ti: k3: common: Implement topology functions

These functions describe the layout of the cores and clusters in order to
support the PSCI framework.
Signed-off-by: Benjamin Fair <b-fair@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Andrew F. Davis <afd@ti.com>

plat/ti/k3/common/k3_topology.c

+/*
+ * Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <platform_def.h>
+#include <psci.h>
+
+/* The power domain tree descriptor */
+static unsigned char power_domain_tree_desc[] = {
+	PLATFORM_CLUSTER_COUNT,
+	K3_CLUSTER0_CORE_COUNT,
+#if K3_CLUSTER1_MSMC_PORT != UNUSED
+	K3_CLUSTER1_CORE_COUNT,
+#endif /* K3_CLUSTER1_MSMC_PORT != UNUSED */
+#if K3_CLUSTER2_MSMC_PORT != UNUSED
+	K3_CLUSTER2_CORE_COUNT,
+#endif /* K3_CLUSTER2_MSMC_PORT != UNUSED */
+#if K3_CLUSTER3_MSMC_PORT != UNUSED
+	K3_CLUSTER3_CORE_COUNT,
+#endif /* K3_CLUSTER3_MSMC_PORT != UNUSED */
+};
+
+const unsigned char *plat_get_power_domain_tree_desc(void)
+{
+	return power_domain_tree_desc;
+}
+
+int plat_core_pos_by_mpidr(u_register_t mpidr)
+{
+	unsigned int cpu_id;
+
+	mpidr &= MPIDR_AFFINITY_MASK;
+
+	if (mpidr & ~(MPIDR_CLUSTER_MASK | MPIDR_CPU_MASK))
+		return -1;
+
+	cpu_id = MPIDR_AFFLVL0_VAL(mpidr);
+
+	switch (MPIDR_AFFLVL1_VAL(mpidr)) {
+	case K3_CLUSTER0_MSMC_PORT:
+		if (cpu_id < K3_CLUSTER0_CORE_COUNT)
+			return cpu_id;
+		return -1;
+#if K3_CLUSTER1_MSMC_PORT != UNUSED
+	case K3_CLUSTER1_MSMC_PORT:
+		if (cpu_id < K3_CLUSTER1_CORE_COUNT)
+			return K3_CLUSTER0_CORE_COUNT + cpu_id;
+		return -1;
+#endif /* K3_CLUSTER1_MSMC_PORT != UNUSED */
+#if K3_CLUSTER2_MSMC_PORT != UNUSED
+	case K3_CLUSTER2_MSMC_PORT:
+		if (cpu_id < K3_CLUSTER2_CORE_COUNT)
+			return K3_CLUSTER0_CORE_COUNT +
+			       K3_CLUSTER1_CORE_COUNT + cpu_id;
+		return -1;
+#endif /* K3_CLUSTER2_MSMC_PORT != UNUSED */
+#if K3_CLUSTER3_MSMC_PORT != UNUSED
+	case K3_CLUSTER3_MSMC_PORT:
+		if (cpu_id < K3_CLUSTER3_CORE_COUNT)
+			return K3_CLUSTER0_CORE_COUNT +
+			       K3_CLUSTER1_CORE_COUNT +
+			       K3_CLUSTER2_CORE_COUNT + cpu_id;
+		return -1;
+#endif /* K3_CLUSTER3_MSMC_PORT != UNUSED */
+	default:
+		return -1;
+	}
+}

plat/ti/k3/common/plat_common.mk

@@ -36,3 +36,4 @@ PLAT_BL_COMMON_SOURCES	+=	\
 BL31_SOURCES		+=	\
 				${PLAT_PATH}/common/k3_bl31_setup.c	\
 				${PLAT_PATH}/common/k3_helpers.S	\
+				${PLAT_PATH}/common/k3_topology.c	\