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/* $OpenBSD: bus_space.c,v 1.3 2001/07/05 10:00:36 art Exp $ */
/* $NetBSD: bus_space.c,v 1.4 2001/06/15 15:50:05 nonaka Exp $ */
/*-
* Copyright (c) 1996, 1997, 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Charles M. Hannum and 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/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/extent.h>
#include <sys/mbuf.h>
#include <machine/bus.h>
static int prep_memio_map(bus_space_tag_t, bus_addr_t, bus_size_t, int,
bus_space_handle_t *);
static void prep_memio_unmap(bus_space_tag_t, bus_space_handle_t, bus_size_t);
static int prep_memio_alloc(bus_space_tag_t, bus_addr_t, bus_addr_t,
bus_size_t, bus_size_t, bus_size_t, int, bus_addr_t *,
bus_space_handle_t *);
static void prep_memio_free(bus_space_tag_t, bus_space_handle_t, bus_size_t);
const struct ppc_bus_space prep_io_space_tag = {
PREP_BUS_SPACE_IO, 0x80000000, 0x80000000, 0x3f800000,
prep_memio_map, prep_memio_unmap, prep_memio_alloc, prep_memio_free
};
const struct ppc_bus_space prep_isa_io_space_tag = {
PREP_BUS_SPACE_IO, 0x80000000, 0x80000000, 0x00010000,
prep_memio_map, prep_memio_unmap, prep_memio_alloc, prep_memio_free
};
const struct ppc_bus_space prep_mem_space_tag = {
PREP_BUS_SPACE_MEM, 0xC0000000, 0xC0000000, 0x3f000000,
prep_memio_map, prep_memio_unmap, prep_memio_alloc, prep_memio_free
};
const struct ppc_bus_space prep_isa_mem_space_tag = {
PREP_BUS_SPACE_MEM, 0xC0000000, 0xC0000000, 0x01000000,
prep_memio_map, prep_memio_unmap, prep_memio_alloc, prep_memio_free
};
static long ioport_ex_storage[EXTENT_FIXED_STORAGE_SIZE(8) / sizeof(long)];
static long iomem_ex_storage[EXTENT_FIXED_STORAGE_SIZE(8) / sizeof(long)];
struct extent *ioport_ex;
struct extent *iomem_ex;
static int ioport_malloc_safe;
void
prep_bus_space_init()
{
int error;
ioport_ex = extent_create("ioport", 0, 0x3f7fffff, M_DEVBUF,
(caddr_t)ioport_ex_storage, sizeof(ioport_ex_storage),
EX_NOCOALESCE|EX_NOWAIT);
error = extent_alloc_region(ioport_ex, 0x10000, 0x7F0000, EX_NOWAIT);
if (error)
panic("prep_bus_space_init: can't block out reserved I/O space 0x10000-0x7fffff: error=%d\n", error);
iomem_ex = extent_create("iomem", 0, 0x3effffff, M_DEVBUF,
(caddr_t)iomem_ex_storage, sizeof(iomem_ex_storage),
EX_NOCOALESCE|EX_NOWAIT);
}
void
prep_bus_space_mallocok()
{
ioport_malloc_safe = 1;
}
static int
prep_memio_map(t, bpa, size, flags, bshp)
bus_space_tag_t t;
bus_addr_t bpa;
bus_size_t size;
int flags;
bus_space_handle_t *bshp;
{
int error;
struct extent *ex;
if (bpa + size > t->pbs_limit)
return (EINVAL);
/*
* Pick the appropriate extent map.
*/
if (t->pbs_type == PREP_BUS_SPACE_IO) {
if (flags & BUS_SPACE_MAP_LINEAR)
return (EOPNOTSUPP);
ex = ioport_ex;
} else if (t->pbs_type == PREP_BUS_SPACE_MEM) {
ex = iomem_ex;
} else
panic("prep_memio_map: bad bus space tag");
/*
* Before we go any further, let's make sure that this
* region is available.
*/
error = extent_alloc_region(ex, bpa, size,
EX_NOWAIT | (ioport_malloc_safe ? EX_MALLOCOK : 0));
if (error)
return (error);
*bshp = t->pbs_base + bpa;
return (0);
}
static void
prep_memio_unmap(t, bsh, size)
bus_space_tag_t t;
bus_space_handle_t bsh;
bus_size_t size;
{
struct extent *ex;
bus_addr_t bpa;
/*
* Find the correct extent and bus physical address.
*/
if (t->pbs_type == PREP_BUS_SPACE_IO)
ex = ioport_ex;
else if (t->pbs_type == PREP_BUS_SPACE_MEM)
ex = iomem_ex;
else
panic("prep_memio_unmap: bad bus space tag");
bpa = bsh - t->pbs_base;
if (extent_free(ex, bpa, size,
EX_NOWAIT | (ioport_malloc_safe ? EX_MALLOCOK : 0))) {
printf("prep_memio_unmap: %s 0x%lx, size 0x%lx\n",
(t->pbs_type == PREP_BUS_SPACE_IO) ? "port" : "mem",
(unsigned long)bpa, (unsigned long)size);
printf("prep_memio_unmap: can't free region\n");
}
}
static int
prep_memio_alloc(t, rstart, rend, size, alignment, boundary, flags,
bpap, bshp)
bus_space_tag_t t;
bus_addr_t rstart, rend;
bus_size_t size, alignment, boundary;
int flags;
bus_addr_t *bpap;
bus_space_handle_t *bshp;
{
struct extent *ex;
u_long bpa;
int error;
if (rstart + size > t->pbs_limit)
return (EINVAL);
if (t->pbs_type == PREP_BUS_SPACE_IO) {
if (flags & BUS_SPACE_MAP_LINEAR)
return (EOPNOTSUPP);
ex = ioport_ex;
} else if (t->pbs_type == PREP_BUS_SPACE_MEM) {
ex = iomem_ex;
} else
panic("prep_memio_alloc: bad bus space tag");
if (rstart < ex->ex_start || rend > ex->ex_end)
panic("prep_memio_alloc: bad region start/end");
error = extent_alloc_subregion(ex, rstart, rend, size, alignment, 0,
boundary,
EX_FAST | EX_NOWAIT | (ioport_malloc_safe ? EX_MALLOCOK : 0),
&bpa);
if (error)
return (error);
*bpap = bpa;
*bshp = t->pbs_base + bpa;
return (0);
}
static void
prep_memio_free(t, bsh, size)
bus_space_tag_t t;
bus_space_handle_t bsh;
bus_size_t size;
{
/* prep_memio_unmap() does all that we need to do. */
prep_memio_unmap(t, bsh, size);
}
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