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xx20/xx30 maximized coreboot configs: Fix CONFIG_CBFS_SIZE to reflect ifd.bin's BIOS region (xx20: gain of 0.59mb, xx30: gain of 0.4mb #1298

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merged 1 commit into from
Feb 9, 2023

Commits on Feb 9, 2023

  1. xx20/xx30 maximized coreboot configs: Fix CONFIG_CBFS_SIZE to reflect…

    … ifd.bin's BIOS regions.
    
    The calculations outlined at linuxboot#1282 (comment)
    Sums to having 'ifdtool -f layout.txt ifd_shrinked.bin && cat layout.txt'
    The example for T440p:
    00000000:00000fff fd
    00021000:00bfffff bios
    00003000:00020fff me
    00001000:00002fff gbe
    
    Here: 00bfffff-00021000=BDEFFF
    Which is exact result of @rbeslow's calculations.
    
    There is an issue on haswell, maybe because of car, maybe because of non native memory init blob.
    But this is not the case for xx20/xx30 boards.
    tlaurion committed Feb 9, 2023
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