projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 4182de9e LFT |
1 | /* Copyright Altera Corporation (C) 2014. All rights reserved. |
| 2 | * | |
| 3 | * This program is free software; you can redistribute it and/or modify | |
| 4 | * it under the terms of the GNU General Public License, version 2, | |
| 5 | * as published by the Free Software Foundation. | |
| 6 | * | |
| 7 | * This program is distributed in the hope that it will be useful, | |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 10 | * GNU General Public License for more details. | |
| 11 | * | |
| 12 | * You should have received a copy of the GNU General Public License | |
| 13 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 14 | * | |
| 15 | */ | |
| 16 | ||
| 17 | #include <linux/module.h> | |
| 18 | #include <asm/delay.h> | |
| 19 | #include <asm/param.h> | |
| 20 | #include <asm/processor.h> | |
| 21 | #include <asm/timex.h> | |
| 22 | ||
| 23 | void __delay(unsigned long cycles) | |
| 24 | { | |
| 25 | cycles_t start = get_cycles(); | |
| 26 | ||
| 27 | while ((get_cycles() - start) < cycles) | |
| 28 | cpu_relax(); | |
| 29 | } | |
| 30 | EXPORT_SYMBOL(__delay); | |
| 31 | ||
| 32 | void __const_udelay(unsigned long xloops) | |
| 33 | { | |
| 34 | u64 loops; | |
| 35 | ||
| 36 | loops = (u64)xloops * loops_per_jiffy * HZ; | |
| 37 | ||
| 38 | __delay(loops >> 32); | |
| 39 | } | |
| 40 | EXPORT_SYMBOL(__const_udelay); | |
| 41 | ||
| 42 | void __udelay(unsigned long usecs) | |
| 43 | { | |
| 44 | __const_udelay(usecs * 0x10C7UL); /* 2**32 / 1000000 (rounded up) */ | |
| 45 | } | |
| 46 | EXPORT_SYMBOL(__udelay); | |
| 47 | ||
| 48 | void __ndelay(unsigned long nsecs) | |
| 49 | { | |
| 50 | __const_udelay(nsecs * 0x5UL); /* 2**32 / 1000000000 (rounded up) */ | |
| 51 | } | |
| 52 | EXPORT_SYMBOL(__ndelay); |