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#[1]Index [2]Search [3]11. The TLB [4]9. ORC unwinder
[5]The Linux Kernel
6.3.0-rc6
Quick search
____________________ Go
Contents
[X]
* [6]A guide to the Kernel Development Process
* [7]Submitting patches: the essential guide to getting your code
into the kernel
* [8]Code of conduct
* [9]Kernel Maintainer Handbook
* [10]All development-process docs
* [11]Core API Documentation
* [12]Driver implementer's API guide
* [13]Kernel subsystem documentation
* [14]Locking in the kernel
* [15]Linux kernel licensing rules
* [16]How to write kernel documentation
* [17]Development tools for the kernel
* [18]Kernel Testing Guide
* [19]Kernel Hacking Guides
* [20]Linux Tracing Technologies
* [21]fault-injection
* [22]Kernel Livepatching
* [23]Rust
* [24]The Linux kernel user's and administrator's guide
* [25]The kernel build system
* [26]Reporting issues
* [27]User-space tools
* [28]The Linux kernel user-space API guide
* [29]The Linux kernel firmware guide
* [30]Open Firmware and Devicetree
* [31]CPU Architectures
+ [32]ARC architecture
+ [33]ARM Architecture
+ [34]ARM64 Architecture
+ [35]IA-64 Architecture
+ [36]LoongArch Architecture
+ [37]m68k Architecture
+ [38]MIPS-specific Documentation
+ [39]Nios II Specific Documentation
+ [40]OpenRISC Architecture
+ [41]PA-RISC Architecture
+ [42]powerpc
+ [43]RISC-V architecture
+ [44]s390 Architecture
+ [45]SuperH Interfaces Guide
+ [46]Sparc Architecture
+ [47]x86-specific Documentation
o [48]1. The Linux/x86 Boot Protocol
o [49]2. DeviceTree Booting
o [50]3. x86 Feature Flags
o [51]4. x86 Topology
o [52]5. Kernel level exception handling
o [53]6. Kernel Stacks
o [54]7. Kernel Entries
o [55]8. Early Printk
o [56]9. ORC unwinder
o [57]10. Zero Page
o [58]11. The TLB
o [59]12. MTRR (Memory Type Range Register) control
o [60]13. PAT (Page Attribute Table)
o [61]14. Hardware-Feedback Interface for scheduling on
Intel Hardware
o [62]15. x86 IOMMU Support
o [63]16. Intel(R) TXT Overview
o [64]17. AMD Memory Encryption
o [65]18. AMD HSMP interface
o [66]19. Intel Trust Domain Extensions (TDX)
o [67]20. Page Table Isolation (PTI)
o [68]21. Microarchitectural Data Sampling (MDS) mitigation
o [69]22. The Linux Microcode Loader
o [70]23. User Interface for Resource Control feature
o [71]24. TSX Async Abort (TAA) mitigation
o [72]25. Bus lock detection and handling
o [73]26. USB Legacy support
o [74]27. i386 Support
o [75]28. x86_64 Support
o [76]29. In-Field Scan
o [77]30. Shared Virtual Addressing (SVA) with ENQCMD
o [78]31. Software Guard eXtensions (SGX)
o [79]32. Feature status on x86 architecture
o [80]33. x86-specific ELF Auxiliary Vectors
o [81]34. Using XSTATE features in user space applications
+ [82]Xtensa Architecture
* [83]Unsorted Documentation
* [84]Translations
This Page
* [85]Show Source
10. Zero Page[86]¶
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)
©The kernel development community. | Powered by [87]Sphinx 5.0.1 &
[88]Alabaster 0.7.12 | [89]Page source
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