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filename src/sh4/sh4mem.c
changeset 740:dd11269ee48b
prev736:a02d1475ccfd
next828:b42865f00fb5
author nkeynes
date Sun Aug 24 01:43:17 2008 +0000 (15 years ago)
permissions -rw-r--r--
last change Correct generated UNDEF() => UNDEF(ir) for consistency with UNIMP(ir)
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  */

    18 

    19 #define MODULE sh4_module

    20 

    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"

    32 

    33 #define OC_BASE 0x1C000000

    34 #define OC_TOP  0x20000000

    35 

    36 #define TRANSLATE_VIDEO_64BIT_ADDRESS(a)  ( (((a)&0x00FFFFF8)>>1)|(((a)&0x00000004)<<20)|((a)&0x03)|0x05000000 )

    37 

    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

    53 

    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

    67 

    68 extern struct mem_region mem_rgn[];

    69 extern struct mmio_region *P4_io[];

    70 

    71 int32_t 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 }

    98 

    99 void 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             WARN( "Attempted write to unknown P4 region: %08X", addr );

   118         }

   119     } else {

   120         TRACE_P4IO( "Long write %08X => %08X", io, (addr&0xFFF), val, addr );

   121         io->io_write( addr&0xFFF, val );

   122     }

   123 }

   124 

   125 int32_t sh4_read_phys_word( sh4addr_t addr )

   126 {

   127     sh4ptr_t page;

   128     if( addr >= 0xE0000000 ) /* P4 Area, handled specially */

   129         return SIGNEXT16(sh4_read_p4( addr ));

   130 

   131     if( (addr&0x1F800000) == 0x04000000 ) {

   132         addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);

   133     }

   134 

   135     page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];

   136     if( ((uintptr_t)page) < MAX_IO_REGIONS ) { /* IO Region */

   137         if( page == NULL ) {

   138             WARN( "Attempted word read to missing page: %08X",

   139                     addr );

   140             return 0;

   141         }

   142         return SIGNEXT16(io_rgn[(uintptr_t)page]->io_read(addr&0xFFF));

   143     } else {

   144         return SIGNEXT16(*(int16_t *)(page+(addr&0xFFF)));

   145     }

   146 }

   147 

   148 /**

   149  * Convenience function to read a quad-word (implemented as two long reads).

   150  */

   151 int64_t sh4_read_quad( sh4addr_t addr )

   152 {

   153     return ((int64_t)((uint32_t)sh4_read_long(addr))) |

   154     (((int64_t)((uint32_t)sh4_read_long(addr+4))) << 32);

   155 }

   156 

   157 int32_t sh4_read_long( sh4addr_t addr )

   158 {

   159     sh4ptr_t page;

   160 

   161     CHECK_READ_WATCH(addr,4);

   162 

   163     if( addr >= 0xE0000000 ) { /* P4 Area, handled specially */

   164         return ZEROEXT32(sh4_read_p4( addr ));

   165     } else if( (addr&0x1C000000) == 0x0C000000 ) {

   166         return ZEROEXT32(*(int32_t *)(sh4_main_ram + (addr&0x00FFFFFF)));

   167     } else if( (addr&0x1F800000) == 0x04000000 ) {

   168         addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);

   169         pvr2_render_buffer_invalidate(addr, FALSE);

   170     } else if( (addr&0x1F800000) == 0x05000000 ) {

   171         pvr2_render_buffer_invalidate(addr, FALSE);

   172     }

   173 

   174     page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];

   175     if( ((uintptr_t)page) < MAX_IO_REGIONS ) { /* IO Region */

   176         int32_t val;

   177         if( page == NULL ) {

   178             WARN( "Attempted long read to missing page: %08X", addr );

   179             return 0;

   180         }

   181         val = io_rgn[(uintptr_t)page]->io_read(addr&0xFFF);

   182         TRACE_IO( "Long read %08X <= %08X", page, (addr&0xFFF), val, addr );

   183         return ZEROEXT32(val);

   184     } else {

   185         return ZEROEXT32(*(int32_t *)(page+(addr&0xFFF)));

   186     }

   187 }

   188 

   189 int32_t sh4_read_word( sh4addr_t addr )

   190 {

   191     sh4ptr_t page;

   192 

   193     CHECK_READ_WATCH(addr,2);

   194 

   195     if( addr >= 0xE0000000 ) { /* P4 Area, handled specially */

   196         return ZEROEXT32(SIGNEXT16(sh4_read_p4( addr )));

   197     } else if( (addr&0x1C000000) == 0x0C000000 ) {

   198         return ZEROEXT32(SIGNEXT16(*(int16_t *)(sh4_main_ram + (addr&0x00FFFFFF))));

   199     } else if( (addr&0x1F800000) == 0x04000000 ) {

   200         addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);

   201         pvr2_render_buffer_invalidate(addr, FALSE);

   202     } else if( (addr&0x1F800000) == 0x05000000 ) {

   203         pvr2_render_buffer_invalidate(addr, FALSE);

   204     }

   205 

   206     page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];

   207     if( ((uintptr_t)page) < MAX_IO_REGIONS ) { /* IO Region */

   208         int32_t val;

   209         if( page == NULL ) {

   210             WARN( "Attempted word read to missing page: %08X", addr );

   211             return 0;

   212         }

   213         val = SIGNEXT16(io_rgn[(uintptr_t)page]->io_read(addr&0xFFF));

   214         TRACE_IO( "Word read %04X <= %08X", page, (addr&0xFFF), val&0xFFFF, addr );

   215         return ZEROEXT32(val);

   216     } else {

   217         return ZEROEXT32(SIGNEXT16(*(int16_t *)(page+(addr&0xFFF))));

   218     }

   219 }

   220 

   221 int32_t sh4_read_byte( sh4addr_t addr )

   222 {

   223     sh4ptr_t page;

   224 

   225     CHECK_READ_WATCH(addr,1);

   226 

   227     if( addr >= 0xE0000000 ) { /* P4 Area, handled specially */

   228         return ZEROEXT32(SIGNEXT8(sh4_read_p4( addr )));

   229     } else if( (addr&0x1C000000) == 0x0C000000 ) {

   230         return ZEROEXT32(SIGNEXT8(*(int8_t *)(sh4_main_ram + (addr&0x00FFFFFF))));

   231     } else if( (addr&0x1F800000) == 0x04000000 ) {

   232         addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);

   233         pvr2_render_buffer_invalidate(addr, FALSE);

   234     } else if( (addr&0x1F800000) == 0x05000000 ) {

   235         pvr2_render_buffer_invalidate(addr, FALSE);

   236     }

   237 

   238 

   239     page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];

   240     if( ((uintptr_t)page) < MAX_IO_REGIONS ) { /* IO Region */

   241         int32_t val;

   242         if( page == NULL ) {

   243             WARN( "Attempted byte read to missing page: %08X", addr );

   244             return 0;

   245         }

   246         val = SIGNEXT8(io_rgn[(uintptr_t)page]->io_read(addr&0xFFF));

   247         TRACE_IO( "Byte read %02X <= %08X", page, (addr&0xFFF), val&0xFF, addr );

   248         return ZEROEXT32(val);

   249     } else {

   250         return ZEROEXT32(SIGNEXT8(*(int8_t *)(page+(addr&0xFFF))));

   251     }

   252 }

   253 

   254 /**

   255  * Convenience function to write a quad-word (implemented as two long writes).

   256  */

   257 void sh4_write_quad( sh4addr_t addr, uint64_t val )

   258 {

   259     sh4_write_long( addr, (uint32_t)val );

   260     sh4_write_long( addr+4, (uint32_t)(val>>32) );

   261 }

   262 

   263 void sh4_write_long( sh4addr_t addr, uint32_t val )

   264 {

   265     sh4ptr_t page;

   266 

   267     CHECK_WRITE_WATCH(addr,4,val);

   268 

   269     if( addr >= 0xE0000000 ) {

   270         sh4_write_p4( addr, val );

   271         return;

   272     } else if( (addr&0x1C000000) == 0x0C000000 ) {

   273         *(uint32_t *)(sh4_main_ram + (addr&0x00FFFFFF)) = val;

   274         xlat_invalidate_long(addr);

   275         return;

   276     } else if( (addr&0x1F800000) == 0x04000000 || 

   277             (addr&0x1F800000) == 0x11000000 ) {

   278         texcache_invalidate_page(addr& 0x7FFFFF);

   279         addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);

   280         pvr2_render_buffer_invalidate(addr, TRUE);

   281     } else if( (addr&0x1F800000) == 0x05000000 ) {

   282         pvr2_render_buffer_invalidate(addr, TRUE);

   283     }

   284 

   285     if( (addr&0x1FFFFFFF) < 0x200000 ) {

   286         WARN( "Attempted write to read-only memory: %08X => %08X", val, addr);

   287         sh4_stop();

   288         return;

   289     }

   290     if( (addr&0x1F800000) == 0x00800000 )

   291         asic_g2_write_word();

   292 

   293     page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];

   294     if( ((uintptr_t)page) < MAX_IO_REGIONS ) { /* IO Region */

   295         if( page == NULL ) {

   296             if( (addr & 0x1F000000) >= 0x04000000 &&

   297                     (addr & 0x1F000000) < 0x07000000 )

   298                 return;

   299             WARN( "Long write to missing page: %08X => %08X", val, addr );

   300             return;

   301         }

   302         TRACE_IO( "Long write %08X => %08X", page, (addr&0xFFF), val, addr );

   303         io_rgn[(uintptr_t)page]->io_write(addr&0xFFF, val);

   304     } else {

   305         *(uint32_t *)(page+(addr&0xFFF)) = val;

   306     }

   307 }

   308 

   309 void sh4_write_word( sh4addr_t addr, uint32_t val )

   310 {

   311     sh4ptr_t page;

   312 

   313     CHECK_WRITE_WATCH(addr,2,val);

   314 

   315     if( addr >= 0xE0000000 ) {

   316         sh4_write_p4( addr, (int16_t)val );

   317         return;

   318     } else if( (addr&0x1C000000) == 0x0C000000 ) {

   319         *(uint16_t *)(sh4_main_ram + (addr&0x00FFFFFF)) = val;

   320         xlat_invalidate_word(addr);

   321         return;

   322     } else if( (addr&0x1F800000) == 0x04000000 ||

   323             (addr&0x1F800000) == 0x11000000 ) {

   324         texcache_invalidate_page(addr& 0x7FFFFF);

   325         addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);

   326         pvr2_render_buffer_invalidate(addr, TRUE);

   327     } else if( (addr&0x1F800000) == 0x05000000 ) {

   328         pvr2_render_buffer_invalidate(addr, TRUE);

   329     }

   330 

   331     if( (addr&0x1FFFFFFF) < 0x200000 ) {

   332         WARN( "Attempted write to read-only memory: %08X => %08X", val, addr);

   333         sh4_stop();

   334         return;

   335     }

   336     page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];

   337     if( ((uintptr_t)page) < MAX_IO_REGIONS ) { /* IO Region */

   338         if( page == NULL ) {

   339             WARN( "Attempted word write to missing page: %08X", addr );

   340             return;

   341         }

   342         TRACE_IO( "Word write %04X => %08X", page, (addr&0xFFF), val&0xFFFF, addr );

   343         io_rgn[(uintptr_t)page]->io_write(addr&0xFFF, val);

   344     } else {

   345         *(uint16_t *)(page+(addr&0xFFF)) = val;

   346     }

   347 }

   348 

   349 void sh4_write_byte( sh4addr_t addr, uint32_t val )

   350 {

   351     sh4ptr_t page;

   352 

   353     CHECK_WRITE_WATCH(addr,1,val);

   354 

   355     if( addr >= 0xE0000000 ) {

   356         sh4_write_p4( addr, (int8_t)val );

   357         return;

   358     } else if( (addr&0x1C000000) == 0x0C000000 ) {

   359         *(uint8_t *)(sh4_main_ram + (addr&0x00FFFFFF)) = val;

   360         xlat_invalidate_word(addr);

   361         return;

   362     } else if( (addr&0x1F800000) == 0x04000000 ||

   363             (addr&0x1F800000) == 0x11000000 ) {

   364         texcache_invalidate_page(addr& 0x7FFFFF);

   365         addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);

   366         pvr2_render_buffer_invalidate(addr, TRUE);

   367     } else if( (addr&0x1F800000) == 0x05000000 ) {

   368         pvr2_render_buffer_invalidate(addr, TRUE);

   369     }

   370 

   371     if( (addr&0x1FFFFFFF) < 0x200000 ) {

   372         WARN( "Attempted write to read-only memory: %08X => %08X", val, addr);

   373         sh4_stop();

   374         return;

   375     }

   376     page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];

   377     if( ((uintptr_t)page) < MAX_IO_REGIONS ) { /* IO Region */

   378         if( page == NULL ) {

   379             WARN( "Attempted byte write to missing page: %08X", addr );

   380             return;

   381         }

   382         TRACE_IO( "Byte write %02X => %08X", page, (addr&0xFFF), val&0xFF, addr );

   383         io_rgn[(uintptr_t)page]->io_write( (addr&0xFFF), val);

   384     } else {

   385         *(uint8_t *)(page+(addr&0xFFF)) = val;

   386     }

   387 }

   388 

   389 

   390 

   391 /* FIXME: Handle all the many special cases when the range doesn't fall cleanly

   392  * into the same memory block

   393  */

   394 void mem_copy_from_sh4( sh4ptr_t dest, sh4addr_t srcaddr, size_t count ) {

   395     if( srcaddr >= 0x04000000 && srcaddr < 0x05000000 ) {

   396         pvr2_vram64_read( dest, srcaddr, count );

   397     } else {

   398         sh4ptr_t src = mem_get_region(srcaddr);

   399         if( src == NULL ) {

   400             WARN( "Attempted block read from unknown address %08X", srcaddr );

   401         } else {

   402             memcpy( dest, src, count );

   403         }

   404     }

   405 }

   406 

   407 void mem_copy_to_sh4( sh4addr_t destaddr, sh4ptr_t src, size_t count ) {

   408     if( destaddr >= 0x10000000 && destaddr < 0x14000000 ) {

   409         pvr2_dma_write( destaddr, src, count );

   410         return;

   411     } else if( (destaddr & 0x1F800000) == 0x05000000 ) {

   412         pvr2_render_buffer_invalidate( destaddr, TRUE );

   413     } else if( (destaddr & 0x1F800000) == 0x04000000 ) {

   414         pvr2_vram64_write( destaddr, src, count );

   415         return;

   416     }

   417     sh4ptr_t dest = mem_get_region(destaddr);

   418     if( dest == NULL )

   419         WARN( "Attempted block write to unknown address %08X", destaddr );

   420     else {

   421         xlat_invalidate_block( destaddr, count );

   422         memcpy( dest, src, count );

   423     }

   424 }

   425 

   426 sh4ptr_t sh4_get_region_by_vma( sh4addr_t vma )

   427 {

   428     sh4addr_t addr = mmu_vma_to_phys_read(vma);

   429     if( addr == MMU_VMA_ERROR ) {

   430         return NULL;

   431     }

   432 

   433     sh4ptr_t page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];

   434     if( ((uintptr_t)page) < MAX_IO_REGIONS ) { /* IO Region */

   435         return NULL;

   436     } else {

   437         return page+(addr&0xFFF);

   438     }

   439 }

   440
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