OCC startup (istep 21.1)

src/include/cpu/power/mvpd.h

@@ -9,7 +9,7 @@
 /* Single bucket within #V keyword of version 3 */
 struct voltage_data
 {
-	uint16_t freq;
+	uint16_t freq;		// MHz
 	uint16_t vdd_voltage;
 	uint16_t idd_current;
 	uint16_t vcs_voltage;

src/include/cpu/power/occ.h

@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef CPU_PPC64_OCC_H
+#define CPU_PPC64_OCC_H
+
+#include <stdint.h>
+
+void writeOCCSRAM(uint32_t address, uint64_t *buffer, size_t data_length);
+void readOCCSRAM(uint32_t address, uint64_t *buffer, size_t data_length);
+void write_occ_command(uint64_t write_data);
+void clear_occ_special_wakeups(uint64_t cores);
+void special_occ_wakeup_disable(uint64_t cores);
+void occ_start_from_mem(void);
+
+void pm_occ_fir_init(void);
+void pm_pba_fir_init(void);
+
+#endif /* CPU_PPC64_OCC_H */

src/soc/ibm/power9/Makefile.inc

@@ -41,5 +41,6 @@ ramstage-y += pstates.c
 ramstage-y += xive.c
 ramstage-y += int_vectors.S
 ramstage-y += i2c.c
+ramstage-y += occ.c
 
 endif