1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #ifndef _SYS_PMEM_H 28 #define _SYS_PMEM_H 29 30 #ifdef __cplusplus 31 extern "C" { 32 #endif 33 34 /* 35 * PMEM - Direct mapping physical memory pages to userland process 36 * 37 * Provide consolidation private functions used for directly (w/o occupying 38 * kernel virtual address space) allocating and exporting physical memory pages 39 * to userland. 40 */ 41 42 /* 43 * Flags to pass to pmem_alloc 44 */ 45 #define PMEM_SLEEP 0x1 46 #define PMEM_NOSLEEP 0x2 47 48 /* 49 * Called by driver devmap routine to pass physical memory mapping info to 50 * seg_dev framework, used only for physical memory allocated from 51 * devmap_pmem_alloc(). 52 */ 53 int devmap_pmem_setup(devmap_cookie_t, dev_info_t *dip, 54 struct devmap_callback_ctl *, devmap_pmem_cookie_t, offset_t, 55 size_t, uint_t, uint_t, const ddi_device_acc_attr_t *); 56 57 /* 58 * Replace existing mapping using a new cookie, mainly gets called when doing 59 * fork(). Should be called in pertinent devmap_dup(9E). 60 */ 61 int devmap_pmem_remap(devmap_cookie_t, dev_info_t *dip, 62 devmap_pmem_cookie_t, offset_t, size_t, uint_t, uint_t, 63 const ddi_device_acc_attr_t *); 64 65 /* 66 * Directly (i.e., without occupying kernel virtual address space) allocate 67 * 'npages' physical memory pages for exporting to user land. The allocated 68 * page_t pointer will be recorded in cookie. 69 */ 70 int devmap_pmem_alloc(size_t, uint_t, devmap_pmem_cookie_t *); 71 72 void devmap_pmem_free(devmap_pmem_cookie_t); 73 74 int devmap_pmem_getpfns(devmap_pmem_cookie_t, uint_t, pgcnt_t, pfn_t *); 75 76 void pmem_init(); 77 78 #ifdef __cplusplus 79 } 80 #endif 81 82 #endif /* _SYS_PMEM_H */ 83