[coreboot-gerrit] Change in coreboot[master]: include/cpu/x86/msr: add mca_get_bank_count function

[Felix Held (Code Review)]

Felix Held has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/56183 )

Change subject: include/cpu/x86/msr: add mca_get_bank_count function
......................................................................

include/cpu/x86/msr: add mca_get_bank_count function

In multiple locations within the coreboot tree the IA32_MCG_CAP MSR gets
read and masked with MCA_BANKS_MASK to get the number of available MCA
banks on the CPU, so add this to the common code to avoid duplication
of code.

Change-Id: Id118a900edbe1f67aabcd109d2654c167b6345ea
Signed-off-by: Felix Held 
---
M src/include/cpu/x86/msr.h
1 file changed, 7 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/83/56183/1

diff --git a/src/include/cpu/x86/msr.h b/src/include/cpu/x86/msr.h
index bc367d7..54d9059 100644
--- a/src/include/cpu/x86/msr.h
+++ b/src/include/cpu/x86/msr.h
@@ -155,6 +155,13 @@

#endif /* CONFIG_SOC_SETS_MSRS */

+/* get MCA bank count from MSR */
+static inline unsigned int mca_get_bank_count(void)
+{
+	msr_t msr = rdmsr(IA32_MCG_CAP);
+	return msr.lo & MCA_BANKS_MASK;
+}
+
 /* Helpers for interpreting MC[i]_STATUS */

static inline int mca_valid(msr_t msr)