projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| f21663b5 WN |
1 | /*- |
| 2 | * Copyright (c) 1990 The Regents of the University of California. | |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * This code is derived from software contributed to Berkeley by | |
| 6 | * William Jolitz. | |
| 7 | * | |
| 8 | * %sccs.include.386.c% | |
| 9 | * | |
| 10 | * @(#)clock.c 5.1 (Berkeley) %G% | |
| 11 | */ | |
| 12 | ||
| 13 | /* | |
| 14 | * Primitive clock interrupt routines. | |
| 15 | */ | |
| 16 | #include "param.h" | |
| 17 | #include "time.h" | |
| 18 | #include "kernel.h" | |
| 19 | #include "icu.h" | |
| 20 | ||
| 21 | startrtclock() { | |
| 22 | ||
| 23 | /* initialize 8253 clock */ | |
| 24 | outb (0x43, 0x36); | |
| 25 | outb (0x40, 1193182/60); | |
| 26 | outb (0x40, (1193182/60)/256); | |
| 27 | } | |
| 28 | ||
| 29 | clkreld() { | |
| 30 | pg("clkreld"); | |
| 31 | } | |
| 32 | ||
| 33 | /* | |
| 34 | * Initialze the time of day register, based on the time base which is, e.g. | |
| 35 | * from a filesystem. | |
| 36 | */ | |
| 37 | inittodr(base) | |
| 38 | time_t base; | |
| 39 | { | |
| 40 | ||
| 41 | time.tv_sec = base; | |
| 42 | } | |
| 43 | ||
| 44 | /* | |
| 45 | * Restart the clock. | |
| 46 | */ | |
| 47 | resettodr() | |
| 48 | { | |
| 49 | } | |
| 50 | ||
| 51 | enablertclock() { | |
| 52 | INTREN(IRQ0); | |
| 53 | splnone(); | |
| 54 | } |