115 lines
3.3 KiB
C
115 lines
3.3 KiB
C
/* $NetBSD: alpha_bus_window.c,v 1.4 2012/03/22 08:52:22 he Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 2000 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Jason R. Thorpe.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
/*
|
|
* Support for mapping Alpha bus windows. This is currently used to
|
|
* provide bus space mapping support for XFree86. In a perfect world,
|
|
* this would go away in favor of a real bus space mapping framework.
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/mman.h>
|
|
|
|
#include <machine/sysarch.h>
|
|
|
|
#include <fcntl.h>
|
|
#include <paths.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
int
|
|
alpha_bus_getwindows(int type, struct alpha_bus_window **abwp)
|
|
{
|
|
struct alpha_bus_get_window_count_args count_args;
|
|
struct alpha_bus_get_window_args window_args;
|
|
struct alpha_bus_window *abw;
|
|
unsigned int i;
|
|
|
|
count_args.type = type;
|
|
if (sysarch(ALPHA_BUS_GET_WINDOW_COUNT, &count_args) != 0)
|
|
return (-1);
|
|
|
|
abw = malloc(sizeof(*abw) * count_args.count);
|
|
if (abw == NULL)
|
|
return (-1);
|
|
memset(abw, 0, sizeof(*abw) * count_args.count);
|
|
|
|
for (i = 0; i < count_args.count; i++) {
|
|
window_args.type = type;
|
|
window_args.window = i;
|
|
window_args.translation = &abw[i].abw_abst;
|
|
if (sysarch(ALPHA_BUS_GET_WINDOW, &window_args) != 0) {
|
|
free(abw);
|
|
return (-1);
|
|
}
|
|
}
|
|
|
|
*abwp = abw;
|
|
return (count_args.count);
|
|
}
|
|
|
|
int
|
|
alpha_bus_mapwindow(struct alpha_bus_window *abw)
|
|
{
|
|
struct alpha_bus_space_translation *abst = &abw->abw_abst;
|
|
void *addr;
|
|
size_t size;
|
|
int fd;
|
|
|
|
fd = open(_PATH_MEM, O_RDWR, 0600);
|
|
if (fd == -1)
|
|
return (-1);
|
|
|
|
size = ((abst->abst_bus_end - abst->abst_bus_start) + 1) <<
|
|
abst->abst_addr_shift;
|
|
|
|
addr = mmap(NULL, size, PROT_READ|PROT_WRITE, MAP_FILE|MAP_SHARED,
|
|
fd, (off_t) abst->abst_sys_start);
|
|
|
|
(void) close(fd);
|
|
|
|
if (addr == MAP_FAILED)
|
|
return (-1);
|
|
|
|
abw->abw_addr = addr;
|
|
abw->abw_size = size;
|
|
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
alpha_bus_unmapwindow(struct alpha_bus_window *abw)
|
|
{
|
|
|
|
(void) munmap(abw->abw_addr, abw->abw_size);
|
|
}
|