60 lines
1.9 KiB
C
60 lines
1.9 KiB
C
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#ifndef _ASM_PPC64_MEMORY_H_
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#define _ASM_PPC64_MEMORY_H_
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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; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/config.h>
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/*
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* Arguably the bitops and *xchg operations don't imply any memory barrier
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* or SMP ordering, but in fact a lot of drivers expect them to imply
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* both, since they do on x86 cpus.
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*/
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#ifdef CONFIG_SMP
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#define EIEIO_ON_SMP "eieio\n"
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#define ISYNC_ON_SMP "\n\tisync"
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#else
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#define EIEIO_ON_SMP
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#define ISYNC_ON_SMP
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#endif
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static inline void eieio(void)
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{
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__asm__ __volatile__ ("eieio" : : : "memory");
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}
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static inline void isync(void)
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{
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__asm__ __volatile__ ("isync" : : : "memory");
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}
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#ifdef CONFIG_SMP
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#define eieio_on_smp() eieio()
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#define isync_on_smp() isync()
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#else
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#define eieio_on_smp() __asm__ __volatile__("": : :"memory")
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#define isync_on_smp() __asm__ __volatile__("": : :"memory")
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#endif
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/* Macros for adjusting thread priority (hardware multi-threading) */
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#define HMT_very_low() asm volatile("or 31,31,31 # very low priority")
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#define HMT_low() asm volatile("or 1,1,1 # low priority")
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#define HMT_medium_low() asm volatile("or 6,6,6 # medium low priority")
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#define HMT_medium() asm volatile("or 2,2,2 # medium priority")
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#define HMT_medium_high() asm volatile("or 5,5,5 # medium high priority")
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#define HMT_high() asm volatile("or 3,3,3 # high priority")
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#define HMT_VERY_LOW "\tor 31,31,31 # very low priority\n"
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#define HMT_LOW "\tor 1,1,1 # low priority\n"
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#define HMT_MEDIUM_LOW "\tor 6,6,6 # medium low priority\n"
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#define HMT_MEDIUM "\tor 2,2,2 # medium priority\n"
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#define HMT_MEDIUM_HIGH "\tor 5,5,5 # medium high priority\n"
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#define HMT_HIGH "\tor 3,3,3 # high priority\n"
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#endif
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