## SPDX-License-Identifier: GPL-2.0-only # ----------------------------------------------------------------- entries # ----------------------------------------------------------------- 0 120 r 0 reserved_memory # ----------------------------------------------------------------- # RTC_BOOT_BYTE (coreboot hardcoded) 384 1 e 3 boot_option 388 4 h 0 reboot_counter # ----------------------------------------------------------------- # coreboot config options: console 395 4 e 4 debug_level # ----------------------------------------------------------------- # coreboot config options: southbridge # Non Maskable Interrupt(NMI) support, which is an interrupt that may # occur on a RAM or unrecoverable error. 408 1 e 1 nmi 409 2 e 5 power_on_after_fail 411 2 e 6 sata_mode # ----------------------------------------------------------------- # coreboot config options: northbridge # gfx_uma_size # Quantity of shared video memory the IGP can use # 416 5 e 7 gfx_uma_size # ----------------------------------------------------------------- # coreboot config options: usb3 # usb3_mode # Controls how the motherboard's USB3 ports act at boot time 421 2 e 8 usb3_mode # usb3_drv # Load (or not) pre-OS xHCI USB3 bios driver # 423 1 e 1 usb3_drv # usb3_streams # Streams can provide more speed (as they can use 64Kb packets), # but they might cause incompatibilities with some devices. # 424 1 e 1 usb3_streams # ----------------------------------------------------------------- # Sandy/Ivy Bridge MRC Scrambler Seed values # note: MUST NOT be covered by checksum! 464 32 r 0 mrc_scrambler_seed 496 32 r 0 mrc_scrambler_seed_s3 528 16 r 0 mrc_scrambler_seed_chk # ----------------------------------------------------------------- # coreboot config options: check sums 544 16 h 0 check_sum # ----------------------------------------------------------------- enumerations #ID value text # Generic on/off enum 1 0 Disable 1 1 Enable # boot_option 3 0 Fallback 3 1 Normal # debug_level 4 0 Emergency 4 1 Alert 4 2 Critical 4 3 Error 4 4 Warning 4 5 Notice 4 6 Info 4 7 Debug 4 8 Spew # power_on_after_fail 5 0 Disable 5 1 Enable 5 2 Keep # sata_mode 6 0 AHCI 6 1 Compatible 6 2 Legacy # gfx_uma_size (Intel IGP Video RAM size) 7 0 32M 7 1 64M 7 2 96M 7 3 128M 7 4 160M 7 5 192M 7 6 224M 7 7 256M 7 8 288M 7 9 320M 7 10 352M 7 11 384M 7 12 416M 7 13 448M 7 14 480M 7 15 512M 7 16 1024M # usb3_mode # Disable = Use the port always as USB 2.0 for compatibility # Enable = Use the port always as USB 3.0 for speed # Auto = Initialize the port as USB 2.0, until the OS loads # xHCI USB 3.0 driver # SmartAuto = Same as Auto but, if the OS loads the xHCI USB 3.0 driver # and the computer is reset, keep the USB 3.0 mode. # 8 0 Disable 8 1 Enable 8 2 Auto 8 3 SmartAuto # ----------------------------------------------------------------- # # checksums checksum 392 431 544