[coreboot-gerrit] Change in coreboot[master]: arch/x86: Use a common cbmem_top implementation

[Arthur Heymans (Code Review)]

Hello Patrick Rudolph, build bot (Jenkins),

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

https://review.coreboot.org/c/coreboot/+/36144

to look at the new patch set (#3).

Change subject: arch/x86: Use a common cbmem_top implementation
......................................................................

arch/x86: Use a common cbmem_top implementation

Currently all stages that need cbmem need an implementation of a
cbmem_top function.  On FSP and AGESA platforms this proves to be
painful and a pointer to the top of lower memory if often passed via
lower memory (e.g. EBDA) or via a PCI scratchpad register.

The problem with writing to lower memory is that also need to be
written on S3 as one cannot assume it to be still there. Writing
things on S3 is always a fragile thing to do.

A very generic solution is to pass cbmem_top via the program argument.
It should be possible to implement this solution on every
architecture.

Instead trying to figure out which files can be removed from stages
and which cbmem_top implementations need with preprocessor, rename all
cbmem_top implementation to cbmem_top_romstage.

Mechanisms set in place to pass on information from rom- to ram-stage
will be removed in a followup commit.

TESTED on qemu-x86.

Change-Id: I6d5a366d6f1bc76f26d459628237e6b2c8ae03ea
Signed-off-by: Arthur Heymans 
---
M src/arch/x86/Kconfig
M src/cpu/amd/family_10h-family_15h/ram_calc.c
M src/lib/Makefile.inc
M src/mainboard/emulation/qemu-i440fx/memmap.c
M src/northbridge/intel/e7505/memmap.c
M src/northbridge/intel/fsp_rangeley/memmap.c
M src/northbridge/intel/gm45/memmap.c
M src/northbridge/intel/haswell/memmap.c
M src/northbridge/intel/i440bx/memmap.c
M src/northbridge/intel/i945/memmap.c
M src/northbridge/intel/nehalem/memmap.c
M src/northbridge/intel/pineview/memmap.c
M src/northbridge/intel/sandybridge/memmap.c
M src/northbridge/intel/x4x/memmap.c
M src/northbridge/via/vx900/memmap.c
M src/soc/amd/picasso/memmap.c
M src/soc/amd/stoneyridge/memmap.c
M src/soc/intel/apollolake/memmap.c
M src/soc/intel/baytrail/memmap.c
M src/soc/intel/braswell/memmap.c
M src/soc/intel/broadwell/memmap.c
M src/soc/intel/cannonlake/memmap.c
M src/soc/intel/denverton_ns/memmap.c
M src/soc/intel/fsp_baytrail/memmap.c
M src/soc/intel/fsp_broadwell_de/memmap.c
M src/soc/intel/icelake/memmap.c
M src/soc/intel/quark/memmap.c
M src/soc/intel/skylake/memmap.c
28 files changed, 30 insertions(+), 26 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/44/36144/3