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