nkeynes@10 | 1 | /**
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nkeynes@90 | 2 | * $Id: sh4mem.c,v 1.6 2006-01-22 22:42:53 nkeynes Exp $
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nkeynes@10 | 3 | * sh4mem.c is responsible for the SH4's access to memory (including memory
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nkeynes@10 | 4 | * mapped I/O), using the page maps created in mem.c
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nkeynes@10 | 5 | *
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nkeynes@10 | 6 | * Copyright (c) 2005 Nathan Keynes.
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nkeynes@10 | 7 | *
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nkeynes@10 | 8 | * This program is free software; you can redistribute it and/or modify
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nkeynes@10 | 9 | * it under the terms of the GNU General Public License as published by
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nkeynes@10 | 10 | * the Free Software Foundation; either version 2 of the License, or
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nkeynes@10 | 11 | * (at your option) any later version.
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nkeynes@10 | 12 | *
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nkeynes@10 | 13 | * This program is distributed in the hope that it will be useful,
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nkeynes@10 | 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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nkeynes@10 | 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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nkeynes@10 | 16 | * GNU General Public License for more details.
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nkeynes@10 | 17 | */
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nkeynes@10 | 18 |
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nkeynes@35 | 19 | #define MODULE sh4_module
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nkeynes@35 | 20 |
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nkeynes@10 | 21 | #include <string.h>
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nkeynes@10 | 22 | #include <zlib.h>
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nkeynes@10 | 23 | #include "dream.h"
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nkeynes@10 | 24 | #include "mem.h"
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nkeynes@10 | 25 | #include "mmio.h"
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nkeynes@70 | 26 | #include "sh4core.h"
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nkeynes@10 | 27 | #include "sh4mmio.h"
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nkeynes@10 | 28 | #include "dreamcast.h"
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nkeynes@10 | 29 |
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nkeynes@10 | 30 | #define OC_BASE 0x1C000000
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nkeynes@10 | 31 | #define OC_TOP 0x20000000
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nkeynes@10 | 32 |
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nkeynes@90 | 33 | #define TRANSLATE_VIDEO_64BIT_ADDRESS(a) ( (((a)&0x00FFFFF8)>>1)|(((a)&0x00000004)<<20)|((a)&0x03)|0x05000000 )
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nkeynes@10 | 34 |
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nkeynes@10 | 35 | #ifdef ENABLE_WATCH
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nkeynes@10 | 36 | #define CHECK_READ_WATCH( addr, size ) \
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nkeynes@10 | 37 | if( mem_is_watched(addr,size,WATCH_READ) != NULL ) { \
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nkeynes@10 | 38 | WARN( "Watch triggered at %08X by %d byte read", addr, size ); \
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nkeynes@10 | 39 | dreamcast_stop(); \
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nkeynes@10 | 40 | }
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nkeynes@10 | 41 | #define CHECK_WRITE_WATCH( addr, size, val ) \
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nkeynes@10 | 42 | if( mem_is_watched(addr,size,WATCH_WRITE) != NULL ) { \
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nkeynes@10 | 43 | WARN( "Watch triggered at %08X by %d byte write <= %0*X", addr, size, size*2, val ); \
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nkeynes@10 | 44 | dreamcast_stop(); \
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nkeynes@10 | 45 | }
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nkeynes@10 | 46 | #else
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nkeynes@10 | 47 | #define CHECK_READ_WATCH( addr, size )
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nkeynes@10 | 48 | #define CHECK_WRITE_WATCH( addr, size )
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nkeynes@10 | 49 | #endif
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nkeynes@10 | 50 |
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nkeynes@10 | 51 | #define TRACE_IO( str, p, r, ... ) if(io_rgn[(uint32_t)p]->trace_flag) \
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nkeynes@10 | 52 | TRACE( str " [%s.%s: %s]", __VA_ARGS__, \
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nkeynes@10 | 53 | MMIO_NAME_BYNUM((uint32_t)p), MMIO_REGID_BYNUM((uint32_t)p, r), \
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nkeynes@10 | 54 | MMIO_REGDESC_BYNUM((uint32_t)p, r) )
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nkeynes@10 | 55 |
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nkeynes@10 | 56 | extern struct mem_region mem_rgn[];
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nkeynes@10 | 57 | extern struct mmio_region *P4_io[];
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nkeynes@10 | 58 |
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nkeynes@10 | 59 | int32_t sh4_read_p4( uint32_t addr )
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nkeynes@10 | 60 | {
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nkeynes@10 | 61 | struct mmio_region *io = P4_io[(addr&0x1FFFFFFF)>>19];
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nkeynes@10 | 62 | if( !io ) {
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nkeynes@10 | 63 | ERROR( "Attempted read from unknown P4 region: %08X", addr );
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nkeynes@10 | 64 | return 0;
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nkeynes@10 | 65 | } else {
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nkeynes@10 | 66 | return io->io_read( addr&0xFFF );
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nkeynes@10 | 67 | }
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nkeynes@10 | 68 | }
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nkeynes@10 | 69 |
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nkeynes@10 | 70 | void sh4_write_p4( uint32_t addr, int32_t val )
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nkeynes@10 | 71 | {
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nkeynes@10 | 72 | struct mmio_region *io = P4_io[(addr&0x1FFFFFFF)>>19];
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nkeynes@10 | 73 | if( !io ) {
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nkeynes@10 | 74 | if( (addr & 0xFC000000) == 0xE0000000 ) {
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nkeynes@10 | 75 | /* Store queue */
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nkeynes@10 | 76 | SH4_WRITE_STORE_QUEUE( addr, val );
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nkeynes@38 | 77 | } else if( (addr & 0xFF000000) != 0xF4000000 ) {
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nkeynes@38 | 78 | /* OC address cache isn't implemented, but don't complain about it.
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nkeynes@38 | 79 | * Complain about anything else though */
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nkeynes@10 | 80 | ERROR( "Attempted write to unknown P4 region: %08X", addr );
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nkeynes@10 | 81 | }
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nkeynes@10 | 82 | } else {
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nkeynes@10 | 83 | io->io_write( addr&0xFFF, val );
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nkeynes@10 | 84 | }
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nkeynes@10 | 85 | }
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nkeynes@10 | 86 |
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nkeynes@10 | 87 | int32_t sh4_read_phys_word( uint32_t addr )
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nkeynes@10 | 88 | {
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nkeynes@10 | 89 | char *page;
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nkeynes@83 | 90 | if( addr >= 0xE0000000 ) /* P4 Area, handled specially */
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nkeynes@10 | 91 | return SIGNEXT16(sh4_read_p4( addr ));
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nkeynes@10 | 92 |
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nkeynes@10 | 93 | if( (addr&0x1F800000) == 0x04000000 ) {
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nkeynes@10 | 94 | addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);
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nkeynes@10 | 95 | }
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nkeynes@10 | 96 |
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nkeynes@10 | 97 | page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
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nkeynes@10 | 98 | if( ((uint32_t)page) < MAX_IO_REGIONS ) { /* IO Region */
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nkeynes@10 | 99 | if( page == NULL ) {
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nkeynes@10 | 100 | ERROR( "Attempted word read to missing page: %08X",
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nkeynes@10 | 101 | addr );
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nkeynes@10 | 102 | return 0;
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nkeynes@10 | 103 | }
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nkeynes@10 | 104 | return SIGNEXT16(io_rgn[(uint32_t)page]->io_read(addr&0xFFF));
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nkeynes@10 | 105 | } else {
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nkeynes@10 | 106 | return SIGNEXT16(*(int16_t *)(page+(addr&0xFFF)));
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nkeynes@10 | 107 | }
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nkeynes@10 | 108 | }
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nkeynes@10 | 109 |
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nkeynes@10 | 110 | int32_t sh4_read_long( uint32_t addr )
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nkeynes@10 | 111 | {
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nkeynes@10 | 112 | char *page;
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nkeynes@10 | 113 |
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nkeynes@10 | 114 | CHECK_READ_WATCH(addr,4);
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nkeynes@10 | 115 |
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nkeynes@83 | 116 | if( addr >= 0xE0000000 ) /* P4 Area, handled specially */
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nkeynes@10 | 117 | return sh4_read_p4( addr );
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nkeynes@10 | 118 |
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nkeynes@10 | 119 | if( (addr&0x1F800000) == 0x04000000 ) {
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nkeynes@10 | 120 | addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);
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nkeynes@10 | 121 | }
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nkeynes@10 | 122 |
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nkeynes@10 | 123 | if( IS_MMU_ENABLED() ) {
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nkeynes@10 | 124 | ERROR( "user-mode & mmu translation not implemented, aborting", NULL );
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nkeynes@10 | 125 | sh4_stop();
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nkeynes@10 | 126 | return 0;
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nkeynes@10 | 127 | }
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nkeynes@10 | 128 |
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nkeynes@10 | 129 | page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
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nkeynes@10 | 130 | if( ((uint32_t)page) < MAX_IO_REGIONS ) { /* IO Region */
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nkeynes@10 | 131 | int32_t val;
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nkeynes@10 | 132 | if( page == NULL ) {
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nkeynes@10 | 133 | ERROR( "Attempted long read to missing page: %08X", addr );
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nkeynes@10 | 134 | return 0;
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nkeynes@10 | 135 | }
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nkeynes@10 | 136 | val = io_rgn[(uint32_t)page]->io_read(addr&0xFFF);
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nkeynes@10 | 137 | TRACE_IO( "Long read %08X <= %08X", page, (addr&0xFFF), val, addr );
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nkeynes@10 | 138 | return val;
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nkeynes@10 | 139 | } else {
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nkeynes@10 | 140 | return *(int32_t *)(page+(addr&0xFFF));
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nkeynes@10 | 141 | }
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nkeynes@10 | 142 | }
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nkeynes@10 | 143 |
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nkeynes@10 | 144 | int32_t sh4_read_word( uint32_t addr )
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nkeynes@10 | 145 | {
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nkeynes@10 | 146 | char *page;
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nkeynes@10 | 147 |
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nkeynes@10 | 148 | CHECK_READ_WATCH(addr,2);
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nkeynes@10 | 149 |
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nkeynes@83 | 150 | if( addr >= 0xE0000000 ) /* P4 Area, handled specially */
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nkeynes@10 | 151 | return SIGNEXT16(sh4_read_p4( addr ));
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nkeynes@10 | 152 |
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nkeynes@10 | 153 | if( (addr&0x1F800000) == 0x04000000 ) {
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nkeynes@10 | 154 | addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);
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nkeynes@10 | 155 | }
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nkeynes@10 | 156 |
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nkeynes@10 | 157 | if( IS_MMU_ENABLED() ) {
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nkeynes@10 | 158 | ERROR( "user-mode & mmu translation not implemented, aborting", NULL );
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nkeynes@10 | 159 | sh4_stop();
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nkeynes@10 | 160 | return 0;
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nkeynes@10 | 161 | }
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nkeynes@10 | 162 |
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nkeynes@10 | 163 | page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
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nkeynes@10 | 164 | if( ((uint32_t)page) < MAX_IO_REGIONS ) { /* IO Region */
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nkeynes@10 | 165 | int32_t val;
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nkeynes@10 | 166 | if( page == NULL ) {
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nkeynes@10 | 167 | ERROR( "Attempted word read to missing page: %08X", addr );
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nkeynes@10 | 168 | return 0;
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nkeynes@10 | 169 | }
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nkeynes@10 | 170 | val = SIGNEXT16(io_rgn[(uint32_t)page]->io_read(addr&0xFFF));
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nkeynes@10 | 171 | TRACE_IO( "Word read %04X <= %08X", page, (addr&0xFFF), val&0xFFFF, addr );
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nkeynes@10 | 172 | return val;
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nkeynes@10 | 173 | } else {
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nkeynes@10 | 174 | return SIGNEXT16(*(int16_t *)(page+(addr&0xFFF)));
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nkeynes@10 | 175 | }
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nkeynes@10 | 176 | }
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nkeynes@10 | 177 |
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nkeynes@10 | 178 | int32_t sh4_read_byte( uint32_t addr )
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nkeynes@10 | 179 | {
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nkeynes@10 | 180 | char *page;
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nkeynes@10 | 181 |
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nkeynes@10 | 182 | CHECK_READ_WATCH(addr,1);
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nkeynes@10 | 183 |
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nkeynes@83 | 184 | if( addr >= 0xE0000000 ) /* P4 Area, handled specially */
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nkeynes@10 | 185 | return SIGNEXT8(sh4_read_p4( addr ));
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nkeynes@10 | 186 | if( (addr&0x1F800000) == 0x04000000 ) {
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nkeynes@10 | 187 | addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);
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nkeynes@10 | 188 | }
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nkeynes@10 | 189 |
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nkeynes@10 | 190 | if( IS_MMU_ENABLED() ) {
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nkeynes@10 | 191 | ERROR( "user-mode & mmu translation not implemented, aborting", NULL );
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nkeynes@10 | 192 | sh4_stop();
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nkeynes@10 | 193 | return 0;
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nkeynes@10 | 194 | }
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nkeynes@10 | 195 |
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nkeynes@10 | 196 | page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
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nkeynes@10 | 197 | if( ((uint32_t)page) < MAX_IO_REGIONS ) { /* IO Region */
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nkeynes@10 | 198 | int32_t val;
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nkeynes@10 | 199 | if( page == NULL ) {
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nkeynes@10 | 200 | ERROR( "Attempted byte read to missing page: %08X", addr );
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nkeynes@10 | 201 | return 0;
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nkeynes@10 | 202 | }
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nkeynes@10 | 203 | val = SIGNEXT8(io_rgn[(uint32_t)page]->io_read(addr&0xFFF));
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nkeynes@10 | 204 | TRACE_IO( "Byte read %02X <= %08X", page, (addr&0xFFF), val&0xFF, addr );
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nkeynes@10 | 205 | return val;
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nkeynes@10 | 206 | } else {
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nkeynes@10 | 207 | return SIGNEXT8(*(int8_t *)(page+(addr&0xFFF)));
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nkeynes@10 | 208 | }
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nkeynes@10 | 209 | }
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nkeynes@10 | 210 |
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nkeynes@10 | 211 | void sh4_write_long( uint32_t addr, uint32_t val )
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nkeynes@10 | 212 | {
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nkeynes@10 | 213 | char *page;
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nkeynes@10 | 214 |
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nkeynes@10 | 215 | CHECK_WRITE_WATCH(addr,4,val);
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nkeynes@10 | 216 |
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nkeynes@83 | 217 | if( addr >= 0xE0000000 ) {
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nkeynes@10 | 218 | sh4_write_p4( addr, val );
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nkeynes@10 | 219 | return;
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nkeynes@10 | 220 | }
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nkeynes@10 | 221 | if( (addr&0x1F800000) == 0x04000000 ) {
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nkeynes@10 | 222 | addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);
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nkeynes@10 | 223 | }
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nkeynes@10 | 224 |
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nkeynes@10 | 225 | if( IS_MMU_ENABLED() ) {
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nkeynes@10 | 226 | ERROR( "user-mode & mmu translation not implemented, aborting", NULL );
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nkeynes@10 | 227 | sh4_stop();
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nkeynes@10 | 228 | return;
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nkeynes@10 | 229 | }
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nkeynes@10 | 230 | if( (addr&0x1FFFFFFF) < 0x200000 ) {
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nkeynes@10 | 231 | ERROR( "Attempted write to read-only memory: %08X => %08X", val, addr);
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nkeynes@10 | 232 | sh4_stop();
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nkeynes@10 | 233 | return;
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nkeynes@10 | 234 | }
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nkeynes@10 | 235 | page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
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nkeynes@10 | 236 | if( ((uint32_t)page) < MAX_IO_REGIONS ) { /* IO Region */
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nkeynes@10 | 237 | if( page == NULL ) {
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nkeynes@10 | 238 | ERROR( "Long write to missing page: %08X => %08X", val, addr );
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nkeynes@10 | 239 | return;
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nkeynes@10 | 240 | }
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nkeynes@10 | 241 | TRACE_IO( "Long write %08X => %08X", page, (addr&0xFFF), val, addr );
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nkeynes@10 | 242 | io_rgn[(uint32_t)page]->io_write(addr&0xFFF, val);
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nkeynes@10 | 243 | } else {
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nkeynes@10 | 244 | *(uint32_t *)(page+(addr&0xFFF)) = val;
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nkeynes@10 | 245 | }
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nkeynes@10 | 246 | }
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nkeynes@10 | 247 |
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nkeynes@10 | 248 | void sh4_write_word( uint32_t addr, uint32_t val )
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nkeynes@10 | 249 | {
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nkeynes@10 | 250 | char *page;
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nkeynes@10 | 251 |
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nkeynes@10 | 252 | CHECK_WRITE_WATCH(addr,2,val);
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nkeynes@10 | 253 |
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nkeynes@83 | 254 | if( addr >= 0xE0000000 ) {
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nkeynes@10 | 255 | sh4_write_p4( addr, (int16_t)val );
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nkeynes@10 | 256 | return;
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nkeynes@10 | 257 | }
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nkeynes@10 | 258 | if( (addr&0x1F800000) == 0x04000000 ) {
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nkeynes@10 | 259 | addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);
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nkeynes@10 | 260 | }
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nkeynes@10 | 261 | if( IS_MMU_ENABLED() ) {
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nkeynes@10 | 262 | ERROR( "user-mode & mmu translation not implemented, aborting", NULL );
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nkeynes@10 | 263 | sh4_stop();
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nkeynes@10 | 264 | return;
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nkeynes@10 | 265 | }
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nkeynes@10 | 266 | page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
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nkeynes@10 | 267 | if( ((uint32_t)page) < MAX_IO_REGIONS ) { /* IO Region */
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nkeynes@10 | 268 | if( page == NULL ) {
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nkeynes@10 | 269 | ERROR( "Attempted word write to missing page: %08X", addr );
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nkeynes@10 | 270 | return;
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nkeynes@10 | 271 | }
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nkeynes@10 | 272 | TRACE_IO( "Word write %04X => %08X", page, (addr&0xFFF), val&0xFFFF, addr );
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nkeynes@10 | 273 | io_rgn[(uint32_t)page]->io_write(addr&0xFFF, val);
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nkeynes@10 | 274 | } else {
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nkeynes@10 | 275 | *(uint16_t *)(page+(addr&0xFFF)) = val;
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nkeynes@10 | 276 | }
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nkeynes@10 | 277 | }
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nkeynes@10 | 278 |
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nkeynes@10 | 279 | void sh4_write_byte( uint32_t addr, uint32_t val )
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nkeynes@10 | 280 | {
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nkeynes@10 | 281 | char *page;
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nkeynes@10 | 282 |
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nkeynes@10 | 283 | CHECK_WRITE_WATCH(addr,1,val);
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nkeynes@10 | 284 |
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nkeynes@83 | 285 | if( addr >= 0xE0000000 ) {
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nkeynes@10 | 286 | sh4_write_p4( addr, (int8_t)val );
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nkeynes@10 | 287 | return;
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nkeynes@10 | 288 | }
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nkeynes@10 | 289 | if( (addr&0x1F800000) == 0x04000000 ) {
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nkeynes@10 | 290 | addr = TRANSLATE_VIDEO_64BIT_ADDRESS(addr);
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nkeynes@10 | 291 | }
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nkeynes@10 | 292 |
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nkeynes@10 | 293 | if( IS_MMU_ENABLED() ) {
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nkeynes@10 | 294 | ERROR( "user-mode & mmu translation not implemented, aborting", NULL );
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nkeynes@10 | 295 | sh4_stop();
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nkeynes@10 | 296 | return;
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nkeynes@10 | 297 | }
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nkeynes@10 | 298 | page = page_map[ (addr & 0x1FFFFFFF) >> 12 ];
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nkeynes@10 | 299 | if( ((uint32_t)page) < MAX_IO_REGIONS ) { /* IO Region */
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nkeynes@10 | 300 | if( page == NULL ) {
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nkeynes@10 | 301 | ERROR( "Attempted byte write to missing page: %08X", addr );
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nkeynes@10 | 302 | return;
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nkeynes@10 | 303 | }
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nkeynes@10 | 304 | TRACE_IO( "Byte write %02X => %08X", page, (addr&0xFFF), val&0xFF, addr );
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nkeynes@10 | 305 | io_rgn[(uint32_t)page]->io_write( (addr&0xFFF), val);
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nkeynes@10 | 306 | } else {
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nkeynes@10 | 307 | *(uint8_t *)(page+(addr&0xFFF)) = val;
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nkeynes@10 | 308 | }
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nkeynes@10 | 309 | }
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nkeynes@10 | 310 |
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nkeynes@10 | 311 |
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nkeynes@10 | 312 |
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nkeynes@10 | 313 | /* FIXME: Handle all the many special cases when the range doesn't fall cleanly
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nkeynes@10 | 314 | * into the same memory black
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nkeynes@10 | 315 | */
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nkeynes@10 | 316 | void mem_copy_from_sh4( char *dest, uint32_t srcaddr, size_t count ) {
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nkeynes@10 | 317 | char *src = mem_get_region(srcaddr);
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nkeynes@10 | 318 | memcpy( dest, src, count );
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nkeynes@10 | 319 | }
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nkeynes@10 | 320 |
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nkeynes@10 | 321 | void mem_copy_to_sh4( uint32_t destaddr, char *src, size_t count ) {
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nkeynes@90 | 322 | if( destaddr >= 0x10000000 && destaddr < 0x20000000 ) {
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nkeynes@90 | 323 | pvr2ta_write( src, count );
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nkeynes@90 | 324 | } else if( destaddr >= 04000000 && destaddr < 0x5000000 ) {
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nkeynes@90 | 325 | /* 64-bit video write. Oh. Yuck */
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nkeynes@90 | 326 | uint32_t *dest32[2];
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nkeynes@90 | 327 | uint32_t *src32 = (uint32_t *)src;
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nkeynes@90 | 328 | int flag = 0;
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nkeynes@90 | 329 | if( destaddr & 0x03 != 0 ) {
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nkeynes@90 | 330 | }
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nkeynes@90 | 331 | dest32[0] = (uint32_t *)mem_get_region(TRANSLATE_VIDEO_64BIT_ADDRESS(destaddr));
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nkeynes@90 | 332 | dest32[1] = (uint32_t *)mem_get_region(TRANSLATE_VIDEO_64BIT_ADDRESS(destaddr+4));
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nkeynes@90 | 333 | while( count >= 4 ) {
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nkeynes@90 | 334 | *dest32[flag]++ = *src32++;
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nkeynes@90 | 335 | flag = !flag;
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nkeynes@90 | 336 | count -=4;
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nkeynes@90 | 337 | }
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nkeynes@90 | 338 | if( count != 0 ) {
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nkeynes@90 | 339 | src = (char *)src32;
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nkeynes@90 | 340 | char *dest = dest32[flag];
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nkeynes@90 | 341 | do {
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nkeynes@90 | 342 | *dest++ = *src++;
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nkeynes@90 | 343 | count--;
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nkeynes@90 | 344 | } while( count > 0 );
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nkeynes@90 | 345 | }
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nkeynes@90 | 346 | } else {
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nkeynes@90 | 347 | char *dest = mem_get_region(destaddr);
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nkeynes@90 | 348 | if( dest == NULL )
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nkeynes@90 | 349 | ERROR( "Attempted block write to undefined region %08X", destaddr );
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nkeynes@90 | 350 | else
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nkeynes@90 | 351 | memcpy( dest, src, count );
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nkeynes@90 | 352 | }
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nkeynes@10 | 353 | }
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