[coreboot-gerrit] Change in coreboot[master]: console/flashsconsole: Add spi flash console for debugging

[Youness Alaoui (Code Review)]

Hello Aaron Durbin, Philippe Mathieu-Daudé, build bot (Jenkins),

I'd like you to reexamine a change.  Please visit

    https://review.coreboot.org/19849

to look at the new patch set (#10).

Change subject: console/flashsconsole: Add spi flash console for debugging
......................................................................

console/flashsconsole: Add spi flash console for debugging

If CONSOLE_SPI_FLASH config is enabled, we write the cbmem
messages to the 'CONSOLE' area in FMAP which allows us to grab the
log when we read the flash.

This is useful when you don't have usb debugging, and
UART lines are hard to find. Since a failure to boot would
require a hardware flasher anyways, we can get the log
at the same time.

This feature should only be used when no alternative is
found and only when we can't boot the system, because
excessive writes to the flash is not recommended.

This has been tested on purism/librem13 v2 and librem 15 v3 which
run Intel Skylake hardware. It has not been tested on other archs
or with a driver other than the fast_spi.

Change-Id: I74a297b94f6881d8c27cbe5168f161d8331c3df3
Signed-off-by: Youness Alaoui <youness.alaoui at puri.sm>
---
M Makefile.inc
M src/console/Kconfig
M src/console/console.c
M src/drivers/spi/Makefile.inc
A src/drivers/spi/flashconsole.c
A src/include/console/flash.h
M util/cbfstool/default-x86.fmd
M util/cbfstool/default.fmd
8 files changed, 257 insertions(+), 3 deletions(-)


  git pull ssh://review.coreboot.org:29418/coreboot refs/changes/49/19849/10
-- 
To view, visit https://review.coreboot.org/19849
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Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I74a297b94f6881d8c27cbe5168f161d8331c3df3
Gerrit-PatchSet: 10
Gerrit-Project: coreboot
Gerrit-Branch: master
Gerrit-Owner: Youness Alaoui <snifikino at gmail.com>
Gerrit-Reviewer: Aaron Durbin <adurbin at chromium.org>
Gerrit-Reviewer: Julius Werner <jwerner at chromium.org>
Gerrit-Reviewer: Paul Menzel <paulepanter at users.sourceforge.net>
Gerrit-Reviewer: Philippe Mathieu-Daudé <philippe.mathieu.daude at gmail.com>
Gerrit-Reviewer: Youness Alaoui <snifikino at gmail.com>
Gerrit-Reviewer: build bot (Jenkins) <no-reply at coreboot.org>