source: trunk/kernel/kern/core.h @ 28

Last change on this file since 28 was 19, checked in by max@…, 8 years ago

cosmetic, and a few typos
File size: 8.8 KB
Line 
1/*
2 * core.h - core descriptor and associated access functions définition
3 *
4 * Authors  Ghassan Almaless (2008,2009,2010,2011,2012)
5 *          Mohamed Lamine Karaoui (2015)
6 *          Alain Greiner (2016)
7 *
8 * Copyright (c) UPMC Sorbonne Universites
9 *
10 * This file is part of ALMOS-MKH.
11 *
12 * ALMOS-MKH is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; version 2.0 of the License.
15 *
16 * ALMOS-MKH is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
19 * General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with ALMOS-MKH; if not, write to the Free Software Foundation,
23 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
24 */
25
26#ifndef _CORE_H_
27#define _CORE_H_
28
29#include <kernel_config.h>
30#include <hal_types.h>
31#include <list.h>
32#include <rpc.h>
33#include <scheduler.h>
34
35/****  Forward declarations  ****/
36
37struct thread_s;
38struct chdev_s;
39
40
41/****************************************************************************************
42 * This structure defines the core descriptor.
43 * - It contains an embedded private scheduler.
44 * - It contains the three interrupt vectors, implemented as three arrays of pointers
45 *   on the source channel devices, for all IRQs allocated to the core.
46 ***************************************************************************************/
47
48typedef struct core_s
49{
50        lid_t               lid;            /*! core local index in cluster                */
51        gid_t               gid;            /*! core global identifier (hardware index)    */
52        uint64_t            cycles;         /*! total number of cycles (from hard reset)   */
53        uint32_t            time_stamp;     /*! previous time stamp (read from register)   */
54        uint32_t            ticks_nr;       /*! number of elapsed ticks                    */
55        uint32_t            ticks_period;   /*! number of cycles between two ticks         */
56        uint32_t            usage;          /*! cumulated busy_percent (idle / total)      */
57        uint32_t            spurious_irqs;  /*! for instrumentation...                     */
58        struct thread_s   * thread_rpc;     /*! pointer on current RPC thread descriptor   */
59        struct thread_s   * thread_idle;    /*! pointer on idle thread descriptor          */
60        struct thread_s   * fpu_owner;      /*! pointer on current FPU owner thread        */
61    uint32_t            rand_last;      /*! last computed random value                 */
62        uint32_t            rpc_threads;    /*! total number of RPC threads for this core  */
63        list_entry_t        rpc_free_list;  /*! root of the list of free RPC threads       */
64        rpc_fifo_t          rpc_fifo;       /*! embedded private RPC fifo (one per core)   */
65
66        scheduler_t         scheduler;      /*! embedded private scheduler                 */
67
68    struct chdev_s    * hwi_vector[CONFIG_MAX_HWIS_PER_ICU];     /*! on source device  */
69    struct chdev_s    * pti_vector[CONFIG_MAX_PTIS_PER_ICU];     /*! on source device  */
70    struct chdev_s    * wti_vector[CONFIG_MAX_WTIS_PER_ICU];     /*! on source device  */
71
72//      sysfs_entry_t       node;
73}
74core_t;
75
76/***************************************************************************************
77 * This macro returns a pointer on the calling core descriptor.
78 **************************************************************************************/
79
80#define CURRENT_CORE  (CURRENT_THREAD->core)
81
82/***************************************************************************************
83 * TODO this initialisation must be completed for the thread_idle field... [AG]
84 * This function initializes a core descriptor from information found in arch_info.
85 * It makes the association [gid] <=> [lid], as defined in arch_info, via the
86 * boot_info_t structure build by the bootloader in each cluster.
87 ***************************************************************************************
88 * @ core      : pointer on core descriptor to initialise.
89 * @ lid       : local core index
90 * @ gid       : global core identifier (hardware index)
91 **************************************************************************************/
92void core_init( core_t   * core,
93                lid_t      lid,
94                gid_t      gid );
95
96/***************************************************************************************
97 * This function returns a pseudo random number from the core descriptor
98 * private random generator.
99 ***************************************************************************************
100 * @ core       : pointer on core descriptor.
101 * @ returns the pseudo random value.
102 **************************************************************************************/
103inline uint32_t core_get_rand( core_t * core );
104
105/***************************************************************************************
106 * This function returns the current date (cycles) from both
107 * the hardware 32 bits cycles counter and the core descriptor cycles counter,
108 * taking into account the 32 bits hardware register overflow.
109 * The core descriptor time is updated.
110 ***************************************************************************************
111 * @ core       : pointer on core descriptor.
112 * @ returns the number of cycles.
113 **************************************************************************************/
114inline uint64_t core_get_cycles( core_t * core );
115
116/***************************************************************************************
117 * This function returns the current date (seconds & micro-seconds) from both
118 * the hardware 32 bits cycles counter and the core descriptor cycles counter,
119 * taking into account the 32 bits hardware register overflow.
120 * The core descriptor time is updated.
121 ***************************************************************************************
122 * @ core      : pointer on core descriptor.
123 * @ tm_s      : number of seconds.
124 * @ tm_us     : number of micro-seconds.
125 **************************************************************************************/
126void core_get_time( core_t   * core,
127                    uint32_t * tm_s,
128                    uint32_t * tm_us );
129
130/***************************************************************************************
131 * This function must be called at each TICK.
132 * It updates the  cycles and ticks counter in the calling core descriptor.
133 * It handles all pending alarms depending on the ticks counter value.
134 * It handles the scheduling, depending on the ticks counter value.
135 * It handles the global DQDT update, depending on the ticks counter vakue.
136 ***************************************************************************************
137 * @ core       : pointer on core descriptor.
138 **************************************************************************************/
139void core_clock( core_t * core );
140
141/***************************************************************************************
142 * This function updates the usage statistics for the calling core descriptor,
143 * based on the ratio between the idle_ticks and total_ticks.
144 ***************************************************************************************
145 * @ core       : pointer on core descriptor.
146 **************************************************************************************/
147void core_compute_stats( core_t * core );
148
149/***************************************************************************************
150 * This function reset the usage statistics.
151 ***************************************************************************************
152 * @ core       : pointer on core descriptor.
153 **************************************************************************************/
154void core_reset_stats( core_t * core );
155
156/***************************************************************************************
157 * This function set/reset a selected entry in one interrupt vector for a remote core.
158 * The written value is an extended pointer on the "source" device (or the XPTR_NULL
159 * value in case of reset). As it uses remote access, this function can be called by
160 * any thread in any cluster.
161 ***************************************************************************************
162 * @ core       : local pointer on the core descriptor.
163 * @ irq_type   : type of IRQ (HWI/WTI/PTI).
164 * @ irq_id     : index in the IRQ vector.
165 * @ chdev      : local pointer on the "source" chdev descriptor.
166 **************************************************************************************/
167void core_set_irq_vector_entry( core_t          * core,
168                                uint32_t          irq_type,
169                                uint32_t          irq_id,
170                                struct chdev_s  * chdev );
171
172
173#endif  /* _CORE_H_ */
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