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| Rev | Author | Line No. | Line |
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| 510 | jermar | 1 | /* |
| 2071 | jermar | 2 | * Copyright (c) 2005 Jakub Jermar |
| 510 | jermar | 3 | * All rights reserved. |
| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 1888 | jermar | 29 | /** @addtogroup genericconsole |
| 1702 | cejka | 30 | * @{ |
| 31 | */ |
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| 32 | /** @file |
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| 33 | */ |
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| 34 | |||
| 1888 | jermar | 35 | #ifndef KERN_CHARDEV_H_ |
| 36 | #define KERN_CHARDEV_H_ |
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| 510 | jermar | 37 | |
| 38 | #include <arch/types.h> |
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| 39 | #include <synch/waitq.h> |
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| 40 | #include <synch/spinlock.h> |
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| 41 | |||
| 4346 | svoboda | 42 | #define INDEV_BUFLEN 512 |
| 510 | jermar | 43 | |
| 4346 | svoboda | 44 | struct indev; |
| 2089 | decky | 45 | |
| 4346 | svoboda | 46 | /* Input character device operations interface. */ |
| 2089 | decky | 47 | typedef struct { |
| 2106 | jermar | 48 | /** Read character directly from device, assume interrupts disabled. */ |
| 4348 | svoboda | 49 | wchar_t (* poll)(struct indev *); |
| 4346 | svoboda | 50 | } indev_operations_t; |
| 510 | jermar | 51 | |
| 52 | /** Character input device. */ |
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| 4346 | svoboda | 53 | typedef struct indev { |
| 575 | palkovsky | 54 | char *name; |
| 4346 | svoboda | 55 | waitq_t wq; |
| 575 | palkovsky | 56 | |
| 2106 | jermar | 57 | /** Protects everything below. */ |
| 4346 | svoboda | 58 | SPINLOCK_DECLARE(lock); |
| 4348 | svoboda | 59 | wchar_t buffer[INDEV_BUFLEN]; |
| 510 | jermar | 60 | count_t counter; |
| 4346 | svoboda | 61 | |
| 62 | /** Implementation of indev operations. */ |
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| 63 | indev_operations_t *op; |
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| 510 | jermar | 64 | index_t index; |
| 575 | palkovsky | 65 | void *data; |
| 4346 | svoboda | 66 | } indev_t; |
| 510 | jermar | 67 | |
| 68 | |||
| 4346 | svoboda | 69 | struct outdev; |
| 70 | |||
| 71 | /* Output character device operations interface. */ |
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| 72 | typedef struct { |
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| 73 | /** Write character to output. */ |
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| 4348 | svoboda | 74 | void (* write)(struct outdev *, wchar_t, bool); |
| 4346 | svoboda | 75 | } outdev_operations_t; |
| 76 | |||
| 77 | /** Character input device. */ |
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| 78 | typedef struct outdev { |
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| 79 | char *name; |
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| 80 | |||
| 81 | /** Protects everything below. */ |
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| 82 | SPINLOCK_DECLARE(lock); |
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| 83 | |||
| 84 | /** Implementation of outdev operations. */ |
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| 85 | outdev_operations_t *op; |
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| 86 | void *data; |
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| 87 | } outdev_t; |
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| 88 | |||
| 89 | extern void indev_initialize(char *name, indev_t *indev, |
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| 90 | indev_operations_t *op); |
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| 4348 | svoboda | 91 | extern void indev_push_character(indev_t *indev, wchar_t ch); |
| 92 | extern wchar_t indev_pop_character(indev_t *indev); |
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| 4346 | svoboda | 93 | |
| 94 | extern void outdev_initialize(char *name, outdev_t *outdev, |
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| 95 | outdev_operations_t *op); |
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| 96 | |||
| 4348 | svoboda | 97 | extern bool check_poll(indev_t *indev); |
| 98 | |||
| 1888 | jermar | 99 | #endif /* KERN_CHARDEV_H_ */ |
| 1702 | cejka | 100 | |
| 1888 | jermar | 101 | /** @} |
| 1702 | cejka | 102 | */ |