1*7c478bd9Sstevel@tonic-gate /* 2*7c478bd9Sstevel@tonic-gate * CDDL HEADER START 3*7c478bd9Sstevel@tonic-gate * 4*7c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*7c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*7c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*7c478bd9Sstevel@tonic-gate * with the License. 8*7c478bd9Sstevel@tonic-gate * 9*7c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*7c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*7c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 12*7c478bd9Sstevel@tonic-gate * and limitations under the License. 13*7c478bd9Sstevel@tonic-gate * 14*7c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*7c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*7c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*7c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*7c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*7c478bd9Sstevel@tonic-gate * 20*7c478bd9Sstevel@tonic-gate * CDDL HEADER END 21*7c478bd9Sstevel@tonic-gate */ 22*7c478bd9Sstevel@tonic-gate /* 23*7c478bd9Sstevel@tonic-gate * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24*7c478bd9Sstevel@tonic-gate * Use is subject to license terms. 25*7c478bd9Sstevel@tonic-gate */ 26*7c478bd9Sstevel@tonic-gate 27*7c478bd9Sstevel@tonic-gate #ifndef _VM_HMENT_H 28*7c478bd9Sstevel@tonic-gate #define _VM_HMENT_H 29*7c478bd9Sstevel@tonic-gate 30*7c478bd9Sstevel@tonic-gate #ifdef __cplusplus 31*7c478bd9Sstevel@tonic-gate extern "C" { 32*7c478bd9Sstevel@tonic-gate #endif 33*7c478bd9Sstevel@tonic-gate 34*7c478bd9Sstevel@tonic-gate 35*7c478bd9Sstevel@tonic-gate struct hment; 36*7c478bd9Sstevel@tonic-gate typedef struct hment hment_t; 37*7c478bd9Sstevel@tonic-gate 38*7c478bd9Sstevel@tonic-gate #if defined(_KERNEL) 39*7c478bd9Sstevel@tonic-gate 40*7c478bd9Sstevel@tonic-gate /* 41*7c478bd9Sstevel@tonic-gate * Remove a page mapping, finds the matching mapping and unlinks it from 42*7c478bd9Sstevel@tonic-gate * the page_t. If it returns a non-NULL pointer, the pointer must be 43*7c478bd9Sstevel@tonic-gate * freed via hment_free() after doing x86_hm_exit(). 44*7c478bd9Sstevel@tonic-gate */ 45*7c478bd9Sstevel@tonic-gate extern hment_t *hment_remove(page_t *, htable_t *ht, uint_t entry); 46*7c478bd9Sstevel@tonic-gate extern void hment_free(hment_t *); 47*7c478bd9Sstevel@tonic-gate 48*7c478bd9Sstevel@tonic-gate /* 49*7c478bd9Sstevel@tonic-gate * Iterator to walk through all mappings of a page. 50*7c478bd9Sstevel@tonic-gate */ 51*7c478bd9Sstevel@tonic-gate extern hment_t *hment_walk(page_t *, htable_t **, uint_t *, hment_t *); 52*7c478bd9Sstevel@tonic-gate 53*7c478bd9Sstevel@tonic-gate /* 54*7c478bd9Sstevel@tonic-gate * Prepare a page for a new mapping 55*7c478bd9Sstevel@tonic-gate */ 56*7c478bd9Sstevel@tonic-gate extern hment_t *hment_prepare(htable_t *ht, uint_t entry, page_t *); 57*7c478bd9Sstevel@tonic-gate 58*7c478bd9Sstevel@tonic-gate /* 59*7c478bd9Sstevel@tonic-gate * Add a mapping to a page's mapping list 60*7c478bd9Sstevel@tonic-gate */ 61*7c478bd9Sstevel@tonic-gate extern void hment_assign(htable_t *ht, uint_t entry, page_t *, hment_t *); 62*7c478bd9Sstevel@tonic-gate 63*7c478bd9Sstevel@tonic-gate /* 64*7c478bd9Sstevel@tonic-gate * initialize hment data structures 65*7c478bd9Sstevel@tonic-gate */ 66*7c478bd9Sstevel@tonic-gate extern void hment_init(void); 67*7c478bd9Sstevel@tonic-gate 68*7c478bd9Sstevel@tonic-gate /* 69*7c478bd9Sstevel@tonic-gate * lock/unlock a page_t's mapping list/pte entry 70*7c478bd9Sstevel@tonic-gate */ 71*7c478bd9Sstevel@tonic-gate extern void x86_hm_enter(page_t *); 72*7c478bd9Sstevel@tonic-gate extern void x86_hm_exit(page_t *); 73*7c478bd9Sstevel@tonic-gate extern int x86_hm_held(page_t *pp); 74*7c478bd9Sstevel@tonic-gate 75*7c478bd9Sstevel@tonic-gate /* 76*7c478bd9Sstevel@tonic-gate * Called to allocate additional hments for reserve. 77*7c478bd9Sstevel@tonic-gate * 78*7c478bd9Sstevel@tonic-gate * The hment_reserve_count is exported for use by htable_hment_steal() 79*7c478bd9Sstevel@tonic-gate */ 80*7c478bd9Sstevel@tonic-gate extern void hment_reserve(uint_t); 81*7c478bd9Sstevel@tonic-gate extern uint_t hment_reserve_count; 82*7c478bd9Sstevel@tonic-gate 83*7c478bd9Sstevel@tonic-gate /* 84*7c478bd9Sstevel@tonic-gate * Used to readjust the hment reserve after the reserve list has been used. 85*7c478bd9Sstevel@tonic-gate * Also called after boot to release left over boot reserves. 86*7c478bd9Sstevel@tonic-gate */ 87*7c478bd9Sstevel@tonic-gate extern void hment_adjust_reserve(void); 88*7c478bd9Sstevel@tonic-gate 89*7c478bd9Sstevel@tonic-gate /* 90*7c478bd9Sstevel@tonic-gate * Return the number of mappings of a page_t 91*7c478bd9Sstevel@tonic-gate */ 92*7c478bd9Sstevel@tonic-gate extern uint_t hment_mapcnt(page_t *); 93*7c478bd9Sstevel@tonic-gate 94*7c478bd9Sstevel@tonic-gate #endif /* _KERNEL */ 95*7c478bd9Sstevel@tonic-gate 96*7c478bd9Sstevel@tonic-gate 97*7c478bd9Sstevel@tonic-gate #ifdef __cplusplus 98*7c478bd9Sstevel@tonic-gate } 99*7c478bd9Sstevel@tonic-gate #endif 100*7c478bd9Sstevel@tonic-gate 101*7c478bd9Sstevel@tonic-gate #endif /* _VM_HMENT_H */ 102