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Diffstat (limited to 'include/asm-powerpc/time.h')
| -rw-r--r-- | include/asm-powerpc/time.h | 225 |
1 files changed, 0 insertions, 225 deletions
diff --git a/include/asm-powerpc/time.h b/include/asm-powerpc/time.h deleted file mode 100644 index baddc9ab57a..00000000000 --- a/include/asm-powerpc/time.h +++ /dev/null @@ -1,225 +0,0 @@ -/* - * Common time prototypes and such for all ppc machines. - * - * Written by Cort Dougan (cort@cs.nmt.edu) to merge - * Paul Mackerras' version and mine for PReP and Pmac. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - */ - -#ifndef __POWERPC_TIME_H -#define __POWERPC_TIME_H - -#ifdef __KERNEL__ -#include <linux/config.h> -#include <linux/types.h> -#include <linux/percpu.h> - -#include <asm/processor.h> -#ifdef CONFIG_PPC64 -#include <asm/paca.h> -#include <asm/iseries/hv_call.h> -#endif - -/* time.c */ -extern unsigned long tb_ticks_per_jiffy; -extern unsigned long tb_ticks_per_usec; -extern unsigned long tb_ticks_per_sec; -extern u64 tb_to_xs; -extern unsigned tb_to_us; -extern unsigned long tb_last_stamp; -extern u64 tb_last_jiffy; - -DECLARE_PER_CPU(unsigned long, last_jiffy); - -struct rtc_time; -extern void to_tm(int tim, struct rtc_time * tm); -extern time_t last_rtc_update; - -extern void generic_calibrate_decr(void); -extern void wakeup_decrementer(void); - -/* Some sane defaults: 125 MHz timebase, 1GHz processor */ -extern unsigned long ppc_proc_freq; -#define DEFAULT_PROC_FREQ (DEFAULT_TB_FREQ * 8) -extern unsigned long ppc_tb_freq; -#define DEFAULT_TB_FREQ 125000000UL - -/* - * By putting all of this stuff into a single struct we - * reduce the number of cache lines touched by do_gettimeofday. - * Both by collecting all of the data in one cache line and - * by touching only one TOC entry on ppc64. - */ -struct gettimeofday_vars { - u64 tb_to_xs; - u64 stamp_xsec; - u64 tb_orig_stamp; -}; - -struct gettimeofday_struct { - unsigned long tb_ticks_per_sec; - struct gettimeofday_vars vars[2]; - struct gettimeofday_vars * volatile varp; - unsigned var_idx; - unsigned tb_to_us; -}; - -struct div_result { - u64 result_high; - u64 result_low; -}; - -/* Accessor functions for the timebase (RTC on 601) registers. */ -/* If one day CONFIG_POWER is added just define __USE_RTC as 1 */ -#ifdef CONFIG_6xx -#define __USE_RTC() (!cpu_has_feature(CPU_FTR_USE_TB)) -#else -#define __USE_RTC() 0 -#endif - -/* On ppc64 this gets us the whole timebase; on ppc32 just the lower half */ -static inline unsigned long get_tbl(void) -{ - unsigned long tbl; - -#if defined(CONFIG_403GCX) - asm volatile("mfspr %0, 0x3dd" : "=r" (tbl)); -#else - asm volatile("mftb %0" : "=r" (tbl)); -#endif - return tbl; -} - -static inline unsigned int get_tbu(void) -{ - unsigned int tbu; - -#if defined(CONFIG_403GCX) - asm volatile("mfspr %0, 0x3dc" : "=r" (tbu)); -#else - asm volatile("mftbu %0" : "=r" (tbu)); -#endif - return tbu; -} - -static inline unsigned int get_rtcl(void) -{ - unsigned int rtcl; - - asm volatile("mfrtcl %0" : "=r" (rtcl)); - return rtcl; -} - -static inline u64 get_rtc(void) -{ - unsigned int hi, lo, hi2; - - do { - asm volatile("mfrtcu %0; mfrtcl %1; mfrtcu %2" - : "=r" (hi), "=r" (lo), "=r" (hi2)); - } while (hi2 != hi); - return (u64)hi * 1000000000 + lo; -} - -#ifdef CONFIG_PPC64 -static inline u64 get_tb(void) -{ - return mftb(); -} -#else -static inline u64 get_tb(void) -{ - unsigned int tbhi, tblo, tbhi2; - - do { - tbhi = get_tbu(); - tblo = get_tbl(); - tbhi2 = get_tbu(); - } while (tbhi != tbhi2); - - return ((u64)tbhi << 32) | tblo; -} -#endif - -static inline void set_tb(unsigned int upper, unsigned int lower) -{ - mtspr(SPRN_TBWL, 0); - mtspr(SPRN_TBWU, upper); - mtspr(SPRN_TBWL, lower); -} - -/* Accessor functions for the decrementer register. - * The 4xx doesn't even have a decrementer. I tried to use the - * generic timer interrupt code, which seems OK, with the 4xx PIT - * in auto-reload mode. The problem is PIT stops counting when it - * hits zero. If it would wrap, we could use it just like a decrementer. - */ -static inline unsigned int get_dec(void) -{ -#if defined(CONFIG_40x) - return (mfspr(SPRN_PIT)); -#else - return (mfspr(SPRN_DEC)); -#endif -} - -static inline void set_dec(int val) -{ -#if defined(CONFIG_40x) - return; /* Have to let it auto-reload */ -#elif defined(CONFIG_8xx_CPU6) - set_dec_cpu6(val); -#else -#ifdef CONFIG_PPC_ISERIES - int cur_dec; - - if (get_lppaca()->shared_proc) { - get_lppaca()->virtual_decr = val; - cur_dec = get_dec(); - if (cur_dec > val) - HvCall_setVirtualDecr(); - } else -#endif - mtspr(SPRN_DEC, val); -#endif /* not 40x or 8xx_CPU6 */ -} - -static inline unsigned long tb_ticks_since(unsigned long tstamp) -{ - if (__USE_RTC()) { - int delta = get_rtcl() - (unsigned int) tstamp; - return delta < 0 ? delta + 1000000000 : delta; - } - return get_tbl() - tstamp; -} - -#define mulhwu(x,y) \ -({unsigned z; asm ("mulhwu %0,%1,%2" : "=r" (z) : "r" (x), "r" (y)); z;}) - -#ifdef CONFIG_PPC64 -#define mulhdu(x,y) \ -({unsigned long z; asm ("mulhdu %0,%1,%2" : "=r" (z) : "r" (x), "r" (y)); z;}) -#else -extern u64 mulhdu(u64, u64); -#endif - -extern void smp_space_timers(unsigned int); - -extern unsigned mulhwu_scale_factor(unsigned, unsigned); -extern void div128_by_32(u64 dividend_high, u64 dividend_low, - unsigned divisor, struct div_result *dr); - -/* Used to store Processor Utilization register (purr) values */ - -struct cpu_usage { - u64 current_tb; /* Holds the current purr register values */ -}; - -DECLARE_PER_CPU(struct cpu_usage, cpu_usage_array); - -#endif /* __KERNEL__ */ -#endif /* __PPC64_TIME_H */ |