[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@efficios.com>
 *
 * 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 CAA_CACHE_LINE_SIZE	256

#define cmm_mb()    asm volatile("sync":::"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;					\
	})

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

typedef unsigned long long cycles_t;

#ifdef __powerpc64__
static inline cycles_t caa_get_cycles(void)
{
	return (cycles_t) mftb();
}
#else
static inline cycles_t caa_get_cycles(void)
{
	unsigned long h, l;

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

#ifdef __cplusplus 
}
#endif

#include <urcu/arch/generic.h>

#endif /* _URCU_ARCH_PPC_H */
Commit	Line	Data
ec4e58a3 MD	1	#ifndef _URCU_ARCH_PPC_H
ec4e58a3 MD	2	#define _URCU_ARCH_PPC_H
121a5d44	3
6d0ce021	4	/*
af02d47e	5	* arch_ppc.h: trivial definitions for the powerpc architecture.
6d0ce021	6	*
af02d47e	7	* Copyright (c) 2009 Paul E. McKenney, IBM Corporation.
6982d6d7	8	* Copyright (c) 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
6d0ce021	9	*
af02d47e MD	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.
05dd4b94	14	*
af02d47e	15	* This library is distributed in the hope that it will be useful,
6d0ce021	16	* but WITHOUT ANY WARRANTY; without even the implied warranty of
af02d47e MD	17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
af02d47e MD	18	* Lesser General Public License for more details.
6d0ce021	19	*
af02d47e MD	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
6d0ce021 PM	23	*/
6d0ce021 PM	24
ec4e58a3	25	#include <urcu/compiler.h>
c96a3726	26	#include <urcu/config.h>
121a5d44	27
36bc70a8 MD	28	#ifdef __cplusplus
	29	extern "C" {
	30	#endif
	31
b4e52e3e	32	/* Include size of POWER5+ L3 cache lines: 256 bytes */
06f22bdb	33	#define CAA_CACHE_LINE_SIZE 256
b4e52e3e	34
5481ddb3	35	#define cmm_mb() asm volatile("sync":::"memory")
6d0ce021	36
af02d47e MD	37	#define mftbl() \
	38	({ \
	39	unsigned long rval; \
	40	asm volatile("mftbl %0" : "=r" (rval)); \
	41	rval; \
	42	})
	43
	44	#define mftbu() \
	45	({ \
	46	unsigned long rval; \
	47	asm volatile("mftbu %0" : "=r" (rval)); \
	48	rval; \
	49	})
6d0ce021	50
9a9d403a TMQMF	51	#define mftb() \
	52	({ \
	53	unsigned long long rval; \
	54	asm volatile("mftb %0" : "=r" (rval)); \
	55	rval; \
	56	})
	57
6d0ce021 PM	58	typedef unsigned long long cycles_t;
6d0ce021 PM	59
9a9d403a TMQMF	60	#ifdef __powerpc64__
9a9d403a TMQMF	61	static inline cycles_t caa_get_cycles(void)
6d0ce021	62	{
9a9d403a TMQMF	63	return (cycles_t) mftb();
	64	}
	65	#else
	66	static inline cycles_t caa_get_cycles(void)
	67	{
	68	unsigned long h, l;
6d0ce021 PM	69
	70	for (;;) {
	71	h = mftbu();
5481ddb3	72	cmm_barrier();
6d0ce021	73	l = mftbl();
5481ddb3	74	cmm_barrier();
6d0ce021	75	if (mftbu() == h)
af02d47e	76	return (((cycles_t) h) << 32) + l;
6d0ce021 PM	77	}
6d0ce021 PM	78	}
9a9d403a	79	#endif
121a5d44	80
36bc70a8 MD	81	#ifdef __cplusplus
	82	}
	83	#endif
	84
1b9119f8	85	#include <urcu/arch/generic.h>
e4d1eb09	86
ec4e58a3	87	#endif /* _URCU_ARCH_PPC_H */