Merge tag 'trace-v4.7-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt...
[linux-2.6-block.git] / Documentation / x86 / zero-page.txt
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1The 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:
43fb2387 5
f5ecb005 6 arch/x86/include/uapi/asm/bootparam.h
1da177e4 7
1da177e4 8
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9Offset Proto Name Meaning
10/Size
1da177e4 11
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12000/040 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)
31625340 15058/008 ALL tboot_addr Physical address of tboot shared page
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16060/010 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!!
94916301
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200A0/010 ALL sys_desc_table System description table (struct sys_desc_table),
21 OBSOLETE!!
fd699c76 220B0/010 ALL olpc_ofw_header OLPC's OpenFirmware CIF and friends
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230C0/004 ALL ext_ramdisk_image ramdisk_image high 32bits
240C4/004 ALL ext_ramdisk_size ramdisk_size high 32bits
250C8/004 ALL ext_cmd_line_ptr cmd_line_ptr high 32bits
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26140/080 ALL edid_info Video mode setup (struct edid_info)
271C0/020 ALL efi_info EFI 32 information (struct efi_info)
281E0/004 ALL alk_mem_k Alternative mem check, in KB
291E4/004 ALL scratch Scratch field for the kernel setup code
301E8/001 ALL e820_entries Number of entries in e820_map (below)
311E9/001 ALL eddbuf_entries Number of entries in eddbuf (below)
321EA/001 ALL edd_mbr_sig_buf_entries Number of entries in edd_mbr_sig_buffer
33 (below)
09c205af 341EF/001 ALL sentinel Used to detect broken bootloaders
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35290/040 ALL edd_mbr_sig_buffer EDD MBR signatures
362D0/A00 ALL e820_map E820 memory map table
37 (array of struct e820entry)
38D00/1EC ALL eddbuf EDD data (array of struct edd_info)