The address used by mips1_FlushICache() is a virtual address, not a physical

address.  This caused DDB to hang the machine hard when trying to set a
breakpoint.

sys/arch/mips/mips/db_interface.c

@@ -1,4 +1,4 @@
-/*	$NetBSD: db_interface.c,v 1.2 1997/07/07 04:55:27 jonathan Exp $	*/
+/*	$NetBSD: db_interface.c,v 1.3 1997/11/11 16:50:57 mhitch Exp $	*/
 
 /* 
  * Mach Operating System
@@ -89,7 +89,7 @@ kdbpoke(vm_offset_t addr, int newval)
 #endif
 	} else {
 #ifdef MIPS1
-		mips1_FlushICache(MIPS_KSEG0_TO_PHYS(addr), sizeof(int));
+		mips1_FlushICache((vm_offset_t) addr, sizeof(int));
 #endif
 	}
 }