lxdream 0.9.1| filename | src/sh4/xltcache.h |
| changeset | 366:6fb0d05152d7 |
| prev | 359:c588dce7ebde |
| next | 376:8c7587af5a5d |
| author | nkeynes |
| date | Tue Sep 04 08:32:44 2007 +0000 (16 years ago) |
| permissions | -rw-r--r-- |
| last change | Add method to retrieve the size of a block, given the code pointer (useful for eg disassembling the block) |
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1 /**
2 * $Id: xltcache.h,v 1.2 2007-09-04 08:32:44 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 * Delete (deactivate) the specified block from the cache. Caller is responsible
52 * for ensuring that there really is a block there.
53 */
54 void xlat_delete_block( xlat_cache_block_t block );
56 /**
57 * Retrieve the entry point for the translated code corresponding to the given
58 * SH4 address, or NULL if there is no code for that address.
59 */
60 void *xlat_get_code( sh4addr_t address );
62 /**
63 * Retrieve the size of the code block starting at the specified pointer. If the
64 * pointer is not a valid code block, the return value is undefined.
65 */
66 uint32_t xlat_get_block_size( void *ptr );
68 /**
69 * Flush the code cache for the page containing the given address
70 */
71 void xlat_flush_page( sh4addr_t address );
73 /**
74 * Flush the entire code cache. This isn't as cheap as one might like
75 */
76 void xlat_flush_cache();
78 /**
79 * Check the internal integrity of the cache
80 */
81 void xlat_check_integrity();
.