Remove unused BUSmemcpy.c

BUSmemcpy.c provides xf86BusToMem and xf86MemToBus, which are are memcpy
wrappers written to avoid glibc's memcpy on Alpha. glibc'c memcpy on
Alpha has improved much since this was written, so it's no longer
needed. Neither function is used inside the xserver, and no module on
my machine uses either as well.

Signed-off-by: Matt Turner <mattst88@gmail.com>

3 files changed, 1 insertions, 190 deletions

diff --git a/hw/xfree86/os-support/misc/BUSmemcpy.c b/hw/xfree86/os-support/misc/BUSmemcpy.c
deleted file mode 100644
index e6ffde97e..000000000
--- a/hw/xfree86/os-support/misc/BUSmemcpy.c
+++ /dev/null
@@ -1,187 +0,0 @@
-
-/****************************************************************************
-
- For Alpha Linux, BusToMem() and MemToBus() can be simply memcpy(), BUT:
-  we need to prevent unaligned operations when accessing DENSE space on the BUS,
-  as the video memory is mmap'd that way. The below code does this.
-
-NOTE: we could simply use the "memcpy()" from LIBC here, but that, currently, is
-      not as fast.
-
-Thanks to Linus Torvalds for contributing this code.
-
-****************************************************************************/
-
-
-#ifdef HAVE_XORG_CONFIG_H
-#include <xorg-config.h>
-#endif
-
-#include <X11/X.h>
-#include "xf86.h"
-#include "xf86Priv.h"
-#include "xf86_OSlib.h"
-
-#ifdef __alpha__
-
-#include "compiler.h"
-
-#define LWORD_CODING (0x60)
-#define SPARSE (7)
-
-static unsigned long __memcpy(unsigned long dest, unsigned long src, int n);
-
-void
-xf86BusToMem(unsigned char *dst, unsigned char *src, int len)
-{
-	__memcpy((unsigned long)dst, (unsigned long)src, len);
-}
-void
-xf86MemToBus(unsigned char *dst, unsigned char *src, int len)
-{
-  if (len == sizeof(int))
-    if (!(((long)src | (long)dst) & 3))
-      *((unsigned int*)dst) = *((unsigned int*)(src));
-    else {
-      int i;
-      if (((long)src) & 3)
-	i = ldl_u((unsigned int*)src);
-      else
-	i = *(unsigned int*)src;
-      if (((long)dst) & 3)
-	stl_u(i,(unsigned int*)dst);
-      else
-	*(unsigned int*)dst = i;
-    }
-  else
-    __memcpy((unsigned long)dst, (unsigned long)src, len);
-}
-
-/*
- *  linux/arch/alpha/lib/memcpy.c
- *
- *  Copyright (C) 1995  Linus Torvalds, used with his permission.
- */
-
-/*
- * This is a reasonably optimized memcpy() routine.
- */
-
-/*
- * Note that the C code is written to be optimized into good assembly. However,
- * at this point gcc is unable to sanely compile "if (n >= 0)", resulting in a
- * explicit compare against 0 (instead of just using the proper "blt reg, xx" or
- * "bge reg, xx"). I hope alpha-gcc will be fixed to notice this eventually..
- */
-
-/*
- * This should be done in one go with ldq_u*2/mask/stq_u. Do it
- * with a macro so that we can fix it up later..
- */
-#define ALIGN_DEST_TO8(d,s,n) \
-	while (d & 7) { \
-		if (n <= 0) return; \
-		n--; \
-		*(char *) d = *(char *) s; \
-		d++; s++; \
-	}
-
-/*
- * This should similarly be done with ldq_u*2/mask/stq. The destination
- * is aligned, but we don't fill in a full quad-word
- */
-#define DO_REST(d,s,n) \
-	while (n > 0) { \
-		n--; \
-		*(char *) d = *(char *) s; \
-		d++; s++; \
-	}
-
-/*
- * This should be done with ldq/mask/stq. The source and destination are
- * aligned, but we don't fill in a full quad-word
- */
-#define DO_REST_ALIGNED(d,s,n) DO_REST(d,s,n)
-
-/*
- * This does unaligned memory copies. We want to avoid storing to
- * an unaligned address, as that would do a read-modify-write cycle.
- * We also want to avoid double-reading the unaligned reads.
- *
- * Note the ordering to try to avoid load (and address generation) latencies.
- */
-static __inline__ void __memcpy_unaligned(unsigned long d, unsigned long s, long n)
-{
-	ALIGN_DEST_TO8(d,s,n);
-	n -= 8;			/* to avoid compare against 8 in the loop */
-	if (n >= 0) {
-		unsigned long low_word, high_word;
-		__asm__("ldq_u %0,%1":"=r" (low_word):"m" (*(unsigned long *) s));
-		do {
-			unsigned long tmp;
-			__asm__("ldq_u %0,%1":"=r" (high_word):"m" (*(unsigned long *)(s+8)));
-			n -= 8;
-			__asm__("extql %1,%2,%0"
-				:"=r" (low_word)
-				:"r" (low_word), "r" (s));
-			__asm__("extqh %1,%2,%0"
-				:"=r" (tmp)
-				:"r" (high_word), "r" (s));
-			s += 8;
-			*(unsigned long *) d = low_word | tmp;
-			d += 8;
-			low_word = high_word;
-		} while (n >= 0);
-	}
-	n += 8;
-	DO_REST(d,s,n);
-}
-
-/*
- * Hmm.. Strange. The __asm__ here is there to make gcc use a integer register
- * for the load-store. I don't know why, but it would seem that using a floating
- * point register for the move seems to slow things down (very small difference,
- * though).
- *
- * Note the ordering to try to avoid load (and address generation) latencies.
- */
-static __inline__ void __memcpy_aligned(unsigned long d, unsigned long s, long n)
-{
-	ALIGN_DEST_TO8(d,s,n);
-	n -= 8;
-	while (n >= 0) {
-		unsigned long tmp;
-		__asm__("ldq %0,%1":"=r" (tmp):"m" (*(unsigned long *) s));
-		n -= 8;
-		s += 8;
-		*(unsigned long *) d = tmp;
-		d += 8;
-	}
-	n += 8;
-	DO_REST_ALIGNED(d,s,n);
-}
-
-static unsigned long __memcpy(unsigned long dest, unsigned long src, int n)
-{
-	if (!((dest ^ src) & 7)) {
-		__memcpy_aligned(dest, src, n);
-		return dest;
-	}
-	__memcpy_unaligned(dest, src, n);
-	return dest;
-}
-
-#else /* __alpha__ */
-
-void
-xf86BusToMem(unsigned char *dst, unsigned char *src, int len)
-{
-	memcpy(dst, src, len);
-}
-void
-xf86MemToBus(unsigned char *dst, unsigned char *src, int len)
-{
-	memcpy(dst, src, len);
-}
-
-#endif /* __alpha__ */
diff --git a/hw/xfree86/os-support/misc/Makefile.am b/hw/xfree86/os-support/misc/Makefile.am
index 3d4b8ff0e..ce63583ac 100644
--- a/hw/xfree86/os-support/misc/Makefile.am
+++ b/hw/xfree86/os-support/misc/Makefile.am
@@ -1,7 +1,7 @@
 
 noinst_LTLIBRARIES = libmisc.la
 
-libmisc_la_SOURCES = Delay.c BUSmemcpy.c SlowBcopy.c
+libmisc_la_SOURCES = Delay.c SlowBcopy.c
 
 #AM_LDFLAGS = -r
 
diff --git a/hw/xfree86/os-support/xf86_OSproc.h b/hw/xfree86/os-support/xf86_OSproc.h
index 98d7932e7..7e0767966 100644
--- a/hw/xfree86/os-support/xf86_OSproc.h
+++ b/hw/xfree86/os-support/xf86_OSproc.h
@@ -143,8 +143,6 @@ extern _X_EXPORT void xf86SetTVOut(int);
 extern _X_EXPORT void xf86SetRGBOut(void);
 #endif
 extern _X_EXPORT void xf86OSRingBell(int, int, int);
-extern _X_EXPORT void xf86BusToMem(unsigned char *, unsigned char *, int);
-extern _X_EXPORT void xf86MemToBus(unsigned char *, unsigned char *, int);
 extern _X_EXPORT void xf86UDelay(long usec);
 extern _X_EXPORT void xf86SetReallySlowBcopy(void);
 extern _X_EXPORT void xf86SlowBcopy(unsigned char *, unsigned char *, int);