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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 */ |