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

source/trusted-firmware/trusted-firmware-a-2.8/plat/arm/common/arm_cci.c

@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2016-2018, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <platform_def.h>
+
+#include <arch.h>
+#include <drivers/arm/cci.h>
+#include <lib/utils.h>
+#include <plat/arm/common/plat_arm.h>
+
+static const int cci_map[] = {
+	PLAT_ARM_CCI_CLUSTER0_SL_IFACE_IX,
+	PLAT_ARM_CCI_CLUSTER1_SL_IFACE_IX
+};
+
+/******************************************************************************
+ * The following functions are defined as weak to allow a platform to override
+ * the way ARM CCI driver is initialised and used.
+ *****************************************************************************/
+#pragma weak plat_arm_interconnect_init
+#pragma weak plat_arm_interconnect_enter_coherency
+#pragma weak plat_arm_interconnect_exit_coherency
+
+
+/******************************************************************************
+ * Helper function to initialize ARM CCI driver.
+ *****************************************************************************/
+void __init plat_arm_interconnect_init(void)
+{
+	cci_init(PLAT_ARM_CCI_BASE, cci_map, ARRAY_SIZE(cci_map));
+}
+
+/******************************************************************************
+ * Helper function to place current master into coherency
+ *****************************************************************************/
+void plat_arm_interconnect_enter_coherency(void)
+{
+	cci_enable_snoop_dvm_reqs(MPIDR_AFFLVL1_VAL(read_mpidr_el1()));
+}
+
+/******************************************************************************
+ * Helper function to remove current master from coherency
+ *****************************************************************************/
+void plat_arm_interconnect_exit_coherency(void)
+{
+	cci_disable_snoop_dvm_reqs(MPIDR_AFFLVL1_VAL(read_mpidr_el1()));
+}