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 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #ifdef __cplusplus 33 extern "C" { 34 #endif 35 36 /* 37 * PMEM - Direct mapping physical memory pages to userland process 38 * 39 * Provide consolidation private functions used for directly (w/o occupying 40 * kernel virtual address space) allocating and exporting physical memory pages 41 * to userland. 42 */ 43 44 /* 45 * Flags to pass to pmem_alloc 46 */ 47 #define PMEM_SLEEP 0x1 48 #define PMEM_NOSLEEP 0x2 49 50 /* 51 * Called by driver devmap routine to pass physical memory mapping info to 52 * seg_dev framework, used only for physical memory allocated from 53 * devmap_pmem_alloc(). 54 */ 55 int devmap_pmem_setup(devmap_cookie_t, dev_info_t *dip, 56 struct devmap_callback_ctl *, devmap_pmem_cookie_t, offset_t, 57 size_t, uint_t, uint_t, ddi_device_acc_attr_t *); 58 59 /* 60 * Replace existing mapping using a new cookie, mainly gets called when doing 61 * fork(). Should be called in pertinent devmap_dup(9E). 62 */ 63 int devmap_pmem_remap(devmap_cookie_t, dev_info_t *dip, 64 devmap_pmem_cookie_t, offset_t, size_t, uint_t, uint_t, 65 ddi_device_acc_attr_t *); 66 67 /* 68 * Directly (i.e., without occupying kernel virtual address space) allocate 69 * 'npages' physical memory pages for exporting to user land. The allocated 70 * page_t pointer will be recorded in cookie. 71 */ 72 int devmap_pmem_alloc(size_t, uint_t, devmap_pmem_cookie_t *); 73 74 void devmap_pmem_free(devmap_pmem_cookie_t); 75 76 int devmap_pmem_getpfns(devmap_pmem_cookie_t, uint_t, pgcnt_t, pfn_t *); 77 78 void pmem_init(); 79 80 #ifdef __cplusplus 81 } 82 #endif 83 84 #endif /* _SYS_PMEM_H */ 85