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Message-Id: <92e3ab88c2174acf4e25c474c1f68ffd4db72ca6.1215517976.git.monstr@monstr.eu>
Date: Tue, 8 Jul 2008 13:59:39 +0200
From: monstr@...str.eu
To: linux-kernel@...r.kernel.org
Cc: monstr@...nam.cz, arnd@...db.de, linux-arch@...r.kernel.org,
stephen.neuendorffer@...inx.com, John.Linn@...inx.com,
john.williams@...alogix.com, matthew@....cx, will.newton@...il.com,
drepper@...hat.com, microblaze-uclinux@...e.uq.edu.au,
grant.likely@...retlab.ca, vapier.adi@...il.com,
alan@...rguk.ukuu.org.uk, hpa@...or.com, lethal@...ux-sh.org,
florian@...nwrt.org, Michal Simek <monstr@...str.eu>
Subject: [PATCH 39/58] microblaze_v5: atomic.h bitops.h byteorder.h
From: Michal Simek <monstr@...str.eu>
Acked-by: Stephen Neuendorffer <stephen.neuendorffer@...inx.com>
Signed-off-by: Michal Simek <monstr@...str.eu>
---
include/asm-microblaze/atomic.h | 106 ++++++++++++++++++++++++++++++++++++
include/asm-microblaze/bitops.h | 26 +++++++++
include/asm-microblaze/byteorder.h | 21 +++++++
3 files changed, 153 insertions(+), 0 deletions(-)
create mode 100644 include/asm-microblaze/atomic.h
create mode 100644 include/asm-microblaze/bitops.h
create mode 100644 include/asm-microblaze/byteorder.h
diff --git a/include/asm-microblaze/atomic.h b/include/asm-microblaze/atomic.h
new file mode 100644
index 0000000..754688a
--- /dev/null
+++ b/include/asm-microblaze/atomic.h
@@ -0,0 +1,106 @@
+/*
+ * Copyright (C) 2006 Atmark Techno, Inc.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#ifndef _ASM_MICROBLAZE_ATOMIC_H
+#define _ASM_MICROBLAZE_ATOMIC_H
+
+#include <linux/compiler.h> /* likely */
+#include <asm/system.h> /* local_irq_XXX and friends */
+
+typedef struct { volatile int counter; } atomic_t;
+
+#define ATOMIC_INIT(i) { (i) }
+#define atomic_read(v) ((v)->counter)
+#define atomic_set(v, i) (((v)->counter) = (i))
+
+#define atomic_inc(v) (atomic_add_return(1, (v)))
+#define atomic_dec(v) (atomic_sub_return(1, (v)))
+
+#define atomic_add(i, v) (atomic_add_return(i, (v)))
+#define atomic_sub(i, v) (atomic_sub_return(i, (v)))
+
+#define atomic_inc_return(v) (atomic_add_return(1, (v)))
+#define atomic_dec_return(v) (atomic_sub_return(1, (v)))
+
+#define atomic_inc_and_test(v) (atomic_add_return(1, (v)) == 0)
+#define atomic_dec_and_test(v) (atomic_sub_return(1, (v)) == 0)
+
+#define atomic_inc_not_zero(v) (atomic_add_unless((v), 1, 0))
+
+#define atomic_sub_and_test(i, v) (atomic_sub_return((i), (v)) == 0)
+
+static inline int atomic_cmpxchg(atomic_t *v, int old, int new)
+{
+ int ret;
+ unsigned long flags;
+
+ local_irq_save(flags);
+ ret = v->counter;
+ if (likely(ret == old))
+ v->counter = new;
+ local_irq_restore(flags);
+
+ return ret;
+}
+
+static inline int atomic_add_unless(atomic_t *v, int a, int u)
+{
+ int c, old;
+
+ c = atomic_read(v);
+ while (c != u && (old = atomic_cmpxchg((v), c, c + a)) != c)
+ c = old;
+ return c != u;
+}
+
+static inline void atomic_clear_mask(unsigned long mask, unsigned long *addr)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+ *addr &= ~mask;
+ local_irq_restore(flags);
+}
+
+/**
+ * atomic_add_return - add and return
+ * @i: integer value to add
+ * @v: pointer of type atomic_t
+ *
+ * Atomically adds @i to @v and returns @i + @v
+ */
+static inline int atomic_add_return(int i, atomic_t *v)
+{
+ unsigned long flags;
+ int val;
+
+ local_irq_save(flags);
+ val = v->counter;
+ v->counter = val += i;
+ local_irq_restore(flags);
+
+ return val;
+}
+
+static inline int atomic_sub_return(int i, atomic_t *v)
+{
+ return atomic_add_return(-i, v);
+}
+
+#define atomic_add_negative(a, v) (atomic_add_return((a), (v)) < 0)
+#define atomic_xchg(v, new) (xchg(&((v)->counter), new))
+
+/* Atomic operations are already serializing */
+#define smp_mb__before_atomic_dec() barrier()
+#define smp_mb__after_atomic_dec() barrier()
+#define smp_mb__before_atomic_inc() barrier()
+#define smp_mb__after_atomic_inc() barrier()
+
+#include <asm-generic/atomic.h>
+
+#endif /* _ASM_MICROBLAZE_ATOMIC_H */
diff --git a/include/asm-microblaze/bitops.h b/include/asm-microblaze/bitops.h
new file mode 100644
index 0000000..43344b6
--- /dev/null
+++ b/include/asm-microblaze/bitops.h
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2006 Atmark Techno, Inc.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#ifndef _ASM_MICROBLAZE_BITOPS_H
+#define _ASM_MICROBLAZE_BITOPS_H
+
+/*
+ * Copyright 1992, Linus Torvalds.
+ */
+
+#include <asm/byteorder.h> /* swab32 */
+#include <asm/system.h> /* save_flags */
+
+/*
+ * clear_bit() doesn't provide any barrier for the compiler.
+ */
+#define smp_mb__before_clear_bit() barrier()
+#define smp_mb__after_clear_bit() barrier()
+#include <asm-generic/bitops.h>
+
+#endif /* _ASM_MICROBLAZE_BITOPS_H */
diff --git a/include/asm-microblaze/byteorder.h b/include/asm-microblaze/byteorder.h
new file mode 100644
index 0000000..dad9204
--- /dev/null
+++ b/include/asm-microblaze/byteorder.h
@@ -0,0 +1,21 @@
+/*
+ * Copyright (C) 2006 Atmark Techno, Inc.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#ifndef _ASM_MICROBLAZE_BYTEORDER_H
+#define _ASM_MICROBLAZE_BYTEORDER_H
+
+#include <asm/types.h>
+
+#if defined(__GNUC__) && !defined(__STRICT_ANSI__) || defined(__KERNEL__)
+#define __BYTEORDER_HAS_U64__
+#define __SWAB_64_THRU_32__
+#endif
+
+#include <linux/byteorder/big_endian.h>
+
+#endif /* _ASM_MICROBLAZE_BYTEORDER_H */
--
1.5.4.GIT
--
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