| /* Machine-dependent pthreads configuration and inline functions. |
| ARM version. |
| Copyright (C) 1997, 1998 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Philip Blundell <philb@gnu.org>. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Library General Public License as |
| published by the Free Software Foundation; either version 2 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 |
| Library General Public License for more details. |
| |
| You should have received a copy of the GNU Library 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 |
| |
| /* Spinlock implementation; required. */ |
| /* it is weird and dangerous to disable interrupt in userspace, but for nios |
| what else we can do before we have a swap like instruction? This is better |
| than nothing |
| */ |
| PT_EI long int |
| testandset (int *spinlock) |
| { |
| unsigned int ret; |
| |
| __asm__ __volatile__("pfx 8\n\t" |
| "wrctl %1 ; disable interrupt\n\t" |
| "nop\n\t" |
| "nop\n\t" |
| "ld %0, [%2]\n\t" |
| "st [%2], %1\n\t" |
| "pfx 9\n\t" |
| "wrctl %1 ; enable interrupt\n\t" |
| "nop\n\t" |
| "nop\n\t" |
| : "=&r"(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"); |
| |
| /* nios needs more because of reg windows */ |
| #define THREAD_MANAGER_STACK_SIZE (32*1024) |
| #define STACK_SIZE (32*1024) |
| |
| #endif /* pt-machine.h */ |