/*      $NetBSD: cache.c,v 1.2 2007/10/30 16:38:54 tsutsui Exp $        */

/*
* Copyright 2001 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*      This product includes software developed for the NetBSD Project by
*      Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
*    or promote products derived from this software without specific prior
*    written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
* 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 <lib/libsa/stand.h>
#include <lib/libkern/libkern.h>

#include <mips/cpuregs.h>
#include <mips/cache_r4k.h>

#include "boot.h"

#define round_line(x)   (((x) + (CACHELINESIZE - 1)) & ~(CACHELINESIZE - 1))
#define trunc_line(x)   ((x) & ~(CACHELINESIZE - 1))

__asm(".set mips3");

void
pdcache_inv(uint32_t va, u_int size)
{
       uint32_t eva;

       eva = round_line(va + size);
       va  = trunc_line(va);

       while (va < eva) {
               cache_op_r4k_line(va, CACHE_R4K_D|CACHEOP_R4K_HIT_INV);
               va += CACHELINESIZE;
       }
}

void
pdcache_wb(uint32_t va, u_int size)
{
       uint32_t eva;

       eva = round_line(va + size);
       va  = trunc_line(va);

       while (va < eva) {
               cache_op_r4k_line(va, CACHE_R4K_D|CACHEOP_R4K_HIT_WB);
               va += CACHELINESIZE;
       }
}

void
pdcache_wbinv(uint32_t va, u_int size)
{
       uint32_t eva;

       eva = round_line(va + size);
       va  = trunc_line(va);

       while (va < eva) {
               cache_op_r4k_line(va, CACHE_R4K_D|CACHEOP_R4K_HIT_WB_INV);
               va += CACHELINESIZE;
       }
}