| Daniel Hellstrom | 9d7c6b2 | 2008-03-28 09:47:00 +0100 | [diff] [blame] | 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 | */ |
| 56 | void udelay(unsigned long usec) |
| 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 | /* ------------------------------------------------------------------------- */ |