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/* 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 */
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