• Lenovo T500 laptop

• Specifications
• Hardware Maintenance Manual ¹⁾

• When booting Ubuntu 18.10, there's a gfx error initially; type help and press Enter to boot
• Be absolute certain to update the BIOS and ECP from the Lenovo Vendor BIOS with an attached rear-battery, as there is no way as of 2019/01/25 to update the ECP from Coreboot

• Generic 1066MHz RAM with UPC 609713501042 ²⁾

• G.SKILL F3-8500CL7D-8GBSQ ³⁾

• 18.04.1

sudo apt-get install -y bison build-essential curl flex git gnat libncurses5-dev m4 zlib1g-dev python-minimal

cd ~ && mkdir -p ~/'Projects' && rm -Rf ~/'Projects/coreboot/src' && git clone --branch 'master' --depth '1' --recurse-submodules 'https://review.coreboot.org/coreboot.git' ~/'Projects/coreboot/src' && sync

• This is necessary for ich9gen

cd ~ && mkdir -p ~/'Projects' && rm -Rf ~/'Projects/libreboot/src' && git clone --branch 'master' --depth '1' --recurse-submodules 'https://notabug.org/libreboot/libreboot.git' ~/'Projects/libreboot/src' && sync

• https://libreboot.org/docs/hardware/gm45_remove_me.html
• Generates a descriptor image free of IME ⁴⁾, and allows for use of the on-board ethernet controller

cd ~/'Projects/libreboot/src/resources/utilities/ich9deblob' && make clean && make jobs='16' && sync

• Change x to the on-board Ethernet MAC address formatted as XX:XX:XX:XX:XX:XX ⁵⁾

cd ~/'Projects/libreboot/src/resources/utilities/ich9deblob' && ~/'Projects/libreboot/src/resources/utilities/ich9deblob/ich9gen' --macaddress 'x'

• This copies the generated ich9fdgbe_4m.bin to the necessary folder for Coreboot
• The T500 uses the same board build as the T400 in Coreboot currently, hence the t400 mainboard name
• If the BIOS chip is a different size other than 4096KB, change this

mkdir -p ~/'Projects/coreboot/src/3rdparty/blobs/mainboard/lenovo/t400' && mv ~/'Projects/libreboot/src/resources/utilities/ich9deblob/ich9fdgbe_4m.bin' ~/'Projects/coreboot/src/3rdparty/blobs/mainboard/lenovo/t400/descriptor.bin' && ls ~/'Projects/coreboot/src/3rdparty/blobs/mainboard/lenovo/t400/descriptor.bin' && cd ~ && rm -Rf ~/'Projects/libreboot' && sync

cd ~/'Projects/coreboot/src' && make 'crossgcc-clean' && make 'crossgcc-i386' CPUS='16'

• Last updated: 2019/07/06

• Mainboard vendor: Lenovo
• Mainboard model: ThinkPad T500
• ROM chip size: 4096 KB (4MB)

• Local version string: Spinesnap
• [*] Use CMOS for configuration values
• [*] Load default configuration values into CMOS on each boot
• [ ] Compress ramstage with LZMA
• [ ] Include the coreboot .config file into the ROM image
• [ ] Create a table of timestamps collected during boot

• [ ] Enable VMX for virtualization
• [ ] Set IA32_FEATURE_CONTROL lock bit
• Include CPU microcode in CBFS: Do not include microcode updates
• [*] Add Intel descriptor.bin file ⁶⁾

• Display → Framebuffer mode: Linear “high-resolution” framebuffer
• [*] Enable PCIe Common Clock
• [*] Enable PCIe ASPM
• [*] Enable PCIe Clock Power Management
• [*] Enable PCIe ASPM L1 SubState

• [ ] Serial port on SuperIO
• [ ] Support Intel PCI-e WiFi adapters

• [*] Always clear all DRAM on regular boot

• [ ] Send console output to a CBMEM buffer
• Default console log level: 0: EMERG
• [*] Don't show any POST codes

• SeaBIOS version: master
• [*] Hardware init during option ROM execution
• SeaBIOS debug level (verbosity): 0

cd ~/'Projects/coreboot/src' && make 'distclean' && make 'nconfig' && sync

• Presents config options that are changed from defaults
• Reference
• Last updated: 2019/07/06

cd ~/'Projects/coreboot/src' && make 'savedefconfig' && nano ~/'Projects/coreboot/src/defconfig'

CONFIG_LOCALVERSION="Spinesnap"
CONFIG_USE_OPTION_TABLE=y
CONFIG_STATIC_OPTION_TABLE=y
# CONFIG_COMPRESS_RAMSTAGE is not set
# CONFIG_INCLUDE_CONFIG_FILE is not set
# CONFIG_COLLECT_TIMESTAMPS is not set
CONFIG_VENDOR_LENOVO=y
# CONFIG_DRIVERS_UART_8250IO is not set
CONFIG_HAVE_IFD_BIN=y
CONFIG_BOARD_LENOVO_T500=y
CONFIG_PCIEXP_L1_SUB_STATE=y
CONFIG_COREBOOT_ROMSIZE_KB_4096=y
CONFIG_PCIEXP_ASPM=y
CONFIG_PCIEXP_COMMON_CLOCK=y
CONFIG_PCIEXP_CLK_PM=y
# CONFIG_CONSOLE_CBMEM is not set
# CONFIG_ENABLE_VMX is not set
# CONFIG_SET_IA32_FC_LOCK_BIT is not set
CONFIG_CPU_MICROCODE_CBFS_NONE=y
CONFIG_GENERIC_LINEAR_FRAMEBUFFER=y
# CONFIG_DRIVERS_INTEL_WIFI is not set
CONFIG_SECURITY_CLEAR_DRAM_ON_REGULAR_BOOT=y
CONFIG_DEFAULT_CONSOLE_LOGLEVEL_0=y
CONFIG_NO_POST=y
CONFIG_SEABIOS_MASTER=y
CONFIG_SEABIOS_THREAD_OPTIONROMS=y
CONFIG_SEABIOS_DEBUG_LEVEL=0

• Last updated: 2019/02/12

nano ~/'Projects/coreboot/src/src/mainboard/lenovo/t400/cmos.default'

gfx_uma_size=352M

cd ~/'Projects/coreboot/src' && make clean && make && sync

mkdir -p ~/'coreboot-bin' && mv ~/'Projects/coreboot/src/build/coreboot.rom' ~/'coreboot-bin/T500-coreboot-'$(date +%Y-%m-%d)'.rom' && sync

• Change X to the VM instance's IP address

scp 192.168.122.X:~/coreboot-bin/*.rom ~/Downloads

• The initial flash must be done by an external programmer ⁷⁾

sync && sudo flashrom --programmer 'internal:laptop=force_I_want_a_brick' --chip 'MX25L3205D/MX25L3208D' --write ~/'Downloads/T500-coreboot-'*'.rom'