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/*
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
*/
#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;
}
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