mirror of https://github.com/mpv-player/mpv
116 lines
3.3 KiB
C
116 lines
3.3 KiB
C
/*
|
|
This file is based on:
|
|
$XFree86: xc/programs/Xserver/hw/xfree86/etc/scanpci.c,v 3.34.2.17 1998/11/10 11:55:40 dawes Exp $
|
|
Modified for readability by Nick Kurshev
|
|
*/
|
|
/*
|
|
* Copyright 1995 by Robin Cutshaw <robin@XFree86.Org>
|
|
*
|
|
* Permission to use, copy, modify, distribute, and sell this software and its
|
|
* documentation for any purpose is hereby granted without fee, provided that
|
|
* the above copyright notice appear in all copies and that both that
|
|
* copyright notice and this permission notice appear in supporting
|
|
* documentation, and that the names of the above listed copyright holder(s)
|
|
* not be used in advertising or publicity pertaining to distribution of
|
|
* the software without specific, written prior permission. The above listed
|
|
* copyright holder(s) make(s) no representations about the suitability of this
|
|
* software for any purpose. It is provided "as is" without express or
|
|
* implied warranty.
|
|
*
|
|
* THE ABOVE LISTED COPYRIGHT HOLDER(S) DISCLAIM(S) ALL WARRANTIES WITH REGARD
|
|
* TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
|
|
* AND FITNESS, IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT HOLDER(S) BE
|
|
* LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY
|
|
* DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
|
|
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
|
|
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
|
|
#if defined(Lynx_22)
|
|
#ifndef GCCUSESGAS
|
|
#define GCCUSESGAS
|
|
#endif
|
|
|
|
/* let's mimick the Linux Alpha stuff for LynxOS so we don't have
|
|
* to change too much code
|
|
*/
|
|
#include <smem.h>
|
|
|
|
static unsigned char *pciConfBase;
|
|
|
|
static __inline__ void enable_os_io(void)
|
|
{
|
|
pciConfBase = (unsigned char *) smem_create("PCI-CONF",
|
|
(char *)0x80800000, 64*1024, SM_READ|SM_WRITE);
|
|
if (pciConfBase == (void *) -1)
|
|
exit(1);
|
|
}
|
|
|
|
static __inline__ void disable_os_io(void)
|
|
{
|
|
smem_create(NULL, (char *) pciConfBase, 0, SM_DETACH);
|
|
smem_remove("PCI-CONF");
|
|
pciConfBase = NULL;
|
|
}
|
|
|
|
#include <smem.h>
|
|
|
|
static unsigned char *pciConfBase;
|
|
|
|
static __inline__ unsigned long
|
|
static swapl(unsigned long val)
|
|
{
|
|
unsigned char *p = (unsigned char *)&val;
|
|
return (p[3] << 24) | (p[2] << 16) | (p[1] << 8) | (p[0] << 0);
|
|
}
|
|
|
|
|
|
#define BUS(tag) (((tag)>>16)&0xff)
|
|
#define DFN(tag) (((tag)>>8)&0xff)
|
|
|
|
#define PCIBIOS_DEVICE_NOT_FOUND 0x86
|
|
#define PCIBIOS_SUCCESSFUL 0x00
|
|
|
|
static int pciconfig_read(
|
|
unsigned char bus,
|
|
unsigned char dev,
|
|
unsigned char offset,
|
|
int len, /* unused, alway 4 */
|
|
unsigned long *val)
|
|
{
|
|
unsigned long _val;
|
|
unsigned long *ptr;
|
|
|
|
dev >>= 3;
|
|
if (bus || dev >= 16) {
|
|
*val = 0xFFFFFFFF;
|
|
return PCIBIOS_DEVICE_NOT_FOUND;
|
|
} else {
|
|
ptr = (unsigned long *)(pciConfBase + ((1<<dev) | offset));
|
|
_val = swapl(*ptr);
|
|
}
|
|
*val = _val;
|
|
return PCIBIOS_SUCCESSFUL;
|
|
}
|
|
|
|
static int pciconfig_write(
|
|
unsigned char bus,
|
|
unsigned char dev,
|
|
unsigned char offset,
|
|
int len, /* unused, alway 4 */
|
|
unsigned long val)
|
|
{
|
|
unsigned long _val;
|
|
unsigned long *ptr;
|
|
|
|
dev >>= 3;
|
|
_val = swapl(val);
|
|
if (bus || dev >= 16) {
|
|
return PCIBIOS_DEVICE_NOT_FOUND;
|
|
} else {
|
|
ptr = (unsigned long *)(pciConfBase + ((1<<dev) | offset));
|
|
*ptr = _val;
|
|
}
|
|
return PCIBIOS_SUCCESSFUL;
|
|
}
|