minix/kernel/arch/i386/multiboot.h
Erik van der Kouwe df0ba02a38 Multiboot support (contributed by Feiran "Fam" Zheng);
keep in mind that GRUB needs to be patched to read MFS for now;
use /boot/image_latest to boot the last compiled image in GRUB
2010-07-23 14:24:34 +00:00

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#ifndef __MULTIBOOT_H__
#define __MULTIBOOT_H__
#define MULTIBOOT_HEADER_MAGIC 0x1BADB002
#define MULTIBOOT_BOOTLOADER_MAGIC 0x2BADB002
/* Must pass memory information to OS. */
#define MULTIBOOT_MEMORY_INFO 0x00000002
#define MULTIBOOT_VIDEO_MODE 0x00000004
#define MULTIBOOT_AOUT_KLUDGE 0x00010000
#define MULTIBOOT_FLAGS (MULTIBOOT_MEMORY_INFO | \
MULTIBOOT_VIDEO_MODE | \
MULTIBOOT_AOUT_KLUDGE)
/* consts used for Multiboot pre-init */
#define MULTIBOOT_ENTRY_OFFSET 0x200
#define MULTIBOOT_LOAD_ADDRESS 0x200000-MULTIBOOT_ENTRY_OFFSET
#define MULTIBOOT_VIDEO_MODE_EGA 1
#define MULTIBOOT_VIDEO_BUFFER 0xB8000
/* Usable lower memory chunk has a upper bound */
#define MULTIBOOT_LOWER_MEM_MAX 0x7f800
#define MULTIBOOT_CONSOLE_LINES 25
#define MULTIBOOT_CONSOLE_COLS 80
#define MULTIBOOT_STACK_SIZE 4096
#define MULTIBOOT_PARAM_BUF_SIZE 1024
#define MULTIBOOT_KERNEL_a_text 0x48
#define MULTIBOOT_KERNEL_a_data (0x48+4)
#define MULTIBOOT_KERNEL_a_total (0x48+16)
/* Flags to be set in the flags member of the multiboot info structure. */
#define MULTIBOOT_INFO_MEMORY 0x00000001
/* Is there a boot device set? */
#define MULTIBOOT_INFO_BOOTDEV 0x00000002
/* Is the command-line defined? */
#define MULTIBOOT_INFO_CMDLINE 0x00000004
/* Are there modules to do something with? */
#define MULTIBOOT_INFO_MODS 0x00000008
/* get physical address by data pointer*/
#define PTR2PHY(ptr) (kernel_data_addr+(u32_t)(ptr))
/* get data pointer by physical address*/
#define PHY2PTR(phy) ((char *)((u32_t)(phy)-kernel_data_addr))
/* Get physical address by function pointer*/
#define FUNC2PHY(fun) (MULTIBOOT_LOAD_ADDRESS + MULTIBOOT_ENTRY_OFFSET + (u32_t)(fun))
#ifndef __ASSEMBLY__
#include <minix/types.h>
/* The symbol table for a.out. */
struct multiboot_aout_symbol_table
{
u32_t tabsize;
u32_t strsize;
u32_t addr;
u32_t reserved;
};
/* The section header table for ELF. */
struct multiboot_elf_section_header_table
{
u32_t num;
u32_t size;
u32_t addr;
u32_t shndx;
};
typedef struct multiboot_elf_section_header_table multiboot_elf_section_header_table_t;
typedef struct multiboot_aout_symbol_table multiboot_aout_symbol_table_t;
struct multiboot_info
{
/* Multiboot info version number */
u32_t flags;
/* Available memory from BIOS */
u32_t mem_lower;
u32_t mem_upper;
/* "root" partition */
u32_t boot_device;
/* Kernel command line */
u32_t cmdline;
/* Boot-Module list */
u32_t mods_count;
u32_t mods_addr;
union
{
multiboot_aout_symbol_table_t aout_sym;
multiboot_elf_section_header_table_t elf_sec;
} u;
/* Memory Mapping buffer */
u32_t mmap_length;
u32_t mmap_addr;
/* Drive Info buffer */
u32_t drives_length;
u32_t drives_addr;
/* ROM configuration table */
u32_t config_table;
/* Boot Loader Name */
u32_t boot_loader_name;
/* APM table */
u32_t apm_table;
/* Video */
u32_t vbe_control_info;
u32_t vbe_mode_info;
u16_t vbe_mode;
u16_t vbe_interface_seg;
u16_t vbe_interface_off;
u16_t vbe_interface_len;
};
typedef struct multiboot_info multiboot_info_t;
/* Buffer for multiboot parameters */
extern char multiboot_param_buf[];
/* Physical address of kernel data segment */
extern phys_bytes kernel_data_addr;
#endif /* __ASSEMBLY__ */
#endif /* __MULTIBOOT_H__ */