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authorJonathan Neuschäfer <j.neuschaefer@gmx.net>2018-04-08 15:54:47 +0200
committerPatrick Georgi <pgeorgi@google.com>2018-04-10 10:48:57 +0000
commit9f9f7a23d9f52a4278150390bd44c7d9496c160f (patch)
treeef201af4bf1c2bef5b4d7ee3c2620ab95d50e093 /Documentation/abi-data-consumption.txt
parentf059f96c3860885c30b1d6731b77fb538d859199 (diff)
downloadcoreboot-9f9f7a23d9f52a4278150390bd44c7d9496c160f.tar.xz
Documentation: Convert abi-data-consumption.txt to Markdown
This will help static site generators that can turn Markdown into HTML but can't easily turn plain text into HTML. Change-Id: Id186db140503f3c2759d579b18476fff021988c8 Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/25559 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Patrick Georgi <pgeorgi@google.com> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
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-This text describes the ABI coreboot presents to downstream users. Such
-users are payloads and/or operating systems. Therefore, this text serves
-at what can be relied on for downstream consumption. Anything not explicitly
-listed as consumable is subject to change without notice.
-
-Background and Usage
-
-coreboot passes information to downstream users using coreboot tables. These
-table definitions can be found in src/include/boot/coreboot_tables.h and
-payloads/libpayload/include/coreboot_tables.h respectively within coreboot
-and libpayload. One of the most vital and important pieces of information
-found within these tables is the memory map of the system indicating
-available and reserved memory.
-
-In 2009 cbmem was added to coreboot. The "CBMEM high table memory manager"
-serves a way for coreboot to bookkeep its own internal data. While some
-of this data may be exposed through the coreboot tables the data structures
-used to manage the data within the cbmem area is subject to change.
-
-Provided the above, if one needs a piece of data exposed to the OS
-or payload it should reside within the coreboot tables. If it isn't there
-then a code change will be required to add it to the coreboot tables.