| nkeynes@31 | 1 | /**
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| nkeynes@37 | 2 | * $Id: armmem.c,v 1.5 2005-12-26 06:38:51 nkeynes Exp $
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| nkeynes@31 | 3 | *
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| nkeynes@31 | 4 | * Implements the ARM's memory map.
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| nkeynes@31 | 5 | *
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| nkeynes@31 | 6 | * Copyright (c) 2005 Nathan Keynes.
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| nkeynes@31 | 7 | *
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| nkeynes@31 | 8 | * This program is free software; you can redistribute it and/or modify
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| nkeynes@31 | 9 | * it under the terms of the GNU General Public License as published by
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| nkeynes@31 | 10 | * the Free Software Foundation; either version 2 of the License, or
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| nkeynes@31 | 11 | * (at your option) any later version.
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| nkeynes@31 | 12 | *
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| nkeynes@31 | 13 | * This program is distributed in the hope that it will be useful,
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| nkeynes@31 | 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| nkeynes@31 | 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| nkeynes@31 | 16 | * GNU General Public License for more details.
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| nkeynes@31 | 17 | */
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| nkeynes@31 | 18 |
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| nkeynes@11 | 19 | #include <stdlib.h>
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| nkeynes@11 | 20 | #include "dream.h"
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| nkeynes@7 | 21 | #include "mem.h"
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| nkeynes@7 | 22 |
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| nkeynes@11 | 23 | char *arm_mem = NULL;
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| nkeynes@11 | 24 |
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| nkeynes@7 | 25 | void arm_mem_init() {
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| nkeynes@11 | 26 | arm_mem = mem_get_region_by_name( MEM_REGION_AUDIO );
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| nkeynes@11 | 27 |
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| nkeynes@7 | 28 | }
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| nkeynes@7 | 29 |
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| nkeynes@14 | 30 | int arm_has_page( uint32_t addr ) {
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| nkeynes@14 | 31 | return ( addr < 0x00200000 ||
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| nkeynes@14 | 32 | (addr >= 0x00800000 && addr <= 0x00805000 ) );
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| nkeynes@14 | 33 | }
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| nkeynes@14 | 34 |
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| nkeynes@37 | 35 | uint32_t arm_read_long( uint32_t addr ) {
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| nkeynes@11 | 36 | if( addr < 0x00200000 ) {
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| nkeynes@11 | 37 | return *(int32_t *)(arm_mem + addr);
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| nkeynes@11 | 38 | /* Main sound ram */
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| nkeynes@11 | 39 | } else {
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| nkeynes@37 | 40 | switch( addr & 0xFFFFF000 ) {
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| nkeynes@37 | 41 | case 0x00800000:
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| nkeynes@37 | 42 | return mmio_region_AICA0_read(addr);
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| nkeynes@37 | 43 | break;
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| nkeynes@37 | 44 | case 0x00801000:
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| nkeynes@37 | 45 | return mmio_region_AICA1_read(addr);
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| nkeynes@37 | 46 | break;
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| nkeynes@37 | 47 | case 0x00802000:
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| nkeynes@37 | 48 | return mmio_region_AICA2_read(addr);
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| nkeynes@37 | 49 | break;
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| nkeynes@37 | 50 | case 0x00803000:
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| nkeynes@37 | 51 | break;
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| nkeynes@37 | 52 | case 0x00804000:
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| nkeynes@37 | 53 | break;
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| nkeynes@37 | 54 | }
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| nkeynes@11 | 55 | }
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| nkeynes@37 | 56 | ERROR( "Attempted long read to undefined page: %08X",
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| nkeynes@37 | 57 | addr );
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| nkeynes@37 | 58 | /* Undefined memory */
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| nkeynes@37 | 59 | return 0;
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| nkeynes@7 | 60 | }
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| nkeynes@7 | 61 |
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| nkeynes@37 | 62 | uint32_t arm_read_word( uint32_t addr ) {
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| nkeynes@11 | 63 | if( addr < 0x00200000 ) {
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| nkeynes@11 | 64 | return *(int16_t *)(arm_mem + addr);
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| nkeynes@11 | 65 | /* Main sound ram */
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| nkeynes@11 | 66 | } else {
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| nkeynes@11 | 67 | /* Undefined memory */
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| nkeynes@11 | 68 | ERROR( "Attempted word read to undefined page: %08X",
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| nkeynes@11 | 69 | addr );
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| nkeynes@11 | 70 | return 0;
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| nkeynes@11 | 71 | }
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| nkeynes@11 | 72 |
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| nkeynes@7 | 73 | }
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| nkeynes@7 | 74 |
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| nkeynes@37 | 75 | uint32_t arm_read_byte( uint32_t addr ) {
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| nkeynes@11 | 76 | if( addr < 0x00200000 ) {
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| nkeynes@37 | 77 | return (uint32_t)(*(uint8_t *)(arm_mem + addr));
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| nkeynes@11 | 78 | /* Main sound ram */
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| nkeynes@11 | 79 | } else {
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| nkeynes@11 | 80 | /* Undefined memory */
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| nkeynes@11 | 81 | ERROR( "Attempted byte read to undefined page: %08X",
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| nkeynes@11 | 82 | addr );
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| nkeynes@11 | 83 | return 0;
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| nkeynes@11 | 84 | }
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| nkeynes@7 | 85 | }
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| nkeynes@7 | 86 |
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| nkeynes@37 | 87 | void arm_write_long( uint32_t addr, uint32_t value )
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| nkeynes@37 | 88 | {
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| nkeynes@37 | 89 | if( addr < 0x00200000 ) {
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| nkeynes@37 | 90 | *(uint32_t *)(arm_mem + addr) = value;
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| nkeynes@37 | 91 | } else {
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| nkeynes@37 | 92 | }
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| nkeynes@37 | 93 | }
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| nkeynes@37 | 94 |
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| nkeynes@37 | 95 | void arm_write_byte( uint32_t addr, uint32_t value )
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| nkeynes@37 | 96 | {
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| nkeynes@37 | 97 | if( addr < 0x00200000 ) {
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| nkeynes@37 | 98 | *(uint8_t *)(arm_mem+addr) = (uint8_t)value;
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| nkeynes@37 | 99 | } else {
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| nkeynes@37 | 100 | }
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| nkeynes@37 | 101 | }
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| nkeynes@37 | 102 |
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| nkeynes@37 | 103 | /* User translations - TODO */
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| nkeynes@37 | 104 |
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| nkeynes@11 | 105 | uint32_t arm_read_long_user( uint32_t addr ) {
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| nkeynes@37 | 106 | return arm_read_long( addr );
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| nkeynes@11 | 107 | }
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| nkeynes@11 | 108 |
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| nkeynes@11 | 109 | uint32_t arm_read_byte_user( uint32_t addr ) {
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| nkeynes@37 | 110 | return arm_read_byte( addr );
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| nkeynes@37 | 111 | }
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| nkeynes@11 | 112 |
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| nkeynes@37 | 113 | void arm_write_long_user( uint32_t addr, uint32_t val ) {
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| nkeynes@37 | 114 | arm_write_long( addr, val );
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| nkeynes@11 | 115 | }
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| nkeynes@37 | 116 |
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| nkeynes@37 | 117 | void arm_write_byte_user( uint32_t addr, uint32_t val )
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| nkeynes@37 | 118 | {
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| nkeynes@37 | 119 | arm_write_byte( addr, val );
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| nkeynes@37 | 120 | }
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lxdream 0.9.1