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/***********************license start*************** * Copyright (c) 2003-2010 Cavium Networks (support@cavium.com). All rights * reserved. * * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are * met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * * Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials provided * with the distribution. * * Neither the name of Cavium Networks nor the names of * its contributors may be used to endorse or promote products * derived from this software without specific prior written * permission. * This Software, including technical data, may be subject to U.S. export control * laws, including the U.S. Export Administration Act and its associated * regulations, and may be subject to export or import regulations in other * countries. * TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS" * AND WITH ALL FAULTS AND CAVIUM NETWORKS MAKES NO PROMISES, REPRESENTATIONS OR * WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT TO * THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY REPRESENTATION OR * DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT DEFECTS, AND CAVIUM * SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES OF TITLE, * MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR PURPOSE, LACK OF * VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET POSSESSION OR * CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT OF USE OR * PERFORMANCE OF THE SOFTWARE LIES WITH YOU. ***********************license end**************************************/ /** * @file * * 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. * * <hr>$Revision: 49448 $<hr> * */ #ifndef __CVMX_COREMASK_H__ #define __CVMX_COREMASK_H__ #include "cvmx-asm.h" #ifdef __cplusplus extern "C" { #endif /* * coremask is simply unsigned int (32 bits). * * NOTE: supports up to 32 cores maximum. * * union of coremasks is simply bitwise-or. * intersection of coremasks is simply bitwise-and. * */ #define CVMX_COREMASK_MAX 0xFFFFFFFFu /* maximum supported mask */ /** * Compute coremask for a specific core. * * @param core_id The core ID * * @return coremask for a specific core * */ static inline unsigned int cvmx_coremask_core(unsigned int core_id) { return (1u << core_id); } /** * Compute coremask for num_cores cores starting with core 0. * * @param num_cores number of cores * * @return coremask for num_cores cores * */ static inline unsigned int cvmx_coremask_numcores(unsigned int num_cores) { return (CVMX_COREMASK_MAX >> (32 - num_cores)); } /** * Compute coremask for a range of cores from core low to core high. * * @param low first core in the range * @param high last core in the range * * @return coremask for the range of cores * */ static inline unsigned int cvmx_coremask_range(unsigned int low, unsigned int high) { return ((CVMX_COREMASK_MAX >> (31 - high + low)) << low); } /** * Test to see if current core is a member of coremask. * * @param coremask the coremask to test against * * @return 1 if current core is a member of coremask, 0 otherwise * */ static inline int cvmx_coremask_is_member(unsigned int coremask) { return ((cvmx_coremask_core(cvmx_get_core_num()) & coremask) != 0); } /** * Test to see if current core is first core in coremask. * * @param coremask the coremask to test against * * @return 1 if current core is first core in the coremask, 0 otherwise * */ static inline int cvmx_coremask_first_core(unsigned int coremask) { return cvmx_coremask_is_member(coremask) && ((cvmx_get_core_num() == 0) || ((cvmx_coremask_numcores(cvmx_get_core_num()) & coremask) == 0)); } /** * Wait (stall) until all cores in the given coremask has reached this point * in the program execution before proceeding. * * @param coremask the group of cores performing the barrier sync * */ extern void cvmx_coremask_barrier_sync(unsigned int coremask); #ifdef __cplusplus } #endif #endif /* __CVMX_COREMASK_H__ */