lxdream 0.9.1| filename | src/sh4/xltcache.h |
| changeset | 569:a1c49e1e8776 |
| prev | 561:533f6b478071 |
| next | 571:9bc09948d0f2 |
| author | nkeynes |
| date | Fri Jan 04 11:54:17 2008 +0000 (15 years ago) |
| branch | lxdream-mmu |
| permissions | -rw-r--r-- |
| last change | Bring icache partially into line with the mmu, a little less slow with AT off now. |
| view | annotate | diff | log | raw |
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 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 * Initialize the translation cache
31 */
32 void xlat_cache_init(void);
34 /**
35 * Returns the next block in the new cache list that can be written to by the
36 * translator.
37 */
38 xlat_cache_block_t xlat_start_block(sh4addr_t address);
40 /**
41 * Increases the current block size (only valid between calls to xlat_start_block()
42 * and xlat_commit_block()).
43 * @return the new block, which may be different from the old block.
44 */
45 xlat_cache_block_t xlat_extend_block( uint32_t newSize );
47 /**
48 * Commit the current translation block
49 * @param addr target address (for the lookup table)
50 * @param destsize final size of the translation in bytes.
51 * @param srcsize size of the original data that was translated in bytes
52 */
53 void xlat_commit_block( uint32_t destsize, uint32_t srcsize );
55 /**
56 * Dump the disassembly of the specified code block to a stream
57 * (primarily for debugging purposes)
58 * @param out The stream to write the output to
59 * @param code a translated block
60 */
61 void xlat_disasm_block( FILE *out, void *code );
64 /**
65 * Delete (deactivate) the specified block from the cache. Caller is responsible
66 * for ensuring that there really is a block there.
67 */
68 void xlat_delete_block( xlat_cache_block_t block );
70 /**
71 * Retrieve the entry point for the translated code corresponding to the given
72 * SH4 address, or NULL if there is no code for that address.
73 */
74 void *xlat_get_code( sh4addr_t address );
76 /**
77 * Retrieve the entry point for the translated code corresponding to the given
78 * SH4 virtual address, or NULL if there is no code for the address.
79 * If the virtual address cannot be resolved, this method will raise a TLB miss
80 * exception, and return NULL.
81 */
82 void *xlat_get_code_by_vma( sh4vma_t address );
84 /**
85 * Retrieve the address of the lookup table entry corresponding to the
86 * given SH4 address.
87 */
88 void **xlat_get_lut_entry( sh4addr_t address );
90 /**
91 * Retrieve the size of the code block starting at the specified pointer. If the
92 * pointer is not a valid code block, the return value is undefined.
93 */
94 uint32_t xlat_get_block_size( void *ptr );
96 /**
97 * Flush the code cache for the page containing the given address
98 */
99 void xlat_flush_page( sh4addr_t address );
101 void xlat_invalidate_word( sh4addr_t address );
102 void xlat_invalidate_long( sh4addr_t address );
105 /**
106 * Invalidate the code cache for a memory region
107 */
108 void xlat_invalidate_block( sh4addr_t address, size_t bytes );
110 /**
111 * Flush the entire code cache. This isn't as cheap as one might like
112 */
113 void xlat_flush_cache();
115 /**
116 * Check the internal integrity of the cache
117 */
118 void xlat_check_integrity();
.