/*
 * 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) 2009 Wind River Systems,
 *   written by Ralf Baechle <ralf@linux-mips.org>
 */
#ifndef __ASM_COP2_H
#define __ASM_COP2_H

#include <linux/notifier.h>

#if defined(CONFIG_CPU_CAVIUM_OCTEON)

extern void octeon_cop2_save(struct octeon_cop2_state *);
extern void octeon_cop2_restore(struct octeon_cop2_state *);

#define cop2_save(r)            octeon_cop2_save(&(r)->thread.cp2)
#define cop2_restore(r)         octeon_cop2_restore(&(r)->thread.cp2)

#define cop2_present            1
#define cop2_lazy_restore       1

#elif defined(CONFIG_CPU_LOONGSON64)

#define cop2_present            1
#define cop2_lazy_restore       1
#define cop2_save(r)            do { (void)(r); } while (0)
#define cop2_restore(r)         do { (void)(r); } while (0)

#else

#define cop2_present            0
#define cop2_lazy_restore       0
#define cop2_save(r)            do { (void)(r); } while (0)
#define cop2_restore(r)         do { (void)(r); } while (0)
#endif

enum cu2_ops {
        CU2_EXCEPTION,
        CU2_LWC2_OP,
        CU2_LDC2_OP,
        CU2_SWC2_OP,
        CU2_SDC2_OP,
};

extern int register_cu2_notifier(struct notifier_block *nb);
extern int cu2_notifier_call_chain(unsigned long val, void *v);

#define cu2_notifier(fn, pri)                                           \
({                                                                      \
        static struct notifier_block fn##_nb = {                        \
                .notifier_call = fn,                                    \
                .priority = pri                                         \
        };                                                              \
                                                                        \
        register_cu2_notifier(&fn##_nb);                                \
})

#endif /* __ASM_COP2_H */