intel/common/cpu: Add function to get microcode patch pointer

Add mp_current_microcode() function to get the microcode patch pointer.
Use this function to avoid reading the microcode patch from the boot
media. init_cpus() would initialize microcode_patch global variable to
point to microcode patch in boot media and this function can be used
to access the pointer.

Change-Id: Ia71395f4e5b2b4fcd4e4660b66e8beb99eda65b8
Signed-off-by: Pratik Prajapati <pratikkumar.v.prajapati@intel.com>
Reviewed-on: https://review.coreboot.org/21061
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

2 files changed, 20 insertions, 1 deletions

diff --git a/src/soc/intel/common/block/cpu/mp_init.c b/src/soc/intel/common/block/cpu/mp_init.c
index fd8b5db89e..5bbbb2c01e 100644
--- a/src/soc/intel/common/block/cpu/mp_init.c
+++ b/src/soc/intel/common/block/cpu/mp_init.c
@@ -93,6 +93,17 @@ int get_cpu_count(void)
 }
 
 /*
+ * Function to get the microcode patch pointer. Use this function to avoid
+ * reading the microcode patch from the boot media. init_cpus() would
+ * initialize microcode_patch global variable to point to microcode patch
+ * in boot media and this function can be used to access the pointer.
+ */
+const void *intel_mp_current_microcode(void)
+{
+	return microcode_patch;
+}
+
+/*
  * MP Init callback function(get_microcode_info) to find the Microcode at
  * Pre MP Init phase. This function is common among all SOCs and thus its in
  * Common CPU block.
@@ -102,7 +113,7 @@ int get_cpu_count(void)
  */
 void get_microcode_info(const void **microcode, int *parallel)
 {
-	*microcode =microcode_patch;
+	*microcode = intel_mp_current_microcode();
 	*parallel = 1;
 }
 
diff --git a/src/soc/intel/common/block/include/intelblocks/mp_init.h b/src/soc/intel/common/block/include/intelblocks/mp_init.h
index 1e5531cfd5..d123207c58 100644
--- a/src/soc/intel/common/block/include/intelblocks/mp_init.h
+++ b/src/soc/intel/common/block/include/intelblocks/mp_init.h
@@ -43,6 +43,14 @@
 int get_cpu_count(void);
 
 /*
+ * Function to get the microcode patch pointer. Use this function to avoid
+ * reading the microcode patch from the boot media. init_cpus() would
+ * initialize microcode_patch global variable to point to microcode patch
+ * in boot media and this function can be used to access the pointer.
+ */
+const void *intel_mp_current_microcode(void);
+
+/*
  * MP Init callback function(get_microcode_info) to find the Microcode at
  * Pre MP Init phase. This function is common among all SOCs and thus its in
  * Common CPU block.