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/* Machine-dependent pthreads configuration and inline functions.
OpenRISC version.
Copyright (C) 2001, 2002, 2003 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
#include <features.h>
#include <sys/syscall.h>
#ifndef PT_EI
# define PT_EI __extern_always_inline
#endif
PT_EI long int testandset(int*);
#define OR1K_ATOMIC_XCHG 1
PT_EI long int
testandset (int *spinlock)
{
int err;
int oldvalue = 1;
err = INLINE_SYSCALL(or1k_atomic, 3, OR1K_ATOMIC_XCHG, spinlock, &oldvalue);
return (oldvalue);
}
/* 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()
static inline char *stack_pointer(void)
{
unsigned long ret;
__asm__ __volatile__ ("l.ori %0, r1, 0" : "=r" (ret));
return (char *)ret;
}
#endif /* pt-machine.h */
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