1 /* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * Copyright (C) 1998, 1999, 2003 by Ralf Baechle 7 */ 8 #ifndef _ASM_TIMEX_H 9 #define _ASM_TIMEX_H 10 11 #ifdef __KERNEL__ 12 13 #include <asm/mipsregs.h> 14 15 /* 16 * This is the clock rate of the i8253 PIT. A MIPS system may not have 17 * a PIT by the symbol is used all over the kernel including some APIs. 18 * So keeping it defined to the number for the PIT is the only sane thing 19 * for now. 20 */ 21 #define CLOCK_TICK_RATE 1193182 22 23 /* 24 * Standard way to access the cycle counter. 25 * Currently only used on SMP for scheduling. 26 * 27 * Only the low 32 bits are available as a continuously counting entity. 28 * But this only means we'll force a reschedule every 8 seconds or so, 29 * which isn't an evil thing. 30 * 31 * We know that all SMP capable CPUs have cycle counters. 32 */ 33 34 typedef unsigned int cycles_t; 35 36 static inline cycles_t get_cycles(void) 37 { 38 return 0; 39 } 40 41 #endif /* __KERNEL__ */ 42 43 #endif /* _ASM_TIMEX_H */ 44
