feat(intel): add intel_rsu_update() to sip_svc_v2

Add smc function id for intel_rsu_update() in sip_svc_v2. For temporarily
saving the RSU application image address before a cold reset is
issued.

Signed-off-by: Mahesh Rao <mahesh.rao@intel.com>
Signed-off-by: Jit Loon Lim <jit.loon.lim@intel.com>
Change-Id: I43bc7bd5aa5fa9238bceba1d826bf0a34ff87adb

plat/intel/soc/common/include/socfpga_sip_svc.h

@@ -167,6 +167,7 @@
 #define INTEL_SIP_SMC_V2_REG_WRITE				0xC2000402
 #define INTEL_SIP_SMC_V2_REG_UPDATE				0xC2000403
 #define INTEL_SIP_SMC_V2_HPS_SET_BRIDGES			0xC2000404
+#define INTEL_SIP_SMC_V2_RSU_UPDATE_ADDR			0xC2000405
 
 /* V2: Mailbox function identifier */
 #define INTEL_SIP_SMC_V2_MAILBOX_SEND_COMMAND			0xC2000420
@@ -185,7 +186,7 @@
 /*
  * Increase if there is new SMC function ID being added
  */
-#define SIP_SVC_VERSION_MINOR					1
+#define SIP_SVC_VERSION_MINOR					2
 
 
 /* Structure Definitions */
@@ -219,6 +220,9 @@ uint32_t intel_secure_reg_write(uint64_t reg_addr, uint32_t val,
 uint32_t intel_secure_reg_update(uint64_t reg_addr, uint32_t mask,
 				 uint32_t val, uint32_t *retval);
 
+/* Set RSU update address*/
+uint32_t intel_rsu_update(uint64_t update_address);
+
 /* Miscellaneous HPS services */
 uint32_t intel_hps_set_bridges(uint64_t enable, uint64_t mask);
 

plat/intel/soc/common/socfpga_sip_svc.c

@@ -442,7 +442,7 @@ static uint32_t intel_rsu_status(uint64_t *respbuf, unsigned int respbuf_sz)
 	return INTEL_SIP_SMC_STATUS_OK;
 }
 
-static uint32_t intel_rsu_update(uint64_t update_address)
+uint32_t intel_rsu_update(uint64_t update_address)
 {
 	if (update_address > SIZE_MAX) {
 		return INTEL_SIP_SMC_STATUS_REJECTED;

plat/intel/soc/common/socfpga_sip_svc_v2.c

@@ -158,6 +158,10 @@ uintptr_t sip_smc_handler_v2(uint32_t smc_fid,
 		status = intel_hps_set_bridges(x2, x3);
 		SMC_RET2(handle, status, x1);
 
+	case INTEL_SIP_SMC_V2_RSU_UPDATE_ADDR:
+		status = intel_rsu_update(x2);
+		SMC_RET2(handle, status, x1);
+
 	case INTEL_SIP_SMC_V2_MAILBOX_SEND_COMMAND:
 		status = intel_v2_mbox_send_cmd(x1, (uint32_t *)x2, x3);
 		SMC_RET2(handle, status, x1);