Subversion Repositories or1k

/*

 * This file is subject to the terms and conditions of the GNU General Public

 * License.  See the file "COPYING" in the main directory of this archive

 * for more details.

 *

 * Copyright (C) 2003 Ralf Baechle

 */

#ifndef _ASM_HAZARDS_H

#define _ASM_HAZARDS_H

#include <linux/config.h>

#ifdef __ASSEMBLY__

/*

 * RM9000 hazards.  When the JTLB is updated by tlbwi or tlbwr, a subsequent

 * use of the JTLB for instructions should not occur for 4 cpu cycles and use

 * for data translations should not occur for 3 cpu cycles.

 */

#ifdef CONFIG_CPU_RM9000

#define rm9000_tlb_hazard                                               \

        .set    mips32;                                                 \

        ssnop; ssnop; ssnop; ssnop;                                     \

        .set    mips0

#else

#define rm9000_tlb_hazard

#endif

#else

/*

 * RM9000 hazards.  When the JTLB is updated by tlbwi or tlbwr, a subsequent

 * use of the JTLB for instructions should not occur for 4 cpu cycles and use

 * for data translations should not occur for 3 cpu cycles.

 */

#ifdef CONFIG_CPU_RM9000

#define rm9000_tlb_hazard()                                             \

        __asm__ __volatile__(                                           \

                ".set\tmips32\n\t"                                      \

                "ssnop; ssnop; ssnop; ssnop\n\t"                        \

                ".set\tmips0")

#else

#define rm9000_tlb_hazard() do { } while (0)

#endif

#endif

#endif /* _ASM_HAZARDS_H */