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

source/trusted-firmware/trusted-firmware-a-2.8/plat/marvell/armada/common/marvell_topology.c

@@ -0,0 +1,84 @@
+/*
+ * Copyright (C) 2018 Marvell International Ltd.
+ *
+ * SPDX-License-Identifier:     BSD-3-Clause
+ * https://spdx.org/licenses
+ */
+
+#include <plat_marvell.h>
+
+/* The power domain tree descriptor */
+unsigned char marvell_power_domain_tree_desc[PLAT_MARVELL_CLUSTER_COUNT + 1];
+
+/*****************************************************************************
+ * This function dynamically constructs the topology according to
+ * PLAT_MARVELL_CLUSTER_COUNT and returns it.
+ *****************************************************************************
+ */
+const unsigned char *plat_get_power_domain_tree_desc(void)
+{
+	int i;
+
+	/*
+	 * The power domain tree does not have a single system level power
+	 * domain i.e. a single root node. The first entry in the power domain
+	 * descriptor specifies the number of power domains at the highest power
+	 * level.
+	 * For Marvell Platform this is the number of cluster power domains.
+	 */
+	marvell_power_domain_tree_desc[0] = PLAT_MARVELL_CLUSTER_COUNT;
+
+	for (i = 0; i < PLAT_MARVELL_CLUSTER_COUNT; i++)
+		marvell_power_domain_tree_desc[i + 1] =
+					PLAT_MARVELL_CLUSTER_CORE_COUNT;
+
+	return marvell_power_domain_tree_desc;
+}
+
+/*****************************************************************************
+ * This function validates an MPIDR by checking whether it falls within the
+ * acceptable bounds. An error code (-1) is returned if an incorrect mpidr
+ * is passed.
+ *****************************************************************************
+ */
+int marvell_check_mpidr(u_register_t mpidr)
+{
+	unsigned int nb_id, cluster_id, cpu_id;
+
+	mpidr &= MPIDR_AFFINITY_MASK;
+
+	if (mpidr & ~(MPIDR_CLUSTER_MASK | MPIDR_CPU_MASK |
+	    MPIDR_AFFLVL_MASK << MPIDR_AFF2_SHIFT))
+		return -1;
+
+	/* Get north bridge ID */
+	nb_id = MPIDR_AFFLVL3_VAL(mpidr);
+	cluster_id = MPIDR_AFFLVL1_VAL(mpidr);
+	cpu_id = MPIDR_AFFLVL0_VAL(mpidr);
+
+	if (nb_id >= PLAT_MARVELL_CLUSTER_COUNT)
+		return -1;
+
+	if (cluster_id >= PLAT_MARVELL_CLUSTER_COUNT)
+		return -1;
+
+	if (cpu_id >= PLAT_MARVELL_CLUSTER_CORE_COUNT)
+		return -1;
+
+	return 0;
+}
+
+/*****************************************************************************
+ * This function implements a part of the critical interface between the PSCI
+ * generic layer and the platform that allows the former to query the platform
+ * to convert an MPIDR to a unique linear index. An error code (-1) is returned
+ * in case the MPIDR is invalid.
+ *****************************************************************************
+ */
+int plat_core_pos_by_mpidr(u_register_t mpidr)
+{
+	if (marvell_check_mpidr(mpidr) == -1)
+		return -1;
+
+	return plat_marvell_calc_core_pos(mpidr);
+}