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util/apcb: Add apcb_edit tool

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On the Picasso architecture, the PSP is responsible for setting up DRAM
before releasing the x86. The APCB (AGESA PSP Configuration Block)
contains multiple SPDs and the GPIO numbers used to select the correct
SPD. Since the source to build the APCBs is not public, it can't be
built as part of the coreboot build. To work around this problem, we use
a template APCB and inject the relevant information.

BUG=b:147042464

Signed-off-by: Rob Barnes <robbarnes@google.com>
Change-Id: I88a09743f8e8a184c47071ee5e417f5b6bdb7467
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/coreboot/+/2123799
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41380
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-by: Furquan Shaikh <furquan@google.com>
This commit is contained in:
Rob Barnes
2020-03-27 01:13:21 -06:00
committed by Patrick Georgi
parent 5dd76fd4cc
commit f836a234e2
2 changed files with 188 additions and 0 deletions
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util/apcb/README Normal file
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The necessary tools for building APCBs are not available for use by coreboot.
This tool allows patching an existing APCB binary with specific SPDs
and GPIO selection pins.