/*
|
* 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 */
|
