[444] | 1 | /* |
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| 2 | (C) Copyright IBM Corp. 2008 |
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| 3 | |
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| 4 | All rights reserved. |
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| 5 | |
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| 6 | Redistribution and use in source and binary forms, with or without |
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| 7 | modification, are permitted provided that the following conditions are met: |
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| 8 | |
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| 9 | * Redistributions of source code must retain the above copyright notice, |
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| 10 | 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 | * Neither the name of IBM nor the names of its contributors may be |
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| 15 | used to endorse or promote products derived from this software without |
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| 16 | specific prior written permission. |
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| 17 | |
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| 18 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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| 19 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 20 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 21 | ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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| 22 | LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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| 23 | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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| 24 | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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| 25 | INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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| 26 | CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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| 27 | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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| 28 | POSSIBILITY OF SUCH DAMAGE. |
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| 29 | */ |
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| 30 | |
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| 31 | /* Internal definitions for SPU timer library. */ |
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| 32 | #ifndef _SPU_TIMER_INTERNAL_H_ |
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| 33 | #define _SPU_TIMER_INTERNAL_H_ |
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| 34 | |
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| 35 | #include <spu_intrinsics.h> |
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| 36 | #include <spu_mfcio.h> |
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| 37 | #include <limits.h> |
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| 38 | #include <stdlib.h> |
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| 39 | |
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| 40 | #ifdef SPU_TIMER_DEBUG |
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| 41 | #include <stdio.h> |
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| 42 | #include <assert.h> |
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| 43 | #endif |
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| 44 | |
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| 45 | /* The timer state tells which list its on. */ |
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| 46 | typedef enum spu_timer_state |
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| 47 | { |
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| 48 | SPU_TIMER_FREE = 0, |
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| 49 | SPU_TIMER_ACTIVE = 1, |
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| 50 | SPU_TIMER_HANDLED = 2, |
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| 51 | SPU_TIMER_STOPPED = 3 |
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| 52 | } spu_timer_state_t; |
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| 53 | |
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| 54 | typedef struct spu_timer |
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| 55 | { |
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| 56 | int tmout __attribute__ ((__aligned__ (16))); /* Time until expiration (tb). */ |
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| 57 | int intvl __attribute__ ((__aligned__ (16))); /* Interval. */ |
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| 58 | int id __attribute__ ((__aligned__ (16))); |
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| 59 | spu_timer_state_t state __attribute__ ((__aligned__ (16))); |
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| 60 | void (*func) (int) __attribute__ ((__aligned__ (16))); /* Handler. */ |
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| 61 | struct spu_timer *next __attribute__ ((__aligned__ (16))); |
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| 62 | } spu_timer_t; |
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| 63 | |
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| 64 | |
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| 65 | /* Max decrementer value. */ |
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| 66 | #define DECR_MAX 0xFFFFFFFFU |
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| 67 | |
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| 68 | /* Arbitrary non-triggering value. */ |
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| 69 | #define CLOCK_START_VALUE 0x7FFFFFFF |
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| 70 | |
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| 71 | #define MIN_INTVL 1 |
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| 72 | #define MAX_INTVL INT_MAX |
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| 73 | |
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| 74 | /* Timers within 15 tics will expire together. */ |
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| 75 | #define TIMER_INTERVAL_WINDOW 15 |
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| 76 | |
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| 77 | /* Disables the decrementer and returns the saved event mask for a subsequent |
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| 78 | call to __enable_spu_decr. The decrementer interrupt is acknowledged in the |
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| 79 | flih when the event is received, but is required also as part of the |
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| 80 | procedure to stop the decrementer. */ |
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| 81 | static inline unsigned |
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| 82 | __disable_spu_decr (void) |
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| 83 | { |
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| 84 | unsigned mask = spu_readch (SPU_RdEventMask); |
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| 85 | spu_writech (SPU_WrEventMask, mask & ~MFC_DECREMENTER_EVENT); |
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| 86 | spu_writech (SPU_WrEventAck, MFC_DECREMENTER_EVENT); |
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| 87 | spu_sync_c (); |
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| 88 | return mask; |
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| 89 | } |
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| 90 | |
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| 91 | /* Writes and enables the decrementer, along with the given event mask. */ |
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| 92 | static inline void |
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| 93 | __enable_spu_decr (int val, unsigned mask) |
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| 94 | { |
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| 95 | spu_writech (SPU_WrDec, (val)); |
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| 96 | spu_writech (SPU_WrEventMask, mask | MFC_DECREMENTER_EVENT); |
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| 97 | spu_sync_c (); |
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| 98 | } |
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| 99 | |
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| 100 | /* These are shared between modules but are not inlined, to save space. */ |
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| 101 | extern void __spu_timer_start (int id, int reset); |
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| 102 | extern void __reset_spu_decr (int val); |
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| 103 | |
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| 104 | /* The timers. */ |
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| 105 | extern spu_timer_t __spu_timers[]; |
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| 106 | |
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| 107 | /* Active timer list. */ |
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| 108 | extern spu_timer_t *__spu_timers_active; |
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| 109 | |
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| 110 | /* Stopped (allocated) timer list. */ |
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| 111 | extern spu_timer_t *__spu_timers_stopped; |
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| 112 | |
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| 113 | /* List of timers being handled. */ |
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| 114 | extern spu_timer_t *__spu_timers_handled; |
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| 115 | |
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| 116 | /* Bitmask of available timers. */ |
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| 117 | extern unsigned __spu_timers_avail; |
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| 118 | |
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| 119 | /* The software managed timebase value. */ |
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| 120 | extern volatile uint64_t __spu_tb_val; |
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| 121 | |
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| 122 | /* Timeout value of the current interval. */ |
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| 123 | extern volatile int __spu_tb_timeout; |
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| 124 | |
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| 125 | /* Clock start count (clock is running if >0). */ |
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| 126 | extern volatile unsigned __spu_clock_startcnt; |
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| 127 | |
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| 128 | /* Saved interrupt state from clock_start. */ |
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| 129 | extern volatile unsigned __spu_clock_state_was_enabled; |
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| 130 | |
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| 131 | #define __likely(_c) __builtin_expect((_c), 1) |
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| 132 | #define __unlikely(_c) __builtin_expect((_c), 0) |
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| 133 | |
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| 134 | #define ABORT() \ |
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| 135 | {\ |
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| 136 | fprintf(stderr, "Internal error, aborting: %s:%d\n", __FILE__, __LINE__);\ |
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| 137 | assert(0);\ |
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| 138 | } |
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| 139 | |
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| 140 | #endif |
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