path: root/Documentation/x86/zero-page.txt
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-The additional fields in struct boot_params as a part of 32-bit boot
-protocol of kernel. These should be filled by bootloader or 16-bit
-real-mode setup code of the kernel. References/settings to it mainly
-are in:
- arch/x86/include/asm/bootparam.h
-Offset Proto Name Meaning
-000/040 ALL screen_info Text mode or frame buffer information
- (struct screen_info)
-040/014 ALL apm_bios_info APM BIOS information (struct apm_bios_info)
-058/008 ALL tboot_addr Physical address of tboot shared page
-060/010 ALL ist_info Intel SpeedStep (IST) BIOS support information
- (struct ist_info)
-080/010 ALL hd0_info hd0 disk parameter, OBSOLETE!!
-090/010 ALL hd1_info hd1 disk parameter, OBSOLETE!!
-0A0/010 ALL sys_desc_table System description table (struct sys_desc_table)
-0B0/010 ALL olpc_ofw_header OLPC's OpenFirmware CIF and friends
-140/080 ALL edid_info Video mode setup (struct edid_info)
-1C0/020 ALL efi_info EFI 32 information (struct efi_info)
-1E0/004 ALL alk_mem_k Alternative mem check, in KB
-1E4/004 ALL scratch Scratch field for the kernel setup code
-1E8/001 ALL e820_entries Number of entries in e820_map (below)
-1E9/001 ALL eddbuf_entries Number of entries in eddbuf (below)
-1EA/001 ALL edd_mbr_sig_buf_entries Number of entries in edd_mbr_sig_buffer
- (below)
-290/040 ALL edd_mbr_sig_buffer EDD MBR signatures
-2D0/A00 ALL e820_map E820 memory map table
- (array of struct e820entry)
-D00/1EC ALL eddbuf EDD data (array of struct edd_info)