minix/sys/sys/pcu.h
Lionel Sambuc 84d9c625bf Synchronize on NetBSD-CVS (2013/12/1 12:00:00 UTC)
- Fix for possible unset uid/gid in toproto
 - Fix for default mtree style
 - Update libelf
 - Importing libexecinfo
 - Resynchronize GCC, mpc, gmp, mpfr
 - build.sh: Replace params with show-params.
     This has been done as the make target has been renamed in the same
     way, while a new target named params has been added. This new
     target generates a file containing all the parameters, instead of
     printing it on the console.
 - Update test48 with new etc/services (Fix by Ben Gras <ben@minix3.org)
     get getservbyport() out of the inner loop

Change-Id: Ie6ad5226fa2621ff9f0dee8782ea48f9443d2091
2014-07-28 17:05:06 +02:00

97 lines
3.1 KiB
C

/* $NetBSD: pcu.h,v 1.11 2013/08/22 19:50:55 drochner Exp $ */
/*-
* Copyright (c) 2011 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Mindaugas Rasiukevicius.
*
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
#ifndef _SYS_PCU_H_
#define _SYS_PCU_H_
#if !defined(_KERNEL) && !defined(_KMEMUSER)
#error "not supposed to be exposed to userland"
#endif
#ifndef _KERNEL
#include <stdbool.h>
#endif
/*
* Default: no PCU for MD.
*/
#ifndef PCU_UNIT_COUNT
#define PCU_UNIT_COUNT 0
#endif
#if PCU_UNIT_COUNT > 0
/*
* pcu_state_save(lwp, flags)
* save the current CPU's state into the given LWP's MD storage.
*
* pcu_state_load(lwp, flags)
* load PCU state from the given LWP's MD storage to the current CPU.
* the 'flags' argument contains PCU_LOADED if it isn't the first time
* the LWP has used the PCU.
*
* pcu_state_release(lwp, flags)
* tell MD code detect the next use of the PCU on the LWP, and call
* pcu_load().
*/
typedef struct {
u_int pcu_id;
void (*pcu_state_save)(lwp_t *, u_int);
void (*pcu_state_load)(lwp_t *, u_int);
void (*pcu_state_release)(lwp_t *, u_int);
} pcu_ops_t;
#define PCU_USER 0x00 /* PCU state is for the user */
#define PCU_KERNEL 0x01 /* PCU state is for the kernel */
#define PCU_RELOAD 0x02 /* Load registers into the PCU, */
#define PCU_ENABLE 0x04 /* Enable the PCU, */
#define PCU_LOADED 0x08 /* LWP has used the PCU before, */
void pcu_switchpoint(lwp_t *);
void pcu_discard_all(lwp_t *);
void pcu_save_all(lwp_t *);
void pcu_load(const pcu_ops_t *);
void pcu_save(const pcu_ops_t *);
void pcu_save_all_on_cpu(void);
void pcu_discard(const pcu_ops_t *, bool);
void pcu_kernel_acquire(const pcu_ops_t *);
void pcu_kernel_release(const pcu_ops_t *);
bool pcu_used_p(const pcu_ops_t *);
#else
#define pcu_switchpoint(l)
#define pcu_discard_all(l)
#define pcu_save_all(l)
#endif
#endif