xserver-multidpi/hw/xfree86/os-support/misc/SlowBcopy.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

117 lines
2.4 KiB
C

/*******************************************************************************
for Alpha Linux
*******************************************************************************/
/*
* Create a dependency that should be immune from the effect of register
* renaming as is commonly seen in superscalar processors. This should
* insert a minimum of 100-ns delays between reads/writes at clock rates
* up to 100 MHz---GGL
*
* Slowbcopy(char *src, char *dst, int count)
*
*/
#ifdef HAVE_XORG_CONFIG_H
#include <xorg-config.h>
#endif
#include <X11/X.h>
#include "xf86.h"
#include "xf86Priv.h"
#include "xf86_OSlib.h"
#include "compiler.h"
static int really_slow_bcopy;
void
xf86SetReallySlowBcopy(void)
{
really_slow_bcopy = 1;
}
#if defined(__i386__) || defined(__amd64__)
static void
xf86_really_slow_bcopy(unsigned char *src, unsigned char *dst, int len)
{
while (len--) {
*dst++ = *src++;
outb(0x80, 0x00);
}
}
#endif
/* The outb() isn't needed on my machine, but who knows ... -- ost */
void
xf86SlowBcopy(unsigned char *src, unsigned char *dst, int len)
{
#if defined(__i386__) || defined(__amd64__)
if (really_slow_bcopy) {
xf86_really_slow_bcopy(src, dst, len);
return;
}
#endif
while (len--)
*dst++ = *src++;
}
#ifdef __alpha__
#ifdef linux
unsigned long _bus_base(void);
#define useSparse() (!_bus_base())
#define SPARSE (7)
#else
#define useSparse() 0
#define SPARSE 0
#endif
void
xf86SlowBCopyFromBus(unsigned char *src, unsigned char *dst, int count)
{
if (useSparse()) {
unsigned long addr;
long result;
addr = (unsigned long) src;
while (count) {
result = *(volatile int *) addr;
result >>= ((addr >> SPARSE) & 3) * 8;
*dst++ = (unsigned char) (0xffUL & result);
addr += 1 << SPARSE;
count--;
outb(0x80, 0x00);
}
}
else
xf86SlowBcopy(src, dst, count);
}
void
xf86SlowBCopyToBus(unsigned char *src, unsigned char *dst, int count)
{
if (useSparse()) {
unsigned long addr;
addr = (unsigned long) dst;
while (count) {
*(volatile unsigned int *) addr =
(unsigned short) (*src) * 0x01010101;
src++;
addr += 1 << SPARSE;
count--;
outb(0x80, 0x00);
}
}
else
xf86SlowBcopy(src, dst, count);
}
#endif