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5ef53a94ce
xf86SlowBCopyToBus and xf86SlowBCopyFromBus cause segfaults on my system. Also remove associated slowbcopy_tobus/slowbcopy_frombus macros. Signed-off-by: Matt Turner <mattst88@gmail.com>
49 lines
1 KiB
C
49 lines
1 KiB
C
/*
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* Create a dependency that should be immune from the effect of register
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* renaming as is commonly seen in superscalar processors. This should
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* insert a minimum of 100-ns delays between reads/writes at clock rates
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* up to 100 MHz---GGL
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*/
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#ifdef HAVE_XORG_CONFIG_H
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#include <xorg-config.h>
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#endif
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#include <X11/X.h>
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#include "xf86.h"
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#include "xf86Priv.h"
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#include "xf86_OSlib.h"
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#include "compiler.h"
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static int really_slow_bcopy;
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void
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xf86SetReallySlowBcopy(void)
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{
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really_slow_bcopy = 1;
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}
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#if defined(__i386__) || defined(__amd64__)
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static void xf86_really_slow_bcopy(unsigned char *src, unsigned char *dst, int len)
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{
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while(len--)
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{
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*dst++ = *src++;
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outb(0x80, 0x00);
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}
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}
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#endif
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/* The outb() isn't needed on my machine, but who knows ... -- ost */
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void
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xf86SlowBcopy(unsigned char *src, unsigned char *dst, int len)
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{
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#if defined(__i386__) || defined(__amd64__)
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if (really_slow_bcopy) {
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xf86_really_slow_bcopy(src, dst, len);
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return;
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}
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#endif
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while(len--)
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*dst++ = *src++;
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}
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