X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=urcu%2Farch_s390.h;fp=urcu%2Farch_s390.h;h=6c69a46cf36a33a3954780201a87297414127716;hb=ec4e58a3aba2084440012f8ccac3a31eb6101183;hp=0000000000000000000000000000000000000000;hpb=2f873279bc92fac32e6549d6eb72f3197c7048ac;p=urcu.git

diff --git a/urcu/arch_s390.h b/urcu/arch_s390.h
new file mode 100644
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+++ b/urcu/arch_s390.h
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+#ifndef _ARCH_S390_H
+#define _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 <arch_uatomic.h>
+
+#define CONFIG_HAVE_MEM_COHERENCY
+/* Assume SMP machine, given we don't have this information */
+#define CONFIG_SMP 1
+
+#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()
+
+#define smp_mb()	mb()
+#define smp_rmb()	rmb()
+#define smp_wmb()	wmb()
+#define smp_mc()	mc()
+#define smp_rmc()	rmc()
+#define smp_wmc()	wmc()
+
+/* 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;
+}
+
+#endif /* _ARCH_S390_H */