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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, see <http://www.gnu.org/licenses/>. */ #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 oldvalue = 1; 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 */ |