# rtai_sched.h

    00001 /*
    00002  * Copyright (C) 1999-2003 Paolo Mantegazza <mantegazza@aero.polimi.it>
    00003  * Copyright (C) 2000      Stuart Hughes    <shughes@zentropix.com>
    00004  *
    00005  * This program is free software; you can redistribute it and/or
    00006  * modify it under the terms of the GNU General Public License as
    00007  * published by the Free Software Foundation; either version 2 of the
    00008  * License, or (at your option) any later version.
    00009  *
    00010  * This program 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
    00013  * GNU General Public License for more details.
    00014  *
    00015  * You should have received a copy of the GNU General Public License
    00016  * along with this program; if not, write to the Free Software
    00017  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
    00018  */
    00019
    00020 #ifndef _RTAI_ASM_I386_SCHED_H
    00021 #define _RTAI_ASM_I386_SCHED_H
    00022
    00023 #define rt_exchange_tasks(oldtask, newtask) \
    00024         __asm__ __volatile__( \
    00025         "pushl %%eax\n\t" \
    00026         "pushl %%ebp\n\t" \
    00027         "pushl %%edi\n\t" \
    00028         "pushl %%esi\n\t" \
    00029         "pushl %%edx\n\t" \
    00030         "pushl %%ecx\n\t" \
    00031         "pushl %%ebx\n\t" \
    00032         "pushl $1f\n\t" \
    00033         "movl (%%ecx), %%ebx\n\t" \
    00034         "movl %%esp, (%%ebx)\n\t" \
    00035         "movl (%%edx), %%esp\n\t" \
    00036         "movl %%edx, (%%ecx)\n\t" \
    00037         "ret\n\t" \
    00038 "1:     popl %%ebx\n\t \
    00039         popl %%ecx\n\t \
    00040         popl %%edx\n\t \
    00041         popl %%esi\n\t \
    00042         popl %%edi\n\t \
    00043         popl %%ebp\n\t \
    00044         popl %%eax\n\t" \
    00045         : \
    00046         : "c" (&oldtask), "d" (newtask) \
    00047         );
    00048
    00049 #define init_arch_stack() \
    00050 do { \
    00051         *--(task->stack) = data;                \
    00052         *--(task->stack) = (int) rt_thread;     \
    00053         *--(task->stack) = 0;                   \
    00054         *--(task->stack) = (int) rt_startup;    \
    00055 } while(0)
    00056
    00057 #define DEFINE_LINUX_CR0      static unsigned long linux_cr0;
    00058
    00059 #define DEFINE_LINUX_SMP_CR0  static unsigned long linux_smp_cr0[NR_RT_CPUS];
    00060
    00061 #define init_fp_env(spare_fpu_reg) \
    00062 do { \
    00063         save_cr0_and_clts(linux_cr0);   \
    00064         save_fpenv(spare_fpu_reg);      \
    00065         init_xfpu();                    \
    00066         save_fpenv(task->fpu_reg);      \
    00067         restore_fpenv(spare_fpu_reg);   \
    00068         restore_cr0(linux_cr0);         \
    00069 } while(0)
    00070
    00071 static inline void *get_stack_pointer(void)
    00072 {
    00073         void *sp;
    00074         asm volatile ("movl %%esp, %0" : "=r" (sp));
    00075         return sp;
    00076 }
    00077
    00078 #define RT_SET_RTAI_TRAP_HANDLER(x)  rt_set_rtai_trap_handler(x)
    00079
    00080 #define DO_TIMER_PROPER_OP();
    00081
    00082 #endif /* !_RTAI_ASM_I386_SCHED_H */