1/*
2 * File:         arch/blackfin/lib/outs.S
3 * Based on:
4 * Author:       Bas Vermeulen <bas@buyways.nl>
5 *
6 * Created:      Tue Mar 22 15:27:24 CEST 2005
7 * Description:  Implementation of outs{bwl} for BlackFin processors using zero overhead loops.
8 *
9 * Modified:     Copyright (C) 2005 Bas Vermeulen, BuyWays BV <bas@buyways.nl>
10 *               Copyright 2004-2006 Analog Devices Inc.
11 *
12 * Bugs:         Enter bugs at http://blackfin.uclinux.org/
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, see the file COPYING, or write
26 * to the Free Software Foundation, Inc.,
27 * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
28 */
29
30#include <linux/linkage.h>
31
32.align 2
33
34ENTRY(_outsl)
35	P0 = R0;	/* P0 = port */
36	P1 = R1;	/* P1 = address */
37	P2 = R2;	/* P2 = count */
38
39	LSETUP( .Llong_loop_s, .Llong_loop_e) LC0 = P2;
40.Llong_loop_s: R0 = [P1++];
41.Llong_loop_e: [P0] = R0;
42	RTS;
43ENDPROC(_outsl)
44
45ENTRY(_outsw)
46	P0 = R0;	/* P0 = port */
47	P1 = R1;	/* P1 = address */
48	P2 = R2;	/* P2 = count */
49
50	LSETUP( .Lword_loop_s, .Lword_loop_e) LC0 = P2;
51.Lword_loop_s: R0 = W[P1++];
52.Lword_loop_e: W[P0] = R0;
53	RTS;
54ENDPROC(_outsw)
55
56ENTRY(_outsb)
57	P0 = R0;	/* P0 = port */
58	P1 = R1;	/* P1 = address */
59	P2 = R2;	/* P2 = count */
60
61	LSETUP( .Lbyte_loop_s, .Lbyte_loop_e) LC0 = P2;
62.Lbyte_loop_s: R0 = B[P1++];
63.Lbyte_loop_e: B[P0] = R0;
64	RTS;
65ENDPROC(_outsb)
66