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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.

 */

/** @addtogroup mips32

 * @{

 */

/** @file

 */

#ifndef KERN_mips32_CP0_H_

#define KERN_mips32_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.

 */

#define cp0_compare_value       100000

#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))))

#define GEN_READ_CP0(nm,reg) static inline uint32_t cp0_ ##nm##_read(void) \

  { \

      uint32_t retval; \

      asm("mfc0 %0, $" #reg : "=r"(retval)); \

      return retval; \

  }

#define GEN_WRITE_CP0(nm,reg) static inline void cp0_ ##nm##_write(uint32_t val) \

 { \

    asm("mtc0 %0, $" #reg : : "r"(val) ); \

 }

GEN_READ_CP0(index, 0);

GEN_WRITE_CP0(index, 0);

GEN_READ_CP0(random, 1);

GEN_READ_CP0(entry_lo0, 2);

GEN_WRITE_CP0(entry_lo0, 2);

GEN_READ_CP0(entry_lo1, 3);

GEN_WRITE_CP0(entry_lo1, 3);

GEN_READ_CP0(context, 4);

GEN_WRITE_CP0(context, 4);

GEN_READ_CP0(pagemask, 5);

GEN_WRITE_CP0(pagemask, 5);

GEN_READ_CP0(wired, 6);

GEN_WRITE_CP0(wired, 6);

GEN_READ_CP0(badvaddr, 8);

GEN_READ_CP0(count, 9);

GEN_WRITE_CP0(count, 9);

GEN_READ_CP0(entry_hi, 10);

GEN_WRITE_CP0(entry_hi, 10);

GEN_READ_CP0(compare, 11);

GEN_WRITE_CP0(compare, 11);

GEN_READ_CP0(status, 12);

GEN_WRITE_CP0(status, 12);

GEN_READ_CP0(cause, 13);

GEN_WRITE_CP0(cause, 13);

GEN_READ_CP0(epc, 14);

GEN_WRITE_CP0(epc, 14);

GEN_READ_CP0(prid, 15);

#endif

/** @}

 */