nkeynes@31 | 1 | /**
|
nkeynes@561 | 2 | * $Id$
|
nkeynes@31 | 3 | *
|
nkeynes@31 | 4 | * Implements the ARM's memory map.
|
nkeynes@31 | 5 | *
|
nkeynes@31 | 6 | * Copyright (c) 2005 Nathan Keynes.
|
nkeynes@31 | 7 | *
|
nkeynes@31 | 8 | * This program is free software; you can redistribute it and/or modify
|
nkeynes@31 | 9 | * it under the terms of the GNU General Public License as published by
|
nkeynes@31 | 10 | * the Free Software Foundation; either version 2 of the License, or
|
nkeynes@31 | 11 | * (at your option) any later version.
|
nkeynes@31 | 12 | *
|
nkeynes@31 | 13 | * This program is distributed in the hope that it will be useful,
|
nkeynes@31 | 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
nkeynes@31 | 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
nkeynes@31 | 16 | * GNU General Public License for more details.
|
nkeynes@31 | 17 | */
|
nkeynes@31 | 18 |
|
nkeynes@11 | 19 | #include <stdlib.h>
|
nkeynes@11 | 20 | #include "dream.h"
|
nkeynes@7 | 21 | #include "mem.h"
|
nkeynes@66 | 22 | #include "aica.h"
|
nkeynes@811 | 23 | #include "armcore.h"
|
nkeynes@7 | 24 |
|
nkeynes@502 | 25 | unsigned char *arm_mem = NULL;
|
nkeynes@502 | 26 | unsigned char *arm_mem_scratch = NULL;
|
nkeynes@11 | 27 |
|
nkeynes@7 | 28 | void arm_mem_init() {
|
nkeynes@11 | 29 | arm_mem = mem_get_region_by_name( MEM_REGION_AUDIO );
|
nkeynes@40 | 30 | arm_mem_scratch = mem_get_region_by_name( MEM_REGION_AUDIO_SCRATCH );
|
nkeynes@7 | 31 | }
|
nkeynes@7 | 32 |
|
nkeynes@14 | 33 | int arm_has_page( uint32_t addr ) {
|
nkeynes@14 | 34 | return ( addr < 0x00200000 ||
|
nkeynes@736 | 35 | (addr >= 0x00800000 && addr <= 0x00805000 ) );
|
nkeynes@14 | 36 | }
|
nkeynes@14 | 37 |
|
nkeynes@37 | 38 | uint32_t arm_read_long( uint32_t addr ) {
|
nkeynes@11 | 39 | if( addr < 0x00200000 ) {
|
nkeynes@736 | 40 | return *(int32_t *)(arm_mem + addr);
|
nkeynes@736 | 41 | /* Main sound ram */
|
nkeynes@11 | 42 | } else {
|
nkeynes@736 | 43 | uint32_t val;
|
nkeynes@736 | 44 | switch( addr & 0xFFFFF000 ) {
|
nkeynes@736 | 45 | case 0x00800000:
|
nkeynes@736 | 46 | val = mmio_region_AICA0_read(addr&0x0FFF);
|
nkeynes@736 | 47 | // DEBUG( "ARM long read from %08X => %08X", addr, val );
|
nkeynes@736 | 48 | return val;
|
nkeynes@736 | 49 | case 0x00801000:
|
nkeynes@736 | 50 | val = mmio_region_AICA1_read(addr&0x0FFF);
|
nkeynes@736 | 51 | // DEBUG( "ARM long read from %08X => %08X", addr, val );
|
nkeynes@736 | 52 | return val;
|
nkeynes@736 | 53 | case 0x00802000:
|
nkeynes@736 | 54 | val = mmio_region_AICA2_read(addr&0x0FFF);
|
nkeynes@736 | 55 | // DEBUG( "ARM long read from %08X => %08X", addr, val );
|
nkeynes@736 | 56 | return val;
|
nkeynes@736 | 57 | case 0x00803000:
|
nkeynes@736 | 58 | case 0x00804000:
|
nkeynes@736 | 59 | return *(int32_t *)(arm_mem_scratch + addr - 0x00803000);
|
nkeynes@736 | 60 | }
|
nkeynes@11 | 61 | }
|
nkeynes@811 | 62 | ERROR( "Attempted long read to undefined page: %08X at %08X",
|
nkeynes@811 | 63 | addr, armr.r[15] );
|
nkeynes@37 | 64 | /* Undefined memory */
|
nkeynes@37 | 65 | return 0;
|
nkeynes@7 | 66 | }
|
nkeynes@7 | 67 |
|
nkeynes@37 | 68 | uint32_t arm_read_word( uint32_t addr ) {
|
nkeynes@40 | 69 | return (uint32_t)(uint16_t)arm_read_long( addr );
|
nkeynes@7 | 70 | }
|
nkeynes@7 | 71 |
|
nkeynes@37 | 72 | uint32_t arm_read_byte( uint32_t addr ) {
|
nkeynes@40 | 73 | return (uint32_t)(uint8_t)arm_read_long( addr );
|
nkeynes@7 | 74 | }
|
nkeynes@7 | 75 |
|
nkeynes@37 | 76 | void arm_write_long( uint32_t addr, uint32_t value )
|
nkeynes@37 | 77 | {
|
nkeynes@37 | 78 | if( addr < 0x00200000 ) {
|
nkeynes@736 | 79 | /* Main sound ram */
|
nkeynes@736 | 80 | *(uint32_t *)(arm_mem + addr) = value;
|
nkeynes@37 | 81 | } else {
|
nkeynes@736 | 82 | switch( addr & 0xFFFFF000 ) {
|
nkeynes@736 | 83 | case 0x00800000:
|
nkeynes@736 | 84 | // DEBUG( "ARM long write to %08X <= %08X", addr, value );
|
nkeynes@736 | 85 | mmio_region_AICA0_write(addr&0x0FFF, value);
|
nkeynes@736 | 86 | break;
|
nkeynes@736 | 87 | case 0x00801000:
|
nkeynes@736 | 88 | // DEBUG( "ARM long write to %08X <= %08X", addr, value );
|
nkeynes@736 | 89 | mmio_region_AICA1_write(addr&0x0FFF, value);
|
nkeynes@736 | 90 | break;
|
nkeynes@736 | 91 | case 0x00802000:
|
nkeynes@736 | 92 | // DEBUG( "ARM long write to %08X <= %08X", addr, value );
|
nkeynes@736 | 93 | mmio_region_AICA2_write(addr&0x0FFF, value);
|
nkeynes@736 | 94 | break;
|
nkeynes@736 | 95 | case 0x00803000:
|
nkeynes@736 | 96 | case 0x00804000:
|
nkeynes@736 | 97 | *(uint32_t *)(arm_mem_scratch + addr - 0x00803000) = value;
|
nkeynes@736 | 98 | break;
|
nkeynes@736 | 99 | default:
|
nkeynes@736 | 100 | ERROR( "Attempted long write to undefined address: %08X",
|
nkeynes@736 | 101 | addr );
|
nkeynes@736 | 102 | /* Undefined memory */
|
nkeynes@736 | 103 | }
|
nkeynes@37 | 104 | }
|
nkeynes@431 | 105 | return;
|
nkeynes@37 | 106 | }
|
nkeynes@37 | 107 |
|
nkeynes@66 | 108 | uint32_t arm_combine_byte( uint32_t addr, uint32_t val, uint8_t byte )
|
nkeynes@66 | 109 | {
|
nkeynes@66 | 110 | switch( addr & 0x03 ) {
|
nkeynes@66 | 111 | case 0:
|
nkeynes@736 | 112 | return (val & 0xFFFFFF00) | byte;
|
nkeynes@66 | 113 | case 1:
|
nkeynes@736 | 114 | return (val & 0xFFFF00FF) | (byte<<8);
|
nkeynes@66 | 115 | case 2:
|
nkeynes@736 | 116 | return (val & 0xFF00FFFF) | (byte<<16);
|
nkeynes@66 | 117 | case 3:
|
nkeynes@736 | 118 | return (val & 0x00FFFFFF) | (byte<<24);
|
nkeynes@431 | 119 | default:
|
nkeynes@736 | 120 | return val; // Can't happen, but make gcc happy
|
nkeynes@66 | 121 | }
|
nkeynes@66 | 122 | }
|
nkeynes@811 | 123 | void arm_write_word( uint32_t addr, uint32_t value )
|
nkeynes@811 | 124 | {
|
nkeynes@811 | 125 | if( addr < 0x00200000 ) {
|
nkeynes@811 | 126 | *(uint16_t *)(arm_mem + addr) = (uint16_t)value;
|
nkeynes@811 | 127 | } else {
|
nkeynes@811 | 128 |
|
nkeynes@811 | 129 | }
|
nkeynes@811 | 130 | }
|
nkeynes@37 | 131 | void arm_write_byte( uint32_t addr, uint32_t value )
|
nkeynes@37 | 132 | {
|
nkeynes@37 | 133 | if( addr < 0x00200000 ) {
|
nkeynes@736 | 134 | /* Main sound ram */
|
nkeynes@736 | 135 | *(uint8_t *)(arm_mem + addr) = (uint8_t)value;
|
nkeynes@37 | 136 | } else {
|
nkeynes@736 | 137 | uint32_t tmp;
|
nkeynes@736 | 138 | switch( addr & 0xFFFFF000 ) {
|
nkeynes@736 | 139 | case 0x00800000:
|
nkeynes@736 | 140 | tmp = MMIO_READ( AICA0, addr & 0x0FFC );
|
nkeynes@736 | 141 | value = arm_combine_byte( addr, tmp, value );
|
nkeynes@736 | 142 | mmio_region_AICA0_write(addr&0x0FFC, value);
|
nkeynes@736 | 143 | break;
|
nkeynes@736 | 144 | case 0x00801000:
|
nkeynes@736 | 145 | tmp = MMIO_READ( AICA1, addr & 0x0FFC );
|
nkeynes@736 | 146 | value = arm_combine_byte( addr, tmp, value );
|
nkeynes@736 | 147 | mmio_region_AICA1_write(addr&0x0FFC, value);
|
nkeynes@736 | 148 | break;
|
nkeynes@736 | 149 | case 0x00802000:
|
nkeynes@736 | 150 | tmp = MMIO_READ( AICA2, addr & 0x0FFC );
|
nkeynes@736 | 151 | value = arm_combine_byte( addr, tmp, value );
|
nkeynes@736 | 152 | mmio_region_AICA2_write(addr&0x0FFC, value);
|
nkeynes@736 | 153 | break;
|
nkeynes@736 | 154 | case 0x00803000:
|
nkeynes@736 | 155 | case 0x00804000:
|
nkeynes@736 | 156 | *(uint8_t *)(arm_mem_scratch + addr - 0x00803000) = (uint8_t)value;
|
nkeynes@736 | 157 | break;
|
nkeynes@736 | 158 | default:
|
nkeynes@736 | 159 | ERROR( "Attempted byte write to undefined address: %08X",
|
nkeynes@736 | 160 | addr );
|
nkeynes@736 | 161 | /* Undefined memory */
|
nkeynes@736 | 162 | }
|
nkeynes@37 | 163 | }
|
nkeynes@431 | 164 | return;
|
nkeynes@37 | 165 | }
|
nkeynes@37 | 166 |
|
nkeynes@37 | 167 | /* User translations - TODO */
|
nkeynes@37 | 168 |
|
nkeynes@11 | 169 | uint32_t arm_read_long_user( uint32_t addr ) {
|
nkeynes@37 | 170 | return arm_read_long( addr );
|
nkeynes@11 | 171 | }
|
nkeynes@11 | 172 |
|
nkeynes@11 | 173 | uint32_t arm_read_byte_user( uint32_t addr ) {
|
nkeynes@37 | 174 | return arm_read_byte( addr );
|
nkeynes@37 | 175 | }
|
nkeynes@11 | 176 |
|
nkeynes@37 | 177 | void arm_write_long_user( uint32_t addr, uint32_t val ) {
|
nkeynes@37 | 178 | arm_write_long( addr, val );
|
nkeynes@11 | 179 | }
|
nkeynes@37 | 180 |
|
nkeynes@37 | 181 | void arm_write_byte_user( uint32_t addr, uint32_t val )
|
nkeynes@37 | 182 | {
|
nkeynes@37 | 183 | arm_write_byte( addr, val );
|
nkeynes@37 | 184 | }
|