filename | src/sh4/sh4trans.h |
changeset | 1218:be02e87f9f87 |
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author | nkeynes |
date | Tue Feb 28 18:22:52 2012 +1000 (12 years ago) |
permissions | -rw-r--r-- |
last change | Add a GL-only video driver for android usage (since the Java code is responsible for creating the context) |
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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 139
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 typedef void (*xlat_block_begin_callback_t)();
45 typedef void (*xlat_block_end_callback_t)();
47 /**
48 */
49 uint32_t sh4_translate_run_slice( uint32_t nanosecs );
51 /**
52 * Initialize the translation engine (if required). Note xlat cache
53 * must already be initialized.
54 */
55 void sh4_translate_init( void);
57 /**
58 * Translate the specified block of code starting from the specified start
59 * address until the first branch/jump instruction.
60 */
61 void *sh4_translate_basic_block( sh4addr_t start );
63 /**
64 * Add a recovery record for the current code generation position, with the
65 * specified instruction count
66 */
67 void sh4_translate_add_recovery( uint32_t icount );
69 /**
70 * Initialize shadow execution mode
71 */
72 void sh4_shadow_init( void );
74 extern uint8_t *xlat_output;
75 extern struct xlat_recovery_record xlat_recovery[MAX_RECOVERY_SIZE];
76 extern xlat_cache_block_t xlat_current_block;
77 extern uint32_t xlat_recovery_posn;
79 /******************************************************************************
80 * Code generation - these methods must be provided by the
81 * actual code gen (eg sh4x86.c)
82 ******************************************************************************/
84 #define TARGET_X86 1
86 void sh4_translate_begin_block( sh4addr_t pc );
87 uint32_t sh4_translate_instruction( sh4addr_t pc );
88 void sh4_translate_end_block( sh4addr_t pc );
89 uint32_t sh4_translate_end_block_size();
90 void sh4_translate_emit_breakpoint( sh4vma_t pc );
91 void sh4_translate_crashdump();
93 typedef void (*unwind_thunk_t)(void);
95 /**
96 * Set instrumentation callbacks
97 */
98 void sh4_translate_set_callbacks( xlat_block_begin_callback_t begin, xlat_block_end_callback_t end );
100 /**
101 * Enable/disable memory optimizations that bypass the mmu
102 */
103 void sh4_translate_set_fastmem( gboolean flag );
105 /**
106 * Set the address spaces for the translated code.
107 */
108 void sh4_translate_set_address_space( struct mem_region_fn **priv, struct mem_region_fn **user );
110 /**
111 * From within the translator, (typically called from MMU exception handling routines)
112 * immediately exit the current translation block (performing cleanup as necessary) and
113 * return to sh4_translate_run_slice(). Effectively a fast longjmp w/ xlat recovery.
114 *
115 * Note: The correct working of this method depends on the translator anticipating the
116 * exception and generating the appropriate recovery block(s) - currently this means
117 * that it should ONLY be called from within the context of a memory read or write.
118 *
119 * @param is_completion If TRUE, exit after completing the current instruction (effectively),
120 * otherwise abort the current instruction with no effect.
121 * @param thunk A function to execute after perform xlat recovery, but before returning
122 * to run_slice. If NULL, control returns directly.
123 * @return This method never returns.
124 */
125 void sh4_translate_unwind_stack( gboolean is_completion, unwind_thunk_t thunk );
127 /**
128 * Called when doing a break out of the translator - finalizes the system state up to
129 * the end of the current instruction.
130 */
131 void sh4_translate_exit_recover( );
133 /**
134 * Called when doing a break out of the translator following a taken exception -
135 * finalizes the system state up to the start of the current instruction.
136 */
137 void sh4_translate_exception_exit_recover( );
139 /**
140 * From within the translator, exit the current block at the end of the
141 * current instruction, flush the translation cache (completely)
142 * @return TRUE to perform a vm-exit/continue after the flush
143 */
144 gboolean sh4_translate_flush_cache( void );
146 /**
147 * Given a block's use_list, remove all direct links to the block.
148 */
149 void sh4_translate_unlink_block( void *use_list );
151 /**
152 * Support function called from the translator when a breakpoint is hit.
153 * Either returns immediately (to skip the breakpoint), or aborts the current
154 * cycle and never returns.
155 */
156 void FASTCALL sh4_translate_breakpoint_hit( sh4vma_t pc );
158 /**
159 * Disassemble the given translated code block, and it's source SH4 code block
160 * side-by-side. The current native pc will be marked if non-null.
161 */
162 void sh4_translate_disasm_block( FILE *out, void *code, sh4addr_t source_start, void *native_pc );
164 /**
165 * Dump the top N blocks in the SH4 translation cache
166 */
167 void sh4_translate_dump_cache_by_activity( unsigned int topN );
169 #ifdef __cplusplus
170 }
171 #endif
173 #endif /* !lxdream_sh4trans_H */
.