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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <sys/types.h>
#include <sys/systm.h>
#include <vm/page.h>
#include <sys/errno.h>
/*
* Return supported page sizes.
*/
int
getpagesizes(int legacy, size_t *buf, int nelem)
{
int i, pagesizes = page_num_user_pagesizes(legacy);
size_t *pgsza;
if (nelem < 0) {
return (set_errno(EINVAL));
}
if (nelem == 0 && buf != NULL) {
return (set_errno(EINVAL));
}
if (nelem == 0 && buf == NULL) {
return (pagesizes);
}
if (buf == NULL) {
return (set_errno(EINVAL));
}
if (nelem > pagesizes) {
nelem = pagesizes;
}
pgsza = kmem_alloc(sizeof (*pgsza) * nelem, KM_SLEEP);
for (i = 0; i < nelem; i++) {
pgsza[i] = page_get_user_pagesize(i);
}
if (copyout(pgsza, buf, nelem * sizeof (*pgsza)) != 0) {
kmem_free(pgsza, sizeof (*pgsza) * nelem);
return (set_errno(EFAULT));
}
kmem_free(pgsza, sizeof (*pgsza) * nelem);
return (nelem);
}
#if defined(_SYSCALL32_IMPL)
/*
* Some future platforms will support page sizes larger than
* a 32-bit address space.
*/
int
getpagesizes32(int legacy, size32_t *buf, int nelem)
{
int i, pagesizes = page_num_user_pagesizes(legacy);
size32_t *pgsza32;
size_t pgsz;
int rc;
if (nelem < 0) {
return (set_errno(EINVAL));
}
if (nelem == 0 && buf != NULL) {
return (set_errno(EINVAL));
}
pgsza32 = kmem_alloc(sizeof (*pgsza32) * pagesizes, KM_SLEEP);
for (i = 0; i < pagesizes; i++) {
pgsz = page_get_user_pagesize(i);
pgsza32[i] = (size32_t)pgsz;
if (pgsz > (size32_t)-1) {
pagesizes = i - 1;
break;
}
}
ASSERT(pagesizes > 0);
ASSERT(page_get_user_pagesize(pagesizes - 1) <= (size32_t)-1);
if (nelem > pagesizes) {
nelem = pagesizes;
}
if (nelem == 0 && buf == NULL) {
rc = pagesizes;
goto done;
}
if (buf == NULL) {
rc = set_errno(EINVAL);
goto done;
}
if (copyout(pgsza32, buf, nelem * sizeof (*pgsza32)) != 0) {
rc = set_errno(EFAULT);
goto done;
}
rc = nelem;
done:
kmem_free(pgsza32, sizeof (*pgsza32) *
page_num_user_pagesizes(legacy));
return (rc);
}
#endif
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