xref: /src/sys/arch/cobalt/stand/boot/cache.c

/*	$NetBSD: cache.c,v 1.2.8.2 2007/11/06 23:15:44 matt 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;
	}
}