mirror of
https://git.rtems.org/rtems-libbsd/
synced 2025-05-14 05:19:26 +08:00
128 lines
4.0 KiB
C
128 lines
4.0 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
|
|
*
|
|
* Copyright (c) 2018, Matthew Macy <mmacy@freebsd.org>
|
|
* Copyright (c) 2018, embedded brains GmbH
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _SYS_EPOCH_H_
|
|
#define _SYS_EPOCH_H_
|
|
|
|
#include <sys/cdefs.h>
|
|
#ifdef _KERNEL
|
|
#include <sys/lock.h>
|
|
#include <sys/_mutex.h>
|
|
#include <sys/_sx.h>
|
|
#include <sys/pcpu.h>
|
|
#include <rtems/score/percpudata.h>
|
|
#endif
|
|
#include <rtems/thread.h>
|
|
#include <ck_epoch.h>
|
|
|
|
struct epoch_record;
|
|
|
|
struct epoch_tracker_mutex {
|
|
SLIST_ENTRY(epoch_tracker_mutex) etm_link; /* link to add to tracker */
|
|
rtems_mutex etm_mtx;
|
|
struct epoch_record *etm_record;
|
|
};
|
|
|
|
typedef struct epoch_tracker {
|
|
ck_epoch_section_t et_section;
|
|
TAILQ_ENTRY(epoch_tracker) et_link; /* link to add to record */
|
|
struct _Thread_Control *et_td; /* owner of this tracker */
|
|
SLIST_HEAD(, epoch_tracker_mutex) et_mtx;
|
|
} *epoch_tracker_t;
|
|
TAILQ_HEAD(epoch_tdlist, epoch_tracker);
|
|
|
|
typedef struct ck_epoch_entry *epoch_context_t;
|
|
#define epoch_context ck_epoch_entry
|
|
|
|
#ifdef _KERNEL
|
|
#define EPOCH_ALIGN CPU_CACHE_LINE_BYTES
|
|
|
|
struct epoch_record {
|
|
ck_epoch_record_t er_record;
|
|
struct epoch_tdlist er_tdlist;
|
|
uint32_t er_cpuid;
|
|
struct epoch_context er_drain_ctx;
|
|
struct epoch *er_parent;
|
|
} __aligned(EPOCH_ALIGN);
|
|
|
|
typedef struct epoch {
|
|
struct ck_epoch e_epoch __aligned(EPOCH_ALIGN);
|
|
uintptr_t e_pcpu_record_offset;
|
|
int e_flags;
|
|
SLIST_ENTRY(epoch) e_link; /* List of all epochs */
|
|
struct sx e_drain_sx;
|
|
struct mtx e_drain_mtx;
|
|
volatile int e_drain_count;
|
|
} *epoch_t;
|
|
|
|
extern struct epoch _bsd_global_epoch;
|
|
#define global_epoch &_bsd_global_epoch
|
|
|
|
extern struct epoch _bsd_global_epoch_preempt;
|
|
#define global_epoch_preempt &_bsd_global_epoch_preempt
|
|
|
|
#define EPOCH_PREEMPT 0x1
|
|
#define EPOCH_LOCKED 0x2
|
|
|
|
#define EPOCH_DEFINE(name, flags) \
|
|
struct epoch name; \
|
|
static PER_CPU_DATA_ITEM(struct epoch_record, name); \
|
|
static void \
|
|
epoch_##name##_sysinit(void) \
|
|
{ \
|
|
\
|
|
_bsd_epoch_init(&name, PER_CPU_DATA_OFFSET(name), flags); \
|
|
} \
|
|
SYSINIT(epoch_##name, SI_SUB_TUNABLES, SI_ORDER_THIRD, \
|
|
epoch_##name##_sysinit, NULL)
|
|
|
|
void _bsd_epoch_init(epoch_t epoch, uintptr_t pcpu_record_offset,
|
|
int flags);
|
|
|
|
void epoch_enter(epoch_t epoch);
|
|
void epoch_enter_preempt(epoch_t epoch, epoch_tracker_t et);
|
|
|
|
void epoch_exit(epoch_t epoch);
|
|
void epoch_exit_preempt(epoch_t epoch, epoch_tracker_t et);
|
|
|
|
void epoch_wait(epoch_t epoch);
|
|
void epoch_wait_preempt(epoch_t epoch);
|
|
|
|
void epoch_call(epoch_t epoch, epoch_context_t ctx,
|
|
void (*callback) (epoch_context_t));
|
|
void epoch_drain_callbacks(epoch_t epoch);
|
|
|
|
int _bsd_in_epoch(epoch_t epoch);
|
|
#define in_epoch(epoch) _bsd_in_epoch(epoch)
|
|
#define in_epoch_verbose(epoch, dump_onfail) _bsd_in_epoch(epoch)
|
|
|
|
#endif /* _KERNEL */
|
|
#endif /* _SYS_EPOCH_H_ */
|