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/*
* Definitions specific to SMP platforms.
*
* Copyright (C) 2013 ARM Ltd.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __ASM_SMP_PLAT_H
#define __ASM_SMP_PLAT_H
#include <linux/cpumask.h>
#include <asm/types.h>
struct mpidr_hash {
u64 mask;
u32 shift_aff[4];
u32 bits;
};
extern struct mpidr_hash mpidr_hash;
static inline u32 mpidr_hash_size(void)
{
return 1 << mpidr_hash.bits;
}
/*
* Logical CPU mapping.
*/
extern u64 __cpu_logical_map[NR_CPUS];
#define cpu_logical_map(cpu) __cpu_logical_map[cpu]
/*
* Retrieve logical cpu index corresponding to a given MPIDR.Aff*
* - mpidr: MPIDR.Aff* bits to be used for the look-up
*
* Returns the cpu logical index or -EINVAL on look-up error
*/
static inline int get_logical_index(u64 mpidr)
{
int cpu;
for (cpu = 0; cpu < nr_cpu_ids; cpu++)
if (cpu_logical_map(cpu) == mpidr)
return cpu;
return -EINVAL;
}
#endif /* __ASM_SMP_PLAT_H */
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