From 124ec188720b6bdea85ade49e7ea195161b12fce Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Sat, 5 Jan 2008 10:05:27 +0000 Subject: 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. --- .../linuxthreads.old/sysdeps/xtensa/pt-machine.h | 48 ++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 libpthread/linuxthreads.old/sysdeps/xtensa/pt-machine.h (limited to 'libpthread/linuxthreads.old/sysdeps/xtensa') 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 +#include + +#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 */ -- cgit v1.2.3