[urcu.git] / urcu / arch_ppc.h

#ifndef _URCU_ARCH_PPC_H
#define _URCU_ARCH_PPC_H

/*
 * arch_ppc.h: trivial definitions for the powerpc architecture.
 *
 * Copyright (c) 2009 Paul E. McKenney, IBM Corporation.
 * Copyright (c) 2009 Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
*
 * This library 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.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <urcu/compiler.h>
#include <urcu/config.h>

#ifdef __cplusplus
extern "C" {
#endif 

/* Include size of POWER5+ L3 cache lines: 256 bytes */
#define CACHE_LINE_SIZE	256

#ifndef BITS_PER_LONG
#define BITS_PER_LONG	(__SIZEOF_LONG__ * 8)
#endif

#define mb()    asm volatile("sync":::"memory")

/*
 * Serialize core instruction execution. Also acts as a compiler barrier.
 */
#define sync_core()	asm volatile("isync" : : : "memory")

#define mftbl()						\
	({ 						\
		unsigned long rval;			\
		asm volatile("mftbl %0" : "=r" (rval));	\
		rval;					\
	})

#define mftbu()						\
	({						\
		unsigned long rval;			\
		asm volatile("mftbu %0" : "=r" (rval));	\
		rval;					\
	})

typedef unsigned long long cycles_t;

static inline cycles_t get_cycles (void)
{
	long h, l;

	for (;;) {
		h = mftbu();
		barrier();
		l = mftbl();
		barrier();
		if (mftbu() == h)
			return (((cycles_t) h) << 32) + l;
	}
}

#ifdef __cplusplus 
}
#endif

#include <urcu/arch_generic.h>

#endif /* _URCU_ARCH_PPC_H */
Commit	Line	Data
	1	#ifndef _URCU_ARCH_PPC_H
	2	#define _URCU_ARCH_PPC_H
	3
	4	/*
	5	* arch_ppc.h: trivial definitions for the powerpc architecture.
	6	*
	7	* Copyright (c) 2009 Paul E. McKenney, IBM Corporation.
	8	* Copyright (c) 2009 Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
	9	*
	10	* This library is free software; you can redistribute it and/or
	11	* modify it under the terms of the GNU Lesser General Public
	12	* License as published by the Free Software Foundation; either
	13	* version 2.1 of the License, or (at your option) any later version.
	14	*
	15	* This library is distributed in the hope that it will be useful,
	16	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	18	* Lesser General Public License for more details.
	19	*
	20	* You should have received a copy of the GNU Lesser General Public
	21	* License along with this library; if not, write to the Free Software
	22	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	23	*/
	24
	25	#include <urcu/compiler.h>
	26	#include <urcu/config.h>
	27
	28	#ifdef __cplusplus
	29	extern "C" {
	30	#endif
	31
	32	/* Include size of POWER5+ L3 cache lines: 256 bytes */
	33	#define CACHE_LINE_SIZE 256
	34
	35	#ifndef BITS_PER_LONG
	36	#define BITS_PER_LONG (__SIZEOF_LONG__ * 8)
	37	#endif
	38
	39	#define mb() asm volatile("sync":::"memory")
	40
	41	/*
	42	* Serialize core instruction execution. Also acts as a compiler barrier.
	43	*/
	44	#define sync_core() asm volatile("isync" : : : "memory")
	45
	46	#define mftbl() \
	47	({ \
	48	unsigned long rval; \
	49	asm volatile("mftbl %0" : "=r" (rval)); \
	50	rval; \
	51	})
	52
	53	#define mftbu() \
	54	({ \
	55	unsigned long rval; \
	56	asm volatile("mftbu %0" : "=r" (rval)); \
	57	rval; \
	58	})
	59
	60	typedef unsigned long long cycles_t;
	61
	62	static inline cycles_t get_cycles (void)
	63	{
	64	long h, l;
	65
	66	for (;;) {
	67	h = mftbu();
	68	barrier();
	69	l = mftbl();
	70	barrier();
	71	if (mftbu() == h)
	72	return (((cycles_t) h) << 32) + l;
	73	}
	74	}
	75
	76	#ifdef __cplusplus
	77	}
	78	#endif
	79
	80	#include <urcu/arch_generic.h>
	81
	82	#endif /* _URCU_ARCH_PPC_H */