source: mainline/arch/mips/src/mm/asid.c@ b4a4c5e3

/*
 * Copyright (C) 2005 HelenOS Project
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <arch.h>
#include <memstr.h>

/**< Array of threads that have currently some ASID assigned,
     NULL means no thread have ASID with number of that index assigned */
struct thread * asids[256];
int last_asid; /**< The number of last assigned ASID */
int asid_bitmap[32]; /**< Bitmap of ASIDs currently in TLB */


/** Cleanup asid_bitmap
 *
 */
void asid_bitmap_reset()
{
        memsetb(asid_bitmap, sizeof(asid_bitmap), 0);
}


/** Initialize manipulating with ASIDs
 *
 */
void init_asids()
{
        memsetb(asids, sizeof(asids), 0);
        asid_bitmap_reset();
        last_asid = 0;
}