/*
 * 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) 2014 Imagination Technologies Ltd.
 * Author: Markos Chandras <markos.chandras@imgtec.com>
 */

#ifndef __ASM_MIPS_R2_TO_R6_EMUL_H
#define __ASM_MIPS_R2_TO_R6_EMUL_H

struct mips_r2_emulator_stats {
        u64 movs;
        u64 hilo;
        u64 muls;
        u64 divs;
        u64 dsps;
        u64 bops;
        u64 traps;
        u64 fpus;
        u64 loads;
        u64 stores;
        u64 llsc;
        u64 dsemul;
};

struct mips_r2br_emulator_stats {
        u64 jrs;
        u64 bltzl;
        u64 bgezl;
        u64 bltzll;
        u64 bgezll;
        u64 bltzall;
        u64 bgezall;
        u64 bltzal;
        u64 bgezal;
        u64 beql;
        u64 bnel;
        u64 blezl;
        u64 bgtzl;
};

#ifdef CONFIG_DEBUG_FS

#define MIPS_R2_STATS(M)                                                \
do {                                                                    \
        u32 nir;                                                        \
        int err;                                                        \
                                                                        \
        preempt_disable();                                              \
        __this_cpu_inc(mipsr2emustats.M);                               \
        err = __get_user(nir, (u32 __user *)regs->cp0_epc);             \
        if (!err) {                                                     \
                if (nir == BREAK_MATH(0))                               \
                        __this_cpu_inc(mipsr2bdemustats.M);             \
        }                                                               \
        preempt_enable();                                               \
} while (0)

#define MIPS_R2BR_STATS(M)                                      \
do {                                                            \
        preempt_disable();                                      \
        __this_cpu_inc(mipsr2bremustats.M);                     \
        preempt_enable();                                       \
} while (0)

#else

#define MIPS_R2_STATS(M)          do { } while (0)
#define MIPS_R2BR_STATS(M)        do { } while (0)

#endif /* CONFIG_DEBUG_FS */

struct r2_decoder_table {
        u32     mask;
        u32     code;
        int     (*func)(struct pt_regs *regs, u32 inst);
};


extern void do_trap_or_bp(struct pt_regs *regs, unsigned int code, int si_code,
                          const char *str);

#ifndef CONFIG_MIPSR2_TO_R6_EMULATOR
static int mipsr2_emulation;
static inline int mipsr2_decoder(struct pt_regs *regs, u32 inst,
                                 unsigned long *fcr31)
{
        return 0;
};
#else
/* MIPS R2 Emulator ON/OFF */
extern int mipsr2_emulation;
extern int mipsr2_decoder(struct pt_regs *regs, u32 inst,
                          unsigned long *fcr31);
#endif /* CONFIG_MIPSR2_TO_R6_EMULATOR */

#define NO_R6EMU        (cpu_has_mips_r6 && !mipsr2_emulation)

#endif /* __ASM_MIPS_R2_TO_R6_EMUL_H */