| * Copyright (C) 1993, 2000 Linus Torvalds |
| * Delay routines, using a pre-computed "loops_per_jiffy" value. |
| #include <linux/module.h> |
| #include <linux/sched.h> /* for udelay's use of smp_processor_id */ |
| * 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. |
| : "=&r" (tmp), "=r" (loops) : "1"(loops)); |
| #define LPJ cpu_data[smp_processor_id()].loops_per_jiffy |
| #define LPJ loops_per_jiffy |
| udelay(unsigned long usecs) |
| usecs *= (((unsigned long)HZ << 32) / 1000000) * LPJ; |
| __delay((long)usecs >> 32); |
| ndelay(unsigned long nsecs) |
| nsecs *= (((unsigned long)HZ << 32) / 1000000000) * LPJ; |
| __delay((long)nsecs >> 32); |