1 files changed, 105 insertions, 0 deletions
diff --git a/plat/arm/common/arm_sip_svc.c b/plat/arm/common/arm_sip_svc.c
new file mode 100644
index 00000000..7fe61019
--- /dev/null
+++ b/plat/arm/common/arm_sip_svc.c
@@ -0,0 +1,105 @@
+/*
+ * Copyright (c) 2016-2017, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <arm_sip_svc.h>
+#include <debug.h>
+#include <plat_arm.h>
+#include <pmf.h>
+#include <runtime_svc.h>
+#include <stdint.h>
+#include <uuid.h>
+
+
+/* ARM SiP Service UUID */
+DEFINE_SVC_UUID(arm_sip_svc_uid,
+		0xe2756d55, 0x3360, 0x4bb5, 0xbf, 0xf3,
+		0x62, 0x79, 0xfd, 0x11, 0x37, 0xff);
+
+static int arm_sip_setup(void)
+{
+	if (pmf_setup() != 0)
+		return 1;
+	return 0;
+}
+
+/*
+ * This function handles ARM defined SiP Calls
+ */
+static uintptr_t arm_sip_handler(unsigned int smc_fid,
+			u_register_t x1,
+			u_register_t x2,
+			u_register_t x3,
+			u_register_t x4,
+			void *cookie,
+			void *handle,
+			u_register_t flags)
+{
+	int call_count = 0;
+
+	/*
+	 * Dispatch PMF calls to PMF SMC handler and return its return
+	 * value
+	 */
+	if (is_pmf_fid(smc_fid)) {
+		return pmf_smc_handler(smc_fid, x1, x2, x3, x4, cookie,
+				handle, flags);
+	}
+
+	switch (smc_fid) {
+	case ARM_SIP_SVC_EXE_STATE_SWITCH: {
+		u_register_t pc;
+
+		/* Allow calls from non-secure only */
+		if (!is_caller_non_secure(flags))
+			SMC_RET1(handle, STATE_SW_E_DENIED);
+
+		/* Validate supplied entry point */
+		pc = (u_register_t) ((x1 << 32) | (uint32_t) x2);
+		if (arm_validate_ns_entrypoint(pc))
+			SMC_RET1(handle, STATE_SW_E_PARAM);
+
+		/*
+		 * Pointers used in execution state switch are all 32 bits wide
+		 */
+		return arm_execution_state_switch(smc_fid, (uint32_t) x1,
+				(uint32_t) x2, (uint32_t) x3, (uint32_t) x4,
+				handle);
+		}
+
+	case ARM_SIP_SVC_CALL_COUNT:
+		/* PMF calls */
+		call_count += PMF_NUM_SMC_CALLS;
+
+		/* State switch call */
+		call_count += 1;
+
+		SMC_RET1(handle, call_count);
+
+	case ARM_SIP_SVC_UID:
+		/* Return UID to the caller */
+		SMC_UUID_RET(handle, arm_sip_svc_uid);
+
+	case ARM_SIP_SVC_VERSION:
+		/* Return the version of current implementation */
+		SMC_RET2(handle, ARM_SIP_SVC_VERSION_MAJOR, ARM_SIP_SVC_VERSION_MINOR);
+
+	default:
+		WARN("Unimplemented ARM SiP Service Call: 0x%x \n", smc_fid);
+		SMC_RET1(handle, SMC_UNK);
+	}
+
+}
+
+
+/* Define a runtime service descriptor for fast SMC calls */
+DECLARE_RT_SVC(
+	arm_sip_svc,
+	OEN_SIP_START,
+	OEN_SIP_END,
+	SMC_TYPE_FAST,
+	arm_sip_setup,
+	arm_sip_handler
+);