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106 lines
2.9 KiB
Diff
106 lines
2.9 KiB
Diff
Subject: [PATCH] libpthread: AVR32 support
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Implement pt-machine.h for AVR32.
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---
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libpthread/linuxthreads/sysdeps/avr32/pt-machine.h | 92 +++++++++++++++++++++
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1 file changed, 92 insertions(+)
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Index: uClibc-0.9.28/libpthread/linuxthreads/sysdeps/avr32/pt-machine.h
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===================================================================
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--- /dev/null 1970-01-01 00:00:00.000000000 +0000
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+++ uClibc-0.9.28/libpthread/linuxthreads/sysdeps/avr32/pt-machine.h 2006-02-07 17:14:47.000000000 +0100
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@@ -0,0 +1,92 @@
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+/* Machine-dependent pthreads configuration and inline functions.
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+
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+ Copyright (C) 2005 Atmel Norway
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+ This file is part of the GNU C Library.
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+
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+ The GNU C Library is free software; you can redistribute it and/or
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+ modify it under the terms of the GNU Lesser General Public License as
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+ published by the Free Software Foundation; either version 2.1 of the
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+ License, or (at your option) any later version.
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+
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+ The GNU C Library is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ Lesser General Public License for more details.
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+
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+ You should have received a copy of the GNU Lesser General Public
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+ License along with the GNU C Library; see the file COPYING.LIB. If not,
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+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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+ Boston, MA 02111-1307, USA. */
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+
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+#ifndef _PT_MACHINE_H
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+#define _PT_MACHINE_H 1
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+
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+#include <features.h>
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+
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+static inline int
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+_test_and_set (int *p, int v) __THROW
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+{
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+ int result;
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+
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+ __asm__ __volatile__(
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+ "/* Inline test and set */\n"
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+ "1: ssrf 5\n"
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+ " ld.w %0, %2\n"
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+ " tst %0, %3\n"
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+ " breq 2f\n"
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+ " stcond %1, %3\n"
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+ " brne 1b\n"
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+ "2:"
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+ : "=&r"(result), "=m"(*p)
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+ : "m"(*p), "r"(v)
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+ : "memory", "cc");
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+
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+ return result;
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+}
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+
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+#ifndef PT_EI
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+# define PT_EI extern inline
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+#endif
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+
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+extern long int testandset (int *spinlock);
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+extern int __compare_and_swap (long int *p, long int oldval, long int newval);
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+
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+/* Spinlock implementation; required. */
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+PT_EI long int
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+testandset (int *spinlock)
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+{
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+ return _test_and_set(spinlock, 1);
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+}
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+
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+
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+/* Get some notion of the current stack. Need not be exactly the top
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+ of the stack, just something somewhere in the current frame. */
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+#define CURRENT_STACK_FRAME stack_pointer
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+register char * stack_pointer __asm__ ("sp");
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+
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+/* Compare-and-swap for semaphores. */
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+
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+#define HAS_COMPARE_AND_SWAP
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+PT_EI int
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+__compare_and_swap(long int *p, long int oldval, long int newval)
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+{
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+ long int result, tmp;
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+
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+ __asm__ __volatile__(
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+ "/* Inline compare and swap */\n"
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+ "1: ssrf 5\n"
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+ " ld.w %1, %3\n"
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+ " cp.w %1, %5\n"
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+ " sreq %0\n"
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+ " brne 2f\n"
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+ " stcond %2, %4\n"
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+ " brne 1b\n"
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+ "2:"
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+ : "=&r"(result), "=&r"(tmp), "=m"(*p)
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+ : "m"(*p), "r"(newval), "r"(oldval)
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+ : "cc", "memory");
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+
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+ return result;
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+}
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+
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+#endif /* pt-machine.h */
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