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Diffstat (limited to '')
| -rw-r--r-- | plat/arm/css/common/css_topology.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/plat/arm/css/common/css_topology.c b/plat/arm/css/common/css_topology.c new file mode 100644 index 0000000..8aca744 --- /dev/null +++ b/plat/arm/css/common/css_topology.c @@ -0,0 +1,48 @@ +/* + * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <assert.h> + +#include <plat/arm/common/plat_arm.h> +#include <plat/common/platform.h> + +#if ARM_PLAT_MT +#pragma weak plat_arm_get_cpu_pe_count +#endif + +/****************************************************************************** + * 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 (arm_check_mpidr(mpidr) == 0) { +#if ARM_PLAT_MT + assert((read_mpidr_el1() & MPIDR_MT_MASK) != 0); + + /* + * The DTB files don't provide the MT bit in the mpidr argument + * so set it manually before calculating core position + */ + mpidr |= MPIDR_MT_MASK; +#endif + return plat_arm_calc_core_pos(mpidr); + } + return -1; +} + +#if ARM_PLAT_MT +/****************************************************************************** + * This function returns the PE count within the physical cpu corresponding to + * `mpidr`. Now one cpu only have one thread, so just return 1. + *****************************************************************************/ +unsigned int plat_arm_get_cpu_pe_count(u_register_t mpidr) +{ + return 1; +} +#endif /* ARM_PLAT_MT */ |