feat(mt8188): initialize platform for MediaTek MT8188
- Add basic platform setup.
- Add MT8188 documentation at docs/plat/.
- Add generic CPU helper functions.
- Add basic register address.
- Add mtk_pm.c in lib/pm
TEST=build pass
BUG=b:236331724
Change-Id: I5f8617c42ffba2c9d3a16f3980cb75fda5624031
diff --git a/plat/mediatek/mt8188/plat_topology.c b/plat/mediatek/mt8188/plat_topology.c
new file mode 100644
index 0000000..9fa2855
--- /dev/null
+++ b/plat/mediatek/mt8188/plat_topology.c
@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2022, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <arch.h>
+#include <arch_helpers.h>
+#include <lib/psci/psci.h>
+
+#include <plat_helpers.h>
+#include <platform_def.h>
+
+const unsigned char mtk_power_domain_tree_desc[] = {
+ /* Number of root nodes */
+ PLATFORM_SYSTEM_COUNT,
+ /* Number of children for the root node */
+ PLATFORM_MCUSYS_COUNT,
+ /* Number of children for the mcusys node */
+ PLATFORM_CLUSTER_COUNT,
+ /* Number of children for the first cluster node */
+ PLATFORM_CLUSTER0_CORE_COUNT,
+};
+
+const unsigned char *plat_get_power_domain_tree_desc(void)
+{
+ return mtk_power_domain_tree_desc;
+}
+
+/*******************************************************************************
+ * 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)
+{
+ unsigned int cluster_id, cpu_id;
+
+ if ((read_mpidr() & MPIDR_MT_MASK) != 0) {
+ /* ARMv8.2 arch */
+ if ((mpidr & (MPIDR_AFFLVL_MASK << MPIDR_AFF0_SHIFT)) != 0) {
+ return -1;
+ }
+ return plat_mediatek_calc_core_pos(mpidr);
+ }
+
+ mpidr &= MPIDR_AFFINITY_MASK;
+
+ if ((mpidr & ~(MPIDR_CLUSTER_MASK | MPIDR_CPU_MASK)) != 0) {
+ return -1;
+ }
+
+ cluster_id = (mpidr >> MPIDR_AFF1_SHIFT) & MPIDR_AFFLVL_MASK;
+ cpu_id = (mpidr >> MPIDR_AFF0_SHIFT) & MPIDR_AFFLVL_MASK;
+
+ if (cluster_id >= PLATFORM_CLUSTER_COUNT) {
+ return -1;
+ }
+
+ /*
+ * Validate cpu_id by checking whether it represents a CPU in
+ * one of the two clusters present on the platform.
+ */
+ if (cpu_id >= PLATFORM_MAX_CPUS_PER_CLUSTER) {
+ return -1;
+ }
+
+ return (cpu_id + (cluster_id * 8));
+}