DPDK  2.2.0
rte_cycles.h
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1 /*-
2  * BSD LICENSE
3  *
4  * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
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8  * modification, are permitted provided that the following conditions
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12  * notice, this list of conditions and the following disclaimer.
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15  * the documentation and/or other materials provided with the
16  * distribution.
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18  * contributors may be used to endorse or promote products derived
19  * from this software without specific prior written permission.
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33 /* BSD LICENSE
34  *
35  * Copyright(c) 2013 6WIND.
36  *
37  * Redistribution and use in source and binary forms, with or without
38  * modification, are permitted provided that the following conditions
39  * are met:
40  *
41  * * Redistributions of source code must retain the above copyright
42  * notice, this list of conditions and the following disclaimer.
43  * * Redistributions in binary form must reproduce the above copyright
44  * notice, this list of conditions and the following disclaimer in
45  * the documentation and/or other materials provided with the
46  * distribution.
47  * * Neither the name of 6WIND S.A. nor the names of its
48  * contributors may be used to endorse or promote products derived
49  * from this software without specific prior written permission.
50  *
51  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
52  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
53  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
54  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
55  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
56  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
57  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
58  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
59  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
60  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
61  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
62  */
63 
64 #ifndef _RTE_CYCLES_H_
65 #define _RTE_CYCLES_H_
66 
73 #include <stdint.h>
74 #include <rte_debug.h>
75 #include <rte_atomic.h>
76 
77 #define MS_PER_S 1000
78 #define US_PER_S 1000000
79 #define NS_PER_S 1000000000
80 
81 enum timer_source {
82  EAL_TIMER_TSC = 0,
83  EAL_TIMER_HPET
84 };
85 extern enum timer_source eal_timer_source;
86 
93 uint64_t
94 rte_get_tsc_hz(void);
95 
102 static inline uint64_t
103 rte_get_tsc_cycles(void);
104 
105 #ifdef RTE_LIBEAL_USE_HPET
106 
115 uint64_t
116 rte_get_hpet_cycles(void);
117 
124 uint64_t
125 rte_get_hpet_hz(void);
126 
140 int rte_eal_hpet_init(int make_default);
141 
142 #endif
143 
150 static inline uint64_t
152 {
153  switch(eal_timer_source) {
154  case EAL_TIMER_TSC:
155  return rte_get_tsc_cycles();
156  case EAL_TIMER_HPET:
157 #ifdef RTE_LIBEAL_USE_HPET
158  return rte_get_hpet_cycles();
159 #endif
160  default: rte_panic("Invalid timer source specified\n");
161  }
162 }
163 
170 static inline uint64_t
172 {
173  switch(eal_timer_source) {
174  case EAL_TIMER_TSC:
175  return rte_get_tsc_hz();
176  case EAL_TIMER_HPET:
177 #ifdef RTE_LIBEAL_USE_HPET
178  return rte_get_hpet_hz();
179 #endif
180  default: rte_panic("Invalid timer source specified\n");
181  }
182 }
183 
190 void
191 rte_delay_us(unsigned us);
192 
199 static inline void
200 rte_delay_ms(unsigned ms)
201 {
202  rte_delay_us(ms * 1000);
203 }
204 
205 #endif /* _RTE_CYCLES_H_ */