4 * SH4 shadow execution core - runs xlat + emu together and checks that the
5 * results are the same.
7 * Copyright (c) 2010 Nathan Keynes.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
27 #include "sh4/sh4trans.h"
41 char *memOpNames[] = { "read_long", "write_long", "read_word", "write_word",
42 "read_byte", "write_byte", "prefetch", "read_byte_for_write" };
44 struct mem_log_entry {
50 static struct sh4_registers shadow_sh4r;
51 static struct mem_region_fn **log_address_space;
52 static struct mem_region_fn **check_address_space;
53 static struct mem_region_fn **real_address_space;
55 #define MEM_LOG_SIZE 4096
56 static struct mem_log_entry *mem_log;
57 static uint32_t mem_log_posn, mem_log_size;
58 static uint32_t mem_check_posn;
60 #define IS_STORE_QUEUE(X) (((X)&0xFC000000) == 0xE0000000)
62 static void log_mem_op( MemOp op, sh4addr_t addr, uint32_t value )
64 if( mem_log_posn == mem_log_size ) {
65 struct mem_log_entry *tmp = realloc(mem_log, mem_log_size * sizeof(struct mem_log_entry) * 2);
66 assert( tmp != NULL );
70 mem_log[mem_log_posn].op = op;
71 mem_log[mem_log_posn].addr = addr;
72 mem_log[mem_log_posn].value = value;
76 static void print_mem_op( FILE *f, MemOp op, sh4addr_t addr, uint32_t value )
78 if( op == WRITE_LONG || op == WRITE_WORD || op == WRITE_BYTE ) {
79 fprintf( f, "%s( %08X, %08X )\n", memOpNames[op], addr, value );
81 fprintf( f, "%s( %08X )\n", memOpNames[op], addr );
85 static void dump_mem_ops()
87 for( unsigned i=0; i<mem_log_posn; i++ ) {
88 print_mem_op( stderr, mem_log[i].op, mem_log[i].addr, mem_log[i].value );
92 static int32_t check_mem_op( MemOp op, sh4addr_t addr, uint32_t value )
94 if( mem_check_posn >= mem_log_posn ) {
95 fprintf( stderr, "Unexpected interpreter memory operation: " );
96 print_mem_op(stderr, op, addr, value );
99 if( mem_log[mem_check_posn].op != op ||
100 mem_log[mem_check_posn].addr != addr ||
101 (( op == WRITE_LONG || op == WRITE_WORD || op == WRITE_BYTE ) &&
102 mem_log[mem_check_posn].value != value ) ) {
103 fprintf(stderr, "Memory operation mismatch. Translator: " );
104 print_mem_op(stderr, mem_log[mem_check_posn].op,
105 mem_log[mem_check_posn].addr, mem_log[mem_check_posn].value );
106 fprintf(stderr, "Emulator: ");
107 print_mem_op(stderr, op, addr, value );
110 return mem_log[mem_check_posn++].value;
113 #define CHECK_REG(sym, name) if( xsh4r->sym != esh4r->sym ) { \
114 isgood = FALSE; fprintf( stderr, name " Xlt = %08X, Emu = %08X\n", xsh4r->sym, esh4r->sym ); }
116 static gboolean check_registers( struct sh4_registers *xsh4r, struct sh4_registers *esh4r )
118 gboolean isgood = TRUE;
119 for( unsigned i=0; i<16; i++ ) {
120 if( xsh4r->r[i] != esh4r->r[i] ) {
122 fprintf( stderr, "R%d Xlt = %08X, Emu = %08X\n", i, xsh4r->r[i], esh4r->r[i] );
125 for( unsigned i=0; i<8; i++ ) {
126 if( xsh4r->r_bank[i] != esh4r->r_bank[i] ) {
128 fprintf( stderr, "R_BANK%d Xlt = %08X, Emu = %08X\n", i, xsh4r->r_bank[i], esh4r->r_bank[i] );
131 for( unsigned i=0; i<16; i++ ) {
132 if( xsh4r->fr[0][i] != esh4r->fr[0][i] ) {
134 fprintf( stderr, "FR%d Xlt = %f, Emu = %f\n", i, xsh4r->fr[0][i], esh4r->fr[0][i] );
137 for( unsigned i=0; i<16; i++ ) {
138 if( xsh4r->fr[1][i] != esh4r->fr[1][i] ) {
140 fprintf( stderr, "XF%d Xlt = %f, Emu = %f\n", i, xsh4r->fr[1][i], esh4r->fr[1][i] );
151 CHECK_REG(fpscr, "FPSCR");
152 CHECK_REG(fpul.i, "FPUL");
153 if( xsh4r->mac != esh4r->mac ) {
155 fprintf( stderr, "MAC Xlt = %016llX, Emu = %016llX\n", xsh4r->mac, esh4r->mac );
157 CHECK_REG(gbr, "GBR");
158 CHECK_REG(ssr, "SSR");
159 CHECK_REG(spc, "SPC");
160 CHECK_REG(sgr, "SGR");
161 CHECK_REG(dbr, "DBR");
162 CHECK_REG(vbr, "VBR");
163 CHECK_REG(sh4_state, "STATE");
164 if( memcmp( xsh4r->store_queue, esh4r->store_queue, sizeof(xsh4r->store_queue) ) != 0 ) {
166 fprintf( stderr, "Store queue Xlt =\n" );
167 fwrite_dump( xsh4r->store_queue, sizeof(xsh4r->store_queue), stderr );
168 fprintf( stderr, " Emu =\n" );
169 fwrite_dump( esh4r->store_queue, sizeof(esh4r->store_queue), stderr );
174 static FASTCALL int32_t log_read_long( sh4addr_t addr )
176 int32_t rv = real_address_space[addr>>12]->read_long(addr);
177 log_mem_op( READ_LONG, addr, rv );
181 static FASTCALL int32_t log_read_word( sh4addr_t addr )
183 int32_t rv = real_address_space[addr>>12]->read_word(addr);
184 log_mem_op( READ_WORD, addr, rv );
188 static FASTCALL int32_t log_read_byte( sh4addr_t addr )
190 int32_t rv = real_address_space[addr>>12]->read_byte(addr);
191 log_mem_op( READ_BYTE, addr, rv );
195 static FASTCALL int32_t log_read_byte_for_write( sh4addr_t addr )
197 int32_t rv = real_address_space[addr>>12]->read_byte_for_write(addr);
198 log_mem_op( READ_BYTE_FOR_WRITE, addr, rv );
202 static FASTCALL void log_write_long( sh4addr_t addr, uint32_t val )
204 if( !IS_STORE_QUEUE(addr) )
205 log_mem_op( WRITE_LONG, addr, val );
206 real_address_space[addr>>12]->write_long(addr, val);
209 static FASTCALL void log_write_word( sh4addr_t addr, uint32_t val )
211 if( !IS_STORE_QUEUE(addr) )
212 log_mem_op( WRITE_WORD, addr, val );
213 real_address_space[addr>>12]->write_word(addr, val);
216 static FASTCALL void log_write_byte( sh4addr_t addr, uint32_t val )
218 if( !IS_STORE_QUEUE(addr) )
219 log_mem_op( WRITE_BYTE, addr, val );
220 real_address_space[addr>>12]->write_byte(addr, val);
223 static FASTCALL void log_prefetch( sh4addr_t addr )
225 log_mem_op( PREFETCH, addr, 0 );
226 real_address_space[addr>>12]->prefetch(addr);
229 static FASTCALL int32_t check_read_long( sh4addr_t addr )
231 return check_mem_op( READ_LONG, addr, 0 );
234 static FASTCALL int32_t check_read_word( sh4addr_t addr )
236 return check_mem_op( READ_WORD, addr, 0 );
239 static FASTCALL int32_t check_read_byte( sh4addr_t addr )
241 return check_mem_op( READ_BYTE, addr, 0 );
244 static FASTCALL int32_t check_read_byte_for_write( sh4addr_t addr )
246 return check_mem_op( READ_BYTE_FOR_WRITE, addr, 0 );
249 static FASTCALL void check_write_long( sh4addr_t addr, uint32_t value )
251 if( !IS_STORE_QUEUE(addr) )
252 check_mem_op( WRITE_LONG, addr, value );
255 static FASTCALL void check_write_word( sh4addr_t addr, uint32_t value )
257 if( !IS_STORE_QUEUE(addr) )
258 check_mem_op( WRITE_WORD, addr, value );
261 static FASTCALL void check_write_byte( sh4addr_t addr, uint32_t value )
263 if( !IS_STORE_QUEUE(addr) )
264 check_mem_op( WRITE_BYTE, addr, value );
267 static FASTCALL void check_prefetch( sh4addr_t addr )
269 check_mem_op( PREFETCH, addr, 0 );
272 struct mem_region_fn log_fns = { log_read_long, log_write_long,
273 log_read_word, log_write_word,
274 log_read_byte, log_write_byte,
275 NULL, NULL, log_prefetch, log_read_byte_for_write };
277 struct mem_region_fn check_fns = { check_read_long, check_write_long,
278 check_read_word, check_write_word,
279 check_read_byte, check_write_byte,
280 NULL, NULL, check_prefetch, check_read_byte_for_write };
285 void sh4_shadow_block_begin()
287 memcpy( &shadow_sh4r, &sh4r, sizeof(struct sh4_registers) );
291 void sh4_shadow_block_end()
293 struct sh4_registers temp_sh4r;
295 /* Save the end registers, and restore the state back to the start */
296 memcpy( &temp_sh4r, &sh4r, sizeof(struct sh4_registers) );
297 memcpy( &sh4r, &shadow_sh4r, sizeof(struct sh4_registers) );
299 sh4_address_space = check_address_space;
301 sh4r.new_pc = sh4r.pc + 2;
302 while( sh4r.slice_cycle < temp_sh4r.slice_cycle ) {
303 sh4_execute_instruction();
304 sh4r.slice_cycle += sh4_cpu_period;
307 if( !check_registers( &temp_sh4r, &sh4r ) ) {
308 fprintf( stderr, "After executing block at %08X\n", shadow_sh4r.pc );
311 if( mem_check_posn < mem_log_posn ) {
312 fprintf( stderr, "Additional translator memory operations:\n" );
313 while( mem_check_posn < mem_log_posn ) {
314 print_mem_op( stderr, mem_log[mem_check_posn].op, mem_log[mem_check_posn].addr, mem_log[mem_check_posn].value );
319 sh4_address_space = real_address_space;
323 void sh4_shadow_init()
325 real_address_space = sh4_address_space;
326 log_address_space = mem_alloc_pages( sizeof(mem_region_fn_t) * 256 );
327 check_address_space = mem_alloc_pages( sizeof(mem_region_fn_t) * 256 );
328 for( unsigned i=0; i < (256 * 4096); i++ ) {
329 log_address_space[i] = &log_fns;
330 check_address_space[i] = &check_fns;
333 mem_log_size = MEM_LOG_SIZE;
334 mem_log = malloc( mem_log_size * sizeof(struct mem_log_entry) );
335 assert( mem_log != NULL );
337 sh4_translate_set_callbacks( sh4_shadow_block_begin, sh4_shadow_block_end );
338 sh4_translate_set_fastmem( FALSE );
339 sh4_translate_set_address_space( log_address_space, log_address_space );
.