GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/trusted-firmware/trusted-firmware-a-2.8/lib/pmf/pmf_smc.c

@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2016-2018, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+
+#include <common/debug.h>
+#include <lib/pmf/pmf.h>
+#include <plat/common/platform.h>
+#include <smccc_helpers.h>
+
+/*
+ * This function is responsible for handling all PMF SMC calls.
+ */
+uintptr_t pmf_smc_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 rc;
+	unsigned long long ts_value;
+
+	if (((smc_fid >> FUNCID_CC_SHIFT) & FUNCID_CC_MASK) == SMC_32) {
+
+		x1 = (uint32_t)x1;
+		x2 = (uint32_t)x2;
+		x3 = (uint32_t)x3;
+
+		if (smc_fid == PMF_SMC_GET_TIMESTAMP_32) {
+			/*
+			 * Return error code and the captured
+			 * time-stamp to the caller.
+			 * x0 --> error code.
+			 * x1 - x2 --> time-stamp value.
+			 */
+			rc = pmf_get_timestamp_smc((unsigned int)x1, x2,
+					(unsigned int)x3, &ts_value);
+			SMC_RET3(handle, rc, (uint32_t)ts_value,
+					(uint32_t)(ts_value >> 32));
+		}
+	} else {
+		if (smc_fid == PMF_SMC_GET_TIMESTAMP_64) {
+			/*
+			 * Return error code and the captured
+			 * time-stamp to the caller.
+			 * x0 --> error code.
+			 * x1 --> time-stamp value.
+			 */
+			rc = pmf_get_timestamp_smc((unsigned int)x1, x2,
+					(unsigned int)x3, &ts_value);
+			SMC_RET2(handle, rc, ts_value);
+		}
+	}
+
+	WARN("Unimplemented PMF Call: 0x%x \n", smc_fid);
+	SMC_RET1(handle, SMC_UNK);
+}