xilinx: versal: Add get_api_version support

Add support for EEMI API get_api_verion.
Signed-off-by: Tejas Patel <tejas.patel@xilinx.com>
Signed-off-by: Jolly Shah <jolly.shah@xilinx.com>
Change-Id: Ic1ef90a194ae6164994a7fc5d8ff0b7b192636fe

plat/xilinx/versal/platform.mk

@@ -67,4 +67,5 @@ BL31_SOURCES		+=	lib/cpus/aarch64/cortex_a53.S			\
 				plat/xilinx/versal/versal_gicv3.c		\
 				plat/xilinx/versal/versal_ipi.c			\
 				plat/xilinx/versal/pm_service/pm_svc_main.c	\
+				plat/xilinx/versal/pm_service/pm_api_sys.c	\
 				plat/xilinx/versal/pm_service/pm_client.c

plat/xilinx/versal/pm_service/pm_api_sys.c

+/*
+ * Copyright (c) 2019, Xilinx, Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/*
+ * Versal system level PM-API functions and communication with PMC via
+ * IPI interrupts
+ */
+
+#include <pm_common.h>
+#include <pm_ipi.h>
+#include "pm_api_sys.h"
+#include "pm_client.h"
+
+/*********************************************************************
+ * Target module IDs macros
+ ********************************************************************/
+#define LIBPM_MODULE_ID		0x2
+#define LOADER_MODULE_ID	0x7
+
+/**
+ * Assigning of argument values into array elements.
+ */
+#define PM_PACK_PAYLOAD1(pl, mid, arg0) {	\
+	pl[0] = (uint32_t)((uint32_t)((arg0) & 0xFF) | (mid << 8)); \
+}
+
+/* PM API functions */
+
+/**
+ * pm_get_api_version() - Get version number of PMC PM firmware
+ * @version	Returns 32-bit version number of PMC Power Management Firmware
+ *
+ * @return	Returns status, either success or error+reason
+ */
+enum pm_ret_status pm_get_api_version(unsigned int *version)
+{
+	uint32_t payload[PAYLOAD_ARG_CNT];
+
+	/* Send request to the PMC */
+	PM_PACK_PAYLOAD1(payload, LIBPM_MODULE_ID, PM_GET_API_VERSION);
+	return pm_ipi_send_sync(primary_proc, payload, version, 1);
+}

plat/xilinx/versal/pm_service/pm_api_sys.h

+/*
+ * Copyright (c) 2019, Xilinx, Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef PM_API_SYS_H
+#define PM_API_SYS_H
+
+#include <stdint.h>
+
+/**********************************************************
+ * PM API function declarations
+ **********************************************************/
+
+enum pm_ret_status pm_get_api_version(unsigned int *version);
+
+#endif /* PM_API_SYS_H */

plat/xilinx/versal/pm_service/pm_defs.h

@@ -22,6 +22,9 @@
 #define XPM_DEVID_ACPU_0	APU_DEVID(XPM_NODEIDX_DEV_ACPU_0)
 #define XPM_DEVID_ACPU_1	APU_DEVID(XPM_NODEIDX_DEV_ACPU_1)
 
+/* PM API ids */
+#define PM_GET_API_VERSION		1U
+
 /*********************************************************************
  * Enum definitions
  ********************************************************************/