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Subject: [PATCH] libpthread: AVR32 support
Implement pt-machine.h for AVR32.
---
libpthread/linuxthreads/sysdeps/avr32/pt-machine.h | 92 +++++++++++++++++++++
1 file changed, 92 insertions(+)
Index: uClibc-0.9.28/libpthread/linuxthreads/sysdeps/avr32/pt-machine.h
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ uClibc-0.9.28/libpthread/linuxthreads/sysdeps/avr32/pt-machine.h 2006-02-07 17:14:47.000000000 +0100
@@ -0,0 +1,92 @@
+/* Machine-dependent pthreads configuration and inline functions.
+
+ Copyright (C) 2005 Atmel Norway
+ This file is part of the GNU C Library.
+
+ The GNU C 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.
+
+ The GNU C 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 the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#ifndef _PT_MACHINE_H
+#define _PT_MACHINE_H 1
+
+#include <features.h>
+
+static inline int
+_test_and_set (int *p, int v) __THROW
+{
+ int result;
+
+ __asm__ __volatile__(
+ "/* Inline test and set */\n"
+ "1: ssrf 5\n"
+ " ld.w %0, %2\n"
+ " tst %0, %3\n"
+ " breq 2f\n"
+ " stcond %1, %3\n"
+ " brne 1b\n"
+ "2:"
+ : "=&r"(result), "=m"(*p)
+ : "m"(*p), "r"(v)
+ : "memory", "cc");
+
+ return result;
+}
+
+#ifndef PT_EI
+# define PT_EI extern inline
+#endif
+
+extern long int testandset (int *spinlock);
+extern int __compare_and_swap (long int *p, long int oldval, long int newval);
+
+/* Spinlock implementation; required. */
+PT_EI long int
+testandset (int *spinlock)
+{
+ return _test_and_set(spinlock, 1);
+}
+
+
+/* Get some notion of the current stack. Need not be exactly the top
+ of the stack, just something somewhere in the current frame. */
+#define CURRENT_STACK_FRAME stack_pointer
+register char * stack_pointer __asm__ ("sp");
+
+/* Compare-and-swap for semaphores. */
+
+#define HAS_COMPARE_AND_SWAP
+PT_EI int
+__compare_and_swap(long int *p, long int oldval, long int newval)
+{
+ long int result, tmp;
+
+ __asm__ __volatile__(
+ "/* Inline compare and swap */\n"
+ "1: ssrf 5\n"
+ " ld.w %1, %3\n"
+ " cp.w %1, %5\n"
+ " sreq %0\n"
+ " brne 2f\n"
+ " stcond %2, %4\n"
+ " brne 1b\n"
+ "2:"
+ : "=&r"(result), "=&r"(tmp), "=m"(*p)
+ : "m"(*p), "r"(newval), "r"(oldval)
+ : "cc", "memory");
+
+ return result;
+}
+
+#endif /* pt-machine.h */
|
