| /* Machine-dependent pthreads configuration and inline functions. |
| Xtensa version. |
| |
| Copyright (C) 2007 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; if not, write to the Free |
| Software Foundation, Inc., 51 Franklin Street - Fifth Floor, |
| Boston, MA 02110-1301, USA. */ |
| |
| #ifndef _PT_MACHINE_H |
| #define _PT_MACHINE_H 1 |
| |
| #include <sys/syscall.h> |
| #include <asm/unistd.h> |
| |
| #ifndef PT_EI |
| # define PT_EI __extern_always_inline |
| #endif |
| |
| /* Memory barrier. */ |
| #define MEMORY_BARRIER() __asm__ ("memw" : : : "memory") |
| |
| /* Spinlock implementation; required. */ |
| PT_EI long int |
| testandset (int *spinlock) |
| { |
| int unused = 0; |
| return INTERNAL_SYSCALL (xtensa, , 4, SYS_XTENSA_ATOMIC_SET, |
| spinlock, 1, unused); |
| } |
| |
| /* 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 __builtin_frame_address (0) |
| |
| #endif /* _PT_MACHINE_H */ |