lxdream 0.9.1| filename | src/sh4/sh4trans.h |
| changeset | 577:a181aeacd6e8 |
| prev | 571:9bc09948d0f2 |
| next | 585:371342a39c09 |
| author | nkeynes |
| date | Mon Jan 14 10:23:49 2008 +0000 (16 years ago) |
| branch | lxdream-mmu |
| permissions | -rw-r--r-- |
| last change | Remove asm file and convert to inline (easier to cope with platform conventions) Add breakpoint support Add MMU store-queue support |
| 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 #include "sh4/xltcache.h"
20 #include "dream.h"
21 #include "mem.h"
23 /** Maximum size of a translated instruction, in bytes. This includes potentially
24 * writing the entire epilogue
25 */
26 #define MAX_INSTRUCTION_SIZE 256
27 /** Maximum size of the translation epilogue (current real size is 116 bytes, so
28 * allows a little room
29 */
30 #define EPILOGUE_SIZE 128
32 /** Maximum number of recovery records for a translated block (2048 based on
33 * 1 record per SH4 instruction in a 4K page).
34 */
35 #define MAX_RECOVERY_SIZE 2048
37 /**
38 * Translation flag - exit the current block but continue (eg exception handling)
39 */
40 #define XLAT_EXIT_CONTINUE 1
42 /**
43 * Translation flag - exit the current block and halt immediately (eg fatal error)
44 */
45 #define XLAT_EXIT_HALT 2
47 /**
48 * Translation flag - exit the current block and halt immediately for a system
49 * breakpoint.
50 */
51 #define XLAT_EXIT_BREAKPOINT 3
53 /**
54 */
55 uint32_t sh4_xlat_run_slice( uint32_t nanosecs );
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 );
64 extern uint8_t *xlat_output;
65 extern struct xlat_recovery_record xlat_recovery[MAX_RECOVERY_SIZE];
66 extern uint32_t xlat_recovery_posn;
68 /******************************************************************************
69 * Code generation - these methods must be provided by the
70 * actual code gen (eg sh4x86.c)
71 ******************************************************************************/
73 #define TARGET_X86 1
74 #define TARGET_X86_64 2
76 void sh4_translate_begin_block( sh4addr_t pc );
77 uint32_t sh4_translate_instruction( sh4addr_t pc );
78 void sh4_translate_end_block( sh4addr_t pc );
80 typedef void (*unwind_thunk_t)(void);
82 /**
83 * From within the translator, (typically called from MMU exception handling routines)
84 * immediately exit the current translation block (performing cleanup as necessary) and
85 * return to sh4_xlat_run_slice(). Effectively a fast longjmp w/ xlat recovery.
86 *
87 * Note: The correct working of this method depends on the translator anticipating the
88 * exception and generating the appropriate recovery block(s) - currently this means
89 * that it should ONLY be called from within the context of a memory read or write.
90 *
91 * @param is_completion If TRUE, exit after completing the current instruction (effectively),
92 * otherwise abort the current instruction with no effect.
93 * @param thunk A function to execute after perform xlat recovery, but before returning
94 * to run_slice. If NULL, control returns directly.
95 * @return This method never returns.
96 */
97 void sh4_translate_unwind_stack( gboolean is_completion, unwind_thunk_t thunk );
99 /**
100 * From within the translator, immediately exit the current translation block with
101 * the specified exit code (one of the XLAT_EXIT_* values).
102 */
103 void sh4_translate_exit( int exit_code );
.