| /* Machine-dependent pthreads configuration and inline functions. |
| CRIS 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> |
| |
| #ifndef PT_EI |
| # define PT_EI __extern_always_inline |
| #endif |
| |
| PT_EI long int |
| testandset (int *spinlock) |
| { |
| register unsigned long int ret; |
| |
| /* Note the use of a dummy output of *spinlock to expose the write. The |
| memory barrier is to stop *other* writes being moved past this code. */ |
| |
| #ifdef __arch_v32 |
| __asm__ __volatile__("clearf p\n" |
| "0:\n\t" |
| "movu.b [%2],%0\n\t" |
| "ax\n\t" |
| "move.b %3,[%2]\n\t" |
| "bcs 0b\n\t" |
| "clearf p" |
| : "=&r" (ret), "=m" (*spinlock) |
| : "r" (spinlock), "r" ((int) 1), "m" (*spinlock) |
| : "memory"); |
| #else /* not __arch_v32 */ |
| __asm__ __volatile__("clearf\n" |
| "0:\n\t" |
| "movu.b [%2],%0\n\t" |
| "ax\n\t" |
| "move.b %3,[%2]\n\t" |
| "bwf 0b\n\t" |
| "clearf" |
| : "=&r" (ret), "=m" (*spinlock) |
| : "r" (spinlock), "r" ((int) 1), "m" (*spinlock) |
| : "memory"); |
| #endif /* __arch_v32 */ |
| 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. |
| I don't trust register variables, so let's do this the safe way. */ |
| #define CURRENT_STACK_FRAME \ |
| ({ char *sp; __asm__ ("move.d $sp,%0" : "=rm" (sp)); sp; }) |
| |
| #endif /* pt-machine.h */ |