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79 lines
2.1 KiB
ArmAsm
79 lines
2.1 KiB
ArmAsm
/*
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* File: arch/blackfin/lib/outs.S
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* Based on:
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* Author: Bas Vermeulen <bas@buyways.nl>
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*
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* Created: Tue Mar 22 15:27:24 CEST 2005
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* Description: Implementation of outs{bwl} for BlackFin processors using zero overhead loops.
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*
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* Modified: Copyright (C) 2005 Bas Vermeulen, BuyWays BV <bas@buyways.nl>
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* Copyright 2004-2008 Analog Devices Inc.
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*
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* Bugs: Enter bugs at http://blackfin.uclinux.org/
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see the file COPYING, or write
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* to the Free Software Foundation, Inc.,
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <linux/linkage.h>
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.align 2
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ENTRY(_outsl)
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P0 = R0; /* P0 = port */
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P1 = R1; /* P1 = address */
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P2 = R2; /* P2 = count */
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LSETUP( .Llong_loop_s, .Llong_loop_e) LC0 = P2;
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.Llong_loop_s: R0 = [P1++];
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.Llong_loop_e: [P0] = R0;
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RTS;
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ENDPROC(_outsl)
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ENTRY(_outsw)
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P0 = R0; /* P0 = port */
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P1 = R1; /* P1 = address */
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P2 = R2; /* P2 = count */
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LSETUP( .Lword_loop_s, .Lword_loop_e) LC0 = P2;
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.Lword_loop_s: R0 = W[P1++];
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.Lword_loop_e: W[P0] = R0;
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RTS;
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ENDPROC(_outsw)
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ENTRY(_outsb)
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P0 = R0; /* P0 = port */
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P1 = R1; /* P1 = address */
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P2 = R2; /* P2 = count */
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LSETUP( .Lbyte_loop_s, .Lbyte_loop_e) LC0 = P2;
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.Lbyte_loop_s: R0 = B[P1++];
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.Lbyte_loop_e: B[P0] = R0;
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RTS;
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ENDPROC(_outsb)
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ENTRY(_outsw_8)
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P0 = R0; /* P0 = port */
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P1 = R1; /* P1 = address */
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P2 = R2; /* P2 = count */
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LSETUP( .Lword8_loop_s, .Lword8_loop_e) LC0 = P2;
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.Lword8_loop_s: R1 = B[P1++];
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R0 = B[P1++];
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R0 = R0 << 8;
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R0 = R0 + R1;
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.Lword8_loop_e: W[P0] = R0;
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RTS;
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ENDPROC(_outsw_8)
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