lxdream 0.9.1| filename | src/sh4/xltcache.h |
| changeset | 376:8c7587af5a5d |
| prev | 366:6fb0d05152d7 |
| next | 400:049d72a7a229 |
| author | nkeynes |
| date | Wed Sep 12 09:20:38 2007 +0000 (16 years ago) |
| permissions | -rw-r--r-- |
| last change | Start splitting the common SH4 parts into sh4.c, with sh4core.c to become just the emulation core. |
| view | annotate | diff | log | raw |
1 /**
2 * $Id: xltcache.h,v 1.3 2007-09-12 09:16:47 nkeynes Exp $
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 typedef struct xlat_cache_block {
23 int active; /* 0 = deleted, 1 = normal. 2 = accessed (temp-space only) */
24 uint32_t size;
25 void **lut_entry; /* For deletion */
26 unsigned char code[0];
27 } *xlat_cache_block_t;
29 /**
30 * Returns the next block in the new cache list that can be written to by the
31 * translator.
32 */
33 xlat_cache_block_t xlat_start_block(sh4addr_t address);
35 /**
36 * Increases the current block size (only valid between calls to xlat_start_block()
37 * and xlat_commit_block()).
38 * @return the new block, which may be different from the old block.
39 */
40 xlat_cache_block_t xlat_extend_block();
42 /**
43 * Commit the current translation block
44 * @param addr target address (for the lookup table)
45 * @param destsize final size of the translation in bytes.
46 * @param srcsize size of the original data that was translated in bytes
47 */
48 void xlat_commit_block( uint32_t destsize, uint32_t srcsize );
50 /**
51 * Dump the disassembly of the specified code block to a stream
52 * (primarily for debugging purposes)
53 * @param out The stream to write the output to
54 * @param code a translated block
55 */
56 void xlat_disasm_block( FILE *out, void *code );
59 /**
60 * Delete (deactivate) the specified block from the cache. Caller is responsible
61 * for ensuring that there really is a block there.
62 */
63 void xlat_delete_block( xlat_cache_block_t block );
65 /**
66 * Retrieve the entry point for the translated code corresponding to the given
67 * SH4 address, or NULL if there is no code for that address.
68 */
69 void *xlat_get_code( sh4addr_t address );
71 /**
72 * Retrieve the size of the code block starting at the specified pointer. If the
73 * pointer is not a valid code block, the return value is undefined.
74 */
75 uint32_t xlat_get_block_size( void *ptr );
77 /**
78 * Flush the code cache for the page containing the given address
79 */
80 void xlat_flush_page( sh4addr_t address );
82 /**
83 * Flush the entire code cache. This isn't as cheap as one might like
84 */
85 void xlat_flush_cache();
87 /**
88 * Check the internal integrity of the cache
89 */
90 void xlat_check_integrity();
.