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lxdream.org :: lxdream/src/sh4/sh4mem.c
lxdream 0.9.1
released Jun 29
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filename src/sh4/sh4mem.c
changeset 406:9289b62f8f33
prev400:049d72a7a229
next418:b9b14afa0959
author nkeynes
date Fri Sep 28 07:25:22 2007 +0000 (13 years ago)
permissions -rw-r--r--
last change Remove MMU check (probably shouldn't be here anyway), and disable
TRACE_IO checks by default
file annotate diff log raw
nkeynes@10
     1
/**
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 * $Id: sh4mem.c,v 1.24 2007-09-28 07:25:22 nkeynes Exp $
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 * sh4mem.c is responsible for the SH4's access to memory (including memory
nkeynes@10
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 * mapped I/O), using the page maps created in mem.c
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 *
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 * Copyright (c) 2005 Nathan Keynes.
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 *
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; either version 2 of the License, or
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 * (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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    17
 */
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#define MODULE sh4_module
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#include <string.h>
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#include <zlib.h>
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#include "dream.h"
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#include "mem.h"
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#include "mmio.h"
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#include "sh4core.h"
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#include "sh4mmio.h"
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#include "dreamcast.h"
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#include "pvr2/pvr2.h"
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#define OC_BASE 0x1C000000
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#define OC_TOP  0x20000000
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#define TRANSLATE_VIDEO_64BIT_ADDRESS(a)  ( (((a)&0x00FFFFF8)>>1)|(((a)&0x00000004)<<20)|((a)&0x03)|0x05000000 )
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#ifdef ENABLE_WATCH
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#define CHECK_READ_WATCH( addr, size ) \
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    if( mem_is_watched(addr,size,WATCH_READ) != NULL ) { \
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        WARN( "Watch triggered at %08X by %d byte read", addr, size ); \
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    40
        dreamcast_stop(); \
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    41
    }
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#define CHECK_WRITE_WATCH( addr, size, val )                  \
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    if( mem_is_watched(addr,size,WATCH_WRITE) != NULL ) { \
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        WARN( "Watch triggered at %08X by %d byte write <= %0*X", addr, size, size*2, val ); \
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    45
        dreamcast_stop(); \
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    46
    }
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#else
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#define CHECK_READ_WATCH( addr, size )
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    49
#define CHECK_WRITE_WATCH( addr, size, val )
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#endif
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    51
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    52
#ifdef ENABLE_TRACE_IO
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#define TRACE_IO( str, p, r, ... ) if(io_rgn[(uint32_t)p]->trace_flag && !MMIO_NOTRACE_BYNUM((uint32_t)p,r)) \
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    TRACE( str " [%s.%s: %s]", __VA_ARGS__,			       \
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    MMIO_NAME_BYNUM((uint32_t)p), MMIO_REGID_BYNUM((uint32_t)p, r), \
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    MMIO_REGDESC_BYNUM((uint32_t)p, r) )
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#define TRACE_P4IO( str, io, r, ... ) if(io->trace_flag && !MMIO_NOTRACE_IOBYNUM(io,r)) \
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TRACE( str " [%s.%s: %s]", __VA_ARGS__, \
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    io->id, MMIO_REGID_IOBYNUM(io, r), \
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    MMIO_REGDESC_IOBYNUM(io, r) )
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#else
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#define TRACE_IO( str, p, r, ... )
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#define TRACE_P4IO( str, io, r, ... )
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#endif
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extern struct mem_region mem_rgn[];
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extern struct mmio_region *P4_io[];
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int32_t sh4_read_p4( uint32_t addr )
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{
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    struct mmio_region *io = P4_io[(addr&0x1FFFFFFF)>>19];
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    if( !io ) {
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        if( (addr & 0xFF000000) != 0xF4000000 ) {
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	    /* OC address cache isn't implemented, but don't complain about it.
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	     * Complain about anything else though */
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            ERROR( "Attempted read from unknown P4 region: %08X", addr );
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        }
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        return 0;
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    } else {
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	int32_t val = io->io_read( addr&0xFFF );
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	TRACE_P4IO( "Long read %08X <= %08X", io, (addr&0xFFF), val, addr );
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        return val;
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    }    
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    84
}
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    86
void sh4_write_p4( uint32_t addr, int32_t val )
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{
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    struct mmio_region *io = P4_io[(addr&0x1FFFFFFF)>>19];
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    89
    if( !io ) {
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    90
        if( (addr & 0xFC000000) == 0xE0000000 ) {
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            /* Store queue */
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            SH4_WRITE_STORE_QUEUE( addr, val );
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        } else if( (addr & 0xFF000000) != 0xF4000000 ) {
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	    /* OC address cache isn't implemented, but don't complain about it.
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	     * Complain about anything else though */
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            ERROR( "Attempted write to unknown P4 region: %08X", addr );
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        }
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    } else {
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	TRACE_P4IO( "Long write %08X => %08X", io, (addr&0xFFF), val, addr );
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        io->io_write( addr&0xFFF, val );
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    }
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   102
}
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int32_t sh4_read_phys_word( uint32_t addr )
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   105
{
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    char *page;
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    if( addr >= 0xE0000000 ) /* P4 Area, handled specially */
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        return SIGNEXT16(sh4_read_p4( addr ));
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    if( (addr&0x1F800000) == 0x04000000 ) {
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        addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);
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   112
    }
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    page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
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    if( ((uint32_t)page) < MAX_IO_REGIONS ) { /* IO Region */
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        if( page == NULL ) {
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   117
            ERROR( "Attempted word read to missing page: %08X",
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                   addr );
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            return 0;
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   120
        }
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        return SIGNEXT16(io_rgn[(uint32_t)page]->io_read(addr&0xFFF));
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   122
    } else {
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   123
        return SIGNEXT16(*(int16_t *)(page+(addr&0xFFF)));
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   124
    }
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   125
}
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int32_t sh4_read_long( uint32_t addr )
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{
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   129
    char *page;
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   130
    
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    CHECK_READ_WATCH(addr,4);
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    if( addr >= 0xE0000000 ) /* P4 Area, handled specially */
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        return sh4_read_p4( addr );
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   136
    if( (addr&0x1F800000) == 0x04000000 ) {
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        addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);
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	pvr2_render_buffer_invalidate(addr, FALSE);
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   139
    } else if( (addr&0x1F800000) == 0x05000000 ) {
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	pvr2_render_buffer_invalidate(addr, FALSE);
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   141
    }
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    page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
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    if( ((uint32_t)page) < MAX_IO_REGIONS ) { /* IO Region */
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        int32_t val;
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        if( page == NULL ) {
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            ERROR( "Attempted long read to missing page: %08X", addr );
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            return 0;
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        }
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        val = io_rgn[(uint32_t)page]->io_read(addr&0xFFF);
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        TRACE_IO( "Long read %08X <= %08X", page, (addr&0xFFF), val, addr );
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        return val;
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   153
    } else {
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   154
        return *(int32_t *)(page+(addr&0xFFF));
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   155
    }
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   156
}
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   158
int32_t sh4_read_word( uint32_t addr )
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{
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   160
    char *page;
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   161
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   162
    CHECK_READ_WATCH(addr,2);
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   164
    if( addr >= 0xE0000000 ) /* P4 Area, handled specially */
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        return SIGNEXT16(sh4_read_p4( addr ));
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    if( (addr&0x1F800000) == 0x04000000 ) {
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        addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);
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	pvr2_render_buffer_invalidate(addr, FALSE);
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    } else if( (addr&0x1F800000) == 0x05000000 ) {
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	pvr2_render_buffer_invalidate(addr, FALSE);
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    }
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    page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
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    if( ((uint32_t)page) < MAX_IO_REGIONS ) { /* IO Region */
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        int32_t val;
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        if( page == NULL ) {
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            ERROR( "Attempted word read to missing page: %08X", addr );
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            return 0;
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   180
        }
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        val = SIGNEXT16(io_rgn[(uint32_t)page]->io_read(addr&0xFFF));
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        TRACE_IO( "Word read %04X <= %08X", page, (addr&0xFFF), val&0xFFFF, addr );
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        return val;
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    } else {
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        return SIGNEXT16(*(int16_t *)(page+(addr&0xFFF)));
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    }
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   187
}
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int32_t sh4_read_byte( uint32_t addr )
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   190
{
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    char *page;
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   193
    CHECK_READ_WATCH(addr,1);
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   195
    if( addr >= 0xE0000000 ) /* P4 Area, handled specially */
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        return SIGNEXT8(sh4_read_p4( addr ));
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    if( (addr&0x1F800000) == 0x04000000 ) {
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        addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);
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    	pvr2_render_buffer_invalidate(addr, FALSE);
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   200
    } else if( (addr&0x1F800000) == 0x05000000 ) {
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	pvr2_render_buffer_invalidate(addr, FALSE);
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    }
nkeynes@217
   203
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   204
    
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    page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
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    if( ((uint32_t)page) < MAX_IO_REGIONS ) { /* IO Region */
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        int32_t val;
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   208
        if( page == NULL ) {
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   209
            ERROR( "Attempted byte read to missing page: %08X", addr );
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            return 0;
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   211
        }
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        val = SIGNEXT8(io_rgn[(uint32_t)page]->io_read(addr&0xFFF));
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        TRACE_IO( "Byte read %02X <= %08X", page, (addr&0xFFF), val&0xFF, addr );
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        return val;
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   215
    } else {
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	//	fprintf( stderr, "MOV.B %02X <= %08X\n",(uint32_t)*(uint8_t *)(page+(addr&0xFFF)), addr );
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        return SIGNEXT8(*(int8_t *)(page+(addr&0xFFF)));
nkeynes@10
   218
    }
nkeynes@10
   219
}
nkeynes@10
   220
nkeynes@10
   221
void sh4_write_long( uint32_t addr, uint32_t val )
nkeynes@10
   222
{
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   223
    char *page;
nkeynes@400
   224
nkeynes@400
   225
    // fprintf( stderr, "MOV.L %08X => %08X\n", val, addr );
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    CHECK_WRITE_WATCH(addr,4,val);
nkeynes@10
   227
nkeynes@83
   228
    if( addr >= 0xE0000000 ) {
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   229
        sh4_write_p4( addr, val );
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   230
        return;
nkeynes@10
   231
    }
nkeynes@130
   232
    if( (addr&0x1F800000) == 0x04000000 || 
nkeynes@130
   233
	(addr&0x1F800000) == 0x11000000 ) {
nkeynes@150
   234
	texcache_invalidate_page(addr& 0x7FFFFF);
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   235
        addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);
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   236
	pvr2_render_buffer_invalidate(addr, TRUE);
nkeynes@165
   237
    } else if( (addr&0x1F800000) == 0x05000000 ) {
nkeynes@355
   238
	pvr2_render_buffer_invalidate(addr, TRUE);
nkeynes@10
   239
    }
nkeynes@10
   240
nkeynes@10
   241
    if( (addr&0x1FFFFFFF) < 0x200000 ) {
nkeynes@10
   242
        ERROR( "Attempted write to read-only memory: %08X => %08X", val, addr);
nkeynes@10
   243
        sh4_stop();
nkeynes@10
   244
        return;
nkeynes@10
   245
    }
nkeynes@137
   246
    if( (addr&0x1F800000) == 0x00800000 )
nkeynes@137
   247
	asic_g2_write_word();
nkeynes@137
   248
nkeynes@10
   249
    page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
nkeynes@10
   250
    if( ((uint32_t)page) < MAX_IO_REGIONS ) { /* IO Region */
nkeynes@10
   251
        if( page == NULL ) {
nkeynes@137
   252
	    if( (addr & 0x1F000000) >= 0x04000000 &&
nkeynes@137
   253
		(addr & 0x1F000000) < 0x07000000 )
nkeynes@137
   254
		return;
nkeynes@10
   255
            ERROR( "Long write to missing page: %08X => %08X", val, addr );
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   256
            return;
nkeynes@10
   257
        }
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   258
        TRACE_IO( "Long write %08X => %08X", page, (addr&0xFFF), val, addr );
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   259
        io_rgn[(uint32_t)page]->io_write(addr&0xFFF, val);
nkeynes@10
   260
    } else {
nkeynes@400
   261
	xlat_invalidate_long(addr);
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   262
        *(uint32_t *)(page+(addr&0xFFF)) = val;
nkeynes@10
   263
    }
nkeynes@10
   264
}
nkeynes@10
   265
nkeynes@10
   266
void sh4_write_word( uint32_t addr, uint32_t val )
nkeynes@10
   267
{
nkeynes@10
   268
    char *page;
nkeynes@10
   269
nkeynes@400
   270
    //    fprintf( stderr, "MOV.W %04X => %08X\n", val, addr );
nkeynes@10
   271
    CHECK_WRITE_WATCH(addr,2,val);
nkeynes@10
   272
nkeynes@83
   273
    if( addr >= 0xE0000000 ) {
nkeynes@10
   274
        sh4_write_p4( addr, (int16_t)val );
nkeynes@10
   275
        return;
nkeynes@10
   276
    }
nkeynes@130
   277
    if( (addr&0x1F800000) == 0x04000000 ||
nkeynes@130
   278
	(addr&0x1F800000) == 0x11000000 ) {
nkeynes@150
   279
	texcache_invalidate_page(addr& 0x7FFFFF);
nkeynes@10
   280
        addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);
nkeynes@355
   281
	pvr2_render_buffer_invalidate(addr, TRUE);
nkeynes@165
   282
    } else if( (addr&0x1F800000) == 0x05000000 ) {
nkeynes@355
   283
	pvr2_render_buffer_invalidate(addr, TRUE);
nkeynes@10
   284
    }
nkeynes@406
   285
nkeynes@400
   286
    if( (addr&0x1FFFFFFF) < 0x200000 ) {
nkeynes@400
   287
        ERROR( "Attempted write to read-only memory: %08X => %08X", val, addr);
nkeynes@400
   288
        sh4_stop();
nkeynes@400
   289
        return;
nkeynes@400
   290
    }
nkeynes@10
   291
    page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
nkeynes@10
   292
    if( ((uint32_t)page) < MAX_IO_REGIONS ) { /* IO Region */
nkeynes@10
   293
        if( page == NULL ) {
nkeynes@10
   294
            ERROR( "Attempted word write to missing page: %08X", addr );
nkeynes@10
   295
            return;
nkeynes@10
   296
        }
nkeynes@10
   297
        TRACE_IO( "Word write %04X => %08X", page, (addr&0xFFF), val&0xFFFF, addr );
nkeynes@10
   298
        io_rgn[(uint32_t)page]->io_write(addr&0xFFF, val);
nkeynes@10
   299
    } else {
nkeynes@400
   300
	xlat_invalidate_word(addr);
nkeynes@10
   301
        *(uint16_t *)(page+(addr&0xFFF)) = val;
nkeynes@10
   302
    }
nkeynes@10
   303
}
nkeynes@10
   304
nkeynes@10
   305
void sh4_write_byte( uint32_t addr, uint32_t val )
nkeynes@10
   306
{
nkeynes@10
   307
    char *page;
nkeynes@10
   308
    
nkeynes@400
   309
    //    fprintf( stderr, "MOV.B %02X => %08X\n", val, addr );
nkeynes@10
   310
    CHECK_WRITE_WATCH(addr,1,val);
nkeynes@10
   311
nkeynes@83
   312
    if( addr >= 0xE0000000 ) {
nkeynes@10
   313
        sh4_write_p4( addr, (int8_t)val );
nkeynes@10
   314
        return;
nkeynes@10
   315
    }
nkeynes@130
   316
    if( (addr&0x1F800000) == 0x04000000 ||
nkeynes@130
   317
	(addr&0x1F800000) == 0x11000000 ) {
nkeynes@150
   318
	texcache_invalidate_page(addr& 0x7FFFFF);
nkeynes@10
   319
        addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);
nkeynes@355
   320
	pvr2_render_buffer_invalidate(addr, TRUE);
nkeynes@165
   321
    } else if( (addr&0x1F800000) == 0x05000000 ) {
nkeynes@355
   322
	pvr2_render_buffer_invalidate(addr, TRUE);
nkeynes@10
   323
    }
nkeynes@10
   324
    
nkeynes@400
   325
    if( (addr&0x1FFFFFFF) < 0x200000 ) {
nkeynes@400
   326
        ERROR( "Attempted write to read-only memory: %08X => %08X", val, addr);
nkeynes@400
   327
        sh4_stop();
nkeynes@400
   328
        return;
nkeynes@400
   329
    }
nkeynes@10
   330
    page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
nkeynes@10
   331
    if( ((uint32_t)page) < MAX_IO_REGIONS ) { /* IO Region */
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   332
        if( page == NULL ) {
nkeynes@10
   333
            ERROR( "Attempted byte write to missing page: %08X", addr );
nkeynes@10
   334
            return;
nkeynes@10
   335
        }
nkeynes@10
   336
        TRACE_IO( "Byte write %02X => %08X", page, (addr&0xFFF), val&0xFF, addr );
nkeynes@10
   337
        io_rgn[(uint32_t)page]->io_write( (addr&0xFFF), val);
nkeynes@10
   338
    } else {
nkeynes@400
   339
	xlat_invalidate_word(addr);
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   340
        *(uint8_t *)(page+(addr&0xFFF)) = val;
nkeynes@10
   341
    }
nkeynes@10
   342
}
nkeynes@10
   343
nkeynes@10
   344
nkeynes@10
   345
nkeynes@10
   346
/* FIXME: Handle all the many special cases when the range doesn't fall cleanly
nkeynes@400
   347
 * into the same memory block
nkeynes@10
   348
 */
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   349
void mem_copy_from_sh4( char *dest, uint32_t srcaddr, size_t count ) {
nkeynes@103
   350
    if( srcaddr >= 0x04000000 && srcaddr < 0x05000000 ) {
nkeynes@103
   351
	pvr2_vram64_read( dest, srcaddr, count );
nkeynes@103
   352
    } else {
nkeynes@103
   353
	char *src = mem_get_region(srcaddr);
nkeynes@103
   354
	if( src == NULL ) {
nkeynes@103
   355
	    ERROR( "Attempted block read from unknown address %08X", srcaddr );
nkeynes@103
   356
	} else {
nkeynes@103
   357
	    memcpy( dest, src, count );
nkeynes@103
   358
	}
nkeynes@103
   359
    }
nkeynes@10
   360
}
nkeynes@10
   361
nkeynes@10
   362
void mem_copy_to_sh4( uint32_t destaddr, char *src, size_t count ) {
nkeynes@325
   363
    int region;
nkeynes@325
   364
nkeynes@325
   365
    if( destaddr >= 0x10000000 && destaddr < 0x14000000 ) {
nkeynes@325
   366
	pvr2_dma_write( destaddr, src, count );
nkeynes@325
   367
	return;
nkeynes@325
   368
    } else if( (destaddr & 0x1F800000) == 0x05000000 ) {
nkeynes@355
   369
	pvr2_render_buffer_invalidate( destaddr, TRUE );
nkeynes@325
   370
    } else if( (destaddr & 0x1F800000) == 0x04000000 ) {
nkeynes@103
   371
	pvr2_vram64_write( destaddr, src, count );
nkeynes@325
   372
	return;
nkeynes@325
   373
    }
nkeynes@325
   374
    char *dest = mem_get_region(destaddr);
nkeynes@325
   375
    if( dest == NULL )
nkeynes@325
   376
	ERROR( "Attempted block write to unknown address %08X", destaddr );
nkeynes@325
   377
    else {
nkeynes@400
   378
	xlat_invalidate_block( destaddr, count );
nkeynes@325
   379
	memcpy( dest, src, count );
nkeynes@90
   380
    }
nkeynes@10
   381
}
nkeynes@369
   382
nkeynes@369
   383
void sh4_flush_store_queue( uint32_t addr )
nkeynes@369
   384
{
nkeynes@369
   385
    /* Store queue operation */
nkeynes@369
   386
    int queue = (addr&0x20)>>2;
nkeynes@371
   387
    char *src = (char *)&sh4r.store_queue[queue];
nkeynes@369
   388
    uint32_t hi = (MMIO_READ( MMU, (queue == 0 ? QACR0 : QACR1) ) & 0x1C) << 24;
nkeynes@369
   389
    uint32_t target = addr&0x03FFFFE0 | hi;
nkeynes@369
   390
    mem_copy_to_sh4( target, src, 32 );
nkeynes@369
   391
}
.