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/* Machine-dependent pthreads configuration and inline functions.
C6x version.
Copyright (C) 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Aurelien Jacquiot <aurelien.jacquiot@jaluna.com>.
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
#ifndef PT_EI
# define PT_EI extern inline
#endif
extern int __compare_and_swap (long int *p, long int oldval, long int newval);
/* Spinlock implementation; required. */
static inline long int
testandset (int *spinlock)
{
register unsigned int ret = 1;
int dummy;
__asm__ __volatile__ ("mvc .s2 CSR, %0\n\tand .s2 -2, %0, %0\n\tmvc .s2 %0, CSR\n"
: "=b" (dummy));
if (*spinlock == 0) {
*spinlock = 1;
ret = 0;
}
__asm__ __volatile__ ("mvc .s2 CSR, %0\n\tor .s2 1, %0, %0\n\tmvc .s2 %0, CSR\n"
: "=b" (dummy));
return ret;
}
#define WRITE_MEMORY_BARRIER()
#define READ_MEMORY_BARRIER()
/* 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 get_stack_pointer()
static inline char * get_stack_pointer(void)
{
char *sp;
__asm__ __volatile__ ("mv .d2 B15, %0" : "=b" (sp));
return sp;
}
#define THREAD_STACK_OFFSET 8
#endif /* pt-machine.h */
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