/*
 * 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/asm_linkage.h>
#include <sys/asm_misc.h>

#if defined(__amd64)

        /*
         * do a cpuid instruction, returning the eax/edx values
         *
         * uint32_t get_cpuid_edx(uint32_t *eax)
         */
        ENTRY_NP(get_cpuid_edx)
        pushq   %rbx
        movl    (%rdi), %eax
        cpuid
        movl    %eax, (%rdi)
        movl    %edx, %eax
        popq    %rbx
        ret
        SET_SIZE(get_cpuid_edx)

        /*
         * void outb(int port, uint8_t value)
         */
        ENTRY(outb)
        movw    %di, %dx
        movb    %sil, %al
        outb    (%dx)
        ret
        SET_SIZE(outb)

        /*
         * uint8_t inb(int port)
         */
        ENTRY(inb)
        xorl    %eax, %eax
        movw    %di, %dx
        inb     (%dx)
        ret
        SET_SIZE(inb)

        ENTRY(htonl)
        movl    %edi, %eax
        bswap   %eax
        ret
        SET_SIZE(htonl)

#elif defined(__i386)

        .code32

        /*
         * do a cpuid instruction, returning the eax/edx values
         *
         * uint32_t get_cpuid_edx(uint32_t *eax)
         */
        ENTRY_NP(get_cpuid_edx)
        movl    4(%esp), %ecx
        movl    (%ecx), %eax
        pushl   %ebx
        cpuid
        popl    %ebx
        movl    4(%esp), %ecx
        movl    %eax, (%ecx)
        movl    %edx, %eax
        ret
        SET_SIZE(get_cpuid_edx)

        /*
         * void outb(int port, uint8_t value)
         */
        ENTRY_NP(outb)
        movl    4(%esp), %edx
        movl    8(%esp), %eax
        outb    (%dx)
        ret
        SET_SIZE(outb)

        /*
         * uint8_t inb(int port)
         */
        ENTRY_NP(inb)
        movl    4(%esp), %edx
        inb     (%dx)
        andl    $0xff, %eax
        ret
        SET_SIZE(inb)

        ENTRY(htonl)
        movl    4(%esp), %eax
        bswap   %eax
        ret
        SET_SIZE(htonl)

#endif  /* __i386 */