORY_NVS                    4
+#define MULTIBOOT_MEMORY_BADRAM                 5
+  uint32_t type;
+} __attribute__((packed));
+
+struct multiboot_mod_list
+{
+  /* the memory used goes from bytes ’mod_start’ to ’mod_end-1’ inclusive */
+  uint32_t mod_start;
+  uint32_t mod_end;
+
+  /* Module command line */
+  uint32_t cmdline;
+
+  /* padding to take it to 16 bytes (must be zero) */
+  uint32_t pad;
+};
+
+/* APM BIOS info. */
+struct multiboot_apm_info
+{
+  uint16_t version;
+  uint16_t cseg;
+  uint32_t offset;
+  uint16_t cseg_16;
+  uint16_t dseg;
+  uint16_t flags;
+  uint16_t cseg_len;
+  uint16_t cseg_16_len;
+  uint16_t dseg_len;
+};
+
+#endif
+
-- 
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