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#include <asm/blackfin.h>
33
34.align 2
35
36ENTRY(_insl)
37	P0 = R0;	/* P0 = port */
38	cli R3;
39	P1 = R1;	/* P1 = address */
40	P2 = R2;	/* P2 = count */
41	SSYNC;
42	LSETUP( .Llong_loop_s, .Llong_loop_e) LC0 = P2;
43.Llong_loop_s:  R0 = [P0];
44		[P1++] = R0;
45		NOP;
46.Llong_loop_e: 	NOP;
47	sti R3;
48	RTS;
49ENDPROC(_insl)
50
51ENTRY(_insw)
52	P0 = R0;	/* P0 = port */
53	cli R3;
54	P1 = R1;	/* P1 = address */
55	P2 = R2;	/* P2 = count */
56	SSYNC;
57	LSETUP( .Lword_loop_s, .Lword_loop_e) LC0 = P2;
58.Lword_loop_s:  R0 = W[P0];
59		W[P1++] = R0;
60		NOP;
61.Lword_loop_e: 	NOP;
62	sti R3;
63	RTS;
64ENDPROC(_insw)
65
66ENTRY(_insb)
67	P0 = R0;	/* P0 = port */
68	cli R3;
69	P1 = R1;	/* P1 = address */
70	P2 = R2;	/* P2 = count */
71	SSYNC;
72	LSETUP( .Lbyte_loop_s, .Lbyte_loop_e) LC0 = P2;
73.Lbyte_loop_s:  R0 = B[P0];
74		B[P1++] = R0;
75		NOP;
76.Lbyte_loop_e:  NOP;
77	sti R3;
78	RTS;
79ENDPROC(_insb)
80