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52 lines
1.7 KiB
52 lines
1.7 KiB
/* |
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* Copyright 2010 Tilera Corporation. All Rights Reserved. |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License |
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* as published by the Free Software Foundation, version 2. |
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* |
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* This program is distributed in the hope that it will be useful, but |
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* WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or |
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* NON INFRINGEMENT. See the GNU General Public License for |
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* more details. |
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*/ |
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#ifndef _ASM_TILE_TIMEX_H |
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#define _ASM_TILE_TIMEX_H |
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/* |
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* This rate should be a multiple of the possible HZ values (100, 250, 1000) |
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* and a fraction of the possible hardware timer frequencies. Our timer |
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* frequency is highly tunable but also quite precise, so for the primary use |
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* of this value (setting ACT_HZ from HZ) we just pick a value that causes |
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* ACT_HZ to be set to HZ. We make the value somewhat large just to be |
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* more robust in case someone tries out a new value of HZ. |
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*/ |
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#define CLOCK_TICK_RATE 1000000 |
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typedef unsigned long long cycles_t; |
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#if CHIP_HAS_SPLIT_CYCLE() |
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cycles_t get_cycles(void); |
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#define get_cycles_low() __insn_mfspr(SPR_CYCLE_LOW) |
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#else |
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static inline cycles_t get_cycles(void) |
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{ |
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return __insn_mfspr(SPR_CYCLE); |
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} |
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#define get_cycles_low() __insn_mfspr(SPR_CYCLE) /* just get all 64 bits */ |
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#endif |
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cycles_t get_clock_rate(void); |
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/* Convert nanoseconds to core clock cycles. */ |
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cycles_t ns2cycles(unsigned long nsecs); |
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/* Called at cpu initialization to set some low-level constants. */ |
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void setup_clock(void); |
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/* Called at cpu initialization to start the tile-timer clock device. */ |
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void setup_tile_timer(void); |
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#endif /* _ASM_TILE_TIMEX_H */
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