Rev 1618 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2 | pj | 1 | /* Project: OSLib |
| 2 | * Description: The OS Construction Kit |
||
| 3 | * Date: 1.6.2000 |
||
| 4 | * Idea by: Luca Abeni & Gerardo Lamastra |
||
| 5 | * |
||
| 6 | * OSLib is an SO project aimed at developing a common, easy-to-use |
||
| 7 | * low-level infrastructure for developing OS kernels and Embedded |
||
| 8 | * Applications; it partially derives from the HARTIK project but it |
||
| 9 | * currently is independently developed. |
||
| 10 | * |
||
| 11 | * OSLib is distributed under GPL License, and some of its code has |
||
| 12 | * been derived from the Linux kernel source; also some important |
||
| 13 | * ideas come from studying the DJGPP go32 extender. |
||
| 14 | * |
||
| 15 | * We acknowledge the Linux Community, Free Software Foundation, |
||
| 16 | * D.J. Delorie and all the other developers who believe in the |
||
| 17 | * freedom of software and ideas. |
||
| 18 | * |
||
| 19 | * For legalese, check out the included GPL license. |
||
| 20 | */ |
||
| 21 | |||
| 22 | /* Time management code: ll_getttime() */ |
||
| 23 | |||
| 120 | giacomo | 24 | /* Added Advanced Timer Code |
| 25 | * |
||
| 26 | * Date: 8.4.2003 |
||
| 27 | * Author: Giacomo Guidi <giacomo@gandalf.sssup.it> |
||
| 28 | * |
||
| 29 | */ |
||
| 30 | |||
| 1621 | fabio | 31 | #include <arch/i386/stdlib.h> |
| 2 | pj | 32 | #include <ll/i386/pit.h> |
| 33 | #include <ll/i386/error.h> |
||
| 34 | #include <ll/i386/mem.h> |
||
| 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> |
||
| 38 | #include <ll/sys/ll/time.h> |
||
| 39 | |||
| 40 | /* These are for the EXECT and TICK modes */ |
||
| 40 | pj | 41 | extern DWORD ticksize; /* From init.c */ |
| 42 | extern struct timespec actTime; /* From event.c */ |
||
| 43 | extern WORD pit_time_const; /* From init.c */ |
||
| 44 | extern DWORD timermode; /* From init.c */ |
||
| 2 | pj | 45 | |
| 46 | /* These two are for the NEW algorithm */ |
||
| 40 | pj | 47 | extern WORD lastTime; /* From event.c */ |
| 48 | extern struct pitspec globalCounter; /* From event.c */ |
||
| 2 | pj | 49 | extern BYTE frc; |
| 50 | extern int activeEvent; |
||
| 650 | giacomo | 51 | extern unsigned char use_tsc; |
| 2 | pj | 52 | |
| 53 | FILE(Time); |
||
| 54 | |||
| 55 | TIME ll_gettime(int mode, struct timespec *tsres) |
||
| 56 | { |
||
| 305 | giacomo | 57 | |
| 619 | mauro | 58 | if (!use_tsc) { |
| 305 | giacomo | 59 | |
| 619 | mauro | 60 | DWORD res, tc; |
| 61 | BYTE isr; |
||
| 62 | struct timespec tmp; |
||
| 2 | pj | 63 | |
| 40 | pj | 64 | #if 1 |
| 619 | mauro | 65 | if (activeEvent) { |
| 66 | if (tsres != NULL) { |
||
| 67 | PITSPEC2TIMESPEC(&globalCounter, tsres); |
||
| 68 | } else { |
||
| 69 | struct timespec tmp; |
||
| 2 | pj | 70 | |
| 619 | mauro | 71 | PITSPEC2TIMESPEC(&globalCounter, &tmp); |
| 72 | return TIMESPEC2USEC(&tmp); |
||
| 73 | } |
||
| 74 | return TIMESPEC2USEC(tsres); |
||
| 75 | } |
||
| 40 | pj | 76 | #endif |
| 77 | |||
| 619 | mauro | 78 | if (mode == TIME_PTICK) { |
| 79 | if (timermode != LL_PERIODIC) { |
||
| 80 | return 0; |
||
| 81 | } |
||
| 82 | res = TIMESPEC2USEC(&actTime); |
||
| 83 | if (tsres != NULL) { |
||
| 84 | memcpy(tsres, &actTime, sizeof(struct timespec)); |
||
| 85 | } |
||
| 86 | return res; |
||
| 40 | pj | 87 | } |
| 2 | pj | 88 | |
| 619 | mauro | 89 | if (mode == TIME_NEW) { |
| 90 | WORD tmp; |
||
| 40 | pj | 91 | |
| 619 | mauro | 92 | tmp = pit_read(frc); |
| 93 | ADDPITSPEC((WORD)(lastTime - tmp), &globalCounter); |
||
| 94 | lastTime = tmp; |
||
| 95 | if (tsres != NULL) { |
||
| 96 | PITSPEC2TIMESPEC(&globalCounter, tsres); |
||
| 40 | pj | 97 | } |
| 619 | mauro | 98 | return (PITSPEC2USEC(&globalCounter)); |
| 99 | } |
||
| 2 | pj | 100 | |
| 619 | mauro | 101 | if (mode == TIME_EXACT) { |
| 102 | if (timermode == LL_PERIODIC) { |
||
| 103 | memcpy(&tmp, &actTime, sizeof(struct timespec)); |
||
| 104 | /* How much time has elapsed |
||
| 105 | * from the last Tick Boundary? |
||
| 106 | */ |
||
| 107 | tc = pit_read(0); |
||
| 108 | if (tc > pit_time_const) { |
||
| 109 | error("LL Time Panic!!!\n"); |
||
| 110 | ll_abort(1); |
||
| 111 | } |
||
| 112 | res = pit_time_const - tc; |
||
| 113 | res *= ticksize; |
||
| 114 | res /= pit_time_const; |
||
| 2 | pj | 115 | |
| 619 | mauro | 116 | /* Detect tick boundary and adjust the time... */ |
| 117 | outp(0x20, 0x0A); |
||
| 118 | isr = inp(0x20); |
||
| 119 | if ((isr & 1) && res < ((8*ticksize)/10)){ |
||
| 120 | /* |
||
| 121 | res += ticksize; |
||
| 122 | ADDNANO2TIMESPEC(ticksize * 1000, &tmp); |
||
| 123 | */ |
||
| 124 | res = ticksize; |
||
| 125 | } |
||
| 2 | pj | 126 | |
| 619 | mauro | 127 | /* Sum the Tick time... */ |
| 128 | ADDNANO2TIMESPEC(res * 1000, &tmp); |
||
| 129 | res += TIMESPEC2USEC(&actTime); |
||
| 130 | |||
| 131 | if (tsres != NULL) { |
||
| 132 | memcpy(tsres, &tmp, sizeof(struct timespec)); |
||
| 133 | } |
||
| 134 | return res; |
||
| 135 | } else { |
||
| 136 | return 0; |
||
| 40 | pj | 137 | } |
| 619 | mauro | 138 | } |
| 139 | return 0; |
||
| 140 | } else { |
||
| 141 | if (tsres != NULL) { |
||
| 142 | ll_read_timespec(tsres); |
||
| 143 | return TIMESPEC2USEC(tsres); |
||
| 40 | pj | 144 | } else { |
| 619 | mauro | 145 | struct timespec tmp; |
| 146 | |||
| 147 | ll_read_timespec(&tmp); |
||
| 148 | return TIMESPEC2USEC(&tmp); |
||
| 40 | pj | 149 | } |
| 2 | pj | 150 | } |
| 151 | } |