Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 47 insertions, 0 deletions

diff --git a/Documentation/x86/zero-page.rst b/Documentation/x86/zero-page.rst
new file mode 100644
index 000000000..45aa9cceb
--- /dev/null
+++ b/Documentation/x86/zero-page.rst
@@ -0,0 +1,47 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+=========
+Zero Page
+=========
+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/uapi/asm/bootparam.h
+
+===========	=====	=======================	=================================================
+Offset/Size	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)
+070/008		ALL	acpi_rsdp_addr		Physical address of ACPI RSDP table
+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),
+						OBSOLETE!!
+0B0/010		ALL	olpc_ofw_header		OLPC's OpenFirmware CIF and friends
+0C0/004		ALL	ext_ramdisk_image	ramdisk_image high 32bits
+0C4/004		ALL	ext_ramdisk_size	ramdisk_size high 32bits
+0C8/004		ALL	ext_cmd_line_ptr	cmd_line_ptr high 32bits
+13C/004		ALL	cc_blob_address		Physical address of Confidential Computing blob
+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	alt_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_table (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)
+1EB/001		ALL     kbd_status      	Numlock is enabled
+1EC/001		ALL     secure_boot		Secure boot is enabled in the firmware
+1EF/001		ALL	sentinel		Used to detect broken bootloaders
+290/040		ALL	edd_mbr_sig_buffer	EDD MBR signatures
+2D0/A00		ALL	e820_table		E820 memory map table
+						(array of struct e820_entry)
+D00/1EC		ALL	eddbuf			EDD data (array of struct edd_info)
+===========	=====	=======================	=================================================