--- /dev/null
+#ifndef _URCU_ARCH_SPARC64_H
+#define _URCU_ARCH_SPARC64_H
+
+/*
+ * arch_sparc64.h: trivial definitions for the Sparc64 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>
+
+#define CONFIG_HAVE_MEM_COHERENCY
+
+#define CACHE_LINE_SIZE 256
+
+#ifndef BITS_PER_LONG
+#define BITS_PER_LONG (__SIZEOF_LONG__ * 8)
+#endif
+
+/*
+ * Inspired from the Linux kernel. Workaround Spitfire bug #51.
+ */
+#define membar_safe(type) \
+__asm__ __volatile__("ba,pt %%xcc, 1f\n\t" \
+ "membar " type "\n" \
+ "1:\n" \
+ : : : "memory")
+
+#define mb() membar_safe("#LoadLoad | #LoadStore | #StoreStore | #StoreLoad")
+#define rmb() membar_safe("#LoadLoad")
+#define wmb() membar_safe("#StoreStore")
+
+/*
+ * Architectures without cache coherency need something like the following:
+ *
+ * #define mb() mc()
+ * #define rmb() rmc()
+ * #define wmb() wmc()
+ * #define mc() arch_cache_flush()
+ * #define rmc() arch_cache_flush_read()
+ * #define wmc() arch_cache_flush_write()
+ */
+
+#define mc() barrier()
+#define rmc() barrier()
+#define wmc() barrier()
+
+#ifdef CONFIG_URCU_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();
+}
+
+/*
+ * Serialize core instruction execution. Also acts as a compiler barrier.
+ */
+static inline void sync_core()
+{
+ mb();
+}
+
+typedef unsigned long long cycles_t;
+
+static inline cycles_t get_cycles (void)
+{
+ return 0; /* unimplemented */
+}
+
+#endif /* _URCU_ARCH_SPARC64_H */
--- /dev/null
+#ifndef _URCU_ARCH_UATOMIC_SPARC64_H
+#define _URCU_ARCH_UATOMIC_SPARC64_H
+
+/*
+ * Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved.
+ * Copyright (c) 1996-1999 by Silicon Graphics. All rights reserved.
+ * Copyright (c) 1999-2003 by Hewlett-Packard Company. All rights reserved.
+ * Copyright (c) 2009 Mathieu Desnoyers
+ *
+ * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
+ * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
+ *
+ * Permission is hereby granted to use or copy this program
+ * for any purpose, provided the above notices are retained on all copies.
+ * Permission to modify the code and to distribute modified code is granted,
+ * provided the above notices are retained, and a notice that the code was
+ * modified is included with the above copyright notice.
+ *
+ * Code inspired from libuatomic_ops-1.2, inherited in part from the
+ * Boehm-Demers-Weiser conservative garbage collector.
+ */
+
+#include <urcu/compiler.h>
+#include <urcu/system.h>
+
+#ifndef __SIZEOF_LONG__
+#if (defined(__sparc_v8__) || defined(__sparc_v9__))
+#define __SIZEOF_LONG__ 8
+#else
+#define __SIZEOF_LONG__ 4
+#endif
+#endif
+
+#ifndef BITS_PER_LONG
+#define BITS_PER_LONG (__SIZEOF_LONG__ * 8)
+#endif
+
+#define uatomic_set(addr, v) STORE_SHARED(*(addr), (v))
+#define uatomic_read(addr) LOAD_SHARED(*(addr))
+
+/* cmpxchg */
+
+static inline __attribute__((always_inline))
+unsigned long _uatomic_cmpxchg(void *addr, unsigned long old,
+ unsigned long _new, int len)
+{
+ switch (len) {
+ case 4:
+ {
+ __asm__ __volatile__ (
+ "membar #StoreLoad | #LoadLoad\n\t"
+ "cas [%1],%2,%0\n\t"
+ "membar #StoreLoad | #StoreStore\n\t"
+ : "+&r" (_new)
+ : "r" (addr), "r" (old)
+ : "memory");
+
+ return _new;
+ }
+#if (BITS_PER_LONG == 64)
+ case 8:
+ {
+ __asm__ __volatile__ (
+ "membar #StoreLoad | #LoadLoad\n\t"
+ "casx [%1],%2,%0\n\t"
+ "membar #StoreLoad | #StoreStore\n\t"
+ : "+&r" (_new)
+ : "r" (addr), "r" (old)
+ : "memory");
+
+ return _new;
+ }
+#endif
+ }
+ __builtin_trap();
+ return 0;
+}
+
+
+#define uatomic_cmpxchg(addr, old, _new) \
+ ((__typeof__(*(addr))) _uatomic_cmpxchg((addr), (unsigned long)(old),\
+ (unsigned long)(_new), \
+ sizeof(*(addr))))
+
+/* xchg */
+
+static inline __attribute__((always_inline))
+unsigned long _uatomic_exchange(void *addr, unsigned long val, int len)
+{
+ switch (len) {
+ case 4:
+ {
+ unsigned int old;
+
+ oldt = uatomic_read(addr);
+ do {
+ old = oldt;
+ oldt = _uatomic_cmpxchg(addr, old, val, 4);
+ } while (oldt != old);
+
+ return old;
+ }
+#if (BITS_PER_LONG == 64)
+ case 8:
+ {
+ unsigned long old;
+
+ oldt = uatomic_read(addr);
+ do {
+ old = oldt;
+ oldt = _uatomic_cmpxchg(addr, old, val, 8);
+ } while (oldt != old);
+
+ return old;
+ }
+#endif
+ }
+ __builtin_trap();
+ return 0;
+}
+
+#define uatomic_xchg(addr, v) \
+ ((__typeof__(*(addr))) _uatomic_exchange((addr), (unsigned long)(v), \
+ sizeof(*(addr))))
+
+/* uatomic_add_return */
+
+static inline __attribute__((always_inline))
+unsigned long _uatomic_add_return(void *addr, unsigned long val,
+ int len)
+{
+ switch (len) {
+ case 4:
+ {
+ unsigned int old;
+
+ oldt = uatomic_read(addr);
+ do {
+ old = oldt;
+ oldt = _uatomic_cmpxchg(addr, old, old + val, 4);
+ } while (oldt != old);
+
+ return old + val;
+ }
+#if (BITS_PER_LONG == 64)
+ case 8:
+ {
+ unsigned long old;
+
+ oldt = uatomic_read(addr);
+ do {
+ old = oldt;
+ oldt = _uatomic_cmpxchg(addr, old, old + val, 8);
+ } while (oldt != old);
+
+ return old + val;
+ }
+#endif
+ }
+ __builtin_trap();
+ return 0;
+}
+
+#define uatomic_add_return(addr, v) \
+ ((__typeof__(*(addr))) _uatomic_add_return((addr), \
+ (unsigned long)(v), \
+ sizeof(*(addr))))
+
+/* uatomic_sub_return, uatomic_add, uatomic_sub, uatomic_inc, uatomic_dec */
+
+#define uatomic_sub_return(addr, v) uatomic_add_return((addr), -(v))
+
+#define uatomic_add(addr, v) (void)uatomic_add_return((addr), (v))
+#define uatomic_sub(addr, v) (void)uatomic_sub_return((addr), (v))
+
+#define uatomic_inc(addr) uatomic_add((addr), 1)
+#define uatomic_dec(addr) uatomic_add((addr), -1)
+
+#define URCU_CAS_AVAIL() 1
+#define compat_uatomic_cmpxchg(ptr, old, _new) uatomic_cmpxchg(ptr, old, _new)
+
+#endif /* _URCU_ARCH_UATOMIC_PPC_H */
projects / userspace-rcu.git / commitdiff
