filename | src/xlat/xltcache.h |
changeset | 991:60c7fab9c880 |
next | 1006:3a169c224c12 |
next | 1091:186558374345 |
author | nkeynes |
date | Wed Mar 04 23:12:21 2009 +0000 (15 years ago) |
permissions | -rw-r--r-- |
last change | Move xltcache to xlat/ src directory Commit new and improved x86 opcode file - cleaned up and added support for amd64 extended registers |
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1 /**
2 * $Id$
3 *
4 * Translation cache support (architecture independent)
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 "dream.h"
20 #include "mem.h"
22 #ifndef lxdream_xltcache_H
23 #define lxdream_xltcache_H 1
25 /**
26 * For now, recovery is purely a matter of mapping native pc => sh4 pc,
27 * and updating sh4r.pc & sh4r.slice_cycles accordingly. In future more
28 * detailed recovery may be required if the translator optimizes more
29 * agressively.
30 *
31 * The recovery table contains (at least) one entry per abortable instruction,
32 *
33 */
34 typedef struct xlat_recovery_record {
35 uint32_t xlat_offset; // native (translated) pc
36 uint32_t sh4_icount; // instruction number of the corresponding SH4 instruction
37 // (0 = first instruction, 1 = second instruction, ... )
38 } *xlat_recovery_record_t;
40 struct xlat_cache_block {
41 int active; /* 0 = deleted, 1 = normal. 2 = accessed (temp-space only) */
42 uint32_t size;
43 void **lut_entry; /* For deletion */
44 uint32_t xlat_sh4_mode; /* comparison with sh4r.xlat_sh4_mode */
45 uint32_t recover_table_offset; // Offset from code[0] of the recovery table;
46 uint32_t recover_table_size;
47 unsigned char code[0];
48 } __attribute__((packed));
50 typedef struct xlat_cache_block *xlat_cache_block_t;
52 #define XLAT_BLOCK_FOR_CODE(code) (((xlat_cache_block_t)code)-1)
54 #define XLAT_BLOCK_MODE(code) (XLAT_BLOCK_FOR_CODE(code)->xlat_sh4_mode)
56 /**
57 * Initialize the translation cache
58 */
59 void xlat_cache_init(void);
61 /**
62 * Returns the next block in the new cache list that can be written to by the
63 * translator.
64 */
65 xlat_cache_block_t xlat_start_block(sh4addr_t address);
67 /**
68 * Increases the current block size (only valid between calls to xlat_start_block()
69 * and xlat_commit_block()).
70 * @return the new block, which may be different from the old block.
71 */
72 xlat_cache_block_t xlat_extend_block( uint32_t newSize );
74 /**
75 * Commit the current translation block
76 * @param addr target address (for the lookup table)
77 * @param destsize final size of the translation in bytes.
78 * @param srcsize size of the original data that was translated in bytes
79 */
80 void xlat_commit_block( uint32_t destsize, uint32_t srcsize );
82 /**
83 * Dump the disassembly of the specified code block to a stream
84 * (primarily for debugging purposes)
85 * @param out The stream to write the output to
86 * @param code a translated block
87 */
88 void xlat_disasm_block( FILE *out, void *code );
91 /**
92 * Delete (deactivate) the specified block from the cache. Caller is responsible
93 * for ensuring that there really is a block there.
94 */
95 void xlat_delete_block( xlat_cache_block_t block );
97 /**
98 * Retrieve the entry point for the translated code corresponding to the given
99 * SH4 address, or NULL if there is no code for that address.
100 */
101 void * FASTCALL xlat_get_code( sh4addr_t address );
103 /**
104 * Retrieve the pre-instruction recovery record corresponding to the given
105 * native address, or NULL if there is no recovery code for the address.
106 * @param code The code block containing the recovery table.
107 * @param native_pc A pointer that must be within the currently executing
108 * return the first record before or equal to the given pc.
109 * translation block.
110 */
111 struct xlat_recovery_record *xlat_get_pre_recovery( void *code, void *native_pc );
114 /**
115 * Retrieve the entry point for the translated code corresponding to the given
116 * SH4 virtual address, or NULL if there is no code for the address.
117 * If the virtual address cannot be resolved, this method will raise a TLB miss
118 * exception, and return NULL.
119 */
120 void * FASTCALL xlat_get_code_by_vma( sh4vma_t address );
122 /**
123 * Retrieve the address of the lookup table entry corresponding to the
124 * given SH4 address.
125 */
126 void ** FASTCALL xlat_get_lut_entry( sh4addr_t address );
128 /**
129 * Retrieve the current host address of the running translated code block.
130 * @return the host PC, or null if there is no currently executing translated
131 * block (or the stack is corrupted)
132 * Note: the implementation of this method is host (and calling-convention) specific.
133 * @param block_start start of the block the PC should be in
134 * @param block_size size of the code block in bytes.
135 */
136 void *xlat_get_native_pc( void *block_start, uint32_t block_size );
138 /**
139 * Retrieve the size of the block starting at the specified pointer. If the
140 * pointer is not a valid code block, the return value is undefined.
141 */
142 uint32_t FASTCALL xlat_get_block_size( void *ptr );
144 /**
145 * Retrieve the size of the code in the block starting at the specified
146 * pointer. Effectively this is xlat_get_block_size() minus the size of
147 * the recovery table. If the pointer is not a valid code block, the
148 * return value is undefined.
149 */
150 uint32_t FASTCALL xlat_get_code_size( void *ptr );
152 /**
153 * Flush the code cache for the page containing the given address
154 */
155 void FASTCALL xlat_flush_page( sh4addr_t address );
157 void FASTCALL xlat_invalidate_word( sh4addr_t address );
158 void FASTCALL xlat_invalidate_long( sh4addr_t address );
161 /**
162 * Invalidate the code cache for a memory region
163 */
164 void FASTCALL xlat_invalidate_block( sh4addr_t address, size_t bytes );
166 /**
167 * Flush the entire code cache. This isn't as cheap as one might like
168 */
169 void xlat_flush_cache();
171 /**
172 * Check the internal integrity of the cache
173 */
174 void xlat_check_integrity();
176 #endif /* lxdream_xltcache_H */
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