[coreboot-gerrit] Change in coreboot[master]: cpu/x86/mpinit/sipi_vector: Move code to C

[Patrick Rudolph (Code Review)]

Hello build bot (Jenkins), Patrick Georgi, Martin Roth, Tim Wawrzynczak, Christian Walter, Aaron Durbin,

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

https://review.coreboot.org/c/coreboot/+/46821

to look at the new patch set (#4).

Change subject: cpu/x86/mpinit/sipi_vector: Move code to C
......................................................................

cpu/x86/mpinit/sipi_vector: Move code to C

Use a C helper function to do early x86 CPU init. This allows easier
code changes that are hopefully less error prone than assembly code.
This changes assumes that stack works even without microcode updates
installed on the specific secondary CPU core.

The code is compiled without SSE and without optimizations.

Use existing code to update microcode.

TODO: Clean up code and reuse existing C code.

Tested on Supermicro X11SSH:
* The microcode is still updated on all core
* All cores call into MPinit code

Change-Id: Ib6c2ffa2ce8c42eee9f3fe8ec8cff933942207ca
Signed-off-by: Patrick Rudolph 
---
M src/cpu/x86/Makefile.inc
M src/cpu/x86/mp_init.c
M src/cpu/x86/sipi_vector.S
A src/cpu/x86/sipi_vector_c_handler.c
M src/include/cpu/x86/mp.h
5 files changed, 156 insertions(+), 127 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/21/46821/4