1 /* Machine-dependent pthreads configuration and inline functions.
3 Copyright (C) 1997, 1998 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
5 Contributed by Philip Blundell <philb@gnu.org>.
7 The GNU C Library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Library General Public License as
9 published by the Free Software Foundation; either version 2 of the
10 License, or (at your option) any later version.
12 The GNU C Library is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Library General Public License for more details.
17 You should have received a copy of the GNU Library General Public
18 License along with the GNU C Library; see the file COPYING.LIB. If not,
19 see <http://www.gnu.org/licenses/>. */
22 #define _PT_MACHINE_H 1
27 # define PT_EI __extern_always_inline
30 /* Spinlock implementation; required. */
31 /* it is weird and dangerous to disable interrupt in userspace, but for nios
32 what else we can do before we have a swap like instruction? This is better
36 testandset (int *spinlock)
40 __asm__ __volatile__("pfx 8\n\t"
41 "wrctl %1 ; disable interrupt\n\t"
47 "wrctl %1 ; enable interrupt\n\t"
51 : "r"(1), "r"(spinlock)
58 /* Get some notion of the current stack. Need not be exactly the top
59 of the stack, just something somewhere in the current frame. */
60 #define CURRENT_STACK_FRAME stack_pointer
61 register char * stack_pointer __asm__ ("%sp");
63 /* nios needs more because of reg windows */
64 #define THREAD_MANAGER_STACK_SIZE (32*1024)
65 #define STACK_SIZE (32*1024)
67 #endif /* pt-machine.h */