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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 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* Copyright (c) 2012, Joyent, Inc. All rights reserved.
* Copyright 2022 Oxide Computer Company
*/
#pragma weak _getisax = getisax
#include "lint.h"
#include <sys/types.h>
#include <sys/auxv.h>
extern long ___getauxval(int type);
/*
* Return the 'hwcap' vector of bits in the AT_SUN_HWCAP and AT_SUN_HWCAP2 aux
* vector entries. Therefore there are two words of bits here.
*
* As a convenience, the routine returns the maximum number of array alements
* that may contain non-zero values.
*/
uint_t
getisax(uint32_t *array, uint_t n)
{
int i;
static uint32_t auxv_hwcap;
static uint32_t auxv_hwcap_2;
static uint32_t auxv_hwcap_3;
if (auxv_hwcap == 0) {
auxv_hwcap = (uint32_t)___getauxval(AT_SUN_HWCAP);
auxv_hwcap_2 = (uint32_t)___getauxval(AT_SUN_HWCAP2);
auxv_hwcap_3 = (uint32_t)___getauxval(AT_SUN_HWCAP3);
}
if (n > 0) {
if (n >= 1)
array[0] = auxv_hwcap;
if (n >= 2)
array[1] = auxv_hwcap_2;
if (n >= 3)
array[2] = auxv_hwcap_3;
for (i = 3; i < n; i++)
array[i] = 0;
}
if (auxv_hwcap == 0) {
return (0);
}
return (n >= 3 ? 3 : n);
}
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