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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