68 lines
2.9 KiB
Markdown
68 lines
2.9 KiB
Markdown
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# Intel IFD Binary Extraction Tutorial
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## Part 1: Extracting Binaries
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To begin extracting the binaries, first create a directory labeled "binaries"
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in the coreboot directory (i.e. /path/to/coreboot/binaries/).
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Now, execute the following commands to extract the binaries from a ROM image.
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**Note:** Make sure you are in the root coreboot directory.
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cd /path/to/coreboot/util/ifdtool
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./ifdtool COREBOOT_IMAGE
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./ifdtool -d COREBOOT_IMAGE
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./ifdtool -x COREBOOT_IMAGE
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In the above steps, COREBOOT_IMAGE is the name of the ROM image to extract the
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binaries from, including the file path (ex. /build/coreboot.rom).
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Copy the extracted .bin files to the binaries directory you created previously.
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**Note:** You may want to rename your various .bin files to more clearly
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indicate what they are and their purpose.
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To extract the mrc.bin, move to the /coreboot/build directory and run the
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following command:
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cd /path/to/coreboot/build/
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./cbfstool COREBOOT_IMAGE extract -n mrc.bin -f /path/to/destination/filename
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where COREBOOT_IMAGE is the filepath to the ROM image (same image as above),
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/path/to/destination is the filepath to the destination directory and filename
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is the output filename. An example command is given below:
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./cbfstool coreboot.rom extract -n mrc.bin -f /path/to/coreboot/binaries/mrc.bin
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## Part 2: Using extract_blobs.sh
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To simplify some of the steps above, there is a script in the
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/path/to/coreboot/util/chromeos/ directory called extract_blobs.sh what will
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extract the flashdescriptor.bin and intel_me.bin files.
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To run this script, switch to the /path/to/coreboot/util/chromeos/ directory
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and execute the script providing a coreboot image as an argument.
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cd /path/to/coreboot/util/chromeos/
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./extract_blobs.sh COREBOOT_IMAGE
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Executing those commands will result in two binary blobs to appear in the
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/path/to/coreboot/util/chromeos/ directory under the names
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'flashdescriptor.bin' and 'me.bin'.
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## Part 3: Changing the coreboot configuration settings
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To begin using the binaries extracted above, enable the use of binary
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repositories in the menuconfig. From the main coreboot directory, run
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'make menuconfig'. Select "General Setup", then select "Allow use of
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binary-only repository", then exit to the main menu.
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To configure the ROM image for a specific board, select "Mainboard". Select
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"Mainboard vendor" and scroll to the correct vendor. Then select "Mainboard
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model" and select the name of the board model. Exit back to the main menu.
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To add the binaries you extracted, select "Chipset". Scroll and select "Add a
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System Agent Binary" and set the filepath to your mrc.bin file's filepath.
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Scroll and select "Add Intel descriptor.bin file" and type the filepath for
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your descriptor.bin file. Scroll down and select "Add Intel ME/TXE firmware
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file" and type the filepath for your ME file. Exit to the main menu.
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Select "Exit", and select "Yes" when prompted to save your configuration.
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