2 * $Id: sh4mem.c,v 1.9 2006-03-30 11:26:45 nkeynes Exp $
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
28 #include "dreamcast.h"
29 #include "pvr2/pvr2.h"
31 #define OC_BASE 0x1C000000
32 #define OC_TOP 0x20000000
34 #define TRANSLATE_VIDEO_64BIT_ADDRESS(a) ( (((a)&0x00FFFFF8)>>1)|(((a)&0x00000004)<<20)|((a)&0x03)|0x05000000 )
37 #define CHECK_READ_WATCH( addr, size ) \
38 if( mem_is_watched(addr,size,WATCH_READ) != NULL ) { \
39 WARN( "Watch triggered at %08X by %d byte read", addr, size ); \
42 #define CHECK_WRITE_WATCH( addr, size, val ) \
43 if( mem_is_watched(addr,size,WATCH_WRITE) != NULL ) { \
44 WARN( "Watch triggered at %08X by %d byte write <= %0*X", addr, size, size*2, val ); \
48 #define CHECK_READ_WATCH( addr, size )
49 #define CHECK_WRITE_WATCH( addr, size )
52 #define TRACE_IO( str, p, r, ... ) if(io_rgn[(uint32_t)p]->trace_flag) \
53 TRACE( str " [%s.%s: %s]", __VA_ARGS__, \
54 MMIO_NAME_BYNUM((uint32_t)p), MMIO_REGID_BYNUM((uint32_t)p, r), \
55 MMIO_REGDESC_BYNUM((uint32_t)p, r) )
57 extern struct mem_region mem_rgn[];
58 extern struct mmio_region *P4_io[];
60 int32_t sh4_read_p4( uint32_t addr )
62 struct mmio_region *io = P4_io[(addr&0x1FFFFFFF)>>19];
64 ERROR( "Attempted read from unknown P4 region: %08X", addr );
67 return io->io_read( addr&0xFFF );
71 void sh4_write_p4( uint32_t addr, int32_t val )
73 struct mmio_region *io = P4_io[(addr&0x1FFFFFFF)>>19];
75 if( (addr & 0xFC000000) == 0xE0000000 ) {
77 SH4_WRITE_STORE_QUEUE( addr, val );
78 } else if( (addr & 0xFF000000) != 0xF4000000 ) {
79 /* OC address cache isn't implemented, but don't complain about it.
80 * Complain about anything else though */
81 ERROR( "Attempted write to unknown P4 region: %08X", addr );
84 io->io_write( addr&0xFFF, val );
88 int32_t sh4_read_phys_word( uint32_t addr )
91 if( addr >= 0xE0000000 ) /* P4 Area, handled specially */
92 return SIGNEXT16(sh4_read_p4( addr ));
94 if( (addr&0x1F800000) == 0x04000000 ) {
95 addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);
98 page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
99 if( ((uint32_t)page) < MAX_IO_REGIONS ) { /* IO Region */
101 ERROR( "Attempted word read to missing page: %08X",
105 return SIGNEXT16(io_rgn[(uint32_t)page]->io_read(addr&0xFFF));
107 return SIGNEXT16(*(int16_t *)(page+(addr&0xFFF)));
111 int32_t sh4_read_long( uint32_t addr )
115 CHECK_READ_WATCH(addr,4);
117 if( addr >= 0xE0000000 ) /* P4 Area, handled specially */
118 return sh4_read_p4( addr );
120 if( (addr&0x1F800000) == 0x04000000 ) {
121 addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);
124 if( IS_MMU_ENABLED() ) {
125 ERROR( "user-mode & mmu translation not implemented, aborting", NULL );
130 page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
131 if( ((uint32_t)page) < MAX_IO_REGIONS ) { /* IO Region */
134 ERROR( "Attempted long read to missing page: %08X", addr );
137 val = io_rgn[(uint32_t)page]->io_read(addr&0xFFF);
138 TRACE_IO( "Long read %08X <= %08X", page, (addr&0xFFF), val, addr );
141 return *(int32_t *)(page+(addr&0xFFF));
145 int32_t sh4_read_word( uint32_t addr )
149 CHECK_READ_WATCH(addr,2);
151 if( addr >= 0xE0000000 ) /* P4 Area, handled specially */
152 return SIGNEXT16(sh4_read_p4( addr ));
154 if( (addr&0x1F800000) == 0x04000000 ) {
155 addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);
158 if( IS_MMU_ENABLED() ) {
159 ERROR( "user-mode & mmu translation not implemented, aborting", NULL );
164 page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
165 if( ((uint32_t)page) < MAX_IO_REGIONS ) { /* IO Region */
168 ERROR( "Attempted word read to missing page: %08X", addr );
171 val = SIGNEXT16(io_rgn[(uint32_t)page]->io_read(addr&0xFFF));
172 TRACE_IO( "Word read %04X <= %08X", page, (addr&0xFFF), val&0xFFFF, addr );
175 return SIGNEXT16(*(int16_t *)(page+(addr&0xFFF)));
179 int32_t sh4_read_byte( uint32_t addr )
183 CHECK_READ_WATCH(addr,1);
185 if( addr >= 0xE0000000 ) /* P4 Area, handled specially */
186 return SIGNEXT8(sh4_read_p4( addr ));
187 if( (addr&0x1F800000) == 0x04000000 ) {
188 addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);
191 if( IS_MMU_ENABLED() ) {
192 ERROR( "user-mode & mmu translation not implemented, aborting", NULL );
197 page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
198 if( ((uint32_t)page) < MAX_IO_REGIONS ) { /* IO Region */
201 ERROR( "Attempted byte read to missing page: %08X", addr );
204 val = SIGNEXT8(io_rgn[(uint32_t)page]->io_read(addr&0xFFF));
205 TRACE_IO( "Byte read %02X <= %08X", page, (addr&0xFFF), val&0xFF, addr );
208 return SIGNEXT8(*(int8_t *)(page+(addr&0xFFF)));
212 void sh4_write_long( uint32_t addr, uint32_t val )
216 CHECK_WRITE_WATCH(addr,4,val);
218 if( addr >= 0xE0000000 ) {
219 sh4_write_p4( addr, val );
222 if( (addr&0x1F800000) == 0x04000000 ||
223 (addr&0x1F800000) == 0x11000000 ) {
224 addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);
227 if( IS_MMU_ENABLED() ) {
228 ERROR( "user-mode & mmu translation not implemented, aborting", NULL );
232 if( (addr&0x1FFFFFFF) < 0x200000 ) {
233 ERROR( "Attempted write to read-only memory: %08X => %08X", val, addr);
237 page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
238 if( ((uint32_t)page) < MAX_IO_REGIONS ) { /* IO Region */
240 ERROR( "Long write to missing page: %08X => %08X", val, addr );
243 TRACE_IO( "Long write %08X => %08X", page, (addr&0xFFF), val, addr );
244 io_rgn[(uint32_t)page]->io_write(addr&0xFFF, val);
246 *(uint32_t *)(page+(addr&0xFFF)) = val;
250 void sh4_write_word( uint32_t addr, uint32_t val )
254 CHECK_WRITE_WATCH(addr,2,val);
256 if( addr >= 0xE0000000 ) {
257 sh4_write_p4( addr, (int16_t)val );
260 if( (addr&0x1F800000) == 0x04000000 ||
261 (addr&0x1F800000) == 0x11000000 ) {
262 addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);
264 if( IS_MMU_ENABLED() ) {
265 ERROR( "user-mode & mmu translation not implemented, aborting", NULL );
269 page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
270 if( ((uint32_t)page) < MAX_IO_REGIONS ) { /* IO Region */
272 ERROR( "Attempted word write to missing page: %08X", addr );
275 TRACE_IO( "Word write %04X => %08X", page, (addr&0xFFF), val&0xFFFF, addr );
276 io_rgn[(uint32_t)page]->io_write(addr&0xFFF, val);
278 *(uint16_t *)(page+(addr&0xFFF)) = val;
282 void sh4_write_byte( uint32_t addr, uint32_t val )
286 CHECK_WRITE_WATCH(addr,1,val);
288 if( addr >= 0xE0000000 ) {
289 sh4_write_p4( addr, (int8_t)val );
292 if( (addr&0x1F800000) == 0x04000000 ||
293 (addr&0x1F800000) == 0x11000000 ) {
294 addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);
297 if( IS_MMU_ENABLED() ) {
298 ERROR( "user-mode & mmu translation not implemented, aborting", NULL );
302 page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
303 if( ((uint32_t)page) < MAX_IO_REGIONS ) { /* IO Region */
305 ERROR( "Attempted byte write to missing page: %08X", addr );
308 TRACE_IO( "Byte write %02X => %08X", page, (addr&0xFFF), val&0xFF, addr );
309 io_rgn[(uint32_t)page]->io_write( (addr&0xFFF), val);
311 *(uint8_t *)(page+(addr&0xFFF)) = val;
317 /* FIXME: Handle all the many special cases when the range doesn't fall cleanly
318 * into the same memory black
320 void mem_copy_from_sh4( char *dest, uint32_t srcaddr, size_t count ) {
321 if( srcaddr >= 0x04000000 && srcaddr < 0x05000000 ) {
322 pvr2_vram64_read( dest, srcaddr, count );
324 char *src = mem_get_region(srcaddr);
326 ERROR( "Attempted block read from unknown address %08X", srcaddr );
328 memcpy( dest, src, count );
333 void mem_copy_to_sh4( uint32_t destaddr, char *src, size_t count ) {
334 if( destaddr >= 0x10000000 && destaddr < 0x11000000 ) {
335 pvr2_ta_write( src, count );
336 } else if( destaddr >= 0x04000000 && destaddr < 0x05000000 ||
337 destaddr >= 0x11000000 && destaddr < 0x12000000 ) {
338 pvr2_vram64_write( destaddr, src, count );
340 char *dest = mem_get_region(destaddr);
342 ERROR( "Attempted block write to unknown address %08X", destaddr );
344 memcpy( dest, src, count );
.