freebsd-skq/sys/contrib/octeon-sdk/cvmx-coremask.h
jmallett 4948f4b8d5 Import the Cavium Simple Executive from the Cavium Octeon SDK. The Simple
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.
2010-07-20 07:19:43 +00:00

162 lines
4.4 KiB
C

/***********************license start***************
* Copyright (c) 2003-2008 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.
*
* 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
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* OF USE OR PERFORMANCE OF THE SOFTWARE LIES WITH YOU.
*
*
* For any questions regarding licensing please contact marketing@caviumnetworks.com
*
***********************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: 41586 $<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__ */