nkeynes@991 | 1 | /**
|
nkeynes@991 | 2 | * $Id$
|
nkeynes@991 | 3 | *
|
nkeynes@991 | 4 | * Translation cache support (architecture independent)
|
nkeynes@991 | 5 | *
|
nkeynes@991 | 6 | * Copyright (c) 2005 Nathan Keynes.
|
nkeynes@991 | 7 | *
|
nkeynes@991 | 8 | * This program is free software; you can redistribute it and/or modify
|
nkeynes@991 | 9 | * it under the terms of the GNU General Public License as published by
|
nkeynes@991 | 10 | * the Free Software Foundation; either version 2 of the License, or
|
nkeynes@991 | 11 | * (at your option) any later version.
|
nkeynes@991 | 12 | *
|
nkeynes@991 | 13 | * This program is distributed in the hope that it will be useful,
|
nkeynes@991 | 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
nkeynes@991 | 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
nkeynes@991 | 16 | * GNU General Public License for more details.
|
nkeynes@991 | 17 | */
|
nkeynes@991 | 18 |
|
nkeynes@991 | 19 | #include "dream.h"
|
nkeynes@991 | 20 | #include "mem.h"
|
nkeynes@991 | 21 |
|
nkeynes@991 | 22 | #ifndef lxdream_xltcache_H
|
nkeynes@991 | 23 | #define lxdream_xltcache_H 1
|
nkeynes@991 | 24 |
|
nkeynes@991 | 25 | /**
|
nkeynes@991 | 26 | * For now, recovery is purely a matter of mapping native pc => sh4 pc,
|
nkeynes@991 | 27 | * and updating sh4r.pc & sh4r.slice_cycles accordingly. In future more
|
nkeynes@991 | 28 | * detailed recovery may be required if the translator optimizes more
|
nkeynes@991 | 29 | * agressively.
|
nkeynes@991 | 30 | *
|
nkeynes@991 | 31 | * The recovery table contains (at least) one entry per abortable instruction,
|
nkeynes@991 | 32 | *
|
nkeynes@991 | 33 | */
|
nkeynes@991 | 34 | typedef struct xlat_recovery_record {
|
nkeynes@991 | 35 | uint32_t xlat_offset; // native (translated) pc
|
nkeynes@991 | 36 | uint32_t sh4_icount; // instruction number of the corresponding SH4 instruction
|
nkeynes@991 | 37 | // (0 = first instruction, 1 = second instruction, ... )
|
nkeynes@991 | 38 | } *xlat_recovery_record_t;
|
nkeynes@991 | 39 |
|
nkeynes@991 | 40 | struct xlat_cache_block {
|
nkeynes@991 | 41 | int active; /* 0 = deleted, 1 = normal. 2 = accessed (temp-space only) */
|
nkeynes@991 | 42 | uint32_t size;
|
nkeynes@991 | 43 | void **lut_entry; /* For deletion */
|
nkeynes@991 | 44 | uint32_t xlat_sh4_mode; /* comparison with sh4r.xlat_sh4_mode */
|
nkeynes@991 | 45 | uint32_t recover_table_offset; // Offset from code[0] of the recovery table;
|
nkeynes@991 | 46 | uint32_t recover_table_size;
|
nkeynes@991 | 47 | unsigned char code[0];
|
nkeynes@991 | 48 | } __attribute__((packed));
|
nkeynes@991 | 49 |
|
nkeynes@991 | 50 | typedef struct xlat_cache_block *xlat_cache_block_t;
|
nkeynes@991 | 51 |
|
nkeynes@991 | 52 | #define XLAT_BLOCK_FOR_CODE(code) (((xlat_cache_block_t)code)-1)
|
nkeynes@991 | 53 |
|
nkeynes@991 | 54 | #define XLAT_BLOCK_MODE(code) (XLAT_BLOCK_FOR_CODE(code)->xlat_sh4_mode)
|
nkeynes@991 | 55 |
|
nkeynes@991 | 56 | /**
|
nkeynes@991 | 57 | * Initialize the translation cache
|
nkeynes@991 | 58 | */
|
nkeynes@991 | 59 | void xlat_cache_init(void);
|
nkeynes@991 | 60 |
|
nkeynes@991 | 61 | /**
|
nkeynes@991 | 62 | * Returns the next block in the new cache list that can be written to by the
|
nkeynes@991 | 63 | * translator.
|
nkeynes@991 | 64 | */
|
nkeynes@991 | 65 | xlat_cache_block_t xlat_start_block(sh4addr_t address);
|
nkeynes@991 | 66 |
|
nkeynes@991 | 67 | /**
|
nkeynes@991 | 68 | * Increases the current block size (only valid between calls to xlat_start_block()
|
nkeynes@991 | 69 | * and xlat_commit_block()).
|
nkeynes@991 | 70 | * @return the new block, which may be different from the old block.
|
nkeynes@991 | 71 | */
|
nkeynes@991 | 72 | xlat_cache_block_t xlat_extend_block( uint32_t newSize );
|
nkeynes@991 | 73 |
|
nkeynes@991 | 74 | /**
|
nkeynes@991 | 75 | * Commit the current translation block
|
nkeynes@991 | 76 | * @param addr target address (for the lookup table)
|
nkeynes@991 | 77 | * @param destsize final size of the translation in bytes.
|
nkeynes@991 | 78 | * @param srcsize size of the original data that was translated in bytes
|
nkeynes@991 | 79 | */
|
nkeynes@991 | 80 | void xlat_commit_block( uint32_t destsize, uint32_t srcsize );
|
nkeynes@991 | 81 |
|
nkeynes@991 | 82 | /**
|
nkeynes@991 | 83 | * Dump the disassembly of the specified code block to a stream
|
nkeynes@991 | 84 | * (primarily for debugging purposes)
|
nkeynes@991 | 85 | * @param out The stream to write the output to
|
nkeynes@991 | 86 | * @param code a translated block
|
nkeynes@991 | 87 | */
|
nkeynes@991 | 88 | void xlat_disasm_block( FILE *out, void *code );
|
nkeynes@991 | 89 |
|
nkeynes@991 | 90 |
|
nkeynes@991 | 91 | /**
|
nkeynes@991 | 92 | * Delete (deactivate) the specified block from the cache. Caller is responsible
|
nkeynes@991 | 93 | * for ensuring that there really is a block there.
|
nkeynes@991 | 94 | */
|
nkeynes@991 | 95 | void xlat_delete_block( xlat_cache_block_t block );
|
nkeynes@991 | 96 |
|
nkeynes@991 | 97 | /**
|
nkeynes@991 | 98 | * Retrieve the entry point for the translated code corresponding to the given
|
nkeynes@991 | 99 | * SH4 address, or NULL if there is no code for that address.
|
nkeynes@991 | 100 | */
|
nkeynes@991 | 101 | void * FASTCALL xlat_get_code( sh4addr_t address );
|
nkeynes@991 | 102 |
|
nkeynes@991 | 103 | /**
|
nkeynes@991 | 104 | * Retrieve the pre-instruction recovery record corresponding to the given
|
nkeynes@991 | 105 | * native address, or NULL if there is no recovery code for the address.
|
nkeynes@991 | 106 | * @param code The code block containing the recovery table.
|
nkeynes@991 | 107 | * @param native_pc A pointer that must be within the currently executing
|
nkeynes@991 | 108 | * return the first record before or equal to the given pc.
|
nkeynes@991 | 109 | * translation block.
|
nkeynes@991 | 110 | */
|
nkeynes@991 | 111 | struct xlat_recovery_record *xlat_get_pre_recovery( void *code, void *native_pc );
|
nkeynes@991 | 112 |
|
nkeynes@991 | 113 |
|
nkeynes@991 | 114 | /**
|
nkeynes@991 | 115 | * Retrieve the entry point for the translated code corresponding to the given
|
nkeynes@991 | 116 | * SH4 virtual address, or NULL if there is no code for the address.
|
nkeynes@991 | 117 | * If the virtual address cannot be resolved, this method will raise a TLB miss
|
nkeynes@991 | 118 | * exception, and return NULL.
|
nkeynes@991 | 119 | */
|
nkeynes@991 | 120 | void * FASTCALL xlat_get_code_by_vma( sh4vma_t address );
|
nkeynes@991 | 121 |
|
nkeynes@991 | 122 | /**
|
nkeynes@991 | 123 | * Retrieve the address of the lookup table entry corresponding to the
|
nkeynes@991 | 124 | * given SH4 address.
|
nkeynes@991 | 125 | */
|
nkeynes@991 | 126 | void ** FASTCALL xlat_get_lut_entry( sh4addr_t address );
|
nkeynes@991 | 127 |
|
nkeynes@991 | 128 | /**
|
nkeynes@991 | 129 | * Retrieve the current host address of the running translated code block.
|
nkeynes@991 | 130 | * @return the host PC, or null if there is no currently executing translated
|
nkeynes@991 | 131 | * block (or the stack is corrupted)
|
nkeynes@991 | 132 | * Note: the implementation of this method is host (and calling-convention) specific.
|
nkeynes@991 | 133 | * @param block_start start of the block the PC should be in
|
nkeynes@991 | 134 | * @param block_size size of the code block in bytes.
|
nkeynes@991 | 135 | */
|
nkeynes@991 | 136 | void *xlat_get_native_pc( void *block_start, uint32_t block_size );
|
nkeynes@991 | 137 |
|
nkeynes@991 | 138 | /**
|
nkeynes@991 | 139 | * Retrieve the size of the block starting at the specified pointer. If the
|
nkeynes@991 | 140 | * pointer is not a valid code block, the return value is undefined.
|
nkeynes@991 | 141 | */
|
nkeynes@991 | 142 | uint32_t FASTCALL xlat_get_block_size( void *ptr );
|
nkeynes@991 | 143 |
|
nkeynes@991 | 144 | /**
|
nkeynes@991 | 145 | * Retrieve the size of the code in the block starting at the specified
|
nkeynes@991 | 146 | * pointer. Effectively this is xlat_get_block_size() minus the size of
|
nkeynes@991 | 147 | * the recovery table. If the pointer is not a valid code block, the
|
nkeynes@991 | 148 | * return value is undefined.
|
nkeynes@991 | 149 | */
|
nkeynes@991 | 150 | uint32_t FASTCALL xlat_get_code_size( void *ptr );
|
nkeynes@991 | 151 |
|
nkeynes@991 | 152 | /**
|
nkeynes@991 | 153 | * Flush the code cache for the page containing the given address
|
nkeynes@991 | 154 | */
|
nkeynes@991 | 155 | void FASTCALL xlat_flush_page( sh4addr_t address );
|
nkeynes@991 | 156 |
|
nkeynes@991 | 157 | void FASTCALL xlat_invalidate_word( sh4addr_t address );
|
nkeynes@991 | 158 | void FASTCALL xlat_invalidate_long( sh4addr_t address );
|
nkeynes@991 | 159 |
|
nkeynes@991 | 160 |
|
nkeynes@991 | 161 | /**
|
nkeynes@991 | 162 | * Invalidate the code cache for a memory region
|
nkeynes@991 | 163 | */
|
nkeynes@991 | 164 | void FASTCALL xlat_invalidate_block( sh4addr_t address, size_t bytes );
|
nkeynes@991 | 165 |
|
nkeynes@991 | 166 | /**
|
nkeynes@991 | 167 | * Flush the entire code cache. This isn't as cheap as one might like
|
nkeynes@991 | 168 | */
|
nkeynes@991 | 169 | void xlat_flush_cache();
|
nkeynes@991 | 170 |
|
nkeynes@991 | 171 | /**
|
nkeynes@991 | 172 | * Check the internal integrity of the cache
|
nkeynes@991 | 173 | */
|
nkeynes@991 | 174 | void xlat_check_integrity();
|
nkeynes@991 | 175 |
|
nkeynes@991 | 176 | #endif /* lxdream_xltcache_H */
|