diff options
Diffstat (limited to 'plat/nvidia/tegra/common/tegra_topology.c')
-rw-r--r-- | plat/nvidia/tegra/common/tegra_topology.c | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/plat/nvidia/tegra/common/tegra_topology.c b/plat/nvidia/tegra/common/tegra_topology.c new file mode 100644 index 0000000..220e697 --- /dev/null +++ b/plat/nvidia/tegra/common/tegra_topology.c @@ -0,0 +1,72 @@ +/* + * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * Neither the name of ARM nor the names of its contributors may be used + * to endorse or promote products derived from this software without specific + * prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include <arch_helpers.h> +#include <platform_def.h> +#include <psci.h> + +/******************************************************************************* + * This function implements a part of the critical interface between the psci + * generic layer and the platform to allow the former to detect the platform + * topology. psci queries the platform to determine how many affinity instances + * are present at a particular level for a given mpidr. + ******************************************************************************/ +unsigned int plat_get_aff_count(unsigned int aff_lvl, + unsigned long mpidr) +{ + switch (aff_lvl) { + case MPIDR_AFFLVL2: + /* Last supported affinity level */ + return 1; + + case MPIDR_AFFLVL1: + /* Return # of clusters */ + return PLATFORM_CLUSTER_COUNT; + + case MPIDR_AFFLVL0: + /* # of cpus per cluster */ + return PLATFORM_MAX_CPUS_PER_CLUSTER; + + default: + return PSCI_AFF_ABSENT; + } +} + +/******************************************************************************* + * This function implements a part of the critical interface between the psci + * generic layer and the platform to allow the former to detect the state of a + * affinity instance in the platform topology. psci queries the platform to + * determine whether an affinity instance is present or absent. + ******************************************************************************/ +unsigned int plat_get_aff_state(unsigned int aff_lvl, + unsigned long mpidr) +{ + return (aff_lvl <= MPIDR_AFFLVL2) ? PSCI_AFF_PRESENT : PSCI_AFF_ABSENT; +} |