nkeynes@265 | 1 | /**
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nkeynes@561 | 2 | * $Id$
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nkeynes@265 | 3 | *
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nkeynes@265 | 4 | * Simple implementation of one-shot timers. Effectively this allows IO
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nkeynes@265 | 5 | * devices to wait until a particular time before completing. We expect
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nkeynes@265 | 6 | * there to be at least half a dozen or so continually scheduled events
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nkeynes@265 | 7 | * (TMU and PVR2), peaking around 20+.
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nkeynes@265 | 8 | *
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nkeynes@265 | 9 | * Copyright (c) 2005 Nathan Keynes.
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nkeynes@265 | 10 | *
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nkeynes@265 | 11 | * This program is free software; you can redistribute it and/or modify
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nkeynes@265 | 12 | * it under the terms of the GNU General Public License as published by
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nkeynes@265 | 13 | * the Free Software Foundation; either version 2 of the License, or
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nkeynes@265 | 14 | * (at your option) any later version.
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nkeynes@265 | 15 | *
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nkeynes@265 | 16 | * This program is distributed in the hope that it will be useful,
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nkeynes@265 | 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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nkeynes@265 | 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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nkeynes@265 | 19 | * GNU General Public License for more details.
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nkeynes@265 | 20 | */
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nkeynes@265 | 21 |
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nkeynes@265 | 22 | #include "dream.h"
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nkeynes@265 | 23 |
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nkeynes@265 | 24 | #define NOT_SCHEDULED 0xFFFFFFFF /* Sentinel value */
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nkeynes@265 | 25 |
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nkeynes@265 | 26 |
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nkeynes@265 | 27 | typedef void (*event_func_t)(int eventid);
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nkeynes@265 | 28 |
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nkeynes@265 | 29 | /**
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nkeynes@265 | 30 | * Register the callback to be associated with the given event ID.
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nkeynes@265 | 31 | * Note: These should be registered at init time and never changed.
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nkeynes@265 | 32 | */
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nkeynes@265 | 33 | void register_event_callback( int eventid, event_func_t func );
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nkeynes@265 | 34 |
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nkeynes@265 | 35 | /**
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nkeynes@265 | 36 | * Schedule a new pending event.
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nkeynes@265 | 37 | * @param eventid Unique ID identifying the event in question (used to remove it
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nkeynes@265 | 38 | * at a later time). If the eventid is scheduled more than once, only the lastest
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nkeynes@265 | 39 | * schedule for that ID will be valid.
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nkeynes@265 | 40 | * @param nanosecs Nanoseconds from the current SH4 time at which the event
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nkeynes@265 | 41 | * should occur.
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nkeynes@265 | 42 | */
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nkeynes@265 | 43 | void event_schedule( int eventid, uint32_t nanosecs );
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nkeynes@265 | 44 |
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nkeynes@265 | 45 | /**
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nkeynes@265 | 46 | * Schedule a long-duration pending event
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nkeynes@265 | 47 | */
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nkeynes@265 | 48 | void event_schedule_long( int eventid, uint32_t seconds, uint32_t nanosecs );
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nkeynes@265 | 49 |
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nkeynes@265 | 50 | /**
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nkeynes@265 | 51 | * Remove a previously created event without triggering it. This is usually
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nkeynes@265 | 52 | * only used when an operation is aborted.
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nkeynes@265 | 53 | */
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nkeynes@265 | 54 | void event_cancel( int eventid );
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nkeynes@265 | 55 |
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nkeynes@265 | 56 | /**
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nkeynes@265 | 57 | * Return the slice cycle time of the next event, or NOT_SCHEDULED
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nkeynes@265 | 58 | * if no events are scheduled for this time slice.
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nkeynes@265 | 59 | */
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nkeynes@265 | 60 | uint32_t event_get_next_time();
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nkeynes@265 | 61 |
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nkeynes@265 | 62 | /**
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nkeynes@265 | 63 | * Execute the event on the top of the queue, and remove it.
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nkeynes@265 | 64 | */
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nkeynes@265 | 65 | void event_execute();
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nkeynes@265 | 66 |
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nkeynes@265 | 67 | #define MAX_EVENT_ID 128
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nkeynes@265 | 68 |
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nkeynes@265 | 69 | /* Events 1..96 are defined as the corresponding ASIC events. */
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nkeynes@265 | 70 |
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nkeynes@265 | 71 |
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