lxdream 0.9.1| filename | src/sh4/sh4mem.c |
| changeset | 912:c5606ea44232 |
| prev | 911:2f6ba75b84d1 |
| next | 927:17b6b9e245d8 |
| author | nkeynes |
| date | Thu Dec 11 23:26:03 2008 +0000 (15 years ago) |
| permissions | -rw-r--r-- |
| last change | Disable the generational translation cache - I've got no evidence that it actually helps performance, and it simplifies things to get rid of it (in particular, translated code doesn't have to worry about being moved now). |
| view | annotate | diff | log | raw |
1 /**
2 * $Id$
3 * sh4mem.c is responsible for the SH4's access to memory (including memory
4 * mapped I/O), using the page maps created in mem.c
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 #define MODULE sh4_module
21 #include <string.h>
22 #include <zlib.h>
23 #include "dream.h"
24 #include "mem.h"
25 #include "mmio.h"
26 #include "dreamcast.h"
27 #include "sh4/sh4core.h"
28 #include "sh4/sh4mmio.h"
29 #include "sh4/xltcache.h"
30 #include "pvr2/pvr2.h"
31 #include "asic.h"
33 #define OC_BASE 0x1C000000
34 #define OC_TOP 0x20000000
36 #define TRANSLATE_VIDEO_64BIT_ADDRESS(a) ( (((a)&0x00FFFFF8)>>1)|(((a)&0x00000004)<<20)|((a)&0x03)|0x05000000 )
38 #ifdef ENABLE_WATCH
39 #define CHECK_READ_WATCH( addr, size ) \
40 if( mem_is_watched(addr,size,WATCH_READ) != NULL ) { \
41 WARN( "Watch triggered at %08X by %d byte read", addr, size ); \
42 sh4_core_exit(CORE_EXIT_HALT); \
43 }
44 #define CHECK_WRITE_WATCH( addr, size, val ) \
45 if( mem_is_watched(addr,size,WATCH_WRITE) != NULL ) { \
46 WARN( "Watch triggered at %08X by %d byte write <= %0*X", addr, size, size*2, val ); \
47 sh4_core_exit(CORE_EXIT_HALT); \
48 }
49 #else
50 #define CHECK_READ_WATCH( addr, size )
51 #define CHECK_WRITE_WATCH( addr, size, val )
52 #endif
54 #ifdef ENABLE_TRACE_IO
55 #define TRACE_IO( str, p, r, ... ) if(io_rgn[(uint32_t)p]->trace_flag && !MMIO_NOTRACE_BYNUM((uint32_t)p,r)) \
56 TRACE( str " [%s.%s: %s]", __VA_ARGS__, \
57 MMIO_NAME_BYNUM((uint32_t)p), MMIO_REGID_BYNUM((uint32_t)p, r), \
58 MMIO_REGDESC_BYNUM((uint32_t)p, r) )
59 #define TRACE_P4IO( str, io, r, ... ) if(io->trace_flag && !MMIO_NOTRACE_IOBYNUM(io,r)) \
60 TRACE( str " [%s.%s: %s]", __VA_ARGS__, \
61 io->id, MMIO_REGID_IOBYNUM(io, r), \
62 MMIO_REGDESC_IOBYNUM(io, r) )
63 #else
64 #define TRACE_IO( str, p, r, ... )
65 #define TRACE_P4IO( str, io, r, ... )
66 #endif
68 extern struct mem_region mem_rgn[];
69 extern struct mmio_region *P4_io[];
71 int32_t FASTCALL sh4_read_p4( sh4addr_t addr )
72 {
73 struct mmio_region *io = P4_io[(addr&0x1FFFFFFF)>>19];
74 if( !io ) {
75 switch( addr & 0x1F000000 ) {
76 case 0x00000000: case 0x01000000: case 0x02000000: case 0x03000000:
77 /* Store queue - readable? */
78 return 0;
79 break;
80 case 0x10000000: return mmu_icache_addr_read( addr );
81 case 0x11000000: return mmu_icache_data_read( addr );
82 case 0x12000000: return mmu_itlb_addr_read( addr );
83 case 0x13000000: return mmu_itlb_data_read( addr );
84 case 0x14000000: return mmu_ocache_addr_read( addr );
85 case 0x15000000: return mmu_ocache_data_read( addr );
86 case 0x16000000: return mmu_utlb_addr_read( addr );
87 case 0x17000000: return mmu_utlb_data_read( addr );
88 default:
89 WARN( "Attempted read from unknown or invalid P4 region: %08X", addr );
90 return 0;
91 }
92 } else {
93 int32_t val = io->io_read( addr&0xFFF );
94 TRACE_P4IO( "Long read %08X <= %08X", io, (addr&0xFFF), val, addr );
95 return val;
96 }
97 }
99 void FASTCALL sh4_write_p4( sh4addr_t addr, int32_t val )
100 {
101 struct mmio_region *io = P4_io[(addr&0x1FFFFFFF)>>19];
102 if( !io ) {
103 switch( addr & 0x1F000000 ) {
104 case 0x00000000: case 0x01000000: case 0x02000000: case 0x03000000:
105 /* Store queue */
106 SH4_WRITE_STORE_QUEUE( addr, val );
107 break;
108 case 0x10000000: mmu_icache_addr_write( addr, val ); break;
109 case 0x11000000: mmu_icache_data_write( addr, val ); break;
110 case 0x12000000: mmu_itlb_addr_write( addr, val ); break;
111 case 0x13000000: mmu_itlb_data_write( addr, val ); break;
112 case 0x14000000: mmu_ocache_addr_write( addr, val ); break;
113 case 0x15000000: mmu_ocache_data_write( addr, val ); break;
114 case 0x16000000: mmu_utlb_addr_write( addr, val ); break;
115 case 0x17000000: mmu_utlb_data_write( addr, val ); break;
116 default:
117 if( (addr & 0xFFFF0000 ) == 0xFF940000 ||
118 (addr & 0xFFFF0000 ) == 0xFF900000 ) {
119 // SDRAM configuration, ignore for now
120 } else {
121 WARN( "Attempted write to unknown P4 region: %08X", addr );
122 }
123 }
124 } else {
125 TRACE_P4IO( "Long write %08X => %08X", io, (addr&0xFFF), val, addr );
126 io->io_write( addr&0xFFF, val );
127 }
128 }
130 int32_t sh4_read_phys_word( sh4addr_t addr )
131 {
132 sh4ptr_t page;
133 if( addr >= 0xE0000000 ) /* P4 Area, handled specially */
134 return SIGNEXT16(sh4_read_p4( addr ));
136 if( (addr&0x1F800000) == 0x04000000 ) {
137 addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);
138 }
140 page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
141 if( ((uintptr_t)page) < MAX_IO_REGIONS ) { /* IO Region */
142 if( page == NULL ) {
143 WARN( "Attempted word read to missing page: %08X",
144 addr );
145 return 0;
146 }
147 return SIGNEXT16(io_rgn[(uintptr_t)page]->io_read(addr&0xFFF));
148 } else {
149 return SIGNEXT16(*(int16_t *)(page+(addr&0xFFF)));
150 }
151 }
153 /**
154 * Convenience function to read a quad-word (implemented as two long reads).
155 */
156 int64_t FASTCALL sh4_read_quad( sh4addr_t addr )
157 {
158 return ((int64_t)((uint32_t)sh4_read_long(addr))) |
159 (((int64_t)((uint32_t)sh4_read_long(addr+4))) << 32);
160 }
162 int32_t FASTCALL sh4_read_long( sh4addr_t addr )
163 {
164 sh4ptr_t page;
166 CHECK_READ_WATCH(addr,4);
168 if( addr >= 0xE0000000 ) { /* P4 Area, handled specially */
169 return ZEROEXT32(sh4_read_p4( addr ));
170 } else if( (addr&0x1C000000) == 0x0C000000 ) {
171 return ZEROEXT32(*(int32_t *)(sh4_main_ram + (addr&0x00FFFFFF)));
172 } else if( (addr&0x1F800000) == 0x04000000 ) {
173 addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);
174 pvr2_render_buffer_invalidate(addr, FALSE);
175 } else if( (addr&0x1F800000) == 0x05000000 ) {
176 pvr2_render_buffer_invalidate(addr, FALSE);
177 }
179 page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
180 if( ((uintptr_t)page) < MAX_IO_REGIONS ) { /* IO Region */
181 int32_t val;
182 if( page == NULL ) {
183 WARN( "Attempted long read to missing page: %08X", addr );
184 return 0;
185 }
186 val = io_rgn[(uintptr_t)page]->io_read(addr&0xFFF);
187 TRACE_IO( "Long read %08X <= %08X", page, (addr&0xFFF), val, addr );
188 return ZEROEXT32(val);
189 } else {
190 return ZEROEXT32(*(int32_t *)(page+(addr&0xFFF)));
191 }
192 }
194 int32_t FASTCALL sh4_read_word( sh4addr_t addr )
195 {
196 sh4ptr_t page;
198 CHECK_READ_WATCH(addr,2);
200 if( addr >= 0xE0000000 ) { /* P4 Area, handled specially */
201 return ZEROEXT32(SIGNEXT16(sh4_read_p4( addr )));
202 } else if( (addr&0x1C000000) == 0x0C000000 ) {
203 return ZEROEXT32(SIGNEXT16(*(int16_t *)(sh4_main_ram + (addr&0x00FFFFFF))));
204 } else if( (addr&0x1F800000) == 0x04000000 ) {
205 addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);
206 pvr2_render_buffer_invalidate(addr, FALSE);
207 } else if( (addr&0x1F800000) == 0x05000000 ) {
208 pvr2_render_buffer_invalidate(addr, FALSE);
209 }
211 page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
212 if( ((uintptr_t)page) < MAX_IO_REGIONS ) { /* IO Region */
213 int32_t val;
214 if( page == NULL ) {
215 WARN( "Attempted word read to missing page: %08X", addr );
216 return 0;
217 }
218 val = SIGNEXT16(io_rgn[(uintptr_t)page]->io_read(addr&0xFFF));
219 TRACE_IO( "Word read %04X <= %08X", page, (addr&0xFFF), val&0xFFFF, addr );
220 return ZEROEXT32(val);
221 } else {
222 return ZEROEXT32(SIGNEXT16(*(int16_t *)(page+(addr&0xFFF))));
223 }
224 }
226 int32_t FASTCALL sh4_read_byte( sh4addr_t addr )
227 {
228 sh4ptr_t page;
230 CHECK_READ_WATCH(addr,1);
232 if( addr >= 0xE0000000 ) { /* P4 Area, handled specially */
233 return ZEROEXT32(SIGNEXT8(sh4_read_p4( addr )));
234 } else if( (addr&0x1C000000) == 0x0C000000 ) {
235 return ZEROEXT32(SIGNEXT8(*(int8_t *)(sh4_main_ram + (addr&0x00FFFFFF))));
236 } else if( (addr&0x1F800000) == 0x04000000 ) {
237 addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);
238 pvr2_render_buffer_invalidate(addr, FALSE);
239 } else if( (addr&0x1F800000) == 0x05000000 ) {
240 pvr2_render_buffer_invalidate(addr, FALSE);
241 }
244 page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
245 if( ((uintptr_t)page) < MAX_IO_REGIONS ) { /* IO Region */
246 int32_t val;
247 if( page == NULL ) {
248 WARN( "Attempted byte read to missing page: %08X", addr );
249 return 0;
250 }
251 val = SIGNEXT8(io_rgn[(uintptr_t)page]->io_read(addr&0xFFF));
252 TRACE_IO( "Byte read %02X <= %08X", page, (addr&0xFFF), val&0xFF, addr );
253 return ZEROEXT32(val);
254 } else {
255 return ZEROEXT32(SIGNEXT8(*(int8_t *)(page+(addr&0xFFF))));
256 }
257 }
259 /**
260 * Convenience function to write a quad-word (implemented as two long writes).
261 */
262 void FASTCALL sh4_write_quad( sh4addr_t addr, uint64_t val )
263 {
264 sh4_write_long( addr, (uint32_t)val );
265 sh4_write_long( addr+4, (uint32_t)(val>>32) );
266 }
268 void FASTCALL sh4_write_long( sh4addr_t addr, uint32_t val )
269 {
270 sh4ptr_t page;
272 CHECK_WRITE_WATCH(addr,4,val);
274 if( addr >= 0xE0000000 ) {
275 if( addr < 0xE4000000 ) { // Shortcut for the extremely common case
276 SH4_WRITE_STORE_QUEUE( addr, val );
277 } else {
278 sh4_write_p4( addr, val );
279 }
280 return;
281 } else if( (addr&0x1C000000) == 0x0C000000 ) {
282 *(uint32_t *)(sh4_main_ram + (addr&0x00FFFFFF)) = val;
283 xlat_invalidate_long(addr);
284 return;
285 } else if( (addr&0x1F800000) == 0x04000000 ||
286 (addr&0x1F800000) == 0x11000000 ) {
287 texcache_invalidate_page(addr& 0x7FFFFF);
288 addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);
289 pvr2_render_buffer_invalidate(addr, TRUE);
290 } else if( (addr&0x1F800000) == 0x05000000 ) {
291 pvr2_render_buffer_invalidate(addr, TRUE);
292 }
294 if( (addr&0x1FFFFFFF) < 0x200000 ) {
295 WARN( "Attempted write to read-only memory: %08X => %08X", val, addr);
296 sh4_stop();
297 return;
298 }
299 if( (addr&0x1F800000) == 0x00800000 )
300 asic_g2_write_word();
302 page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
303 if( ((uintptr_t)page) < MAX_IO_REGIONS ) { /* IO Region */
304 if( page == NULL ) {
305 if( (addr & 0x1F000000) >= 0x04000000 &&
306 (addr & 0x1F000000) < 0x07000000 )
307 return;
308 WARN( "Long write to missing page: %08X => %08X", val, addr );
309 return;
310 }
311 TRACE_IO( "Long write %08X => %08X", page, (addr&0xFFF), val, addr );
312 io_rgn[(uintptr_t)page]->io_write(addr&0xFFF, val);
313 } else {
314 *(uint32_t *)(page+(addr&0xFFF)) = val;
315 }
316 }
318 void FASTCALL sh4_write_word( sh4addr_t addr, uint32_t val )
319 {
320 sh4ptr_t page;
322 CHECK_WRITE_WATCH(addr,2,val);
324 if( addr >= 0xE0000000 ) {
325 sh4_write_p4( addr, (int16_t)val );
326 return;
327 } else if( (addr&0x1C000000) == 0x0C000000 ) {
328 *(uint16_t *)(sh4_main_ram + (addr&0x00FFFFFF)) = val;
329 xlat_invalidate_word(addr);
330 return;
331 } else if( (addr&0x1F800000) == 0x04000000 ||
332 (addr&0x1F800000) == 0x11000000 ) {
333 texcache_invalidate_page(addr& 0x7FFFFF);
334 addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);
335 pvr2_render_buffer_invalidate(addr, TRUE);
336 } else if( (addr&0x1F800000) == 0x05000000 ) {
337 pvr2_render_buffer_invalidate(addr, TRUE);
338 }
340 if( (addr&0x1FFFFFFF) < 0x200000 ) {
341 WARN( "Attempted write to read-only memory: %08X => %08X", val, addr);
342 sh4_stop();
343 return;
344 }
345 page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
346 if( ((uintptr_t)page) < MAX_IO_REGIONS ) { /* IO Region */
347 if( page == NULL ) {
348 WARN( "Attempted word write to missing page: %08X", addr );
349 return;
350 }
351 TRACE_IO( "Word write %04X => %08X", page, (addr&0xFFF), val&0xFFFF, addr );
352 io_rgn[(uintptr_t)page]->io_write(addr&0xFFF, val);
353 } else {
354 *(uint16_t *)(page+(addr&0xFFF)) = val;
355 }
356 }
358 void FASTCALL sh4_write_byte( sh4addr_t addr, uint32_t val )
359 {
360 sh4ptr_t page;
362 CHECK_WRITE_WATCH(addr,1,val);
364 if( addr >= 0xE0000000 ) {
365 sh4_write_p4( addr, (int8_t)val );
366 return;
367 } else if( (addr&0x1C000000) == 0x0C000000 ) {
368 *(uint8_t *)(sh4_main_ram + (addr&0x00FFFFFF)) = val;
369 xlat_invalidate_word(addr);
370 return;
371 } else if( (addr&0x1F800000) == 0x04000000 ||
372 (addr&0x1F800000) == 0x11000000 ) {
373 texcache_invalidate_page(addr& 0x7FFFFF);
374 addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);
375 pvr2_render_buffer_invalidate(addr, TRUE);
376 } else if( (addr&0x1F800000) == 0x05000000 ) {
377 pvr2_render_buffer_invalidate(addr, TRUE);
378 }
380 if( (addr&0x1FFFFFFF) < 0x200000 ) {
381 WARN( "Attempted write to read-only memory: %08X => %08X", val, addr);
382 sh4_stop();
383 return;
384 }
385 page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
386 if( ((uintptr_t)page) < MAX_IO_REGIONS ) { /* IO Region */
387 if( page == NULL ) {
388 WARN( "Attempted byte write to missing page: %08X", addr );
389 return;
390 }
391 TRACE_IO( "Byte write %02X => %08X", page, (addr&0xFFF), val&0xFF, addr );
392 io_rgn[(uintptr_t)page]->io_write( (addr&0xFFF), val);
393 } else {
394 *(uint8_t *)(page+(addr&0xFFF)) = val;
395 }
396 }
400 /* FIXME: Handle all the many special cases when the range doesn't fall cleanly
401 * into the same memory block
402 */
403 void mem_copy_from_sh4( sh4ptr_t dest, sh4addr_t srcaddr, size_t count ) {
404 if( srcaddr >= 0x04000000 && srcaddr < 0x05000000 ) {
405 pvr2_vram64_read( dest, srcaddr, count );
406 } else {
407 sh4ptr_t src = mem_get_region(srcaddr);
408 if( src == NULL ) {
409 WARN( "Attempted block read from unknown address %08X", srcaddr );
410 } else {
411 memcpy( dest, src, count );
412 }
413 }
414 }
416 void mem_copy_to_sh4( sh4addr_t destaddr, sh4ptr_t src, size_t count ) {
417 if( destaddr >= 0x10000000 && destaddr < 0x14000000 ) {
418 pvr2_dma_write( destaddr, src, count );
419 return;
420 } else if( (destaddr & 0x1F800000) == 0x05000000 ) {
421 pvr2_render_buffer_invalidate( destaddr, TRUE );
422 } else if( (destaddr & 0x1F800000) == 0x04000000 ) {
423 pvr2_vram64_write( destaddr, src, count );
424 return;
425 }
426 sh4ptr_t dest = mem_get_region(destaddr);
427 if( dest == NULL )
428 WARN( "Attempted block write to unknown address %08X", destaddr );
429 else {
430 xlat_invalidate_block( destaddr, count );
431 memcpy( dest, src, count );
432 }
433 }
435 sh4ptr_t sh4_get_region_by_vma( sh4addr_t vma )
436 {
437 sh4addr_t addr = mmu_vma_to_phys_read(vma);
438 if( addr == MMU_VMA_ERROR ) {
439 return NULL;
440 }
442 sh4ptr_t page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
443 if( ((uintptr_t)page) < MAX_IO_REGIONS ) { /* IO Region */
444 return NULL;
445 } else {
446 return page+(addr&0xFFF);
447 }
448 }
.