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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__ */
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