1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24*0Sstevel@tonic-gate * Use is subject to license terms. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate #ifndef _VM_HMENT_H 28*0Sstevel@tonic-gate #define _VM_HMENT_H 29*0Sstevel@tonic-gate 30*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 31*0Sstevel@tonic-gate 32*0Sstevel@tonic-gate #ifdef __cplusplus 33*0Sstevel@tonic-gate extern "C" { 34*0Sstevel@tonic-gate #endif 35*0Sstevel@tonic-gate 36*0Sstevel@tonic-gate 37*0Sstevel@tonic-gate struct hment; 38*0Sstevel@tonic-gate typedef struct hment hment_t; 39*0Sstevel@tonic-gate 40*0Sstevel@tonic-gate #if defined(_KERNEL) 41*0Sstevel@tonic-gate 42*0Sstevel@tonic-gate /* 43*0Sstevel@tonic-gate * Remove a page mapping, finds the matching mapping and unlinks it from 44*0Sstevel@tonic-gate * the page_t. If it returns a non-NULL pointer, the pointer must be 45*0Sstevel@tonic-gate * freed via hment_free() after doing x86_hm_exit(). 46*0Sstevel@tonic-gate */ 47*0Sstevel@tonic-gate extern hment_t *hment_remove(page_t *, htable_t *ht, uint_t entry); 48*0Sstevel@tonic-gate extern void hment_free(hment_t *); 49*0Sstevel@tonic-gate 50*0Sstevel@tonic-gate /* 51*0Sstevel@tonic-gate * Iterator to walk through all mappings of a page. 52*0Sstevel@tonic-gate */ 53*0Sstevel@tonic-gate extern hment_t *hment_walk(page_t *, htable_t **, uint_t *, hment_t *); 54*0Sstevel@tonic-gate 55*0Sstevel@tonic-gate /* 56*0Sstevel@tonic-gate * Prepare a page for a new mapping 57*0Sstevel@tonic-gate */ 58*0Sstevel@tonic-gate extern hment_t *hment_prepare(htable_t *ht, uint_t entry, page_t *); 59*0Sstevel@tonic-gate 60*0Sstevel@tonic-gate /* 61*0Sstevel@tonic-gate * Add a mapping to a page's mapping list 62*0Sstevel@tonic-gate */ 63*0Sstevel@tonic-gate extern void hment_assign(htable_t *ht, uint_t entry, page_t *, hment_t *); 64*0Sstevel@tonic-gate 65*0Sstevel@tonic-gate /* 66*0Sstevel@tonic-gate * initialize hment data structures 67*0Sstevel@tonic-gate */ 68*0Sstevel@tonic-gate extern void hment_init(void); 69*0Sstevel@tonic-gate 70*0Sstevel@tonic-gate /* 71*0Sstevel@tonic-gate * lock/unlock a page_t's mapping list/pte entry 72*0Sstevel@tonic-gate */ 73*0Sstevel@tonic-gate extern void x86_hm_enter(page_t *); 74*0Sstevel@tonic-gate extern void x86_hm_exit(page_t *); 75*0Sstevel@tonic-gate extern int x86_hm_held(page_t *pp); 76*0Sstevel@tonic-gate 77*0Sstevel@tonic-gate /* 78*0Sstevel@tonic-gate * Called to allocate additional hments for reserve. 79*0Sstevel@tonic-gate * 80*0Sstevel@tonic-gate * The hment_reserve_count is exported for use by htable_hment_steal() 81*0Sstevel@tonic-gate */ 82*0Sstevel@tonic-gate extern void hment_reserve(uint_t); 83*0Sstevel@tonic-gate extern uint_t hment_reserve_count; 84*0Sstevel@tonic-gate 85*0Sstevel@tonic-gate /* 86*0Sstevel@tonic-gate * Used to readjust the hment reserve after the reserve list has been used. 87*0Sstevel@tonic-gate * Also called after boot to release left over boot reserves. 88*0Sstevel@tonic-gate */ 89*0Sstevel@tonic-gate extern void hment_adjust_reserve(void); 90*0Sstevel@tonic-gate 91*0Sstevel@tonic-gate /* 92*0Sstevel@tonic-gate * Return the number of mappings of a page_t 93*0Sstevel@tonic-gate */ 94*0Sstevel@tonic-gate extern uint_t hment_mapcnt(page_t *); 95*0Sstevel@tonic-gate 96*0Sstevel@tonic-gate #endif /* _KERNEL */ 97*0Sstevel@tonic-gate 98*0Sstevel@tonic-gate 99*0Sstevel@tonic-gate #ifdef __cplusplus 100*0Sstevel@tonic-gate } 101*0Sstevel@tonic-gate #endif 102*0Sstevel@tonic-gate 103*0Sstevel@tonic-gate #endif /* _VM_HMENT_H */ 104