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/*
* linux/include/asm-m68k/system.h
*
* Copyright (C) 1991, 1992 Linus Torvalds
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file README.legal in the main directory of this archive
* for more details.
*/
/*
* 680x0 support added by Hamish Macdonald
*/
#ifndef _M68K_SYSTEM_H
#define _M68K_SYSTEM_H
#include <linux/config.h> /* get configuration macros */
#if defined(CONFIG_ATARI) && !defined(CONFIG_AMIGA) && !defined(CONFIG_MAC)
/* block out HSYNC on the atari */
#define sti() __asm__ __volatile__ ("andiw #0xfbff,sr": : : "memory")
#else /* portable version */
#define sti() __asm__ __volatile__ ("andiw #0xf8ff,sr": : : "memory")
#endif /* machine compilation types */
#define cli() __asm__ __volatile__ ("oriw #0x0700,sr": : : "memory")
#define nop() __asm__ __volatile__ ("nop"::)
#define save_flags(x) \
__asm__ __volatile__("movew sr,%0":"=d" (x) : /* no input */ :"memory")
#define restore_flags(x) \
__asm__ __volatile__("movew %0,sr": /* no outputs */ :"d" (x) : "memory")
#define iret() __asm__ __volatile__ ("rte": : :"memory", "sp", "cc")
#define move_to_user_mode() \
__asm__ __volatile__ ("movel sp,usp\n\t" /* setup user sp */ \
"movec %0,msp\n\t" /* setup kernel sp */ \
"andiw #0xdfff,sr" /* return to user mode */ \
: /* no output */ \
: "r" (current->kernel_stack_page + PAGE_SIZE) \
: "memory", "sp")
static inline void clear_fpu(void) {
unsigned long nilstate = 0;
__asm__ __volatile__ ("frestore %0@" : : "a" (&nilstate));
}
#define halt() \
__asm__ __volatile__ ("halt")
#endif /* _M68K_SYSTEM_H */
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