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- /* Machine-dependent pthreads configuration and inline functions.
- nios2 version.
- Copyright (C) 1996, 1998, 2000, 2002 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, see <http://www.gnu.org/licenses/>. */
- #ifndef _PT_MACHINE_H
- #define _PT_MACHINE_H 1
- #include <features.h>
- #ifndef PT_EI
- # define PT_EI __extern_always_inline
- #endif
- /* Spinlock implementation; required. */
- PT_EI long int
- testandset (int *spinlock)
- {
- unsigned int scratch;
- long int ret=-2;
- __asm__ __volatile__(
- "rdctl %0, status\n\t"
- "and %0, %0, %1\n\t"
- "wrctl status, %0 #disable interrupts\n\t"
- "ldw %1, 0(%4)\n\t"
- "stw %3, 0(%4)\n\t"
- "ori %0, %0, 1\n\t"
- "wrctl status, %0 #enable interrupts\n\t"
- : "=&r"(scratch), "=r"(ret)
- : "1"(ret), "r"(1), "r"(spinlock)
- : "memory");
- return ret;
- }
- /* 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
- register char * stack_pointer __asm__ ("%sp");
- #endif /* pt-machine.h */
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