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| author | H. Peter Anvin <hpa@zytor.com> | 2008-07-22 15:32:38 -0400 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2008-07-22 15:34:38 -0400 |
| commit | 5616c23ad9cd3c50af674d408fef7b90abeee81c (patch) | |
| tree | 07409cc0667210336ea071c24a765b0cc1738d84 /Documentation/x86/zero-page.txt | |
| parent | 93ded9b8fd42abe2c3607097963d8de6ad9117eb (diff) | |
x86: doc: move x86-generic documentation from Doc/x86/i386
The boot protocol, USB legacy support, and zero-page documentation is
common to the x86 platform, not i386-specific.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'Documentation/x86/zero-page.txt')
| -rw-r--r-- | Documentation/x86/zero-page.txt | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/Documentation/x86/zero-page.txt b/Documentation/x86/zero-page.txt new file mode 100644 index 00000000000..169ad423a3d --- /dev/null +++ b/Documentation/x86/zero-page.txt @@ -0,0 +1,31 @@ +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: + + include/asm-x86/bootparam.h + + +Offset Proto Name Meaning +/Size + +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) +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) +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) |