Introduce ARM SiP service

This patch adds ARM SiP service for use by ARM standard platforms.
This service is added to support the SMC interface for the Performance
measurement framework(PMF).

Change-Id: I26f5712f9ab54f5f721dd4781e35a16f40aacc44
Signed-off-by: dp-arm <dimitris.papastamos@arm.com>

2 files changed, 109 insertions, 0 deletions

diff --git a/plat/arm/common/arm_common.mk b/plat/arm/common/arm_common.mk
index 98d72192..8f8d3fd8 100644
--- a/plat/arm/common/arm_common.mk
+++ b/plat/arm/common/arm_common.mk
@@ -144,6 +144,11 @@ BL31_SOURCES		+=	plat/arm/common/arm_bl31_setup.c		\
 				plat/common/aarch64/platform_mp_stack.S		\
 				plat/common/plat_psci_common.c
 
+ifeq (${ENABLE_PMF}, 1)
+BL31_SOURCES		+=	plat/arm/common/arm_sip_svc.c			\
+				lib/pmf/pmf_smc.c
+endif
+
 ifneq (${TRUSTED_BOARD_BOOT},0)
 
     # By default, ARM platforms use RSA keys
diff --git a/plat/arm/common/arm_sip_svc.c b/plat/arm/common/arm_sip_svc.c
new file mode 100644
index 00000000..eb8ec9ee
--- /dev/null
+++ b/plat/arm/common/arm_sip_svc.c
@@ -0,0 +1,104 @@
+/*
+ * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of ARM nor the names of its contributors may be used
+ * to endorse or promote products derived from this software without specific
+ * prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <arm_sip_svc.h>
+#include <debug.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)
+{
+	/*
+	 * 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_CALL_COUNT:
+		/*
+		 * Return the number of SiP Service Calls. PMF is the only
+		 * SiP service implemented; so return number of PMF calls
+		 */
+		SMC_RET1(handle, PMF_NUM_SMC_CALLS);
+
+	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
+);