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authorMike Frysinger <vapier@gentoo.org>2008-01-05 10:05:27 +0000
committerMike Frysinger <vapier@gentoo.org>2008-01-05 10:05:27 +0000
commit124ec188720b6bdea85ade49e7ea195161b12fce (patch)
tree2bce39bc1e51bd587e010a61419b47d122be3165 /libpthread/linuxthreads.old/sysdeps/xtensa/pt-machine.h
parent9c95d5d28d8d40f7b826c9399f5ce781bbc61567 (diff)
Chris Zankel writes:
The following patches add support for the Xtensa processor architecture to uClibc. They are based on a recent SVN checkout (12/05/2007). The first patch (attached to this post) adds Xtensa support to various shared configuration and make files. The following patches then include the Xtensa specific files and directories. I welcome any feedback and would appreciate it if you could include the patches into the mainline tree. I am certainly committed to maintain the port. Bob Wilson was kind enough to review the patches. Some notes about the architecture: Xtensa is a configurable and extensible processor architecture developed by Tensilica. For more information, please visit: www.linux-xtensa.org.
Diffstat (limited to 'libpthread/linuxthreads.old/sysdeps/xtensa/pt-machine.h')
-rw-r--r--libpthread/linuxthreads.old/sysdeps/xtensa/pt-machine.h48
1 files changed, 48 insertions, 0 deletions
diff --git a/libpthread/linuxthreads.old/sysdeps/xtensa/pt-machine.h b/libpthread/linuxthreads.old/sysdeps/xtensa/pt-machine.h
new file mode 100644
index 000000000..d5ab9f0ec
--- /dev/null
+++ b/libpthread/linuxthreads.old/sysdeps/xtensa/pt-machine.h
@@ -0,0 +1,48 @@
+/* Machine-dependent pthreads configuration and inline functions.
+ Xtensa version.
+
+ Copyright (C) 2007 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; if not, write to the Free
+ Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
+ Boston, MA 02110-1301, USA. */
+
+#ifndef _PT_MACHINE_H
+#define _PT_MACHINE_H 1
+
+#include <sys/syscall.h>
+#include <asm/unistd.h>
+
+#ifndef PT_EI
+# define PT_EI extern inline
+#endif
+
+/* Memory barrier. */
+#define MEMORY_BARRIER() __asm__ ("memw" : : : "memory")
+
+/* Spinlock implementation; required. */
+PT_EI long int
+testandset (int *spinlock)
+{
+ int unused = 0;
+ return INTERNAL_SYSCALL (xtensa, , 4, SYS_XTENSA_ATOMIC_SET,
+ spinlock, 1, unused);
+}
+
+/* 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 __builtin_frame_address (0)
+
+#endif /* _PT_MACHINE_H */