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 (14 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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nkeynes@359 | 1 | /** |
nkeynes@366 | 2 | * $Id: xltcache.h,v 1.2 2007-09-04 08:32:44 nkeynes Exp $ |
nkeynes@359 | 3 | * |
nkeynes@359 | 4 | * Translation cache support (architecture independent) |
nkeynes@359 | 5 | * |
nkeynes@359 | 6 | * Copyright (c) 2005 Nathan Keynes. |
nkeynes@359 | 7 | * |
nkeynes@359 | 8 | * This program is free software; you can redistribute it and/or modify |
nkeynes@359 | 9 | * it under the terms of the GNU General Public License as published by |
nkeynes@359 | 10 | * the Free Software Foundation; either version 2 of the License, or |
nkeynes@359 | 11 | * (at your option) any later version. |
nkeynes@359 | 12 | * |
nkeynes@359 | 13 | * This program is distributed in the hope that it will be useful, |
nkeynes@359 | 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
nkeynes@359 | 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
nkeynes@359 | 16 | * GNU General Public License for more details. |
nkeynes@359 | 17 | */ |
nkeynes@359 | 18 | |
nkeynes@359 | 19 | #include "dream.h" |
nkeynes@359 | 20 | #include "mem.h" |
nkeynes@359 | 21 | |
nkeynes@359 | 22 | typedef struct xlat_cache_block { |
nkeynes@359 | 23 | int active; /* 0 = deleted, 1 = normal. 2 = accessed (temp-space only) */ |
nkeynes@359 | 24 | uint32_t size; |
nkeynes@359 | 25 | void **lut_entry; /* For deletion */ |
nkeynes@359 | 26 | unsigned char code[0]; |
nkeynes@359 | 27 | } *xlat_cache_block_t; |
nkeynes@359 | 28 | |
nkeynes@359 | 29 | /** |
nkeynes@359 | 30 | * Returns the next block in the new cache list that can be written to by the |
nkeynes@359 | 31 | * translator. |
nkeynes@359 | 32 | */ |
nkeynes@359 | 33 | xlat_cache_block_t xlat_start_block(sh4addr_t address); |
nkeynes@359 | 34 | |
nkeynes@359 | 35 | /** |
nkeynes@359 | 36 | * Increases the current block size (only valid between calls to xlat_start_block() |
nkeynes@359 | 37 | * and xlat_commit_block()). |
nkeynes@359 | 38 | * @return the new block, which may be different from the old block. |
nkeynes@359 | 39 | */ |
nkeynes@359 | 40 | xlat_cache_block_t xlat_extend_block(); |
nkeynes@359 | 41 | |
nkeynes@359 | 42 | /** |
nkeynes@359 | 43 | * Commit the current translation block |
nkeynes@359 | 44 | * @param addr target address (for the lookup table) |
nkeynes@359 | 45 | * @param destsize final size of the translation in bytes. |
nkeynes@359 | 46 | * @param srcsize size of the original data that was translated in bytes |
nkeynes@359 | 47 | */ |
nkeynes@359 | 48 | void xlat_commit_block( uint32_t destsize, uint32_t srcsize ); |
nkeynes@359 | 49 | |
nkeynes@359 | 50 | /** |
nkeynes@359 | 51 | * Delete (deactivate) the specified block from the cache. Caller is responsible |
nkeynes@359 | 52 | * for ensuring that there really is a block there. |
nkeynes@359 | 53 | */ |
nkeynes@359 | 54 | void xlat_delete_block( xlat_cache_block_t block ); |
nkeynes@359 | 55 | |
nkeynes@359 | 56 | /** |
nkeynes@359 | 57 | * Retrieve the entry point for the translated code corresponding to the given |
nkeynes@359 | 58 | * SH4 address, or NULL if there is no code for that address. |
nkeynes@359 | 59 | */ |
nkeynes@359 | 60 | void *xlat_get_code( sh4addr_t address ); |
nkeynes@359 | 61 | |
nkeynes@359 | 62 | /** |
nkeynes@366 | 63 | * Retrieve the size of the code block starting at the specified pointer. If the |
nkeynes@366 | 64 | * pointer is not a valid code block, the return value is undefined. |
nkeynes@366 | 65 | */ |
nkeynes@366 | 66 | uint32_t xlat_get_block_size( void *ptr ); |
nkeynes@366 | 67 | |
nkeynes@366 | 68 | /** |
nkeynes@359 | 69 | * Flush the code cache for the page containing the given address |
nkeynes@359 | 70 | */ |
nkeynes@359 | 71 | void xlat_flush_page( sh4addr_t address ); |
nkeynes@359 | 72 | |
nkeynes@359 | 73 | /** |
nkeynes@359 | 74 | * Flush the entire code cache. This isn't as cheap as one might like |
nkeynes@359 | 75 | */ |
nkeynes@359 | 76 | void xlat_flush_cache(); |
nkeynes@359 | 77 | |
nkeynes@359 | 78 | /** |
nkeynes@359 | 79 | * Check the internal integrity of the cache |
nkeynes@359 | 80 | */ |
nkeynes@359 | 81 | void xlat_check_integrity(); |
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