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- /* 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 */
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