NetBSD-5.0.2/sys/arch/ews4800mips/ews4800mips/bus_space.c
/* $NetBSD: bus_space.c,v 1.4 2008/04/28 20:23:18 martin Exp $ */
/*-
* Copyright (c) 2001, 2004, 2005 The NetBSD Foundation, Inc.
* All rights reserved.
*
* 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.
*
* 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>
__KERNEL_RCSID(0, "$NetBSD: bus_space.c,v 1.4 2008/04/28 20:23:18 martin Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/extent.h>
#define _EWS4800MIPS_BUS_SPACE_PRIVATE
#include <machine/bus.h>
#include <machine/sbdvar.h>
#ifdef BUS_SPACE_DEBUG
int bus_space_debug = 0;
#define DPRINTF(fmt, args...) \
if (bus_space_debug) \
printf("%s: " fmt, __func__ , ##args)
#define DPRINTFN(n, arg) \
if (bus_space_debug > (n)) \
printf("%s: " fmt, __func__ , ##args)
#else
#define DPRINTF(arg...) ((void)0)
#define DPRINTFN(n, arg...) ((void)0)
#endif
#define VADDR(h, o) (h + o)
_BUS_SPACE_READ(_default, 1, 8)
_BUS_SPACE_READ(_default, 2, 16)
_BUS_SPACE_READ(_default, 4, 32)
_BUS_SPACE_READ(_default, 8, 64)
_BUS_SPACE_READ_MULTI(_default, 1, 8)
_BUS_SPACE_READ_MULTI(_default, 2, 16)
_BUS_SPACE_READ_MULTI(_default, 4, 32)
_BUS_SPACE_READ_MULTI(_default, 8, 64)
_BUS_SPACE_READ_REGION(_default, 1, 8)
_BUS_SPACE_READ_REGION(_default, 2, 16)
_BUS_SPACE_READ_REGION(_default, 4, 32)
_BUS_SPACE_READ_REGION(_default, 8, 64)
_BUS_SPACE_WRITE(_default, 1, 8)
_BUS_SPACE_WRITE(_default, 2, 16)
_BUS_SPACE_WRITE(_default, 4, 32)
_BUS_SPACE_WRITE(_default, 8, 64)
_BUS_SPACE_WRITE_MULTI(_default, 1, 8)
_BUS_SPACE_WRITE_MULTI(_default, 2, 16)
_BUS_SPACE_WRITE_MULTI(_default, 4, 32)
_BUS_SPACE_WRITE_MULTI(_default, 8, 64)
_BUS_SPACE_WRITE_REGION(_default, 1, 8)
_BUS_SPACE_WRITE_REGION(_default, 2, 16)
_BUS_SPACE_WRITE_REGION(_default, 4, 32)
_BUS_SPACE_WRITE_REGION(_default, 8, 64)
_BUS_SPACE_SET_MULTI(_default, 1, 8)
_BUS_SPACE_SET_MULTI(_default, 2, 16)
_BUS_SPACE_SET_MULTI(_default, 4, 32)
_BUS_SPACE_SET_MULTI(_default, 8, 64)
_BUS_SPACE_SET_REGION(_default, 1, 8)
_BUS_SPACE_SET_REGION(_default, 2, 16)
_BUS_SPACE_SET_REGION(_default, 4, 32)
_BUS_SPACE_SET_REGION(_default, 8, 64)
_BUS_SPACE_COPY_REGION(_default, 1, 8)
_BUS_SPACE_COPY_REGION(_default, 2, 16)
_BUS_SPACE_COPY_REGION(_default, 4, 32)
_BUS_SPACE_COPY_REGION(_default, 8, 64)
#undef VADDR
static int _default_map(void *, bus_addr_t, bus_size_t, int,
bus_space_handle_t *);
static void _default_unmap(void *, bus_space_handle_t, bus_size_t);
static int _default_subregion(void *, bus_space_handle_t, bus_size_t,
bus_size_t, bus_space_handle_t *);
static int _default_alloc(void *, 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 _default_free(void *, bus_space_handle_t, bus_size_t);
static void *_default_vaddr(void *, bus_space_handle_t);
static const struct ews4800mips_bus_space _default_bus_space = {
.ebs_map = _default_map,
.ebs_unmap = _default_unmap,
.ebs_subregion = _default_subregion,
.ebs_alloc = _default_alloc,
.ebs_free = _default_free,
.ebs_vaddr = _default_vaddr,
.ebs_r_1 = _default_read_1,
.ebs_r_2 = _default_read_2,
.ebs_r_4 = _default_read_4,
.ebs_r_8 = _default_read_8,
.ebs_rm_1 = _default_read_multi_1,
.ebs_rm_2 = _default_read_multi_2,
.ebs_rm_4 = _default_read_multi_4,
.ebs_rm_8 = _default_read_multi_8,
.ebs_rr_1 = _default_read_region_1,
.ebs_rr_2 = _default_read_region_2,
.ebs_rr_4 = _default_read_region_4,
.ebs_rr_8 = _default_read_region_8,
.ebs_w_1 = _default_write_1,
.ebs_w_2 = _default_write_2,
.ebs_w_4 = _default_write_4,
.ebs_w_8 = _default_write_8,
.ebs_wm_1 = _default_write_multi_1,
.ebs_wm_2 = _default_write_multi_2,
.ebs_wm_4 = _default_write_multi_4,
.ebs_wm_8 = _default_write_multi_8,
.ebs_wr_1 = _default_write_region_1,
.ebs_wr_2 = _default_write_region_2,
.ebs_wr_4 = _default_write_region_4,
.ebs_wr_8 = _default_write_region_8,
.ebs_sm_1 = _default_set_multi_1,
.ebs_sm_2 = _default_set_multi_2,
.ebs_sm_4 = _default_set_multi_4,
.ebs_sm_8 = _default_set_multi_8,
.ebs_sr_1 = _default_set_region_1,
.ebs_sr_2 = _default_set_region_2,
.ebs_sr_4 = _default_set_region_4,
.ebs_sr_8 = _default_set_region_8,
.ebs_c_1 = _default_copy_region_1,
.ebs_c_2 = _default_copy_region_2,
.ebs_c_4 = _default_copy_region_4,
.ebs_c_8 = _default_copy_region_8
};
/* create default bus_space_tag */
int
bus_space_create(bus_space_tag_t t, const char *name,
bus_addr_t addr, bus_size_t size)
{
struct ews4800mips_bus_space *ebs = t;
if (ebs == NULL)
return EFAULT;
/* set default method */
*ebs = _default_bus_space; /* structure assignment */
ebs->ebs_cookie = ebs;
/* set access region */
if (size == 0) {
/* no extent */
ebs->ebs_base_addr = addr;
ebs->ebs_size = size;
} else {
ebs->ebs_extent = extent_create(name, addr, addr + size - 1,
M_DEVBUF, 0, 0, EX_NOWAIT);
if (ebs->ebs_extent == NULL) {
panic("%s:: unable to create bus_space for "
"0x%08lx-%#lx", __func__, addr, size);
}
}
return 0;
}
void
bus_space_destroy(bus_space_tag_t t)
{
struct ews4800mips_bus_space *ebs = t;
struct extent *ex = ebs->ebs_extent;
if (ex != NULL)
extent_destroy(ex);
}
void
_bus_space_invalid_access(void)
{
panic("invalid bus space access.");
}
/* default bus_space tag */
static int
_default_map(void *t, bus_addr_t bpa, bus_size_t size, int flags,
bus_space_handle_t *bshp)
{
struct ews4800mips_bus_space *ebs = t;
struct extent *ex = ebs->ebs_extent;
int error;
if (ex == NULL) {
if (bpa + size > ebs->ebs_size)
return EFAULT;
*bshp = (bus_space_handle_t)(ebs->ebs_base_addr + bpa);
return 0;
}
bpa += ex->ex_start;
error = extent_alloc_region(ex, bpa, size, EX_NOWAIT | EX_MALLOCOK);
if (error) {
DPRINTF("failed.\n");
return error;
}
*bshp = (bus_space_handle_t)bpa;
DPRINTF("success.\n");
return 0;
}
static int
_default_subregion(void *t, bus_space_handle_t bsh,
bus_size_t offset, bus_size_t size, bus_space_handle_t *nbshp)
{
*nbshp = bsh + offset;
return 0;
}
static int
_default_alloc(void *t, bus_addr_t rstart, bus_addr_t rend,
bus_size_t size, bus_size_t alignment, bus_size_t boundary,
int flags, bus_addr_t *bpap, bus_space_handle_t *bshp)
{
struct ews4800mips_bus_space *ebs = t;
struct extent *ex = ebs->ebs_extent;
u_long bpa, base;
int error;
if (ex == NULL) {
if (rend > ebs->ebs_size)
return EFAULT;
*bshp = *bpap = rstart + ebs->ebs_base_addr;
return 0;
}
base = ex->ex_start;
error = extent_alloc_subregion(ex, rstart + base, rend + base, size,
alignment, boundary,
EX_FAST | EX_NOWAIT | EX_MALLOCOK,
&bpa);
if (error) {
DPRINTF("failed.\n");
return error;
}
*bshp = (bus_space_handle_t)bpa;
if (bpap)
*bpap = bpa;
DPRINTF("success.\n");
return 0;
}
static void
_default_free(void *t, bus_space_handle_t bsh, bus_size_t size)
{
struct ews4800mips_bus_space *ebs = t;
struct extent *ex = ebs->ebs_extent;
if (ex != NULL)
_default_unmap(t, bsh, size);
}
static void
_default_unmap(void *t, bus_space_handle_t bsh, bus_size_t size)
{
struct ews4800mips_bus_space *ebs = t;
struct extent *ex = ebs->ebs_extent;
int error;
if (ex == NULL)
return;
error = extent_free(ex, bsh, size, EX_NOWAIT);
if (error) {
DPRINTF("%#lx-%#lx of %s space lost\n", bsh, bsh + size,
ex->ex_name);
}
}
void *
_default_vaddr(void *t, bus_space_handle_t h)
{
return (void *)h;
}