From 102b0d2daa97dae68d3eed54d8fe37a9cc38a892 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 28 Apr 2024 11:13:47 +0200 Subject: Adding upstream version 2.8.0+dfsg. Signed-off-by: Daniel Baumann --- plat/hisilicon/hikey/hikey_topology.c | 66 +++++++++++++++++++++++++++++++++++ 1 file changed, 66 insertions(+) create mode 100644 plat/hisilicon/hikey/hikey_topology.c (limited to 'plat/hisilicon/hikey/hikey_topology.c') diff --git a/plat/hisilicon/hikey/hikey_topology.c b/plat/hisilicon/hikey/hikey_topology.c new file mode 100644 index 0000000..7890eb7 --- /dev/null +++ b/plat/hisilicon/hikey/hikey_topology.c @@ -0,0 +1,66 @@ +/* + * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include + +#include +#include + +/* + * The HiKey power domain tree descriptor. The cluster power domains + * are arranged so that when the PSCI generic code creates the power + * domain tree, the indices of the CPU power domain nodes it allocates + * match the linear indices returned by plat_core_pos_by_mpidr(). + */ +const unsigned char hikey_power_domain_tree_desc[] = { + /* Number of root nodes */ + 1, + /* Number of clusters */ + PLATFORM_CLUSTER_COUNT, + /* Number of children for the first cluster node */ + PLATFORM_CORE_COUNT_PER_CLUSTER, + /* Number of children for the second cluster node */ + PLATFORM_CORE_COUNT_PER_CLUSTER, +}; + +/******************************************************************************* + * This function returns the HiKey topology tree information. + ******************************************************************************/ +const unsigned char *plat_get_power_domain_tree_desc(void) +{ + return hikey_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; + + mpidr &= MPIDR_AFFINITY_MASK; + + if (mpidr & ~(MPIDR_CLUSTER_MASK | MPIDR_CPU_MASK)) + 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_CORE_COUNT_PER_CLUSTER) + return -1; + + return (cpu_id + (cluster_id * 4)); +} -- cgit v1.2.3