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1/*
2 * File: arch/blackfin/lib/ins.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 ins{bwl} for BlackFin processors using zero overhead loops.
8 *
9 * Modified:
10 * Copyright 2004-2006 Analog Devices Inc.
11 * Copyright (C) 2005 Bas Vermeulen, BuyWays BV <bas@buyways.nl>
12 *
13 * Bugs: Enter bugs at http://blackfin.uclinux.org/
14 *
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2 of the License, or
18 * (at your option) any later version.
19 *
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
24 *
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, see the file COPYING, or write
27 * to the Free Software Foundation, Inc.,
28 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
29 */
30
31#include <linux/linkage.h>
32
33.align 2
34
35ENTRY(_insl)
36 P0 = R0; /* P0 = port */
37 cli R3;
38 P1 = R1; /* P1 = address */
39 P2 = R2; /* P2 = count */
40 SSYNC;
41 LSETUP( .Llong_loop_s, .Llong_loop_e) LC0 = P2;
42.Llong_loop_s: R0 = [P0];
43.Llong_loop_e: [P1++] = R0;
44 sti R3;
45 RTS;
46
47ENTRY(_insw)
48 P0 = R0; /* P0 = port */
49 cli R3;
50 P1 = R1; /* P1 = address */
51 P2 = R2; /* P2 = count */
52 SSYNC;
53 LSETUP( .Lword_loop_s, .Lword_loop_e) LC0 = P2;
54.Lword_loop_s: R0 = W[P0];
55.Lword_loop_e: W[P1++] = R0;
56 sti R3;
57 RTS;
58
59ENTRY(_insb)
60 P0 = R0; /* P0 = port */
61 cli R3;
62 P1 = R1; /* P1 = address */
63 P2 = R2; /* P2 = count */
64 SSYNC;
65 LSETUP( .Lbyte_loop_s, .Lbyte_loop_e) LC0 = P2;
66.Lbyte_loop_s: R0 = B[P0];
67.Lbyte_loop_e: B[P1++] = R0;
68 sti R3;
69 RTS;