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