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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 448:3e5f0c52f0ec
prev430:467519b050f4
next502:c4ecae2b1b5e
author nkeynes
date Tue Oct 16 12:36:59 2007 +0000 (13 years ago)
permissions -rw-r--r--
last change Downgrade the errors to warnings - they're more whinges than anything fatal
file annotate diff log raw
nkeynes@10
     1
/**
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 * $Id: sh4mem.c,v 1.29 2007-10-16 12:36:59 nkeynes Exp $
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 * sh4mem.c is responsible for the SH4's access to memory (including memory
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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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 */
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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 "dreamcast.h"
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#include "sh4/sh4core.h"
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#include "sh4/sh4mmio.h"
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#include "sh4/xltcache.h"
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#include "pvr2/pvr2.h"
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#include "asic.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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        dreamcast_stop(); \
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    43
    }
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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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        dreamcast_stop(); \
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    48
    }
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#else
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#define CHECK_READ_WATCH( addr, size )
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#define CHECK_WRITE_WATCH( addr, size, val )
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#endif
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#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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char *sh4_main_ram;
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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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            WARN( "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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}
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void sh4_write_p4( uint32_t addr, int32_t val )
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    90
{
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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 & 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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            WARN( "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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   104
    }
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}
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int32_t sh4_read_phys_word( uint32_t addr )
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{
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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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   112
    
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    if( (addr&0x1F800000) == 0x04000000 ) {
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        addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);
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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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   119
        if( page == NULL ) {
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            WARN( "Attempted word read to missing page: %08X",
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   121
                   addr );
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            return 0;
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   123
        }
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        return SIGNEXT16(io_rgn[(uint32_t)page]->io_read(addr&0xFFF));
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    } else {
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        return SIGNEXT16(*(int16_t *)(page+(addr&0xFFF)));
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   127
    }
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}
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int32_t sh4_read_long( uint32_t addr )
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{
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    char *page;
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    CHECK_READ_WATCH(addr,4);
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   136
    if( addr >= 0xE0000000 ) { /* P4 Area, handled specially */
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        return sh4_read_p4( addr );
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   138
    } else if( (addr&0x1C000000) == 0x0C000000 ) {
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   139
	return *(int32_t *)(sh4_main_ram + (addr&0x00FFFFFF));
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   140
    } else if( (addr&0x1F800000) == 0x04000000 ) {
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        addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);
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   142
	pvr2_render_buffer_invalidate(addr, FALSE);
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   143
    } 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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   149
        int32_t val;
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   150
        if( page == NULL ) {
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            WARN( "Attempted long read to missing page: %08X", addr );
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   152
            return 0;
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   153
        }
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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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   157
    } else {
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        return *(int32_t *)(page+(addr&0xFFF));
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   159
    }
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   160
}
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   162
int32_t sh4_read_word( uint32_t addr )
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{
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   164
    char *page;
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   165
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    CHECK_READ_WATCH(addr,2);
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   168
    if( addr >= 0xE0000000 ) { /* P4 Area, handled specially */
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        return SIGNEXT16(sh4_read_p4( addr ));
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   170
    } else if( (addr&0x1C000000) == 0x0C000000 ) {
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	return SIGNEXT16(*(int16_t *)(sh4_main_ram + (addr&0x00FFFFFF)));
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   172
    } else 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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   182
        if( page == NULL ) {
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	    WARN( "Attempted word read to missing page: %08X", addr );
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            return 0;
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        }
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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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}
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int32_t sh4_read_byte( uint32_t addr )
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{
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    char *page;
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   197
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   198
    CHECK_READ_WATCH(addr,1);
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nkeynes@418
   200
    if( addr >= 0xE0000000 ) { /* P4 Area, handled specially */
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        return SIGNEXT8(sh4_read_p4( addr ));
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   202
    } else if( (addr&0x1C000000) == 0x0C000000 ) {
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   203
	return SIGNEXT8(*(int8_t *)(sh4_main_ram + (addr&0x00FFFFFF)));
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   204
    } else if( (addr&0x1F800000) == 0x04000000 ) {
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   205
        addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);
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    	pvr2_render_buffer_invalidate(addr, FALSE);
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   207
    } else if( (addr&0x1F800000) == 0x05000000 ) {
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	pvr2_render_buffer_invalidate(addr, FALSE);
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    }
nkeynes@217
   210
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   211
    
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    page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
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   213
    if( ((uint32_t)page) < MAX_IO_REGIONS ) { /* IO Region */
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        int32_t val;
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   215
        if( page == NULL ) {
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   216
            WARN( "Attempted byte read to missing page: %08X", addr );
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   217
            return 0;
nkeynes@10
   218
        }
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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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   222
    } else {
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   223
        return SIGNEXT8(*(int8_t *)(page+(addr&0xFFF)));
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   224
    }
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   225
}
nkeynes@10
   226
nkeynes@10
   227
void sh4_write_long( uint32_t addr, uint32_t val )
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{
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   229
    char *page;
nkeynes@400
   230
nkeynes@400
   231
    // fprintf( stderr, "MOV.L %08X => %08X\n", val, addr );
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   232
    CHECK_WRITE_WATCH(addr,4,val);
nkeynes@10
   233
nkeynes@83
   234
    if( addr >= 0xE0000000 ) {
nkeynes@10
   235
        sh4_write_p4( addr, val );
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   236
        return;
nkeynes@418
   237
    } else if( (addr&0x1C000000) == 0x0C000000 ) {
nkeynes@418
   238
	*(uint32_t *)(sh4_main_ram + (addr&0x00FFFFFF)) = val;
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   239
	xlat_invalidate_long(addr);
nkeynes@418
   240
	return;
nkeynes@418
   241
    } else if( (addr&0x1F800000) == 0x04000000 || 
nkeynes@418
   242
	       (addr&0x1F800000) == 0x11000000 ) {
nkeynes@150
   243
	texcache_invalidate_page(addr& 0x7FFFFF);
nkeynes@10
   244
        addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);
nkeynes@355
   245
	pvr2_render_buffer_invalidate(addr, TRUE);
nkeynes@165
   246
    } else if( (addr&0x1F800000) == 0x05000000 ) {
nkeynes@355
   247
	pvr2_render_buffer_invalidate(addr, TRUE);
nkeynes@10
   248
    }
nkeynes@10
   249
nkeynes@10
   250
    if( (addr&0x1FFFFFFF) < 0x200000 ) {
nkeynes@448
   251
        WARN( "Attempted write to read-only memory: %08X => %08X", val, addr);
nkeynes@10
   252
        sh4_stop();
nkeynes@10
   253
        return;
nkeynes@10
   254
    }
nkeynes@137
   255
    if( (addr&0x1F800000) == 0x00800000 )
nkeynes@137
   256
	asic_g2_write_word();
nkeynes@137
   257
nkeynes@10
   258
    page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
nkeynes@10
   259
    if( ((uint32_t)page) < MAX_IO_REGIONS ) { /* IO Region */
nkeynes@10
   260
        if( page == NULL ) {
nkeynes@137
   261
	    if( (addr & 0x1F000000) >= 0x04000000 &&
nkeynes@137
   262
		(addr & 0x1F000000) < 0x07000000 )
nkeynes@137
   263
		return;
nkeynes@448
   264
            WARN( "Long write to missing page: %08X => %08X", val, addr );
nkeynes@10
   265
            return;
nkeynes@10
   266
        }
nkeynes@10
   267
        TRACE_IO( "Long write %08X => %08X", page, (addr&0xFFF), val, addr );
nkeynes@10
   268
        io_rgn[(uint32_t)page]->io_write(addr&0xFFF, val);
nkeynes@10
   269
    } else {
nkeynes@10
   270
        *(uint32_t *)(page+(addr&0xFFF)) = val;
nkeynes@10
   271
    }
nkeynes@10
   272
}
nkeynes@10
   273
nkeynes@10
   274
void sh4_write_word( uint32_t addr, uint32_t val )
nkeynes@10
   275
{
nkeynes@10
   276
    char *page;
nkeynes@10
   277
nkeynes@400
   278
    //    fprintf( stderr, "MOV.W %04X => %08X\n", val, addr );
nkeynes@10
   279
    CHECK_WRITE_WATCH(addr,2,val);
nkeynes@10
   280
nkeynes@83
   281
    if( addr >= 0xE0000000 ) {
nkeynes@10
   282
        sh4_write_p4( addr, (int16_t)val );
nkeynes@10
   283
        return;
nkeynes@418
   284
    } else if( (addr&0x1C000000) == 0x0C000000 ) {
nkeynes@418
   285
	*(uint16_t *)(sh4_main_ram + (addr&0x00FFFFFF)) = val;
nkeynes@419
   286
	xlat_invalidate_word(addr);
nkeynes@418
   287
	return;
nkeynes@418
   288
    } else if( (addr&0x1F800000) == 0x04000000 ||
nkeynes@130
   289
	(addr&0x1F800000) == 0x11000000 ) {
nkeynes@150
   290
	texcache_invalidate_page(addr& 0x7FFFFF);
nkeynes@10
   291
        addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);
nkeynes@355
   292
	pvr2_render_buffer_invalidate(addr, TRUE);
nkeynes@165
   293
    } else if( (addr&0x1F800000) == 0x05000000 ) {
nkeynes@355
   294
	pvr2_render_buffer_invalidate(addr, TRUE);
nkeynes@10
   295
    }
nkeynes@406
   296
nkeynes@400
   297
    if( (addr&0x1FFFFFFF) < 0x200000 ) {
nkeynes@448
   298
        WARN( "Attempted write to read-only memory: %08X => %08X", val, addr);
nkeynes@400
   299
        sh4_stop();
nkeynes@400
   300
        return;
nkeynes@400
   301
    }
nkeynes@10
   302
    page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
nkeynes@10
   303
    if( ((uint32_t)page) < MAX_IO_REGIONS ) { /* IO Region */
nkeynes@10
   304
        if( page == NULL ) {
nkeynes@448
   305
            WARN( "Attempted word write to missing page: %08X", addr );
nkeynes@10
   306
            return;
nkeynes@10
   307
        }
nkeynes@10
   308
        TRACE_IO( "Word write %04X => %08X", page, (addr&0xFFF), val&0xFFFF, addr );
nkeynes@10
   309
        io_rgn[(uint32_t)page]->io_write(addr&0xFFF, val);
nkeynes@10
   310
    } else {
nkeynes@10
   311
        *(uint16_t *)(page+(addr&0xFFF)) = val;
nkeynes@10
   312
    }
nkeynes@10
   313
}
nkeynes@10
   314
nkeynes@10
   315
void sh4_write_byte( uint32_t addr, uint32_t val )
nkeynes@10
   316
{
nkeynes@10
   317
    char *page;
nkeynes@10
   318
    
nkeynes@400
   319
    //    fprintf( stderr, "MOV.B %02X => %08X\n", val, addr );
nkeynes@10
   320
    CHECK_WRITE_WATCH(addr,1,val);
nkeynes@10
   321
nkeynes@83
   322
    if( addr >= 0xE0000000 ) {
nkeynes@10
   323
        sh4_write_p4( addr, (int8_t)val );
nkeynes@10
   324
        return;
nkeynes@418
   325
    } else if( (addr&0x1C000000) == 0x0C000000 ) {
nkeynes@418
   326
	*(uint8_t *)(sh4_main_ram + (addr&0x00FFFFFF)) = val;
nkeynes@419
   327
	xlat_invalidate_word(addr);
nkeynes@418
   328
	return;
nkeynes@418
   329
    } else if( (addr&0x1F800000) == 0x04000000 ||
nkeynes@418
   330
	       (addr&0x1F800000) == 0x11000000 ) {
nkeynes@150
   331
	texcache_invalidate_page(addr& 0x7FFFFF);
nkeynes@10
   332
        addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);
nkeynes@355
   333
	pvr2_render_buffer_invalidate(addr, TRUE);
nkeynes@165
   334
    } else if( (addr&0x1F800000) == 0x05000000 ) {
nkeynes@355
   335
	pvr2_render_buffer_invalidate(addr, TRUE);
nkeynes@10
   336
    }
nkeynes@10
   337
    
nkeynes@400
   338
    if( (addr&0x1FFFFFFF) < 0x200000 ) {
nkeynes@448
   339
        WARN( "Attempted write to read-only memory: %08X => %08X", val, addr);
nkeynes@400
   340
        sh4_stop();
nkeynes@400
   341
        return;
nkeynes@400
   342
    }
nkeynes@10
   343
    page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
nkeynes@10
   344
    if( ((uint32_t)page) < MAX_IO_REGIONS ) { /* IO Region */
nkeynes@10
   345
        if( page == NULL ) {
nkeynes@448
   346
            WARN( "Attempted byte write to missing page: %08X", addr );
nkeynes@10
   347
            return;
nkeynes@10
   348
        }
nkeynes@10
   349
        TRACE_IO( "Byte write %02X => %08X", page, (addr&0xFFF), val&0xFF, addr );
nkeynes@10
   350
        io_rgn[(uint32_t)page]->io_write( (addr&0xFFF), val);
nkeynes@10
   351
    } else {
nkeynes@10
   352
        *(uint8_t *)(page+(addr&0xFFF)) = val;
nkeynes@10
   353
    }
nkeynes@10
   354
}
nkeynes@10
   355
nkeynes@10
   356
nkeynes@10
   357
nkeynes@10
   358
/* FIXME: Handle all the many special cases when the range doesn't fall cleanly
nkeynes@400
   359
 * into the same memory block
nkeynes@10
   360
 */
nkeynes@430
   361
void mem_copy_from_sh4( unsigned char *dest, uint32_t srcaddr, size_t count ) {
nkeynes@103
   362
    if( srcaddr >= 0x04000000 && srcaddr < 0x05000000 ) {
nkeynes@103
   363
	pvr2_vram64_read( dest, srcaddr, count );
nkeynes@103
   364
    } else {
nkeynes@103
   365
	char *src = mem_get_region(srcaddr);
nkeynes@103
   366
	if( src == NULL ) {
nkeynes@448
   367
	    WARN( "Attempted block read from unknown address %08X", srcaddr );
nkeynes@103
   368
	} else {
nkeynes@103
   369
	    memcpy( dest, src, count );
nkeynes@103
   370
	}
nkeynes@103
   371
    }
nkeynes@10
   372
}
nkeynes@10
   373
nkeynes@430
   374
void mem_copy_to_sh4( uint32_t destaddr, unsigned char *src, size_t count ) {
nkeynes@325
   375
    if( destaddr >= 0x10000000 && destaddr < 0x14000000 ) {
nkeynes@325
   376
	pvr2_dma_write( destaddr, src, count );
nkeynes@325
   377
	return;
nkeynes@325
   378
    } else if( (destaddr & 0x1F800000) == 0x05000000 ) {
nkeynes@355
   379
	pvr2_render_buffer_invalidate( destaddr, TRUE );
nkeynes@325
   380
    } else if( (destaddr & 0x1F800000) == 0x04000000 ) {
nkeynes@103
   381
	pvr2_vram64_write( destaddr, src, count );
nkeynes@325
   382
	return;
nkeynes@325
   383
    }
nkeynes@325
   384
    char *dest = mem_get_region(destaddr);
nkeynes@325
   385
    if( dest == NULL )
nkeynes@448
   386
	WARN( "Attempted block write to unknown address %08X", destaddr );
nkeynes@325
   387
    else {
nkeynes@400
   388
	xlat_invalidate_block( destaddr, count );
nkeynes@325
   389
	memcpy( dest, src, count );
nkeynes@90
   390
    }
nkeynes@10
   391
}
nkeynes@369
   392
nkeynes@369
   393
void sh4_flush_store_queue( uint32_t addr )
nkeynes@369
   394
{
nkeynes@369
   395
    /* Store queue operation */
nkeynes@369
   396
    int queue = (addr&0x20)>>2;
nkeynes@430
   397
    unsigned char *src = (unsigned char *)&sh4r.store_queue[queue];
nkeynes@369
   398
    uint32_t hi = (MMIO_READ( MMU, (queue == 0 ? QACR0 : QACR1) ) & 0x1C) << 24;
nkeynes@422
   399
    uint32_t target = (addr&0x03FFFFE0) | hi;
nkeynes@369
   400
    mem_copy_to_sh4( target, src, 32 );
nkeynes@369
   401
}
.