[urcu.git] / urcu / arch_s390.h

#ifndef _URCU_ARCH_S390_H
#define _URCU_ARCH_S390_H

/*
 * Trivial definitions for the S390 architecture based on information from the
 * Principles of Operation "CPU Serialization" (5-91), "BRANCH ON CONDITION"
 * (7-25) and "STORE CLOCK" (7-169).
 *
 * Copyright (c) 2009 Novell, Inc.
 * Author: Jan Blunck <jblunck@suse.de>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 */

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

#ifdef __cplusplus
extern "C" {
#endif 

#define CONFIG_HAVE_MEM_COHERENCY

#define CACHE_LINE_SIZE	128

#ifndef __SIZEOF_LONG__
#ifdef __s390x__
#define __SIZEOF_LONG__ 8
#else
#define __SIZEOF_LONG__ 4
#endif
#endif

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

#define mb()    __asm__ __volatile__("bcr 15,0" : : : "memory")
#define rmb()   __asm__ __volatile__("bcr 15,0" : : : "memory")
#define wmb()   __asm__ __volatile__("bcr 15,0" : : : "memory")
#define mc()	barrier()
#define rmc()	barrier()
#define wmc()	barrier()

#ifdef CONFIG_RCU_SMP
#define smp_mb()	mb()
#define smp_rmb()	rmb()
#define smp_wmb()	wmb()
#define smp_mc()	mc()
#define smp_rmc()	rmc()
#define smp_wmc()	wmc()
#else
#define smp_mb()	barrier()
#define smp_rmb()	barrier()
#define smp_wmb()	barrier()
#define smp_mc()	barrier()
#define smp_rmc()	barrier()
#define smp_wmc()	barrier()
#endif

/* Nop everywhere except on alpha. */
#define smp_read_barrier_depends()

static inline void cpu_relax(void)
{
	barrier();
}

static inline void sync_core()
{
	__asm__ __volatile__("bcr 15,0" : : : "memory");
}

typedef unsigned long long cycles_t;

static inline cycles_t get_cycles (void)
{
	cycles_t cycles;

	__asm__ __volatile__("stck %0" : "=m" (cycles) : : "cc", "memory" );

	return cycles;
}

#ifdef __cplusplus 
}
#endif

#endif /* _URCU_ARCH_S390_H */
Commit	Line	Data
2041a99a MD	1	#ifndef _URCU_ARCH_S390_H
2041a99a MD	2	#define _URCU_ARCH_S390_H
ac26f1a8 JB	3
ac26f1a8 JB	4	/*
7039fa6f JB	5	* Trivial definitions for the S390 architecture based on information from the
	6	* Principles of Operation "CPU Serialization" (5-91), "BRANCH ON CONDITION"
	7	* (7-25) and "STORE CLOCK" (7-169).
ac26f1a8	8	*
7039fa6f	9	* Copyright (c) 2009 Novell, Inc.
ac26f1a8 JB	10	* Author: Jan Blunck <jblunck@suse.de>
ac26f1a8 JB	11	*
7039fa6f JB	12	* Permission is hereby granted, free of charge, to any person obtaining a copy
	13	* of this software and associated documentation files (the "Software"), to
	14	* deal in the Software without restriction, including without limitation the
	15	* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
	16	* sell copies of the Software, and to permit persons to whom the Software is
	17	* furnished to do so, subject to the following conditions:
ac26f1a8	18	*
7039fa6f JB	19	* The above copyright notice and this permission notice shall be included in
7039fa6f JB	20	* all copies or substantial portions of the Software.
ac26f1a8	21	*
7039fa6f JB	22	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	23	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	24	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	25	* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	26	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
	27	* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
	28	* IN THE SOFTWARE.
ac26f1a8 JB	29	*/
	30
	31	#include <compiler.h>
1655f018	32	#include <urcu/config.h>
ac26f1a8	33
36bc70a8 MD	34	#ifdef __cplusplus
	35	extern "C" {
	36	#endif
	37
ac26f1a8	38	#define CONFIG_HAVE_MEM_COHERENCY
ac26f1a8	39
5b3c6672 MD	40	#define CACHE_LINE_SIZE 128
	41
	42	#ifndef __SIZEOF_LONG__
	43	#ifdef __s390x__
	44	#define __SIZEOF_LONG__ 8
	45	#else
	46	#define __SIZEOF_LONG__ 4
	47	#endif
	48	#endif
	49
ac26f1a8 JB	50	#ifndef BITS_PER_LONG
	51	#define BITS_PER_LONG (__SIZEOF_LONG__ * 8)
	52	#endif
	53
	54	#define mb() __asm__ __volatile__("bcr 15,0" : : : "memory")
f540a0fd MD	55	#define rmb() __asm__ __volatile__("bcr 15,0" : : : "memory")
f540a0fd MD	56	#define wmb() __asm__ __volatile__("bcr 15,0" : : : "memory")
ac26f1a8 JB	57	#define mc() barrier()
	58	#define rmc() barrier()
	59	#define wmc() barrier()
	60
02be5561	61	#ifdef CONFIG_RCU_SMP
ac26f1a8 JB	62	#define smp_mb() mb()
	63	#define smp_rmb() rmb()
	64	#define smp_wmb() wmb()
	65	#define smp_mc() mc()
	66	#define smp_rmc() rmc()
	67	#define smp_wmc() wmc()
49617de1 MD	68	#else
	69	#define smp_mb() barrier()
	70	#define smp_rmb() barrier()
	71	#define smp_wmb() barrier()
	72	#define smp_mc() barrier()
	73	#define smp_rmc() barrier()
	74	#define smp_wmc() barrier()
	75	#endif
ac26f1a8 JB	76
	77	/* Nop everywhere except on alpha. */
	78	#define smp_read_barrier_depends()
	79
	80	static inline void cpu_relax(void)
	81	{
	82	barrier();
	83	}
	84
	85	static inline void sync_core()
	86	{
	87	__asm__ __volatile__("bcr 15,0" : : : "memory");
	88	}
	89
	90	typedef unsigned long long cycles_t;
	91
	92	static inline cycles_t get_cycles (void)
	93	{
	94	cycles_t cycles;
	95
	96	__asm__ __volatile__("stck %0" : "=m" (cycles) : : "cc", "memory" );
	97
	98	return cycles;
	99	}
	100
36bc70a8 MD	101	#ifdef __cplusplus
	102	}
	103	#endif
	104
2041a99a	105	#endif /* _URCU_ARCH_S390_H */