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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2 | pj | 1 | /* Project: OSLib |
| 2 | * Description: The OS Construction Kit |
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| 3 | * Date: 1.6.2000 |
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| 4 | * Idea by: Luca Abeni & Gerardo Lamastra |
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| 5 | * |
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| 6 | * OSLib is an SO project aimed at developing a common, easy-to-use |
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| 7 | * low-level infrastructure for developing OS kernels and Embedded |
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| 8 | * Applications; it partially derives from the HARTIK project but it |
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| 9 | * currently is independently developed. |
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| 10 | * |
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| 11 | * OSLib is distributed under GPL License, and some of its code has |
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| 12 | * been derived from the Linux kernel source; also some important |
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| 13 | * ideas come from studying the DJGPP go32 extender. |
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| 14 | * |
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| 15 | * We acknowledge the Linux Community, Free Software Foundation, |
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| 16 | * D.J. Delorie and all the other developers who believe in the |
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| 17 | * freedom of software and ideas. |
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| 18 | * |
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| 19 | * For legalese, check out the included GPL license. |
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| 20 | */ |
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| 21 | |||
| 22 | /* Time management code: ll_getttime() */ |
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| 23 | |||
| 120 | giacomo | 24 | /* Added Advanced Timer Code |
| 25 | * |
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| 26 | * Date: 8.4.2003 |
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| 27 | * Author: Giacomo Guidi <giacomo@gandalf.sssup.it> |
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| 28 | * |
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| 29 | */ |
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| 30 | |||
| 1621 | fabio | 31 | #include <arch/i386/stdlib.h> |
| 2 | pj | 32 | #include <ll/i386/pit.h> |
| 33 | #include <ll/i386/error.h> |
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| 34 | #include <ll/i386/mem.h> |
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| 131 | giacomo | 35 | #include <ll/i386/advtimer.h> |
| 2 | pj | 36 | #include <ll/sys/ll/ll-data.h> |
| 37 | #include <ll/sys/ll/ll-func.h> |
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| 38 | #include <ll/sys/ll/time.h> |
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| 39 | |||
| 40 | /* These are for the EXECT and TICK modes */ |
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| 40 | pj | 41 | extern DWORD ticksize; /* From init.c */ |
| 42 | extern struct timespec actTime; /* From event.c */ |
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| 43 | extern WORD pit_time_const; /* From init.c */ |
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| 44 | extern DWORD timermode; /* From init.c */ |
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| 2 | pj | 45 | |
| 46 | /* These two are for the NEW algorithm */ |
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| 40 | pj | 47 | extern WORD lastTime; /* From event.c */ |
| 48 | extern struct pitspec globalCounter; /* From event.c */ |
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| 2 | pj | 49 | extern BYTE frc; |
| 50 | extern int activeEvent; |
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| 650 | giacomo | 51 | extern unsigned char use_tsc; |
| 2 | pj | 52 | |
| 53 | FILE(Time); |
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| 54 | |||
| 55 | TIME ll_gettime(int mode, struct timespec *tsres) |
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| 56 | { |
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| 305 | giacomo | 57 | |
| 619 | mauro | 58 | if (!use_tsc) { |
| 305 | giacomo | 59 | |
| 619 | mauro | 60 | DWORD res, tc; |
| 61 | BYTE isr; |
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| 62 | struct timespec tmp; |
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| 2 | pj | 63 | |
| 40 | pj | 64 | #if 1 |
| 619 | mauro | 65 | if (activeEvent) { |
| 66 | if (tsres != NULL) { |
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| 67 | PITSPEC2TIMESPEC(&globalCounter, tsres); |
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| 68 | } else { |
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| 69 | struct timespec tmp; |
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| 2 | pj | 70 | |
| 619 | mauro | 71 | PITSPEC2TIMESPEC(&globalCounter, &tmp); |
| 72 | return TIMESPEC2USEC(&tmp); |
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| 73 | } |
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| 74 | return TIMESPEC2USEC(tsres); |
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| 75 | } |
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| 40 | pj | 76 | #endif |
| 77 | |||
| 619 | mauro | 78 | if (mode == TIME_PTICK) { |
| 79 | if (timermode != LL_PERIODIC) { |
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| 80 | return 0; |
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| 81 | } |
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| 82 | res = TIMESPEC2USEC(&actTime); |
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| 83 | if (tsres != NULL) { |
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| 84 | memcpy(tsres, &actTime, sizeof(struct timespec)); |
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| 85 | } |
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| 86 | return res; |
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| 40 | pj | 87 | } |
| 2 | pj | 88 | |
| 619 | mauro | 89 | if (mode == TIME_NEW) { |
| 90 | WORD tmp; |
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| 40 | pj | 91 | |
| 619 | mauro | 92 | tmp = pit_read(frc); |
| 93 | ADDPITSPEC((WORD)(lastTime - tmp), &globalCounter); |
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| 94 | lastTime = tmp; |
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| 95 | if (tsres != NULL) { |
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| 96 | PITSPEC2TIMESPEC(&globalCounter, tsres); |
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| 40 | pj | 97 | } |
| 619 | mauro | 98 | return (PITSPEC2USEC(&globalCounter)); |
| 99 | } |
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| 2 | pj | 100 | |
| 619 | mauro | 101 | if (mode == TIME_EXACT) { |
| 102 | if (timermode == LL_PERIODIC) { |
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| 103 | memcpy(&tmp, &actTime, sizeof(struct timespec)); |
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| 104 | /* How much time has elapsed |
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| 105 | * from the last Tick Boundary? |
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| 106 | */ |
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| 107 | tc = pit_read(0); |
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| 108 | if (tc > pit_time_const) { |
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| 109 | error("LL Time Panic!!!\n"); |
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| 110 | ll_abort(1); |
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| 111 | } |
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| 112 | res = pit_time_const - tc; |
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| 113 | res *= ticksize; |
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| 114 | res /= pit_time_const; |
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| 2 | pj | 115 | |
| 619 | mauro | 116 | /* Detect tick boundary and adjust the time... */ |
| 117 | outp(0x20, 0x0A); |
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| 118 | isr = inp(0x20); |
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| 119 | if ((isr & 1) && res < ((8*ticksize)/10)){ |
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| 120 | /* |
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| 121 | res += ticksize; |
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| 122 | ADDNANO2TIMESPEC(ticksize * 1000, &tmp); |
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| 123 | */ |
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| 124 | res = ticksize; |
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| 125 | } |
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| 2 | pj | 126 | |
| 619 | mauro | 127 | /* Sum the Tick time... */ |
| 128 | ADDNANO2TIMESPEC(res * 1000, &tmp); |
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| 129 | res += TIMESPEC2USEC(&actTime); |
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| 130 | |||
| 131 | if (tsres != NULL) { |
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| 132 | memcpy(tsres, &tmp, sizeof(struct timespec)); |
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| 133 | } |
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| 134 | return res; |
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| 135 | } else { |
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| 136 | return 0; |
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| 40 | pj | 137 | } |
| 619 | mauro | 138 | } |
| 139 | return 0; |
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| 140 | } else { |
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| 141 | if (tsres != NULL) { |
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| 142 | ll_read_timespec(tsres); |
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| 143 | return TIMESPEC2USEC(tsres); |
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| 40 | pj | 144 | } else { |
| 619 | mauro | 145 | struct timespec tmp; |
| 146 | |||
| 147 | ll_read_timespec(&tmp); |
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| 148 | return TIMESPEC2USEC(&tmp); |
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| 40 | pj | 149 | } |
| 2 | pj | 150 | } |
| 151 | } |