163 lines
4.2 KiB
C
163 lines
4.2 KiB
C
/*
|
|
* Copyright 1993 by David Wexelblat <dwex@goblin.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 name of David Wexelblat not be used in
|
|
* advertising or publicity pertaining to distribution of the software without
|
|
* specific, written prior permission. David Wexelblat makes no representations
|
|
* about the suitability of this software for any purpose. It is provided
|
|
* "as is" without express or implied warranty.
|
|
*
|
|
* DAVID WEXELBLAT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
|
|
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
|
|
* EVENT SHALL DAVID WEXELBLAT 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.
|
|
*
|
|
*/
|
|
|
|
#ifdef HAVE_XORG_CONFIG_H
|
|
#include <xorg-config.h>
|
|
#endif
|
|
|
|
#include <X11/X.h>
|
|
|
|
#include "xf86.h"
|
|
#include "xf86Priv.h"
|
|
#include "xf86_OSlib.h"
|
|
|
|
#ifndef MAP_FAILED
|
|
#define MAP_FAILED ((void *)-1)
|
|
#endif
|
|
|
|
/*
|
|
* Read BIOS via mmap()ing DEV_MEM
|
|
*/
|
|
|
|
#ifndef __alpha__
|
|
_X_EXPORT int
|
|
xf86ReadBIOS(unsigned long Base, unsigned long Offset, unsigned char *Buf,
|
|
int Len)
|
|
{
|
|
int fd;
|
|
unsigned char *ptr;
|
|
int psize;
|
|
int mlen;
|
|
|
|
if ((fd = open(DEV_MEM, O_RDONLY)) < 0)
|
|
{
|
|
xf86Msg(X_WARNING, "xf86ReadBIOS: Failed to open %s (%s)\n",
|
|
DEV_MEM, strerror(errno));
|
|
return(-1);
|
|
}
|
|
psize = xf86getpagesize();
|
|
Offset += Base & (psize - 1);
|
|
Base &= ~(psize - 1);
|
|
mlen = (Offset + Len + psize - 1) & ~(psize - 1);
|
|
ptr = (unsigned char *)mmap((caddr_t)0, mlen, PROT_READ,
|
|
MAP_SHARED, fd, (off_t)Base);
|
|
if (ptr == MAP_FAILED)
|
|
{
|
|
xf86Msg(X_WARNING, "xf86ReadBIOS: %s mmap failed (%s)\n",
|
|
DEV_MEM, strerror(errno));
|
|
close(fd);
|
|
return(-1);
|
|
}
|
|
#ifdef DEBUG
|
|
ErrorF("xf86ReadBIOS: BIOS at 0x%08x has signature 0x%04x\n",
|
|
Base, ptr[0] | (ptr[1] << 8));
|
|
#endif
|
|
(void)memcpy(Buf, (void *)(ptr + Offset), Len);
|
|
(void)munmap((caddr_t)ptr, mlen);
|
|
(void)close(fd);
|
|
return(Len);
|
|
}
|
|
|
|
#else /* __alpha__ */
|
|
|
|
/*
|
|
* We trick "mmap" into mapping BUS memory for us via BUS_BASE,
|
|
* which is the KSEG address of the start of the DENSE memory
|
|
* area.
|
|
*/
|
|
|
|
/*
|
|
* NOTE: there prolly ought to be more validity checks and all
|
|
* re: boundaries and sizes and such...
|
|
*/
|
|
|
|
/*
|
|
* The Jensen lacks dense memory, thus we have to address the bus via
|
|
* the sparse addressing scheme.
|
|
*
|
|
* Martin Ostermann (ost@comnets.rwth-aachen.de) - Apr.-Sep. 1996
|
|
*/
|
|
|
|
#ifdef linux
|
|
|
|
#ifdef TEST_JENSEN_CODE /* define to test the Sparse addressing on a non-Jensen */
|
|
#define SPARSE (5)
|
|
#define isJensen (1)
|
|
#else
|
|
#define isJensen (!_bus_base())
|
|
#define SPARSE (7)
|
|
#endif
|
|
|
|
extern unsigned long _bus_base(void);
|
|
extern unsigned long _bus_base_sparse(void);
|
|
#define BUS_BASE (isJensen ? _bus_base_sparse() : _bus_base())
|
|
#define JENSEN_SHIFT(x) (isJensen ? ((long)x<<SPARSE) : (long)x)
|
|
|
|
#else
|
|
|
|
extern u_int64_t dense_base(void);
|
|
#define BUS_BASE dense_base()
|
|
#define JENSEN_SHIFT(x) ((long) x)
|
|
|
|
#endif
|
|
|
|
int
|
|
xf86ReadBIOS(unsigned long Base, unsigned long Offset, unsigned char *Buf,
|
|
int Len)
|
|
{
|
|
caddr_t base;
|
|
int fd;
|
|
int psize;
|
|
int mlen;
|
|
|
|
if ((fd = open(DEV_MEM, O_RDONLY)) < 0)
|
|
{
|
|
xf86Msg(X_WARNING, "xf86ReadBIOS: Failed to open %s (%s)\n",
|
|
DEV_MEM, strerror(errno));
|
|
return(-1);
|
|
}
|
|
|
|
psize = xf86getpagesize();
|
|
Offset += Base & (psize - 1);
|
|
Base &= ~(psize - 1);
|
|
mlen = (Offset + Len + psize - 1) & ~(psize - 1);
|
|
base = mmap((caddr_t)0, JENSEN_SHIFT(mlen), PROT_READ,
|
|
MAP_SHARED, fd, (off_t)(JENSEN_SHIFT(Base) + BUS_BASE));
|
|
|
|
if (base == MAP_FAILED)
|
|
{
|
|
xf86Msg(X_WARNING, "xf86ReadBIOS: Failed to mmap %s (%s)\n",
|
|
DEV_MEM, strerror(errno));
|
|
return(-1);
|
|
}
|
|
|
|
xf86SlowBCopyFromBus((unsigned char *)(base+JENSEN_SHIFT(Offset)),
|
|
Buf, Len);
|
|
|
|
munmap((caddr_t)JENSEN_SHIFT(base), JENSEN_SHIFT(mlen));
|
|
close(fd);
|
|
return(Len);
|
|
}
|
|
|
|
#endif /* __alpha__ */
|