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/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (c) 2016 Cavium Inc. (support@cavium.com).
*
*/
/*
* Module to support operations on bitmap of cores. Coremask can be used to
* select a specific core, a group of cores, or all available cores, for
* initialization and differentiation of roles within a single shared binary
* executable image.
*
* The core numbers used in this file are the same value as what is found in
* the COP0_EBASE register and the rdhwr 0 instruction.
*
* For the CN78XX and other multi-node environments the core numbers are not
* contiguous. The core numbers for the CN78XX are as follows:
*
* Node 0: Cores 0 - 47
* Node 1: Cores 128 - 175
* Node 2: Cores 256 - 303
* Node 3: Cores 384 - 431
*
*/
#ifndef __CVMX_COREMASK_H__
#define __CVMX_COREMASK_H__
#define CVMX_MIPS_MAX_CORES 1024
/* bits per holder */
#define CVMX_COREMASK_ELTSZ 64
/* cvmx_coremask_t's size in u64 */
#define CVMX_COREMASK_BMPSZ (CVMX_MIPS_MAX_CORES / CVMX_COREMASK_ELTSZ)
/* cvmx_coremask_t */
struct cvmx_coremask {
u64 coremask_bitmap[CVMX_COREMASK_BMPSZ];
};
/*
* Is ``core'' set in the coremask?
*/
static inline bool cvmx_coremask_is_core_set(const struct cvmx_coremask *pcm,
int core)
{
int n, i;
n = core % CVMX_COREMASK_ELTSZ;
i = core / CVMX_COREMASK_ELTSZ;
return (pcm->coremask_bitmap[i] & ((u64)1 << n)) != 0;
}
/*
* Make a copy of a coremask
*/
static inline void cvmx_coremask_copy(struct cvmx_coremask *dest,
const struct cvmx_coremask *src)
{
memcpy(dest, src, sizeof(*dest));
}
/*
* Set the lower 64-bit of the coremask.
*/
static inline void cvmx_coremask_set64(struct cvmx_coremask *pcm,
uint64_t coremask_64)
{
pcm->coremask_bitmap[0] = coremask_64;
}
/*
* Clear ``core'' from the coremask.
*/
static inline void cvmx_coremask_clear_core(struct cvmx_coremask *pcm, int core)
{
int n, i;
n = core % CVMX_COREMASK_ELTSZ;
i = core / CVMX_COREMASK_ELTSZ;
pcm->coremask_bitmap[i] &= ~(1ull << n);
}
#endif /* __CVMX_COREMASK_H__ */
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