4948f4b8d5
Executive is a library that can be used by standalone applications and kernels to abstract access to Octeon SoC and board-specific hardware and facilities. The FreeBSD port to Octeon will be updated to use this where possible.
162 lines
4.4 KiB
C
162 lines
4.4 KiB
C
/***********************license start***************
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* Copyright (c) 2003-2008 Cavium Networks (support@cavium.com). All rights
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* reserved.
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*
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* * Neither the name of Cavium Networks nor the names of
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* its contributors may be used to endorse or promote products
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* derived from this software without specific prior written
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* permission.
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*
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* TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
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* AND WITH ALL FAULTS AND CAVIUM NETWORKS MAKES NO PROMISES, REPRESENTATIONS
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* OR WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH
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* RESPECT TO THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY
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* REPRESENTATION OR DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT
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* DEFECTS, AND CAVIUM SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES
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* OF TITLE, MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR
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* PURPOSE, LACK OF VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET
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* POSSESSION OR CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT
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* OF USE OR PERFORMANCE OF THE SOFTWARE LIES WITH YOU.
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*
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*
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* For any questions regarding licensing please contact marketing@caviumnetworks.com
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*
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***********************license end**************************************/
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/**
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* @file
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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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* <hr>$Revision: 41586 $<hr>
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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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#include "cvmx-asm.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* coremask is simply unsigned int (32 bits).
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*
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* NOTE: supports up to 32 cores maximum.
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*
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* union of coremasks is simply bitwise-or.
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* intersection of coremasks is simply bitwise-and.
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*
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*/
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#define CVMX_COREMASK_MAX 0xFFFFFFFFu /* maximum supported mask */
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/**
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* Compute coremask for a specific core.
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*
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* @param core_id The core ID
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*
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* @return coremask for a specific core
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*
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*/
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static inline unsigned int cvmx_coremask_core(unsigned int core_id)
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{
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return (1u << core_id);
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}
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/**
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* Compute coremask for num_cores cores starting with core 0.
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*
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* @param num_cores number of cores
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*
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* @return coremask for num_cores cores
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*
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*/
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static inline unsigned int cvmx_coremask_numcores(unsigned int num_cores)
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{
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return (CVMX_COREMASK_MAX >> (32 - num_cores));
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}
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/**
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* Compute coremask for a range of cores from core low to core high.
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*
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* @param low first core in the range
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* @param high last core in the range
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*
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* @return coremask for the range of cores
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*
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*/
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static inline unsigned int cvmx_coremask_range(unsigned int low, unsigned int high)
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{
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return ((CVMX_COREMASK_MAX >> (31 - high + low)) << low);
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}
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/**
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* Test to see if current core is a member of coremask.
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*
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* @param coremask the coremask to test against
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*
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* @return 1 if current core is a member of coremask, 0 otherwise
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*
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*/
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static inline int cvmx_coremask_is_member(unsigned int coremask)
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{
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return ((cvmx_coremask_core(cvmx_get_core_num()) & coremask) != 0);
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}
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/**
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* Test to see if current core is first core in coremask.
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*
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* @param coremask the coremask to test against
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*
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* @return 1 if current core is first core in the coremask, 0 otherwise
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*
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*/
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static inline int cvmx_coremask_first_core(unsigned int coremask)
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{
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return cvmx_coremask_is_member(coremask)
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&& ((cvmx_get_core_num() == 0) ||
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((cvmx_coremask_numcores(cvmx_get_core_num()) & coremask) == 0));
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}
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/**
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* Wait (stall) until all cores in the given coremask has reached this point
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* in the program execution before proceeding.
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*
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* @param coremask the group of cores performing the barrier sync
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*
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*/
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extern void cvmx_coremask_barrier_sync(unsigned int coremask);
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#ifdef __cplusplus
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}
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#endif
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#endif /* __CVMX_COREMASK_H__ */
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