projects / deliverable / linux.git / blame
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|---|---|---|
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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> | |
| 59069676 | 10 | * Copyright 2004-2008 Analog Devices Inc. |
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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 | ||
| 34 | ENTRY(_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; | |
| 51be24c3 | 43 | ENDPROC(_outsl) |
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44 | |
| 45 | ENTRY(_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; | |
| 51be24c3 | 54 | ENDPROC(_outsw) |
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55 | |
| 56 | ENTRY(_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; | |
| 51be24c3 | 65 | ENDPROC(_outsb) |
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66 | |
| 67 | ENTRY(_outsw_8) | |
| 68 | P0 = R0; /* P0 = port */ | |
| 69 | P1 = R1; /* P1 = address */ | |
| 70 | P2 = R2; /* P2 = count */ | |
| 71 | ||
| 72 | LSETUP( .Lword8_loop_s, .Lword8_loop_e) LC0 = P2; | |
| 73 | .Lword8_loop_s: R1 = B[P1++]; | |
| 74 | R0 = B[P1++]; | |
| 75 | R0 = R0 << 8; | |
| 76 | R0 = R0 + R1; | |
| 77 | .Lword8_loop_e: W[P0] = R0; | |
| 78 | RTS; | |
| ca56d9aa | 79 | ENDPROC(_outsw_8) |