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authorEric Andersen <andersen@codepoet.org>2004-07-16 11:09:34 +0000
committerEric Andersen <andersen@codepoet.org>2004-07-16 11:09:34 +0000
commitc3d50a69839f8d80fc7244fde6e4a57e5e39dd36 (patch)
treec9e27baac7541384b806cce0845f28c1f59b5a2e /libpthread/linuxthreads/sysdeps/nios2
parent3cf731bf40f153a73373798085d1f45a80b972d6 (diff)
Pete Popov writes:
Hi Erik, I'm not sure why the NIOS support is not in uClibc -- perhaps the patch was rejected or never submitted? In any case, I'm playing with some NIOS stuff and created this patch against 0.9.26. The work was done by Microtronix. I'm not sure who else contributed to it. It would be great to have the NIOS support available in uClibc so developers don't have to go searching for these bits. Pete
Diffstat (limited to 'libpthread/linuxthreads/sysdeps/nios2')
-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 */