1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/sh4/xltcache.h	Thu Aug 23 12:33:27 2007 +0000
     1.3 @@ -0,0 +1,75 @@
     1.4 +/**
     1.5 + * $Id: xltcache.h,v 1.1 2007-08-23 12:33:27 nkeynes Exp $
     1.6 + * 
     1.7 + * Translation cache support (architecture independent)
     1.8 + *
     1.9 + * Copyright (c) 2005 Nathan Keynes.
    1.10 + *
    1.11 + * This program is free software; you can redistribute it and/or modify
    1.12 + * it under the terms of the GNU General Public License as published by
    1.13 + * the Free Software Foundation; either version 2 of the License, or
    1.14 + * (at your option) any later version.
    1.15 + *
    1.16 + * This program is distributed in the hope that it will be useful,
    1.17 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
    1.18 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    1.19 + * GNU General Public License for more details.
    1.20 + */
    1.21 +
    1.22 +#include "dream.h"
    1.23 +#include "mem.h"
    1.24 +
    1.25 +typedef struct xlat_cache_block {
    1.26 +    int active;  /* 0 = deleted, 1 = normal. 2 = accessed (temp-space only) */
    1.27 +    uint32_t size;
    1.28 +    void **lut_entry; /* For deletion */
    1.29 +    unsigned char code[0];
    1.30 +} *xlat_cache_block_t;
    1.31 +
    1.32 +/**
    1.33 + * Returns the next block in the new cache list that can be written to by the
    1.34 + * translator.
    1.35 + */
    1.36 +xlat_cache_block_t xlat_start_block(sh4addr_t address);
    1.37 +
    1.38 +/**
    1.39 + * Increases the current block size (only valid between calls to xlat_start_block()
    1.40 + * and xlat_commit_block()). 
    1.41 + * @return the new block, which may be different from the old block.
    1.42 + */
    1.43 +xlat_cache_block_t xlat_extend_block();
    1.44 +
    1.45 +/**
    1.46 + * Commit the current translation block
    1.47 + * @param addr target address (for the lookup table)
    1.48 + * @param destsize final size of the translation in bytes.
    1.49 + * @param srcsize size of the original data that was translated in bytes
    1.50 + */
    1.51 +void xlat_commit_block( uint32_t destsize, uint32_t srcsize );
    1.52 +
    1.53 +/**
    1.54 + * Delete (deactivate) the specified block from the cache. Caller is responsible
    1.55 + * for ensuring that there really is a block there.
    1.56 + */
    1.57 +void xlat_delete_block( xlat_cache_block_t block );
    1.58 +
    1.59 +/**
    1.60 + * Retrieve the entry point for the translated code corresponding to the given
    1.61 + * SH4 address, or NULL if there is no code for that address.
    1.62 + */
    1.63 +void *xlat_get_code( sh4addr_t address );
    1.64 +
    1.65 +/**
    1.66 + * Flush the code cache for the page containing the given address
    1.67 + */
    1.68 +void xlat_flush_page( sh4addr_t address );
    1.69 +
    1.70 +/**
    1.71 + * Flush the entire code cache. This isn't as cheap as one might like
    1.72 + */
    1.73 +void xlat_flush_cache();
    1.74 +
    1.75 +/**
    1.76 + * Check the internal integrity of the cache
    1.77 + */
    1.78 +void xlat_check_integrity();