kdrive: dont try MTRR on non-x86, fix backspace mapping

hw/kdrive/linux/keyboard.c

 /*
- * $XFree86$
+ * $XFree86: xc/programs/Xserver/hw/kdrive/linux/keyboard.c,v 1.4 2000/10/10 14:05:48 tsi Exp $
  *
  * Copyright  1999 Keith Packard
  *
@@ -64,7 +64,7 @@ static const KeySym linux_to_x[256] = {
 	XK_p,		XK_q,		XK_r,		XK_s,
 	XK_t,		XK_u,		XK_v,		XK_w,
 	XK_x,		XK_y,		XK_z,		XK_braceleft,
-	XK_bar,		XK_braceright,	XK_asciitilde,	XK_Delete,
+	XK_bar,		XK_braceright,	XK_asciitilde,	XK_BackSpace,
 	NoSymbol,	NoSymbol,	NoSymbol,	NoSymbol,
 	NoSymbol,	NoSymbol,	NoSymbol,	NoSymbol,
 	NoSymbol,	NoSymbol,	NoSymbol,	NoSymbol,

hw/kdrive/src/kmap.c

@@ -26,6 +26,12 @@
 #include "kdrive.h"
 
 #ifdef linux
+#ifdef __i386__
+#define HAS_MTRR
+#endif
+#endif
+
+#ifdef HAS_MTRR
 #include <errno.h>
 #include <unistd.h>
 #include <sys/mman.h>
@@ -91,14 +97,14 @@ KdUnmapDevice (void *addr, CARD32 size)
 #endif
 }
 
-#ifdef linux
+#ifdef HAS_MTRR
 static int  mtrr;
 #endif
 
 void
 KdSetMappedMode (CARD32 addr, CARD32 size, int mode)
 {
-#ifdef linux
+#ifdef HAS_MTRR
     struct mtrr_sentry  sentry;
     unsigned long    	base, bound;
     unsigned int	type;
@@ -131,7 +137,7 @@ KdSetMappedMode (CARD32 addr, CARD32 size, int mode)
 void
 KdResetMappedMode (CARD32 addr, CARD32 size, int mode)
 {
-#ifdef linux
+#ifdef HAS_MTRR
     struct mtrr_sentry  sentry;
     unsigned long    	base, bound;
     unsigned int	type;