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authorWaldemar Brodkorb <wbx@openadk.org>2015-02-14 23:00:19 -0600
committerWaldemar Brodkorb <wbx@openadk.org>2015-02-14 23:00:19 -0600
commit6b6ede3d15f04fe825cfa9f697507457e3640344 (patch)
treeefe9bf75eaf2200f89087ed0ef2ef350549ccd6d /libpthread/linuxthreads/sysdeps/nios/pt-machine.h
parentf972c2262fd4efc2bbf9789dce145bb705acec24 (diff)
resolve merge
Diffstat (limited to 'libpthread/linuxthreads/sysdeps/nios/pt-machine.h')
-rw-r--r--libpthread/linuxthreads/sysdeps/nios/pt-machine.h67
1 files changed, 67 insertions, 0 deletions
diff --git a/libpthread/linuxthreads/sysdeps/nios/pt-machine.h b/libpthread/linuxthreads/sysdeps/nios/pt-machine.h
new file mode 100644
index 000000000..91bbf8fea
--- /dev/null
+++ b/libpthread/linuxthreads/sysdeps/nios/pt-machine.h
@@ -0,0 +1,67 @@
+/* Machine-dependent pthreads configuration and inline functions.
+ ARM version.
+ Copyright (C) 1997, 1998 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Philip Blundell <philb@gnu.org>.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 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
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ see <http://www.gnu.org/licenses/>. */
+
+#ifndef _PT_MACHINE_H
+#define _PT_MACHINE_H 1
+
+#include <features.h>
+
+#ifndef PT_EI
+# define PT_EI __extern_always_inline
+#endif
+
+/* Spinlock implementation; required. */
+/* it is weird and dangerous to disable interrupt in userspace, but for nios
+ what else we can do before we have a swap like instruction? This is better
+ than nothing
+ */
+PT_EI long int
+testandset (int *spinlock)
+{
+ unsigned int ret;
+
+ __asm__ __volatile__("pfx 8\n\t"
+ "wrctl %1 ; disable interrupt\n\t"
+ "nop\n\t"
+ "nop\n\t"
+ "ld %0, [%2]\n\t"
+ "st [%2], %1\n\t"
+ "pfx 9\n\t"
+ "wrctl %1 ; enable interrupt\n\t"
+ "nop\n\t"
+ "nop\n\t"
+ : "=&r"(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");
+
+/* nios needs more because of reg windows */
+#define THREAD_MANAGER_STACK_SIZE (32*1024)
+#define STACK_SIZE (32*1024)
+
+#endif /* pt-machine.h */