lxdream 0.9.1| filename | src/sh4/sh4trans.h |
| changeset | 1091:186558374345 |
| prev | 1065:bc1cc0c54917 |
| next | 1125:9dd5dee45db9 |
| 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 |
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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 */
.