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filename src/sh4/sh4mem.c
changeset 130:279acbacc298
prev103:9b9cfc5855e0
next137:41907543d890
author nkeynes
date Thu Mar 30 11:26:45 2006 +0000 (14 years ago)
permissions -rw-r--r--
last change Treat the 0x11000000 region as write-only texture ram (appears to be correct)
view annotate diff log raw 
     1 /**

     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

     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 "sh4core.h"

    27 #include "sh4mmio.h"

    28 #include "dreamcast.h"

    29 #include "pvr2/pvr2.h"

    30 

    31 #define OC_BASE 0x1C000000

    32 #define OC_TOP  0x20000000

    33 

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

    35 

    36 #ifdef ENABLE_WATCH

    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 ); \

    40         dreamcast_stop(); \

    41     }

    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 ); \

    45         dreamcast_stop(); \

    46     }

    47 #else

    48 #define CHECK_READ_WATCH( addr, size )

    49 #define CHECK_WRITE_WATCH( addr, size )

    50 #endif

    51 

    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) )

    56 

    57 extern struct mem_region mem_rgn[];

    58 extern struct mmio_region *P4_io[];

    59 

    60 int32_t sh4_read_p4( uint32_t addr )

    61 {

    62     struct mmio_region *io = P4_io[(addr&0x1FFFFFFF)>>19];

    63     if( !io ) {

    64         ERROR( "Attempted read from unknown P4 region: %08X", addr );

    65         return 0;

    66     } else {

    67         return io->io_read( addr&0xFFF );

    68     }    

    69 }

    70 

    71 void sh4_write_p4( uint32_t addr, int32_t val )

    72 {

    73     struct mmio_region *io = P4_io[(addr&0x1FFFFFFF)>>19];

    74     if( !io ) {

    75         if( (addr & 0xFC000000) == 0xE0000000 ) {

    76             /* Store queue */

    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 );

    82         }

    83     } else {

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

    85     }

    86 }

    87 

    88 int32_t sh4_read_phys_word( uint32_t addr )

    89 {

    90     char *page;

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

    92         return SIGNEXT16(sh4_read_p4( addr ));

    93     

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

    95         addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);

    96     }

    97 

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

    99     if( ((uint32_t)page) < MAX_IO_REGIONS ) { /* IO Region */

   100         if( page == NULL ) {

   101             ERROR( "Attempted word read to missing page: %08X",

   102                    addr );

   103             return 0;

   104         }

   105         return SIGNEXT16(io_rgn[(uint32_t)page]->io_read(addr&0xFFF));

   106     } else {

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

   108     }

   109 }

   110 

   111 int32_t sh4_read_long( uint32_t addr )

   112 {

   113     char *page;

   114     

   115     CHECK_READ_WATCH(addr,4);

   116 

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

   118         return sh4_read_p4( addr );

   119     

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

   121         addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);

   122     }

   123 

   124     if( IS_MMU_ENABLED() ) {

   125         ERROR( "user-mode & mmu translation not implemented, aborting", NULL );

   126         sh4_stop();

   127         return 0;

   128     }

   129 

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

   131     if( ((uint32_t)page) < MAX_IO_REGIONS ) { /* IO Region */

   132         int32_t val;

   133         if( page == NULL ) {

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

   135             return 0;

   136         }

   137         val = io_rgn[(uint32_t)page]->io_read(addr&0xFFF);

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

   139         return val;

   140     } else {

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

   142     }

   143 }

   144 

   145 int32_t sh4_read_word( uint32_t addr )

   146 {

   147     char *page;

   148 

   149     CHECK_READ_WATCH(addr,2);

   150 

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

   152         return SIGNEXT16(sh4_read_p4( addr ));

   153     

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

   155         addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);

   156     }

   157 

   158     if( IS_MMU_ENABLED() ) {

   159         ERROR( "user-mode & mmu translation not implemented, aborting", NULL );

   160         sh4_stop();

   161         return 0;

   162     }

   163 

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

   165     if( ((uint32_t)page) < MAX_IO_REGIONS ) { /* IO Region */

   166         int32_t val;

   167         if( page == NULL ) {

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

   169             return 0;

   170         }

   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 );

   173         return val;

   174     } else {

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

   176     }

   177 }

   178 

   179 int32_t sh4_read_byte( uint32_t addr )

   180 {

   181     char *page;

   182 

   183     CHECK_READ_WATCH(addr,1);

   184 

   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);

   189     }

   190     

   191     if( IS_MMU_ENABLED() ) {

   192         ERROR( "user-mode & mmu translation not implemented, aborting", NULL );

   193         sh4_stop();

   194         return 0;

   195     }

   196 

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

   198     if( ((uint32_t)page) < MAX_IO_REGIONS ) { /* IO Region */

   199         int32_t val;

   200         if( page == NULL ) {

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

   202             return 0;

   203         }

   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 );

   206         return val;

   207     } else {

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

   209     }

   210 }

   211 

   212 void sh4_write_long( uint32_t addr, uint32_t val )

   213 {

   214     char *page;

   215     

   216     CHECK_WRITE_WATCH(addr,4,val);

   217 

   218     if( addr >= 0xE0000000 ) {

   219         sh4_write_p4( addr, val );

   220         return;

   221     }

   222     if( (addr&0x1F800000) == 0x04000000 || 

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

   224         addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);

   225     }

   226 

   227     if( IS_MMU_ENABLED() ) {

   228         ERROR( "user-mode & mmu translation not implemented, aborting", NULL );

   229         sh4_stop();

   230         return;

   231     }

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

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

   234         sh4_stop();

   235         return;

   236     }

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

   238     if( ((uint32_t)page) < MAX_IO_REGIONS ) { /* IO Region */

   239         if( page == NULL ) {

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

   241             return;

   242         }

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

   244         io_rgn[(uint32_t)page]->io_write(addr&0xFFF, val);

   245     } else {

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

   247     }

   248 }

   249 

   250 void sh4_write_word( uint32_t addr, uint32_t val )

   251 {

   252     char *page;

   253 

   254     CHECK_WRITE_WATCH(addr,2,val);

   255 

   256     if( addr >= 0xE0000000 ) {

   257         sh4_write_p4( addr, (int16_t)val );

   258         return;

   259     }

   260     if( (addr&0x1F800000) == 0x04000000 ||

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

   262         addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);

   263     }

   264     if( IS_MMU_ENABLED() ) {

   265         ERROR( "user-mode & mmu translation not implemented, aborting", NULL );

   266         sh4_stop();

   267         return;

   268     }

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

   270     if( ((uint32_t)page) < MAX_IO_REGIONS ) { /* IO Region */

   271         if( page == NULL ) {

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

   273             return;

   274         }

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

   276         io_rgn[(uint32_t)page]->io_write(addr&0xFFF, val);

   277     } else {

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

   279     }

   280 }

   281 

   282 void sh4_write_byte( uint32_t addr, uint32_t val )

   283 {

   284     char *page;

   285     

   286     CHECK_WRITE_WATCH(addr,1,val);

   287 

   288     if( addr >= 0xE0000000 ) {

   289         sh4_write_p4( addr, (int8_t)val );

   290         return;

   291     }

   292     if( (addr&0x1F800000) == 0x04000000 ||

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

   294         addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);

   295     }

   296     

   297     if( IS_MMU_ENABLED() ) {

   298         ERROR( "user-mode & mmu translation not implemented, aborting", NULL );

   299         sh4_stop();

   300         return;

   301     }

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

   303     if( ((uint32_t)page) < MAX_IO_REGIONS ) { /* IO Region */

   304         if( page == NULL ) {

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

   306             return;

   307         }

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

   309         io_rgn[(uint32_t)page]->io_write( (addr&0xFFF), val);

   310     } else {

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

   312     }

   313 }

   314 

   315 

   316 

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

   318  * into the same memory black

   319  */

   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 );

   323     } else {

   324 	char *src = mem_get_region(srcaddr);

   325 	if( src == NULL ) {

   326 	    ERROR( "Attempted block read from unknown address %08X", srcaddr );

   327 	} else {

   328 	    memcpy( dest, src, count );

   329 	}

   330     }

   331 }

   332 

   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 );

   339     } else {

   340 	char *dest = mem_get_region(destaddr);

   341 	if( dest == NULL )

   342 	    ERROR( "Attempted block write to unknown address %08X", destaddr );

   343 	else {

   344 	    memcpy( dest, src, count );

   345 	}

   346     }

   347 }
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