diff options
| author | darylm503 <darylm503@6f19259b-4bc3-4df7-8a09-765794883524> | 2011-04-27 21:42:16 +0000 |
|---|---|---|
| committer | darylm503 <darylm503@6f19259b-4bc3-4df7-8a09-765794883524> | 2011-04-27 21:42:16 +0000 |
| commit | 2aa62f2bc9a9654687b377d9ca8a8c2c860a3852 (patch) | |
| tree | 62a0991a44327154fb88bf95bd6f7522053db7bb /StdLib/Include/Arm/machine/atomic.h | |
| parent | 98790d814871cc30bbd536673d3a0948047cd2f0 (diff) | |
| download | edk2-platforms-2aa62f2bc9a9654687b377d9ca8a8c2c860a3852.tar.xz | |
Standard Libraries for EDK II.
This set of three packages: AppPkg, StdLib, StdLibPrivateInternalFiles; contains the implementation of libraries based upon non-UEFI standards such as ISO/IEC-9899, the library portion of the C Language Standard, POSIX, etc.
AppPkg contains applications that make use of the standard libraries defined in the StdLib Package.
StdLib contains header (include) files and the implementations of the standard libraries.
StdLibPrivateInternalFiles contains files for the exclusive use of the library implementations in StdLib. These files should never be directly referenced from applications or other code.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11600 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'StdLib/Include/Arm/machine/atomic.h')
| -rw-r--r-- | StdLib/Include/Arm/machine/atomic.h | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/StdLib/Include/Arm/machine/atomic.h b/StdLib/Include/Arm/machine/atomic.h new file mode 100644 index 0000000000..ffd83c7375 --- /dev/null +++ b/StdLib/Include/Arm/machine/atomic.h @@ -0,0 +1,102 @@ +/* $NetBSD: atomic.h,v 1.5 2005/12/28 19:09:29 perry Exp $ */
+
+/*
+ * Copyright (C) 1994-1997 Mark Brinicombe
+ * Copyright (C) 1994 Brini
+ * All rights reserved.
+ *
+ * This code is derived from software written for Brini by Mark Brinicombe
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by Brini.
+ * 4. The name of Brini may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL BRINI BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _ARM_ATOMIC_H_
+#define _ARM_ATOMIC_H_
+
+#ifndef ATOMIC_SET_BIT_NONINLINE_REQUIRED
+
+#if defined(__PROG26) || defined(ATOMIC_SET_BIT_NOINLINE)
+#define ATOMIC_SET_BIT_NONINLINE_REQUIRED
+#endif
+
+#endif /* ATOMIC_SET_BIT_NONINLINE_REQUIRED */
+
+
+#ifndef _LOCORE
+
+#include <sys/types.h>
+#include <arm/armreg.h> /* I32_bit */
+
+#ifdef ATOMIC_SET_BIT_NONINLINE_REQUIRED
+void atomic_set_bit( u_int *, u_int );
+void atomic_clear_bit( u_int *, u_int );
+#endif
+
+#ifdef __PROG32
+#define __with_interrupts_disabled(expr) \
+ do { \
+ u_int cpsr_save, tmp; \
+ \
+ __asm volatile( \
+ "mrs %0, cpsr;" \
+ "orr %1, %0, %2;" \
+ "msr cpsr_all, %1;" \
+ : "=r" (cpsr_save), "=r" (tmp) \
+ : "I" (I32_bit) \
+ : "cc" ); \
+ (expr); \
+ __asm volatile( \
+ "msr cpsr_all, %0" \
+ : /* no output */ \
+ : "r" (cpsr_save) \
+ : "cc" ); \
+ } while(0)
+
+static __inline void
+inline_atomic_set_bit( u_int *address, u_int setmask )
+{
+ __with_interrupts_disabled( *address |= setmask );
+}
+
+static __inline void
+inline_atomic_clear_bit( u_int *address, u_int clearmask )
+{
+ __with_interrupts_disabled( *address &= ~clearmask );
+}
+
+#if !defined(ATOMIC_SET_BIT_NOINLINE)
+
+#define atomic_set_bit(a,m) inline_atomic_set_bit(a,m)
+#define atomic_clear_bit(a,m) inline_atomic_clear_bit(a,m)
+
+#endif
+
+#endif /* __PROG32 */
+
+#undef __with_interrupts_disabled
+
+#endif /* _LOCORE */
+#endif /* _ARM_ATOMIC_H_ */
|