1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  *
  25  * Copyright 2017 RackTop Systems.
  26  */
  27 
  28 #ifndef _SYS_CYCLIC_H
  29 #define _SYS_CYCLIC_H
  30 
  31 #ifdef  __cplusplus
  32 extern "C" {
  33 #endif
  34 
  35 #ifndef _ASM
  36 #include <sys/time.h>
  37 #endif /* !_ASM */
  38 
  39 #define CY_LOW_LEVEL            0
  40 #define CY_LOCK_LEVEL           1
  41 #define CY_HIGH_LEVEL           2
  42 #define CY_SOFT_LEVELS          2
  43 #define CY_LEVELS               3
  44 
  45 #ifndef _ASM
  46 
  47 typedef uintptr_t cyclic_id_t;
  48 typedef int cyc_index_t;
  49 typedef int cyc_cookie_t;
  50 typedef uint16_t cyc_level_t;
  51 typedef void (*cyc_func_t)(void *);
  52 typedef void *cyb_arg_t;
  53 
  54 #define CYCLIC_NONE             ((cyclic_id_t)0)
  55 
  56 typedef struct cyc_handler {
  57         cyc_func_t cyh_func;
  58         void *cyh_arg;
  59         cyc_level_t cyh_level;
  60 } cyc_handler_t;
  61 
  62 typedef struct cyc_time {
  63         hrtime_t cyt_when;
  64         hrtime_t cyt_interval;
  65 } cyc_time_t;
  66 
  67 #define CY_INFINITY     INT64_MAX
  68 
  69 #if defined(_KERNEL) || defined(_FAKE_KERNEL)
  70 
  71 extern cyclic_id_t cyclic_add(cyc_handler_t *, cyc_time_t *);
  72 extern void cyclic_remove(cyclic_id_t);
  73 extern int cyclic_reprogram(cyclic_id_t, hrtime_t);
  74 extern hrtime_t cyclic_getres();
  75 
  76 extern void cyclic_suspend();
  77 extern void cyclic_resume();
  78 
  79 #endif /* _KERNEL || _FAKE_KERNEL */
  80 
  81 #endif /* !_ASM */
  82 
  83 #ifdef  __cplusplus
  84 }
  85 #endif
  86 
  87 #endif /* _SYS_CYCLIC_H */