1 files changed, 68 insertions, 0 deletions
diff --git a/arch/blackfin/lib/outs.S b/arch/blackfin/lib/outs.S
new file mode 100644
index 00000000..06a5e674
--- /dev/null
+++ b/arch/blackfin/lib/outs.S
@@ -0,0 +1,68 @@
+/*
+ * Implementation of outs{bwl} for BlackFin processors using zero overhead loops.
+ *
+ * Copyright 2005-2009 Analog Devices Inc.
+ *                2005 BuyWays BV
+ *                      Bas Vermeulen <bas@buyways.nl>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/linkage.h>
+
+.align 2
+
+ENTRY(_outsl)
+	CC = R2 == 0;
+	IF CC JUMP 1f;
+	P0 = R0;	/* P0 = port */
+	P1 = R1;	/* P1 = address */
+	P2 = R2;	/* P2 = count */
+
+	LSETUP( .Llong_loop_s, .Llong_loop_e) LC0 = P2;
+.Llong_loop_s: R0 = [P1++];
+.Llong_loop_e: [P0] = R0;
+1:	RTS;
+ENDPROC(_outsl)
+
+ENTRY(_outsw)
+	CC = R2 == 0;
+	IF CC JUMP 1f;
+	P0 = R0;	/* P0 = port */
+	P1 = R1;	/* P1 = address */
+	P2 = R2;	/* P2 = count */
+
+	LSETUP( .Lword_loop_s, .Lword_loop_e) LC0 = P2;
+.Lword_loop_s: R0 = W[P1++];
+.Lword_loop_e: W[P0] = R0;
+1:	RTS;
+ENDPROC(_outsw)
+
+ENTRY(_outsb)
+	CC = R2 == 0;
+	IF CC JUMP 1f;
+	P0 = R0;	/* P0 = port */
+	P1 = R1;	/* P1 = address */
+	P2 = R2;	/* P2 = count */
+
+	LSETUP( .Lbyte_loop_s, .Lbyte_loop_e) LC0 = P2;
+.Lbyte_loop_s: R0 = B[P1++];
+.Lbyte_loop_e: B[P0] = R0;
+1:	RTS;
+ENDPROC(_outsb)
+
+ENTRY(_outsw_8)
+	CC = R2 == 0;
+	IF CC JUMP 1f;
+	P0 = R0;	/* P0 = port */
+	P1 = R1;	/* P1 = address */
+	P2 = R2;	/* P2 = count */
+
+	LSETUP( .Lword8_loop_s, .Lword8_loop_e) LC0 = P2;
+.Lword8_loop_s: R1 = B[P1++];
+		R0 = B[P1++];
+		R0 = R0 << 8;
+		R0 = R0 + R1;
+.Lword8_loop_e: W[P0] = R0;
+1:	RTS;
+ENDPROC(_outsw_8)