rtai-core/include/asm-ppc/rtai_sched.h

00001 /*
00002 COPYRIGHT (C) 2000  Paolo Mantegazza (mantegazza@aero.polimi.it)
00003                     Stuart Hughes    (shughes@zentropix.com)
00004 
00005 This library is free software; you can redistribute it and/or
00006 modify it under the terms of the GNU Lesser General Public
00007 License as published by the Free Software Foundation; either
00008 version 2 of the License, or (at your option) any later version.
00009 
00010 This library is distributed in the hope that it will be useful,
00011 but WITHOUT ANY WARRANTY; without even the implied warranty of
00012 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013 Lesser General Public License for more details.
00014 
00015 You should have received a copy of the GNU Lesser General Public
00016 License along with this library; if not, write to the Free Software
00017 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
00018 */
00019 
00020 
00021 #ifndef RTAI_SCHED_H
00022 #define RTAI_SCHED_H
00023 
00024 extern void up_task_sw(void *, void *);
00025 
00026 #ifdef CONFIG_RTAI_ADEOS
00027 #define rt_switch_to(new_task) \
00028 do { \
00029         unsigned long flags; \
00030         rtai_hw_lock(flags); \
00031         up_task_sw(&rt_current, (new_task)); \
00032         rtai_hw_unlock(flags); \
00033 } while(0)
00034 #define RTAI_MSR_FLAGS  (MSR_KERNEL | MSR_FP | MSR_EE)
00035 #else  /* !CONFIG_RTAI_ADEOS */
00036 #define rt_switch_to(new_task) up_task_sw(&rt_current, (new_task))
00037 #define RTAI_MSR_FLAGS  (MSR_KERNEL | MSR_FP)
00038 #endif  /* CONFIG_RTAI_ADEOS */
00039 
00040 #define rt_exchange_tasks(oldtask, newtask) up_task_sw(&(oldtask), (new_task))
00041 
00042 #define init_arch_stack() \
00043 do { \
00044         *(task->stack - 28) = data;                     \
00045         *(task->stack - 29) = (int)rt_thread;           \
00046         *(task->stack - 35) = (int)rt_startup;          \
00047         *(task->stack - 36) = RTAI_MSR_FLAGS;           \
00048 } while(0)
00049 
00050 #define DEFINE_LINUX_CR0
00051 
00052 #define DEFINE_LINUX_SMP_CR0
00053 
00054 #ifdef CONFIG_RTAI_FPU_SUPPORT
00055 #define init_fp_env() \
00056 do { \
00057         memset(&task->fpu_reg, 0, sizeof(task->fpu_reg)); \
00058 }while(0)
00059 #else
00060 #define init_fp_env() do { } while(0)
00061 #endif
00062 
00063 static inline void *get_stack_pointer(void)
00064 {
00065         void *sp;
00066         asm volatile ("mr 1, %0" : "=r" (sp));
00067         return sp;
00068 }
00069 
00070 #define RT_SET_RTAI_TRAP_HANDLER(x)
00071 
00072 #define DO_TIMER_PROPER_OP()
00073 
00074 #endif

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