From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001
From: André Fabian Silva Delgado <emulatorman@parabola.nu>
Date: Wed, 5 Aug 2015 17:04:01 -0300
Subject: Initial import

---
 arch/m32r/mm/page.S | 82 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 arch/m32r/mm/page.S

(limited to 'arch/m32r/mm/page.S')

diff --git a/arch/m32r/mm/page.S b/arch/m32r/mm/page.S
new file mode 100644
index 000000000..a2e9367db
--- /dev/null
+++ b/arch/m32r/mm/page.S
@@ -0,0 +1,82 @@
+/*
+ *  linux/arch/m32r/mm/page.S
+ *
+ *  Clear/Copy page with CPU
+ *
+ *  Copyright (C) 2004  The Free Software Initiative of Japan
+ *
+ *  Written by Niibe Yutaka
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ */
+	.text
+	.global	copy_page
+	/*
+	 * copy_page (to, from)
+	 *
+	 * PAGE_SIZE = 4096-byte
+	 * Cache line = 16-byte
+	 * 16 * 256
+	 */
+	.align	4
+copy_page:
+	ldi	r2, #255
+	ld	r3, @r0		/* cache line allocate */
+	ld	r4, @r1+
+	ld	r5, @r1+
+	ld	r6, @r1+
+	ld	r7, @r1+
+	.fillinsn
+0:
+	st	r4, @r0
+	st	r5, @+r0
+	st	r6, @+r0
+	st	r7, @+r0
+	ld	r4, @r1+
+	addi	r0, #4
+	ld	r5, @r1+
+	ld	r6, @r1+
+	ld	r7, @r1+
+	ld	r3, @r0		/* cache line allocate */
+	addi	r2, #-1
+	bnez	r2, 0b
+
+	st	r4, @r0
+	st	r5, @+r0
+	st	r6, @+r0
+	st	r7, @+r0
+	jmp	r14
+
+	.text
+	.global	clear_page
+	/*
+	 * clear_page (to)
+	 *
+	 * PAGE_SIZE = 4096-byte
+	 * Cache line = 16-byte
+	 * 16 * 256
+	 */
+	.align	4
+clear_page:
+	ldi	r2, #255
+	ldi	r4, #0
+	ld	r3, @r0		/* cache line allocate */
+	.fillinsn
+0:
+	st	r4, @r0
+	st	r4, @+r0
+	st	r4, @+r0
+	st	r4, @+r0
+	addi	r0, #4
+	ld	r3, @r0		/* cache line allocate */
+	addi	r2, #-1
+	bnez	r2, 0b
+
+	st	r4, @r0
+	st	r4, @+r0
+	st	r4, @+r0
+	st	r4, @+r0
+	jmp	r14
-- 
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