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/*
* 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 */
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