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/*

 * Copyright (C) 2003-2004 Jakub Jermar

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * - Redistributions of source code must retain the above copyright

 *   notice, this list of conditions and the following disclaimer.

 * - Redistributions in binary form must reproduce the above copyright

 *   notice, this list of conditions and the following disclaimer in the

 *   documentation and/or other materials provided with the distribution.

 * - The name of the author may not be used to endorse or promote products

 *   derived from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR

 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES

 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.

 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,

 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#ifndef __CP0_H__

#define __CP0_H__

#include <arch/types.h>

#define cp0_status_ie_enabled_bit   (1<<0)

#define cp0_status_exl_exception_bit    (1<<1)

#define cp0_status_erl_error_bit    (1<<2)

#define cp0_status_um_bit           (1<<4)

#define cp0_status_bev_bootstrap_bit    (1<<22)

#define cp0_status_fpu_bit              (1<<29)

#define cp0_status_im_shift     8

#define cp0_status_im_mask              0xff00

#define cp0_cause_excno(cause) ((cause >> 2) & 0x1f)

#define cp0_cause_coperr(cause) ((cause >> 28) & 0x3)

#define fpu_cop_id 1

/*

 * Magic value for use in msim.

 * On AMD Duron 800Mhz, this roughly seems like one us.

 */

#define cp0_compare_value       10000

static inline void tlbp(void)

{

    __asm__ volatile ("tlbp");

}

static inline void tlbr(void)

{

    __asm__ volatile ("tlbr");

}

static inline void tlbwi(void)

{

    __asm__ volatile ("tlbwi");

}

static inline void tlbwr(void)

{

    __asm__ volatile ("tlbwr");

}

#define cp0_mask_all_int() cp0_status_write(cp0_status_read() & ~(cp0_status_im_mask))

#define cp0_unmask_all_int() cp0_status_write(cp0_status_read() | cp0_status_im_mask)

#define cp0_mask_int(it) cp0_status_write(cp0_status_read() & ~(1<<(cp0_status_im_shift+(it))))

#define cp0_unmask_int(it) cp0_status_write(cp0_status_read() | (1<<(cp0_status_im_shift+(it))))

extern  __u32 cp0_index_read(void);

extern void cp0_idnex_write(__u32 val);

extern __u32 cp0_random_read(void);

extern __u32 cp0_entry_lo0_read(void);

extern void cp0_entry_lo0_write(__u32 val);

extern __u32 cp0_entry_lo1_read(void);

extern void cp0_entry_lo1_write(__u32 val);

extern __u32 cp0_context_read(void);

extern void cp0_context_write(__u32 val);

extern __u32 cp0_pagemask_read(void);

extern void cp0_pagemask_write(__u32 val);

extern __u32 cp0_wired_read(void);

extern void cp0_wired_write(__u32 val);

extern __u32 cp0_badvaddr_read(void);

extern volatile __u32 cp0_count_read(void);

extern void cp0_count_write(__u32 val);

extern volatile __u32 cp0_entry_hi_read(void);

extern void cp0_entry_hi_write(__u32 val);

extern volatile __u32 cp0_compare_read(void);

extern void cp0_compare_write(__u32 val);

extern __u32 cp0_status_read(void);

extern void cp0_status_write(__u32 val);

extern __u32 cp0_cause_read(void);

extern void cp0_cause_write(__u32 val);

extern __u32 cp0_epc_read(void);

extern void cp0_epc_write(__u32 val);

extern __u32 cp0_prid_read(void);

#endif