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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #include <sys/types.h> 27 #include <sys/systm.h> 28 #include <vm/page.h> 29 #include <sys/errno.h> 30 31 /* 32 * Return supported page sizes. 33 */ 34 int 35 getpagesizes(int legacy, size_t *buf, int nelem) 36 { 37 int i, pagesizes = page_num_user_pagesizes(legacy); 38 size_t *pgsza; 39 40 if (nelem < 0) { 41 return (set_errno(EINVAL)); 42 } 43 if (nelem == 0 && buf != NULL) { 44 return (set_errno(EINVAL)); 45 } 46 if (nelem == 0 && buf == NULL) { 47 return (pagesizes); 48 } 49 if (buf == NULL) { 50 return (set_errno(EINVAL)); 51 } 52 if (nelem > pagesizes) { 53 nelem = pagesizes; 54 } 55 pgsza = kmem_alloc(sizeof (*pgsza) * nelem, KM_SLEEP); 56 for (i = 0; i < nelem; i++) { 57 pgsza[i] = page_get_user_pagesize(i); 58 } 59 if (copyout(pgsza, buf, nelem * sizeof (*pgsza)) != 0) { 60 kmem_free(pgsza, sizeof (*pgsza) * nelem); 61 return (set_errno(EFAULT)); 62 } 63 kmem_free(pgsza, sizeof (*pgsza) * nelem); 64 return (nelem); 65 } 66 67 #if defined(_SYSCALL32_IMPL) 68 69 /* 70 * Some future platforms will support page sizes larger than 71 * a 32-bit address space. 72 */ 73 int 74 getpagesizes32(int legacy, size32_t *buf, int nelem) 75 { 76 int i, pagesizes = page_num_user_pagesizes(legacy); 77 size32_t *pgsza32; 78 size_t pgsz; 79 int rc; 80 81 if (nelem < 0) { 82 return (set_errno(EINVAL)); 83 } 84 if (nelem == 0 && buf != NULL) { 85 return (set_errno(EINVAL)); 86 } 87 88 pgsza32 = kmem_alloc(sizeof (*pgsza32) * pagesizes, KM_SLEEP); 89 for (i = 0; i < pagesizes; i++) { 90 pgsz = page_get_user_pagesize(i); 91 pgsza32[i] = (size32_t)pgsz; 92 if (pgsz > (size32_t)-1) { 93 pagesizes = i - 1; 94 break; 95 } 96 } 97 ASSERT(pagesizes > 0); 98 ASSERT(page_get_user_pagesize(pagesizes - 1) <= (size32_t)-1); 99 if (nelem > pagesizes) { 100 nelem = pagesizes; 101 } 102 if (nelem == 0 && buf == NULL) { 103 rc = pagesizes; 104 goto done; 105 } 106 if (buf == NULL) { 107 rc = set_errno(EINVAL); 108 goto done; 109 } 110 if (copyout(pgsza32, buf, nelem * sizeof (*pgsza32)) != 0) { 111 rc = set_errno(EFAULT); 112 goto done; 113 } 114 rc = nelem; 115 done: 116 kmem_free(pgsza32, sizeof (*pgsza32) * 117 page_num_user_pagesizes(legacy)); 118 return (rc); 119 } 120 #endif 121