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Diffstat (limited to 'libpthread/linuxthreads/sysdeps/nios2/pt-machine.h')
-rw-r--r--libpthread/linuxthreads/sysdeps/nios2/pt-machine.h58
1 files changed, 58 insertions, 0 deletions
diff --git a/libpthread/linuxthreads/sysdeps/nios2/pt-machine.h b/libpthread/linuxthreads/sysdeps/nios2/pt-machine.h
new file mode 100644
index 000000000..484a77e14
--- /dev/null
+++ b/libpthread/linuxthreads/sysdeps/nios2/pt-machine.h
@@ -0,0 +1,58 @@
+/* Machine-dependent pthreads configuration and inline functions.
+ nios2 version.
+ Copyright (C) 1996, 1998, 2000, 2002 Free Software Foundation, Inc.
+ 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
+
+#ifndef PT_EI
+# define PT_EI extern inline
+#endif
+
+extern long int testandset (int *spinlock);
+
+/* Spinlock implementation; required. */
+PT_EI long int
+testandset (int *spinlock)
+{
+ unsigned int scratch;
+ long int ret=-2;
+
+ __asm__ __volatile__(
+ "rdctl %0, status\n\t"
+ "and %0, %0, %1\n\t"
+ "wrctl status, %0 #disable interrupts\n\t"
+ "ldw %1, 0(%4)\n\t"
+ "stw %3, 0(%4)\n\t"
+ "ori %0, %0, 1\n\t"
+ "wrctl status, %0 #enable interrupts\n\t"
+ : "=&r"(scratch), "=r"(ret)
+ : "1"(ret), "r"(1), "r"(spinlock)
+ : "memory");
+
+ return ret;
+}
+
+
+/* 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");
+
+#endif /* pt-machine.h */