Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.

===================================================================
RCS file: /ftp/cvs/cvsroot/src/sys/arch/i386/i386/locore.S,v
retrieving revision 1.49
retrieving revision 1.50
diff -u -p -r1.49 -r1.50
--- src/sys/arch/i386/i386/locore.S	2007/08/16 17:00:05	1.49
+++ src/sys/arch/i386/i386/locore.S	2007/08/29 23:38:04	1.50
@@ -1,4 +1,4 @@
-/*	$NetBSD: locore.S,v 1.49 2007/08/16 17:00:05 ad Exp $	*/
+/*	$NetBSD: locore.S,v 1.50 2007/08/29 23:38:04 ad Exp $	*/
 
 /*-
  * Copyright (c) 1998, 2000, 2004, 2006, 2007 The NetBSD Foundation, Inc.
@@ -937,3 +937,65 @@ NENTRY(npx586bug1)
 	popl	%eax
 	ret
 #endif /* NNPX > 0 */
+
+/*
+ * void sse2_zero_page(void *pg)
+ *
+ * Zero a page without polluting the cache.
+ */
+ENTRY(sse2_zero_page)
+	pushl	%ebp
+	movl	%esp,%ebp
+	movl	8(%esp), %edx
+	movl	$PAGE_SIZE, %ecx
+	xorl	%eax, %eax
+	.align	16
+1:
+	movnti	%eax, 0(%edx)
+	movnti	%eax, 4(%edx)
+	movnti	%eax, 8(%edx)
+	movnti	%eax, 12(%edx)
+	movnti	%eax, 16(%edx)
+	movnti	%eax, 20(%edx)
+	movnti	%eax, 24(%edx)
+	movnti	%eax, 28(%edx)
+	subl	$32, %ecx
+	leal	32(%edx), %edx
+	jnz	1b
+	sfence
+	pop	%ebp
+	ret
+
+/*
+ * void sse2_copy_page(void *src, void *dst)
+ *
+ * Copy a page without polluting the cache.
+ */
+ENTRY(sse2_copy_page)
+	pushl	%ebp
+	pushl	%ebx
+	pushl	%esi
+	pushl	%edi
+	movl	20(%esp), %esi
+	movl	24(%esp), %edi
+	movl	$PAGE_SIZE, %ebp
+	.align	16
+1:
+	movl	0(%esi), %eax
+	movl	4(%esi), %ebx
+	movl	8(%esi), %ecx
+	movl	12(%esi), %edx
+	movnti	%eax, 0(%edi)
+	movnti	%ebx, 4(%edi)
+	movnti	%ecx, 8(%edi)
+	movnti	%edx, 12(%edi)
+	subl	$16, %ebp
+	leal	16(%esi), %esi
+	leal	16(%edi), %edi
+	jnz	1b
+	sfence
+	popl	%edi
+	popl	%esi
+	popl	%ebx
+	popl	%ebp
+	ret