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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 __mips32_CP0_H__
  30. #define __mips32_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. #define cp0_cause_excno(cause) ((cause >> 2) & 0x1f)
  45. #define cp0_cause_coperr(cause) ((cause >> 28) & 0x3)
  46.  
  47. #define fpu_cop_id 1
  48.  
  49. /*
  50.  * Magic value for use in msim.
  51.  * On AMD Duron 800Mhz, this roughly seems like one us.
  52.  */
  53. #define cp0_compare_value       10000
  54.  
  55. static inline void tlbp(void)
  56. {
  57.     __asm__ volatile ("tlbp");
  58. }
  59.  
  60. static inline void tlbr(void)
  61. {
  62.     __asm__ volatile ("tlbr");
  63. }
  64. static inline void tlbwi(void)
  65. {
  66.     __asm__ volatile ("tlbwi");
  67. }
  68. static inline void tlbwr(void)
  69. {
  70.     __asm__ volatile ("tlbwr");
  71. }
  72.  
  73. #define cp0_mask_all_int() cp0_status_write(cp0_status_read() & ~(cp0_status_im_mask))
  74. #define cp0_unmask_all_int() cp0_status_write(cp0_status_read() | cp0_status_im_mask)
  75. #define cp0_mask_int(it) cp0_status_write(cp0_status_read() & ~(1<<(cp0_status_im_shift+(it))))
  76. #define cp0_unmask_int(it) cp0_status_write(cp0_status_read() | (1<<(cp0_status_im_shift+(it))))
  77.  
  78.  
  79. extern  __u32 cp0_index_read(void);
  80. extern void cp0_idnex_write(__u32 val);
  81.  
  82. extern __u32 cp0_random_read(void);
  83.  
  84. extern __u32 cp0_entry_lo0_read(void);
  85. extern void cp0_entry_lo0_write(__u32 val);
  86.  
  87. extern __u32 cp0_entry_lo1_read(void);
  88. extern void cp0_entry_lo1_write(__u32 val);
  89.  
  90. extern __u32 cp0_context_read(void);
  91. extern void cp0_context_write(__u32 val);
  92.  
  93. extern __u32 cp0_pagemask_read(void);
  94. extern void cp0_pagemask_write(__u32 val);
  95.  
  96. extern __u32 cp0_wired_read(void);
  97. extern void cp0_wired_write(__u32 val);
  98.  
  99. extern __u32 cp0_badvaddr_read(void);
  100.  
  101. extern volatile __u32 cp0_count_read(void);
  102. extern void cp0_count_write(__u32 val);
  103.  
  104. extern volatile __u32 cp0_entry_hi_read(void);
  105. extern void cp0_entry_hi_write(__u32 val);
  106.  
  107. extern volatile __u32 cp0_compare_read(void);
  108. extern void cp0_compare_write(__u32 val);
  109.  
  110. extern __u32 cp0_status_read(void);
  111. extern void cp0_status_write(__u32 val);
  112.  
  113. extern __u32 cp0_cause_read(void);
  114. extern void cp0_cause_write(__u32 val);
  115.  
  116. extern __u32 cp0_epc_read(void);
  117. extern void cp0_epc_write(__u32 val);
  118.  
  119. extern __u32 cp0_prid_read(void);
  120.  
  121. #endif
  122.