155 lines
4.7 KiB
C
155 lines
4.7 KiB
C
/* $NetBSD: sgmap_common.c,v 1.3 1997/09/02 13:18:46 thorpej Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1997 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
|
|
* NASA Ames Research Center.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
|
|
|
|
__KERNEL_RCSID(0, "$NetBSD: sgmap_common.c,v 1.3 1997/09/02 13:18:46 thorpej Exp $");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/proc.h>
|
|
|
|
#include <vm/vm.h>
|
|
|
|
#include <machine/bus.h>
|
|
|
|
#include <alpha/common/sgmapvar.h>
|
|
|
|
void
|
|
alpha_sgmap_init(t, sgmap, name, wbase, sgvabase, sgvasize, ptesize, ptva)
|
|
bus_dma_tag_t t;
|
|
struct alpha_sgmap *sgmap;
|
|
const char *name;
|
|
bus_addr_t wbase;
|
|
bus_addr_t sgvabase;
|
|
bus_size_t sgvasize;
|
|
size_t ptesize;
|
|
void *ptva;
|
|
{
|
|
bus_dma_segment_t seg;
|
|
size_t ptsize;
|
|
int rseg;
|
|
|
|
if (sgvasize & PGOFSET)
|
|
panic("alpha_sgmap_init: size botch");
|
|
|
|
sgmap->aps_wbase = wbase;
|
|
sgmap->aps_sgvabase = sgvabase;
|
|
sgmap->aps_sgvasize = sgvasize;
|
|
|
|
if (ptva != NULL) {
|
|
/*
|
|
* We already have a page table; this may be a system
|
|
* where the page table resides in bridge-resident SRAM.
|
|
*/
|
|
sgmap->aps_pt = ptva;
|
|
sgmap->aps_ptpa = 0;
|
|
} else {
|
|
/*
|
|
* Compute the page table size and allocate it. It must
|
|
* be aligned to its size.
|
|
*/
|
|
ptsize = (sgvasize / NBPG) * ptesize;
|
|
if (bus_dmamem_alloc(t, ptsize, ptsize, 0, &seg, 1, &rseg,
|
|
BUS_DMA_NOWAIT))
|
|
panic("alpha_sgmap_init: can't allocate page table");
|
|
if (bus_dmamem_map(t, &seg, rseg, ptsize,
|
|
(caddr_t *)&sgmap->aps_pt, BUS_DMA_NOWAIT))
|
|
panic("alpha_sgmap_init: can't map page table");
|
|
sgmap->aps_ptpa = seg.ds_addr;
|
|
}
|
|
|
|
/*
|
|
* Create the extent map used to manage the virtual address
|
|
* space.
|
|
*/
|
|
sgmap->aps_ex = extent_create((char *)name, sgvabase, sgvasize - 1,
|
|
M_DEVBUF, NULL, 0, EX_NOWAIT|EX_NOCOALESCE);
|
|
if (sgmap->aps_ex == NULL)
|
|
panic("alpha_sgmap_init: can't create extent map");
|
|
}
|
|
|
|
int
|
|
alpha_sgmap_alloc(map, len, sgmap, flags)
|
|
bus_dmamap_t map;
|
|
bus_size_t len;
|
|
struct alpha_sgmap *sgmap;
|
|
int flags;
|
|
{
|
|
struct alpha_sgmap_cookie *a = map->_dm_sgcookie;
|
|
int error;
|
|
|
|
#ifdef DIAGNOSTIC
|
|
if (a->apdc_flags & APDC_HAS_SGMAP)
|
|
panic("alpha_sgmap_alloc: already have sgva space");
|
|
#endif
|
|
|
|
a->apdc_len = round_page(len);
|
|
error = extent_alloc(sgmap->aps_ex, a->apdc_len, NBPG,
|
|
map->_dm_boundary, (flags & BUS_DMA_NOWAIT) ? EX_NOWAIT :
|
|
EX_WAITOK, &a->apdc_sgva);
|
|
|
|
if (error == 0)
|
|
a->apdc_flags |= APDC_HAS_SGMAP;
|
|
else
|
|
a->apdc_flags &= ~APDC_HAS_SGMAP;
|
|
|
|
return (error);
|
|
}
|
|
|
|
void
|
|
alpha_sgmap_free(sgmap, a)
|
|
struct alpha_sgmap *sgmap;
|
|
struct alpha_sgmap_cookie *a;
|
|
{
|
|
|
|
#ifdef DIAGNOSTIC
|
|
if ((a->apdc_flags & APDC_HAS_SGMAP) == 0)
|
|
panic("alpha_sgmap_free: no sgva space to free");
|
|
#endif
|
|
|
|
if (extent_free(sgmap->aps_ex, a->apdc_sgva,
|
|
a->apdc_len, EX_NOWAIT))
|
|
panic("alpha_sgmap_free");
|
|
|
|
a->apdc_flags &= ~APDC_HAS_SGMAP;
|
|
}
|