xserver-multidpi/hw/xfree86/os-support/shared/bios_mmap.c
Keith Packard 9838b7032e Introduce a consistent coding style
This is strictly the application of the script 'x-indent-all.sh'
from util/modular. Compared to the patch that Daniel posted in
January, I've added a few indent flags:

	-bap
	-psl
	-T PrivatePtr
	-T pmWait
	-T _XFUNCPROTOBEGIN
	-T _XFUNCPROTOEND
	-T _X_EXPORT

The typedefs were needed to make the output of sdksyms.sh match the
previous output, otherwise, the code is formatted badly enough that
sdksyms.sh generates incorrect output.

The generated code was compared with the previous version and found to
be essentially identical -- "assert" line numbers and BUILD_TIME were
the only differences found.

The comparison was done with this script:

dir1=$1
dir2=$2

for dir in $dir1 $dir2; do
	(cd $dir && find . -name '*.o' | while read file; do
		dir=`dirname $file`
		base=`basename $file .o`
		dump=$dir/$base.dump
		objdump -d $file > $dump
	done)
done

find $dir1 -name '*.dump' | while read dump; do
	otherdump=`echo $dump | sed "s;$dir1;$dir2;"`
	diff -u $dump $otherdump
done

Signed-off-by: Keith Packard <keithp@keithp.com>
Acked-by: Daniel Stone <daniel@fooishbar.org>
Acked-by: Alan Coopersmith <alan.coopersmith@oracle.com>
2012-03-21 13:54:42 -07:00

136 lines
3.8 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"
/*
* Read BIOS via mmap()ing DEV_MEM
*/
#ifndef __alpha__
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 = getpagesize();
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;
}
DebugF("xf86ReadBIOS: BIOS at 0x%08x has signature 0x%04x\n",
Base, ptr[0] | (ptr[1] << 8));
(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...
*/
#ifdef linux
extern unsigned long _bus_base(void);
#define BUS_BASE _bus_base()
#else
extern u_int64_t dense_base(void);
#define BUS_BASE dense_base()
#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 = getpagesize();
Offset += Base & (psize - 1);
Base &= ~(psize - 1);
mlen = (Offset + Len + psize - 1) & ~(psize - 1);
base = mmap((caddr_t) 0, mlen, PROT_READ,
MAP_SHARED, fd, (off_t) (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 + Offset), Buf, Len);
munmap((caddr_t) base, mlen);
close(fd);
return Len;
}
#endif /* __alpha__ */