projects / people / ms / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| c2f02da2 DH |
1 | /* |
| 2 | * (C) Copyright 2000, 2001 | |
| 3 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
| 4 | * | |
| 5 | * (C) Copyright 2007 | |
| 6 | * Daniel Hellstrom, Gaisler Research, daniel@gaisler.com. | |
| 7 | * | |
| 8 | * See file CREDITS for list of people who contributed to this | |
| 9 | * project. | |
| 10 | * | |
| 11 | * This program is free software; you can redistribute it and/or | |
| 12 | * modify it under the terms of the GNU General Public License as | |
| 13 | * published by the Free Software Foundation; either version 2 of | |
| 14 | * the License, or (at your option) any later version. | |
| 15 | * | |
| 16 | * This program is distributed in the hope that it will be useful, | |
| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 19 | * GNU General Public License for more details. | |
| 20 | * | |
| 21 | * You should have received a copy of the GNU General Public License | |
| 22 | * along with this program; if not, write to the Free Software | |
| 23 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
| 24 | * MA 02111-1307 USA | |
| 25 | */ | |
| 26 | ||
| 27 | #include <common.h> | |
| 28 | ||
| 29 | /* Implemented by SPARC CPUs */ | |
| 30 | extern void cpu_wait_ticks(unsigned long ticks); | |
| 31 | extern unsigned long cpu_usec2ticks(unsigned long usec); | |
| 32 | extern unsigned long cpu_ticks2usec(unsigned long ticks); | |
| 33 | ||
| 34 | /* ------------------------------------------------------------------------- */ | |
| 35 | ||
| 36 | void wait_ticks(unsigned long ticks) | |
| 37 | { | |
| 38 | cpu_wait_ticks(ticks); | |
| 39 | } | |
| 40 | ||
| 41 | /* | |
| 42 | * This function is intended for SHORT delays only. | |
| 43 | */ | |
| 44 | unsigned long usec2ticks(unsigned long usec) | |
| 45 | { | |
| 46 | return cpu_usec2ticks(usec); | |
| 47 | } | |
| 48 | ||
| 49 | /* ------------------------------------------------------------------------- */ | |
| 50 | ||
| 51 | /* | |
| 52 | * We implement the delay by converting the delay (the number of | |
| 53 | * microseconds to wait) into a number of time base ticks; then we | |
| 54 | * watch the time base until it has incremented by that amount. | |
| 55 | */ | |
| 3eb90bad | 56 | void __udelay(unsigned long usec) |
| c2f02da2 DH |
57 | { |
| 58 | ulong ticks = usec2ticks(usec); | |
| 59 | ||
| 60 | wait_ticks(ticks); | |
| 61 | } | |
| 62 | ||
| 63 | /* ------------------------------------------------------------------------- */ | |
| 64 | ||
| 65 | unsigned long ticks2usec(unsigned long ticks) | |
| 66 | { | |
| 67 | return cpu_ticks2usec(ticks); | |
| 68 | } | |
| 69 | ||
| 70 | /* ------------------------------------------------------------------------- */ | |
| 71 | ||
| 72 | int init_timebase(void) | |
| 73 | { | |
| 74 | ||
| 75 | return (0); | |
| 76 | } | |
| 77 | ||
| 78 | /* ------------------------------------------------------------------------- */ |