From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- arch/tile/include/asm/timex.h | 52 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 arch/tile/include/asm/timex.h (limited to 'arch/tile/include/asm/timex.h') diff --git a/arch/tile/include/asm/timex.h b/arch/tile/include/asm/timex.h new file mode 100644 index 000000000..dc987d53e --- /dev/null +++ b/arch/tile/include/asm/timex.h @@ -0,0 +1,52 @@ +/* + * Copyright 2010 Tilera Corporation. All Rights Reserved. + * + * 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, version 2. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + */ + +#ifndef _ASM_TILE_TIMEX_H +#define _ASM_TILE_TIMEX_H + +/* + * This rate should be a multiple of the possible HZ values (100, 250, 1000) + * and a fraction of the possible hardware timer frequencies. Our timer + * frequency is highly tunable but also quite precise, so for the primary use + * of this value (setting ACT_HZ from HZ) we just pick a value that causes + * ACT_HZ to be set to HZ. We make the value somewhat large just to be + * more robust in case someone tries out a new value of HZ. + */ +#define CLOCK_TICK_RATE 1000000 + +typedef unsigned long long cycles_t; + +#if CHIP_HAS_SPLIT_CYCLE() +cycles_t get_cycles(void); +#define get_cycles_low() __insn_mfspr(SPR_CYCLE_LOW) +#else +static inline cycles_t get_cycles(void) +{ + return __insn_mfspr(SPR_CYCLE); +} +#define get_cycles_low() __insn_mfspr(SPR_CYCLE) /* just get all 64 bits */ +#endif + +cycles_t get_clock_rate(void); + +/* Convert nanoseconds to core clock cycles. */ +cycles_t ns2cycles(unsigned long nsecs); + +/* Called at cpu initialization to set some low-level constants. */ +void setup_clock(void); + +/* Called at cpu initialization to start the tile-timer clock device. */ +void setup_tile_timer(void); + +#endif /* _ASM_TILE_TIMEX_H */ -- cgit v1.2.3-54-g00ecf