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  1. /*
  2.  * Copyright (C) 2003-2004 Jakub Jermar
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. #ifndef __CP0_H__
  30. #define __CP0_H__
  31.  
  32. #include <arch/types.h>
  33.  
  34. #define cp0_status_ie_enabled_bit   (1<<0)
  35. #define cp0_status_exl_exception_bit    (1<<1)
  36. #define cp0_status_erl_error_bit    (1<<2)
  37. #define cp0_status_um_bit           (1<<4)
  38. #define cp0_status_bev_bootstrap_bit    (1<<22)
  39. #define cp0_status_fpu_bit              (1<<29)
  40.  
  41. #define cp0_status_im_shift     8
  42. #define cp0_status_im_mask              0xff00
  43.  
  44. /*
  45.  * Magic value for use in msim.
  46.  * On AMD Duron 800Mhz, this roughly seems like one us.
  47.  */
  48. #define cp0_compare_value       10000
  49.  
  50. static inline void tlbp(void)
  51. {
  52.     __asm__ volatile ("tlbp");
  53. }
  54.  
  55. static inline void tlbr(void)
  56. {
  57.     __asm__ volatile ("tlbr");
  58. }
  59. static inline void tlbwi(void)
  60. {
  61.     __asm__ volatile ("tlbwi");
  62. }
  63. static inline void tlbwr(void)
  64. {
  65.     __asm__ volatile ("tlbwr");
  66. }
  67.  
  68. #define cp0_mask_all_int() cp0_status_write(cp0_status_read() & ~(cp0_status_im_mask))
  69. #define cp0_unmask_all_int() cp0_status_write(cp0_status_read() | cp0_status_im_mask)
  70. #define cp0_mask_int(it) cp0_status_write(cp0_status_read() & ~(1<<(cp0_status_im_shift+(it))))
  71. #define cp0_unmask_int(it) cp0_status_write(cp0_status_read() | (1<<(cp0_status_im_shift+(it))))
  72.  
  73.  
  74. extern  __u32 cp0_index_read(void);
  75. extern void cp0_idnex_write(__u32 val);
  76.  
  77. extern __u32 cp0_random_read(void);
  78.  
  79. extern __u32 cp0_entry_lo0_read(void);
  80. extern void cp0_entry_lo0_write(__u32 val);
  81.  
  82. extern __u32 cp0_entry_lo1_read(void);
  83. extern void cp0_entry_lo1_write(__u32 val);
  84.  
  85. extern __u32 cp0_context_read(void);
  86. extern void cp0_context_write(__u32 val);
  87.  
  88. extern __u32 cp0_pagemask_read(void);
  89. extern void cp0_pagemask_write(__u32 val);
  90.  
  91. extern __u32 cp0_wired_read(void);
  92. extern void cp0_wired_write(__u32 val);
  93.  
  94. extern __u32 cp0_badvaddr_read(void);
  95.  
  96. extern volatile __u32 cp0_count_read(void);
  97. extern void cp0_count_write(__u32 val);
  98.  
  99. extern volatile __u32 cp0_entry_hi_read(void);
  100. extern void cp0_entry_hi_write(__u32 val);
  101.  
  102. extern volatile __u32 cp0_compare_read(void);
  103. extern void cp0_compare_write(__u32 val);
  104.  
  105. extern __u32 cp0_status_read(void);
  106. extern void cp0_status_write(__u32 val);
  107.  
  108. extern __u32 cp0_cause_read(void);
  109. extern void cp0_cause_write(__u32 val);
  110.  
  111. extern __u32 cp0_epc_read(void);
  112. extern void cp0_epc_write(__u32 val);
  113.  
  114. extern __u32 cp0_prid_read(void);
  115.  
  116. #endif
  117.