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
6 * Copyright (c) 2005 Nathan Keynes.
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.
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.
19 #define MODULE sh4_module
26 #include "dreamcast.h"
27 #include "sh4/sh4core.h"
28 #include "sh4/sh4mmio.h"
29 #include "sh4/xltcache.h"
30 #include "pvr2/pvr2.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 )
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); \
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); \
50 #define CHECK_READ_WATCH( addr, size )
51 #define CHECK_WRITE_WATCH( addr, size, val )
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) )
64 #define TRACE_IO( str, p, r, ... )
65 #define TRACE_P4IO( str, io, r, ... )
68 extern struct mem_region mem_rgn[];
69 extern struct mmio_region *P4_io[];
71 int32_t FASTCALL sh4_read_p4( sh4addr_t addr )
73 struct mmio_region *io = P4_io[(addr&0x1FFFFFFF)>>19];
75 switch( addr & 0x1F000000 ) {
76 case 0x00000000: case 0x01000000: case 0x02000000: case 0x03000000:
77 /* Store queue - readable? */
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 );
89 WARN( "Attempted read from unknown or invalid P4 region: %08X", addr );
93 int32_t val = io->io_read( addr&0xFFF );
94 TRACE_P4IO( "Long read %08X <= %08X", io, (addr&0xFFF), val, addr );
99 void FASTCALL sh4_write_p4( sh4addr_t addr, int32_t val )
101 struct mmio_region *io = P4_io[(addr&0x1FFFFFFF)>>19];
103 switch( addr & 0x1F000000 ) {
104 case 0x00000000: case 0x01000000: case 0x02000000: case 0x03000000:
106 SH4_WRITE_STORE_QUEUE( addr, val );
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;
117 if( (addr & 0xFFFF0000 ) == 0xFF940000 ||
118 (addr & 0xFFFF0000 ) == 0xFF900000 ) {
119 // SDRAM configuration, ignore for now
121 WARN( "Attempted write to unknown P4 region: %08X", addr );
125 TRACE_P4IO( "Long write %08X => %08X", io, (addr&0xFFF), val, addr );
126 io->io_write( addr&0xFFF, val );
130 int32_t sh4_read_phys_word( sh4addr_t addr )
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);
140 page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
141 if( ((uintptr_t)page) < MAX_IO_REGIONS ) { /* IO Region */
143 WARN( "Attempted word read to missing page: %08X",
147 return SIGNEXT16(io_rgn[(uintptr_t)page]->io_read(addr&0xFFF));
149 return SIGNEXT16(*(int16_t *)(page+(addr&0xFFF)));
154 * Convenience function to read a quad-word (implemented as two long reads).
156 int64_t FASTCALL sh4_read_quad( sh4addr_t addr )
158 return ((int64_t)((uint32_t)sh4_read_long(addr))) |
159 (((int64_t)((uint32_t)sh4_read_long(addr+4))) << 32);
162 int32_t FASTCALL sh4_read_long( sh4addr_t addr )
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);
179 page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
180 if( ((uintptr_t)page) < MAX_IO_REGIONS ) { /* IO Region */
183 WARN( "Attempted long read to missing page: %08X", addr );
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);
190 return ZEROEXT32(*(int32_t *)(page+(addr&0xFFF)));
194 int32_t FASTCALL sh4_read_word( sh4addr_t addr )
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);
211 page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
212 if( ((uintptr_t)page) < MAX_IO_REGIONS ) { /* IO Region */
215 WARN( "Attempted word read to missing page: %08X", addr );
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);
222 return ZEROEXT32(SIGNEXT16(*(int16_t *)(page+(addr&0xFFF))));
226 int32_t FASTCALL sh4_read_byte( sh4addr_t addr )
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);
244 page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
245 if( ((uintptr_t)page) < MAX_IO_REGIONS ) { /* IO Region */
248 WARN( "Attempted byte read to missing page: %08X", addr );
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);
255 return ZEROEXT32(SIGNEXT8(*(int8_t *)(page+(addr&0xFFF))));
260 * Convenience function to write a quad-word (implemented as two long writes).
262 void FASTCALL sh4_write_quad( sh4addr_t addr, uint64_t val )
264 sh4_write_long( addr, (uint32_t)val );
265 sh4_write_long( addr+4, (uint32_t)(val>>32) );
268 void FASTCALL sh4_write_long( sh4addr_t addr, uint32_t val )
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 );
278 sh4_write_p4( addr, val );
281 } else if( (addr&0x1C000000) == 0x0C000000 ) {
282 *(uint32_t *)(sh4_main_ram + (addr&0x00FFFFFF)) = val;
283 xlat_invalidate_long(addr);
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);
294 if( (addr&0x1FFFFFFF) < 0x200000 ) {
295 WARN( "Attempted write to read-only memory: %08X => %08X", val, addr);
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 */
305 if( (addr & 0x1F000000) >= 0x04000000 &&
306 (addr & 0x1F000000) < 0x07000000 )
308 WARN( "Long write to missing page: %08X => %08X", val, addr );
311 TRACE_IO( "Long write %08X => %08X", page, (addr&0xFFF), val, addr );
312 io_rgn[(uintptr_t)page]->io_write(addr&0xFFF, val);
314 *(uint32_t *)(page+(addr&0xFFF)) = val;
318 void FASTCALL sh4_write_word( sh4addr_t addr, uint32_t val )
322 CHECK_WRITE_WATCH(addr,2,val);
324 if( addr >= 0xE0000000 ) {
325 sh4_write_p4( addr, (int16_t)val );
327 } else if( (addr&0x1C000000) == 0x0C000000 ) {
328 *(uint16_t *)(sh4_main_ram + (addr&0x00FFFFFF)) = val;
329 xlat_invalidate_word(addr);
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);
340 if( (addr&0x1FFFFFFF) < 0x200000 ) {
341 WARN( "Attempted write to read-only memory: %08X => %08X", val, addr);
345 page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
346 if( ((uintptr_t)page) < MAX_IO_REGIONS ) { /* IO Region */
348 WARN( "Attempted word write to missing page: %08X", addr );
351 TRACE_IO( "Word write %04X => %08X", page, (addr&0xFFF), val&0xFFFF, addr );
352 io_rgn[(uintptr_t)page]->io_write(addr&0xFFF, val);
354 *(uint16_t *)(page+(addr&0xFFF)) = val;
358 void FASTCALL sh4_write_byte( sh4addr_t addr, uint32_t val )
362 CHECK_WRITE_WATCH(addr,1,val);
364 if( addr >= 0xE0000000 ) {
365 sh4_write_p4( addr, (int8_t)val );
367 } else if( (addr&0x1C000000) == 0x0C000000 ) {
368 *(uint8_t *)(sh4_main_ram + (addr&0x00FFFFFF)) = val;
369 xlat_invalidate_word(addr);
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);
380 if( (addr&0x1FFFFFFF) < 0x200000 ) {
381 WARN( "Attempted write to read-only memory: %08X => %08X", val, addr);
385 page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
386 if( ((uintptr_t)page) < MAX_IO_REGIONS ) { /* IO Region */
388 WARN( "Attempted byte write to missing page: %08X", addr );
391 TRACE_IO( "Byte write %02X => %08X", page, (addr&0xFFF), val&0xFF, addr );
392 io_rgn[(uintptr_t)page]->io_write( (addr&0xFFF), val);
394 *(uint8_t *)(page+(addr&0xFFF)) = val;
400 /* FIXME: Handle all the many special cases when the range doesn't fall cleanly
401 * into the same memory block
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 );
407 sh4ptr_t src = mem_get_region(srcaddr);
409 WARN( "Attempted block read from unknown address %08X", srcaddr );
411 memcpy( dest, src, count );
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 );
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 );
426 sh4ptr_t dest = mem_get_region(destaddr);
428 WARN( "Attempted block write to unknown address %08X", destaddr );
430 xlat_invalidate_block( destaddr, count );
431 memcpy( dest, src, count );
435 sh4ptr_t sh4_get_region_by_vma( sh4addr_t vma )
437 sh4addr_t addr = mmu_vma_to_phys_read(vma);
438 if( addr == MMU_VMA_ERROR ) {
442 sh4ptr_t page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
443 if( ((uintptr_t)page) < MAX_IO_REGIONS ) { /* IO Region */
446 return page+(addr&0xFFF);
.