133 lines
3.7 KiB
C
133 lines
3.7 KiB
C
/* $NetBSD: iommu.c,v 1.12 2002/10/02 16:02:30 thorpej Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1996 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Jeremy Cooper.
|
|
*
|
|
* 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 by the NetBSD
|
|
* Foundation, Inc. and its contributors.
|
|
* 4. Neither the name of The NetBSD Foundation nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
|
* ``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 FOUNDATION OR CONTRIBUTORS
|
|
* 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.
|
|
*/
|
|
|
|
/*
|
|
* Set-up functions for the Sun3x DVMA I/O Mapper.
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/device.h>
|
|
#include <sys/conf.h>
|
|
#include <sys/buf.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/proc.h>
|
|
|
|
#include <machine/autoconf.h>
|
|
|
|
#include <sun3/sun3x/iommu.h>
|
|
#include <sun3/sun3x/obio.h>
|
|
|
|
#define IOMMU_SIZE (IOMMU_NENT * sizeof(iommu_pde_t))
|
|
|
|
static int iommu_match __P((struct device *, struct cfdata *, void *));
|
|
static void iommu_attach __P((struct device *, struct device *, void *));
|
|
|
|
CFATTACH_DECL(iommu, sizeof(struct device),
|
|
iommu_match, iommu_attach, NULL, NULL);
|
|
|
|
static iommu_pde_t *iommu_va;
|
|
|
|
static int
|
|
iommu_match(parent, cf, args)
|
|
struct device *parent;
|
|
struct cfdata *cf;
|
|
void *args;
|
|
{
|
|
/* This driver only supports one instance. */
|
|
if (iommu_va)
|
|
return (0);
|
|
|
|
return (1);
|
|
}
|
|
|
|
static void
|
|
iommu_attach(parent, self, args)
|
|
struct device *parent;
|
|
struct device *self;
|
|
void *args;
|
|
{
|
|
struct confargs *ca = args;
|
|
|
|
iommu_va = (iommu_pde_t *)
|
|
bus_mapin(ca->ca_bustype, ca->ca_paddr, IOMMU_SIZE);
|
|
|
|
printf("\n");
|
|
}
|
|
|
|
void
|
|
iommu_enter(sa, pa)
|
|
u_int32_t sa; /* slave address */
|
|
u_int32_t pa; /* phys. address */
|
|
{
|
|
int pn;
|
|
|
|
#ifdef DIAGNOSTIC
|
|
if (sa > (1<<24))
|
|
panic("iommu_enter: bad sa");
|
|
#endif
|
|
|
|
/* Convert the slave address into a page index. */
|
|
pn = IOMMU_BTOP(sa);
|
|
|
|
/* Mask the physical address to insure it is page aligned */
|
|
pa &= IOMMU_PDE_PA;
|
|
pa |= IOMMU_PDE_DT_VALID;
|
|
|
|
iommu_va[pn].addr.raw = pa;
|
|
}
|
|
|
|
void
|
|
iommu_remove(sa, len)
|
|
u_int32_t sa; /* slave address */
|
|
u_int32_t len;
|
|
{
|
|
int pn;
|
|
|
|
#ifdef DIAGNOSTIC
|
|
if (sa > (1<<24))
|
|
panic("iommu_enter: bad sa");
|
|
#endif
|
|
|
|
pn = IOMMU_BTOP(sa);
|
|
while (len > 0) {
|
|
iommu_va[pn++].addr.raw = IOMMU_PDE_DT_INVALID;
|
|
len -= IOMMU_PAGE_SIZE;
|
|
}
|
|
}
|