Change in coreboot[master]: soc/amd/cezanne: add basic MCA support

[Felix Held (Code Review)]

Attention is currently required from: Jason Glenesk, Raul Rangel, Marshall Dawson.
Felix Held has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/56262 )

Change subject: soc/amd/cezanne: add basic MCA support
......................................................................

soc/amd/cezanne: add basic MCA support

Currently the MCA support for Cezanne only clears the MCA status
registers. The MCA error handling and BERT table generation will be
added in subsequent patches.

Change-Id: Ib9b5174186c28c8c82f57ffd8936c8dad4e63c5b
Signed-off-by: Felix Held 
---
M src/soc/amd/cezanne/Makefile.inc
M src/soc/amd/cezanne/cpu.c
M src/soc/amd/cezanne/include/soc/cpu.h
A src/soc/amd/cezanne/mca.c
4 files changed, 18 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/62/56262/1

diff --git a/src/soc/amd/cezanne/Makefile.inc b/src/soc/amd/cezanne/Makefile.inc
index fa38cc3..d68a6b6 100644
--- a/src/soc/amd/cezanne/Makefile.inc
+++ b/src/soc/amd/cezanne/Makefile.inc
@@ -39,6 +39,7 @@
 ramstage-y	+= fch.c
 ramstage-y	+= fsp_s_params.c
 ramstage-y	+= gpio.c
+ramstage-y	+= mca.c
 ramstage-y	+= reset.c
 ramstage-y	+= root_complex.c
 ramstage-y	+= uart.c
diff --git a/src/soc/amd/cezanne/cpu.c b/src/soc/amd/cezanne/cpu.c
index ddc49a9..5f0a5a1 100644
--- a/src/soc/amd/cezanne/cpu.c
+++ b/src/soc/amd/cezanne/cpu.c
@@ -59,6 +59,7 @@

static void zen_2_3_init(struct device *dev)
 {
+	check_mca();
    setup_lapic();
    set_cstate_io_addr();

diff --git a/src/soc/amd/cezanne/include/soc/cpu.h b/src/soc/amd/cezanne/include/soc/cpu.h
index 27647ad..ec83349 100644
--- a/src/soc/amd/cezanne/include/soc/cpu.h
+++ b/src/soc/amd/cezanne/include/soc/cpu.h
@@ -5,4 +5,6 @@

#define CEZANNE_A0_CPUID	0x00a50f00

+void check_mca(void);
+
 #endif /* AMD_CEZANNE_CPU_H */
diff --git a/src/soc/amd/cezanne/mca.c b/src/soc/amd/cezanne/mca.c
new file mode 100644
index 0000000..7160256
--- /dev/null
+++ b/src/soc/amd/cezanne/mca.c
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <cpu/x86/msr.h>
+#include <soc/cpu.h>
+
+/* Check the Machine Check Architecture Extension registers */
+void check_mca(void)
+{
+	/* TODO: Implement MCAX register checking and BERT table generation. */
+
+	/* mca_clear_status uses the MCA registers and not the MCAX ones. Since they are
+	   aliases, we can use either set of registers. */
+	mca_clear_status();
+}