| * Delay routines, using a pre-computed "loops_per_jiffy" value. |
| * Copyright (C) 2000, 2001 Paolo Alberelli |
| * Copyright (C) 2003, 2004 Paul Mundt |
| * This file is subject to the terms and conditions of the GNU General Public |
| * License. See the file "COPYING" in the main directory of this archive |
| * Use only for very small delays (< 1 msec). |
| * The active part of our cycle counter is only 32-bits wide, and |
| * we're treating the difference between two marks as signed. On |
| * a 1GHz box, that's about 2 seconds. |
| void __delay(unsigned long loops) |
| __asm__ __volatile__("gettr tr0, %1\n\t" |
| "ptabs %1, tr0\n\t":"=r"(loops), |
| void __const_udelay(unsigned long xloops) |
| __delay(xloops * (HZ * cpu_data[raw_smp_processor_id()].loops_per_jiffy)); |
| void __udelay(unsigned long usecs) |
| __const_udelay(usecs * 0x000010c6); /* 2**32 / 1000000 */ |
| void __ndelay(unsigned long nsecs) |
| __const_udelay(nsecs * 0x00000005); |