lxdream 0.9.1| filename | src/sh4/xltcache.h |
| changeset | 407:d24ab36150c4 |
| prev | 400:049d72a7a229 |
| next | 410:5f8413358e7f |
| author | nkeynes |
| date | Fri Sep 28 07:26:35 2007 +0000 (16 years ago) |
| permissions | -rw-r--r-- |
| last change | Add xlat_get_lut_entry method Force blocks to be 32-bit aligned (slight optimization) |
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1 /**
2 * $Id: xltcache.h,v 1.5 2007-09-28 07:26:35 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 address of the lookup table entry corresponding to the
73 * given SH4 address.
74 */
75 void **xlat_get_lut_entry( sh4addr_t address );
77 /**
78 * Retrieve the size of the code block starting at the specified pointer. If the
79 * pointer is not a valid code block, the return value is undefined.
80 */
81 uint32_t xlat_get_block_size( void *ptr );
83 /**
84 * Flush the code cache for the page containing the given address
85 */
86 void xlat_flush_page( sh4addr_t address );
88 void xlat_invalidate_word( sh4addr_t address );
89 void xlat_invalidate_long( sh4addr_t address );
92 /**
93 * Invalidate the code cache for a memory region
94 */
95 void xlat_invalidate_block( sh4addr_t address, size_t bytes );
97 /**
98 * Flush the entire code cache. This isn't as cheap as one might like
99 */
100 void xlat_flush_cache();
102 /**
103 * Check the internal integrity of the cache
104 */
105 void xlat_check_integrity();
.