1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
|
/***********************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__ */
|
