From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@ppc970.osdl.org>
Date: Sat, 16 Apr 2005 15:20:36 -0700
Subject: Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
---
 arch/sparc/lib/blockops.S | 89 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 89 insertions(+)
 create mode 100644 arch/sparc/lib/blockops.S

(limited to 'arch/sparc/lib/blockops.S')

diff --git a/arch/sparc/lib/blockops.S b/arch/sparc/lib/blockops.S
new file mode 100644
index 00000000000..a7c7ffaa4a9
--- /dev/null
+++ b/arch/sparc/lib/blockops.S
@@ -0,0 +1,89 @@
+/* $Id: blockops.S,v 1.8 1998/01/30 10:58:44 jj Exp $
+ * blockops.S: Common block zero optimized routines.
+ *
+ * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
+ */
+
+#include <asm/page.h>
+
+	/* Zero out 64 bytes of memory at (buf + offset).
+	 * Assumes %g1 contains zero.
+	 */
+#define BLAST_BLOCK(buf, offset) \
+	std	%g0, [buf + offset + 0x38]; \
+	std	%g0, [buf + offset + 0x30]; \
+	std	%g0, [buf + offset + 0x28]; \
+	std	%g0, [buf + offset + 0x20]; \
+	std	%g0, [buf + offset + 0x18]; \
+	std	%g0, [buf + offset + 0x10]; \
+	std	%g0, [buf + offset + 0x08]; \
+	std	%g0, [buf + offset + 0x00];
+
+	/* Copy 32 bytes of memory at (src + offset) to
+	 * (dst + offset).
+	 */
+#define MIRROR_BLOCK(dst, src, offset, t0, t1, t2, t3, t4, t5, t6, t7) \
+	ldd	[src + offset + 0x18], t0; \
+	ldd	[src + offset + 0x10], t2; \
+	ldd	[src + offset + 0x08], t4; \
+	ldd	[src + offset + 0x00], t6; \
+	std	t0, [dst + offset + 0x18]; \
+	std	t2, [dst + offset + 0x10]; \
+	std	t4, [dst + offset + 0x08]; \
+	std	t6, [dst + offset + 0x00];
+
+	/* Profiling evidence indicates that memset() is
+	 * commonly called for blocks of size PAGE_SIZE,
+	 * and (2 * PAGE_SIZE) (for kernel stacks)
+	 * and with a second arg of zero.  We assume in
+	 * all of these cases that the buffer is aligned
+	 * on at least an 8 byte boundary.
+	 *
+	 * Therefore we special case them to make them
+	 * as fast as possible.
+	 */
+
+	.text
+	.align	4
+	.globl	bzero_1page, __copy_1page
+
+bzero_1page:
+/* NOTE: If you change the number of insns of this routine, please check
+ * arch/sparc/mm/hypersparc.S */
+	/* %o0 = buf */
+	or	%g0, %g0, %g1
+	or	%o0, %g0, %o1
+	or	%g0, (PAGE_SIZE >> 8), %g2
+1:
+	BLAST_BLOCK(%o0, 0x00)
+	BLAST_BLOCK(%o0, 0x40)
+	BLAST_BLOCK(%o0, 0x80)
+	BLAST_BLOCK(%o0, 0xc0)
+	subcc	%g2, 1, %g2
+	bne	1b
+	 add	%o0, 0x100, %o0
+
+	retl
+	 nop
+
+__copy_1page:
+/* NOTE: If you change the number of insns of this routine, please check
+ * arch/sparc/mm/hypersparc.S */
+	/* %o0 = dst, %o1 = src */
+	or	%g0, (PAGE_SIZE >> 8), %g1
+1:
+	MIRROR_BLOCK(%o0, %o1, 0x00, %o2, %o3, %o4, %o5, %g2, %g3, %g4, %g5)
+	MIRROR_BLOCK(%o0, %o1, 0x20, %o2, %o3, %o4, %o5, %g2, %g3, %g4, %g5)
+	MIRROR_BLOCK(%o0, %o1, 0x40, %o2, %o3, %o4, %o5, %g2, %g3, %g4, %g5)
+	MIRROR_BLOCK(%o0, %o1, 0x60, %o2, %o3, %o4, %o5, %g2, %g3, %g4, %g5)
+	MIRROR_BLOCK(%o0, %o1, 0x80, %o2, %o3, %o4, %o5, %g2, %g3, %g4, %g5)
+	MIRROR_BLOCK(%o0, %o1, 0xa0, %o2, %o3, %o4, %o5, %g2, %g3, %g4, %g5)
+	MIRROR_BLOCK(%o0, %o1, 0xc0, %o2, %o3, %o4, %o5, %g2, %g3, %g4, %g5)
+	MIRROR_BLOCK(%o0, %o1, 0xe0, %o2, %o3, %o4, %o5, %g2, %g3, %g4, %g5)
+	subcc	%g1, 1, %g1
+	add	%o0, 0x100, %o0
+	bne	1b
+	 add	%o1, 0x100, %o1
+
+	retl
+	 nop
-- 
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