1 /* $NetBSD: pcu.h,v 1.8 2011/06/06 22:04:34 matt Exp $ */ 2 3 /*- 4 * Copyright (c) 2011 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Mindaugas Rasiukevicius. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef _SYS_PCU_H_ 33 #define _SYS_PCU_H_ 34 35 #if !defined(_KERNEL) && !defined(_KMEMUSER) 36 #error "not supposed to be exposed to userland" 37 #endif 38 39 #ifndef _KERNEL 40 #include <stdbool.h> 41 #endif 42 43 /* 44 * Default: no PCU for MD. 45 */ 46 #ifndef PCU_UNIT_COUNT 47 #define PCU_UNIT_COUNT 0 48 #endif 49 50 #if PCU_UNIT_COUNT > 0 51 52 typedef struct { 53 u_int pcu_id; 54 void (*pcu_state_save)(lwp_t *); 55 void (*pcu_state_load)(lwp_t *, bool); 56 void (*pcu_state_release)(lwp_t *); 57 } pcu_ops_t; 58 59 void pcu_switchpoint(lwp_t *); 60 void pcu_discard_all(lwp_t *); 61 void pcu_save_all(lwp_t *); 62 63 void pcu_load(const pcu_ops_t *); 64 void pcu_save(const pcu_ops_t *); 65 void pcu_discard(const pcu_ops_t *); 66 bool pcu_used_p(const pcu_ops_t *); 67 68 #else 69 #define pcu_switchpoint(l) 70 #define pcu_discard_all(l) 71 #define pcu_save_all(l) 72 #endif 73 74 #endif 75