diff options
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/cpu/x86/multiboot.h | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/src/include/cpu/x86/multiboot.h b/src/include/cpu/x86/multiboot.h new file mode 100644 index 0000000000..74fac15153 --- /dev/null +++ b/src/include/cpu/x86/multiboot.h @@ -0,0 +1,175 @@ +/* multiboot.h - multiboot header file. */ +/* + * Copyright (C) 2003 Free Software Foundation, Inc. + * Copyright (C) 2008 Robert Millan + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef MULTIBOOT_H +#define MULTIBOOT_H + +#include <stdint.h> + +/* How many bytes from the start of the file we search for the header. */ +#define MB_SEARCH 8192 + +/* The magic field should contain this. */ +#define MB_MAGIC 0x1BADB002 + +/* This should be in %eax. */ +#define MB_MAGIC2 0x2BADB002 + +/* The bits in the required part of flags field we don't support. */ +#define MB_UNSUPPORTED 0x0000fffc + +/* Alignment of multiboot modules. */ +#define MB_MOD_ALIGN 0x00001000 + +/* + * Flags set in the 'flags' member of the multiboot header. + */ + +/* Align all boot modules on i386 page (4KB) boundaries. */ +#define MB_PAGE_ALIGN 0x00000001 + +/* Must pass memory information to OS. */ +#define MB_MEMORY_INFO 0x00000002 + +/* Must pass video information to OS. */ +#define MB_VIDEO_MODE 0x00000004 + +/* This flag indicates the use of the address fields in the header. */ +#define MB_AOUT_KLUDGE 0x00010000 + +/* + * Flags to be set in the 'flags' member of the multiboot info structure. + */ + +/* is there basic lower/upper memory information? */ +#define MB_INFO_MEMORY 0x00000001 +/* is there a boot device set? */ +#define MB_INFO_BOOTDEV 0x00000002 +/* is the command-line defined? */ +#define MB_INFO_CMDLINE 0x00000004 +/* are there modules to do something with? */ +#define MB_INFO_MODS 0x00000008 + +/* These next two are mutually exclusive */ + +/* is there a symbol table loaded? */ +#define MB_INFO_AOUT_SYMS 0x00000010 +/* is there an ELF section header table? */ +#define MB_INFO_ELF_SHDR 0x00000020 + +/* is there a full memory map? */ +#define MB_INFO_MEM_MAP 0x00000040 + +/* Is there drive info? */ +#define MB_INFO_DRIVE_INFO 0x00000080 + +/* Is there a config table? */ +#define MB_INFO_CONFIG_TABLE 0x00000100 + +/* Is there a boot loader name? */ +#define MB_INFO_BOOT_LOADER_NAME 0x00000200 + +/* Is there a APM table? */ +#define MB_INFO_APM_TABLE 0x00000400 + +/* Is there video information? */ +#define MB_INFO_VIDEO_INFO 0x00000800 + +struct multiboot_header { + /* Must be MB_MAGIC - see above. */ + uint32_t magic; + + /* Feature flags. */ + uint32_t flags; + + /* The above fields plus this one must equal 0 mod 2^32. */ + uint32_t checksum; + + /* These are only valid if MB_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 MB_VIDEO_MODE is set. */ + uint32_t mode_type; + uint32_t width; + uint32_t height; + uint32_t depth; +}; + +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; + + uint32_t syms[4]; + + /* 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; +}; + +struct multiboot_mmap_entry { + uint32_t size; + uint64_t addr; + uint64_t len; + uint32_t type; +} __attribute__ ((packed)); + +extern struct multiboot_info *mbi; + +unsigned long write_multiboot_info(unsigned long, unsigned long, unsigned long, unsigned long); + +#endif |