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lxdream.org :: lxdream/src/sh4/sh4trans.h
lxdream 0.9.1
released Jun 29
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filename src/sh4/sh4trans.h
changeset 1091:186558374345
prev1065:bc1cc0c54917
next1125:9dd5dee45db9
author nkeynes
date Tue Dec 15 08:46:37 2009 +1000 (11 years ago)
permissions -rw-r--r--
last change Add side-by-side x86+sh4 disassembly output
Print SH4 state information and disassembly of the current block when
crashing.
Fix delay slot instruction in conditional branch not being marked as a
delay-slot instruction in the branch-not-taken path.
Rename REG_* defines in cpu.h to avoid conflict with translation defs
view annotate diff log raw
     1 /**
     2  * $Id$
     3  * 
     4  * SH4->x86 translation module
     5  *
     6  * Copyright (c) 2005 Nathan Keynes.
     7  *
     8  * This program is free software; you can redistribute it and/or modify
     9  * it under the terms of the GNU General Public License as published by
    10  * the Free Software Foundation; either version 2 of the License, or
    11  * (at your option) any later version.
    12  *
    13  * This program is distributed in the hope that it will be useful,
    14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
    15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    16  * GNU General Public License for more details.
    17  */
    19 #ifndef lxdream_sh4trans_H
    20 #define lxdream_sh4trans_H 1
    22 #include "xlat/xltcache.h"
    23 #include "dream.h"
    24 #include "mem.h"
    26 #ifdef __cplusplus
    27 extern "C" {
    28 #endif
    30 /** Maximum size of a translated instruction, in bytes. Current worst case seems
    31  * to be a BF/S followed by one of the long FMOVs.
    32  */
    33 #define MAX_INSTRUCTION_SIZE 512
    34 /** Maximum size of the translation epilogue (current real size is 116 bytes, so
    35  * allows a little room
    36  */
    37 #define EPILOGUE_SIZE 136
    39 /** Maximum number of recovery records for a translated block (2048 based on
    40  * 1 record per SH4 instruction in a 4K page).
    41  */
    42 #define MAX_RECOVERY_SIZE 2049
    44 /**
    45  */
    46 uint32_t sh4_translate_run_slice( uint32_t nanosecs );
    48 /**
    49  * Initialize the translation engine (if required). Note xlat cache
    50  * must already be initialized.
    51  */
    52 void sh4_translate_init( void);
    54 /**
    55  * Translate the specified block of code starting from the specified start
    56  * address until the first branch/jump instruction.
    57  */
    58 void *sh4_translate_basic_block( sh4addr_t start );
    60 /**
    61  * Add a recovery record for the current code generation position, with the
    62  * specified instruction count
    63  */
    64 void sh4_translate_add_recovery( uint32_t icount );
    66 extern uint8_t *xlat_output;
    67 extern struct xlat_recovery_record xlat_recovery[MAX_RECOVERY_SIZE];
    68 extern xlat_cache_block_t xlat_current_block;
    69 extern uint32_t xlat_recovery_posn;
    71 /******************************************************************************
    72  * Code generation - these methods must be provided by the
    73  * actual code gen (eg sh4x86.c) 
    74  ******************************************************************************/
    76 #define TARGET_X86 1
    78 void sh4_translate_begin_block( sh4addr_t pc );
    79 uint32_t sh4_translate_instruction( sh4addr_t pc );
    80 void sh4_translate_end_block( sh4addr_t pc );
    81 uint32_t sh4_translate_end_block_size();
    82 void sh4_translate_emit_breakpoint( sh4vma_t pc );
    83 void sh4_translate_crashdump();
    85 typedef void (*unwind_thunk_t)(void);
    87 /**
    88  * From within the translator, (typically called from MMU exception handling routines)
    89  * immediately exit the current translation block (performing cleanup as necessary) and
    90  * return to sh4_translate_run_slice(). Effectively a fast longjmp w/ xlat recovery.
    91  *
    92  * Note: The correct working of this method depends on the translator anticipating the
    93  * exception and generating the appropriate recovery block(s) - currently this means 
    94  * that it should ONLY be called from within the context of a memory read or write.
    95  *
    96  * @param is_completion If TRUE, exit after completing the current instruction (effectively),
    97  *   otherwise abort the current instruction with no effect. 
    98  * @param thunk A function to execute after perform xlat recovery, but before returning
    99  * to run_slice. If NULL, control returns directly.
   100  * @return This method never returns. 
   101  */
   102 void sh4_translate_unwind_stack( gboolean is_completion, unwind_thunk_t thunk );
   104 /**
   105  * Called when doing a break out of the translator - finalizes the system state up to
   106  * the end of the current instruction.
   107  */
   108 void sh4_translate_exit_recover( );
   110 /**
   111  * Called when doing a break out of the translator following a taken exception - 
   112  * finalizes the system state up to the start of the current instruction.
   113  */
   114 void sh4_translate_exception_exit_recover( );
   116 /**
   117  * From within the translator, exit the current block at the end of the 
   118  * current instruction, flush the translation cache (completely) 
   119  * @return TRUE to perform a vm-exit/continue after the flush
   120  */
   121 gboolean sh4_translate_flush_cache( void );
   123 /**
   124  * Support function called from the translator when a breakpoint is hit.
   125  * Either returns immediately (to skip the breakpoint), or aborts the current
   126  * cycle and never returns.
   127  */
   128 void FASTCALL sh4_translate_breakpoint_hit( sh4vma_t pc );
   130 /**
   131  * Disassemble the given translated code block, and it's source SH4 code block
   132  * side-by-side. The current native pc will be marked if non-null.
   133  */
   134 void sh4_translate_disasm_block( FILE *out, void *code, sh4addr_t source_start, void *native_pc );
   136 #ifdef __cplusplus
   137 }
   138 #endif
   140 #endif /* !lxdream_sh4trans_H */
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