blob: 82fbdbc1e0b0626611462132d38fc29c5ee27078 [file] [log] [blame]
Huang, Yingaa694322007-10-24 10:18:49 +08001The additional fields in struct boot_params as a part of 32-bit boot
2protocol of kernel. These should be filled by bootloader or 16-bit
3real-mode setup code of the kernel. References/settings to it mainly
4are in:
Andi Kleen43fb2382007-08-10 22:31:08 +02005
Alexander Kuleshovf5ecb002015-01-31 13:23:24 +06006 arch/x86/include/uapi/asm/bootparam.h
Linus Torvalds1da177e2005-04-16 15:20:36 -07007
Linus Torvalds1da177e2005-04-16 15:20:36 -07008
Huang, Yingaa694322007-10-24 10:18:49 +08009Offset Proto Name Meaning
10/Size
Linus Torvalds1da177e2005-04-16 15:20:36 -070011
Huang, Yingaa694322007-10-24 10:18:49 +080012000/040 ALL screen_info Text mode or frame buffer information
13 (struct screen_info)
14040/014 ALL apm_bios_info APM BIOS information (struct apm_bios_info)
Joseph Cihula31625342009-06-30 19:30:59 -070015058/008 ALL tboot_addr Physical address of tboot shared page
Huang, Yingaa694322007-10-24 10:18:49 +080016060/010 ALL ist_info Intel SpeedStep (IST) BIOS support information
17 (struct ist_info)
18080/010 ALL hd0_info hd0 disk parameter, OBSOLETE!!
19090/010 ALL hd1_info hd1 disk parameter, OBSOLETE!!
200A0/010 ALL sys_desc_table System description table (struct sys_desc_table)
Andres Salomonfd699c72010-06-18 17:46:53 -0400210B0/010 ALL olpc_ofw_header OLPC's OpenFirmware CIF and friends
H. Peter Anvin09c205a2013-01-27 10:43:28 -0800220C0/004 ALL ext_ramdisk_image ramdisk_image high 32bits
230C4/004 ALL ext_ramdisk_size ramdisk_size high 32bits
240C8/004 ALL ext_cmd_line_ptr cmd_line_ptr high 32bits
Huang, Yingaa694322007-10-24 10:18:49 +080025140/080 ALL edid_info Video mode setup (struct edid_info)
261C0/020 ALL efi_info EFI 32 information (struct efi_info)
271E0/004 ALL alk_mem_k Alternative mem check, in KB
281E4/004 ALL scratch Scratch field for the kernel setup code
291E8/001 ALL e820_entries Number of entries in e820_map (below)
301E9/001 ALL eddbuf_entries Number of entries in eddbuf (below)
311EA/001 ALL edd_mbr_sig_buf_entries Number of entries in edd_mbr_sig_buffer
32 (below)
H. Peter Anvin09c205a2013-01-27 10:43:28 -0800331EF/001 ALL sentinel Used to detect broken bootloaders
Huang, Yingaa694322007-10-24 10:18:49 +080034290/040 ALL edd_mbr_sig_buffer EDD MBR signatures
352D0/A00 ALL e820_map E820 memory map table
36 (array of struct e820entry)
37D00/1EC ALL eddbuf EDD data (array of struct edd_info)