nkeynes@953 | 1 | /*`*
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nkeynes@561 | 2 | * $Id$
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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@66 | 22 | #include "aica.h"
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nkeynes@968 | 23 | #include "asic.h"
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nkeynes@811 | 24 | #include "armcore.h"
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nkeynes@7 | 25 |
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nkeynes@953 | 26 | unsigned char aica_main_ram[2 MB];
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nkeynes@953 | 27 | unsigned char aica_scratch_ram[8 KB];
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nkeynes@11 | 28 |
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nkeynes@953 | 29 | /*************** ARM memory access function blocks **************/
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nkeynes@953 | 30 |
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nkeynes@953 | 31 | static int32_t FASTCALL ext_audioram_read_long( sh4addr_t addr )
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nkeynes@953 | 32 | {
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nkeynes@953 | 33 | return *((int32_t *)(aica_main_ram + (addr&0x001FFFFF)));
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nkeynes@953 | 34 | }
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nkeynes@953 | 35 | static int32_t FASTCALL ext_audioram_read_word( sh4addr_t addr )
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nkeynes@953 | 36 | {
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nkeynes@953 | 37 | return SIGNEXT16(*((int16_t *)(aica_main_ram + (addr&0x001FFFFF))));
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nkeynes@953 | 38 | }
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nkeynes@953 | 39 | static int32_t FASTCALL ext_audioram_read_byte( sh4addr_t addr )
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nkeynes@953 | 40 | {
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nkeynes@953 | 41 | return SIGNEXT8(*((int16_t *)(aica_main_ram + (addr&0x001FFFFF))));
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nkeynes@953 | 42 | }
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nkeynes@953 | 43 | static void FASTCALL ext_audioram_write_long( sh4addr_t addr, uint32_t val )
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nkeynes@953 | 44 | {
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nkeynes@953 | 45 | *(uint32_t *)(aica_main_ram + (addr&0x001FFFFF)) = val;
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nkeynes@953 | 46 | asic_g2_write_word();
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nkeynes@953 | 47 | }
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nkeynes@953 | 48 | static void FASTCALL ext_audioram_write_word( sh4addr_t addr, uint32_t val )
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nkeynes@953 | 49 | {
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nkeynes@953 | 50 | *(uint16_t *)(aica_main_ram + (addr&0x001FFFFF)) = (uint16_t)val;
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nkeynes@953 | 51 | asic_g2_write_word();
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nkeynes@953 | 52 | }
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nkeynes@953 | 53 | static void FASTCALL ext_audioram_write_byte( sh4addr_t addr, uint32_t val )
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nkeynes@953 | 54 | {
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nkeynes@953 | 55 | *(uint8_t *)(aica_main_ram + (addr&0x001FFFFF)) = (uint8_t)val;
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nkeynes@953 | 56 | asic_g2_write_word();
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nkeynes@953 | 57 | }
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nkeynes@953 | 58 | static void FASTCALL ext_audioram_read_burst( unsigned char *dest, sh4addr_t addr )
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nkeynes@953 | 59 | {
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nkeynes@953 | 60 | memcpy( dest, aica_main_ram+(addr&0x001FFFFF), 32 );
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nkeynes@953 | 61 | }
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nkeynes@953 | 62 | static void FASTCALL ext_audioram_write_burst( sh4addr_t addr, unsigned char *src )
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nkeynes@953 | 63 | {
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nkeynes@953 | 64 | memcpy( aica_main_ram+(addr&0x001FFFFF), src, 32 );
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nkeynes@7 | 65 | }
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nkeynes@7 | 66 |
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nkeynes@953 | 67 | struct mem_region_fn mem_region_audioram = { ext_audioram_read_long, ext_audioram_write_long,
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nkeynes@953 | 68 | ext_audioram_read_word, ext_audioram_write_word,
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nkeynes@953 | 69 | ext_audioram_read_byte, ext_audioram_write_byte,
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nkeynes@953 | 70 | ext_audioram_read_burst, ext_audioram_write_burst };
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nkeynes@953 | 71 |
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nkeynes@953 | 72 |
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nkeynes@953 | 73 | static int32_t FASTCALL ext_audioscratch_read_long( sh4addr_t addr )
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nkeynes@953 | 74 | {
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nkeynes@953 | 75 | return *((int32_t *)(aica_scratch_ram + (addr&0x00001FFF)));
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nkeynes@953 | 76 | }
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nkeynes@953 | 77 | static int32_t FASTCALL ext_audioscratch_read_word( sh4addr_t addr )
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nkeynes@953 | 78 | {
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nkeynes@953 | 79 | return SIGNEXT16(*((int16_t *)(aica_scratch_ram + (addr&0x00001FFF))));
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nkeynes@953 | 80 | }
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nkeynes@953 | 81 | static int32_t FASTCALL ext_audioscratch_read_byte( sh4addr_t addr )
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nkeynes@953 | 82 | {
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nkeynes@953 | 83 | return SIGNEXT8(*((int16_t *)(aica_scratch_ram + (addr&0x00001FFF))));
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nkeynes@953 | 84 | }
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nkeynes@953 | 85 | static void FASTCALL ext_audioscratch_write_long( sh4addr_t addr, uint32_t val )
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nkeynes@953 | 86 | {
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nkeynes@953 | 87 | *(uint32_t *)(aica_scratch_ram + (addr&0x00001FFF)) = val;
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nkeynes@953 | 88 | asic_g2_write_word();
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nkeynes@953 | 89 | }
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nkeynes@953 | 90 | static void FASTCALL ext_audioscratch_write_word( sh4addr_t addr, uint32_t val )
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nkeynes@953 | 91 | {
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nkeynes@953 | 92 | *(uint16_t *)(aica_scratch_ram + (addr&0x00001FFF)) = (uint16_t)val;
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nkeynes@953 | 93 | asic_g2_write_word();
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nkeynes@953 | 94 | }
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nkeynes@953 | 95 | static void FASTCALL ext_audioscratch_write_byte( sh4addr_t addr, uint32_t val )
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nkeynes@953 | 96 | {
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nkeynes@953 | 97 | *(uint8_t *)(aica_scratch_ram + (addr&0x00001FFF)) = (uint8_t)val;
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nkeynes@953 | 98 | asic_g2_write_word();
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nkeynes@953 | 99 | }
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nkeynes@953 | 100 | static void FASTCALL ext_audioscratch_read_burst( unsigned char *dest, sh4addr_t addr )
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nkeynes@953 | 101 | {
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nkeynes@953 | 102 | memcpy( dest, aica_scratch_ram+(addr&0x00001FFF), 32 );
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nkeynes@953 | 103 | }
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nkeynes@953 | 104 | static void FASTCALL ext_audioscratch_write_burst( sh4addr_t addr, unsigned char *src )
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nkeynes@953 | 105 | {
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nkeynes@953 | 106 | memcpy( aica_scratch_ram+(addr&0x00001FFF), src, 32 );
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nkeynes@953 | 107 | }
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nkeynes@953 | 108 |
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nkeynes@953 | 109 | struct mem_region_fn mem_region_audioscratch = { ext_audioscratch_read_long, ext_audioscratch_write_long,
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nkeynes@953 | 110 | ext_audioscratch_read_word, ext_audioscratch_write_word,
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nkeynes@953 | 111 | ext_audioscratch_read_byte, ext_audioscratch_write_byte,
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nkeynes@953 | 112 | ext_audioscratch_read_burst, ext_audioscratch_write_burst };
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nkeynes@953 | 113 |
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nkeynes@953 | 114 | /************************** Local ARM support **************************/
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nkeynes@14 | 115 | int arm_has_page( uint32_t addr ) {
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nkeynes@14 | 116 | return ( addr < 0x00200000 ||
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nkeynes@736 | 117 | (addr >= 0x00800000 && addr <= 0x00805000 ) );
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nkeynes@14 | 118 | }
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nkeynes@14 | 119 |
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nkeynes@37 | 120 | uint32_t arm_read_long( uint32_t addr ) {
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nkeynes@11 | 121 | if( addr < 0x00200000 ) {
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nkeynes@953 | 122 | return *(int32_t *)(aica_main_ram + addr);
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nkeynes@736 | 123 | /* Main sound ram */
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nkeynes@11 | 124 | } else {
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nkeynes@736 | 125 | uint32_t val;
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nkeynes@736 | 126 | switch( addr & 0xFFFFF000 ) {
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nkeynes@736 | 127 | case 0x00800000:
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nkeynes@736 | 128 | val = mmio_region_AICA0_read(addr&0x0FFF);
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nkeynes@736 | 129 | // DEBUG( "ARM long read from %08X => %08X", addr, val );
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nkeynes@736 | 130 | return val;
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nkeynes@736 | 131 | case 0x00801000:
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nkeynes@736 | 132 | val = mmio_region_AICA1_read(addr&0x0FFF);
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nkeynes@736 | 133 | // DEBUG( "ARM long read from %08X => %08X", addr, val );
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nkeynes@736 | 134 | return val;
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nkeynes@736 | 135 | case 0x00802000:
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nkeynes@736 | 136 | val = mmio_region_AICA2_read(addr&0x0FFF);
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nkeynes@736 | 137 | // DEBUG( "ARM long read from %08X => %08X", addr, val );
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nkeynes@736 | 138 | return val;
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nkeynes@736 | 139 | case 0x00803000:
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nkeynes@736 | 140 | case 0x00804000:
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nkeynes@953 | 141 | return *(int32_t *)(aica_scratch_ram + addr - 0x00803000);
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nkeynes@736 | 142 | }
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nkeynes@11 | 143 | }
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nkeynes@811 | 144 | ERROR( "Attempted long read to undefined page: %08X at %08X",
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nkeynes@811 | 145 | addr, armr.r[15] );
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nkeynes@37 | 146 | /* Undefined memory */
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nkeynes@37 | 147 | return 0;
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nkeynes@7 | 148 | }
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nkeynes@7 | 149 |
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nkeynes@37 | 150 | uint32_t arm_read_word( uint32_t addr ) {
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nkeynes@40 | 151 | return (uint32_t)(uint16_t)arm_read_long( addr );
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nkeynes@7 | 152 | }
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nkeynes@7 | 153 |
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nkeynes@37 | 154 | uint32_t arm_read_byte( uint32_t addr ) {
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nkeynes@40 | 155 | return (uint32_t)(uint8_t)arm_read_long( addr );
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nkeynes@7 | 156 | }
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nkeynes@7 | 157 |
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nkeynes@37 | 158 | void arm_write_long( uint32_t addr, uint32_t value )
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nkeynes@37 | 159 | {
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nkeynes@37 | 160 | if( addr < 0x00200000 ) {
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nkeynes@736 | 161 | /* Main sound ram */
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nkeynes@953 | 162 | *(uint32_t *)(aica_main_ram + addr) = value;
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nkeynes@37 | 163 | } else {
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nkeynes@736 | 164 | switch( addr & 0xFFFFF000 ) {
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nkeynes@736 | 165 | case 0x00800000:
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nkeynes@736 | 166 | // DEBUG( "ARM long write to %08X <= %08X", addr, value );
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nkeynes@736 | 167 | mmio_region_AICA0_write(addr&0x0FFF, value);
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nkeynes@736 | 168 | break;
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nkeynes@736 | 169 | case 0x00801000:
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nkeynes@736 | 170 | // DEBUG( "ARM long write to %08X <= %08X", addr, value );
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nkeynes@736 | 171 | mmio_region_AICA1_write(addr&0x0FFF, value);
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nkeynes@736 | 172 | break;
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nkeynes@736 | 173 | case 0x00802000:
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nkeynes@736 | 174 | // DEBUG( "ARM long write to %08X <= %08X", addr, value );
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nkeynes@736 | 175 | mmio_region_AICA2_write(addr&0x0FFF, value);
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nkeynes@736 | 176 | break;
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nkeynes@736 | 177 | case 0x00803000:
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nkeynes@736 | 178 | case 0x00804000:
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nkeynes@953 | 179 | *(uint32_t *)(aica_scratch_ram + addr - 0x00803000) = value;
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nkeynes@736 | 180 | break;
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nkeynes@736 | 181 | default:
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nkeynes@736 | 182 | ERROR( "Attempted long write to undefined address: %08X",
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nkeynes@736 | 183 | addr );
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nkeynes@736 | 184 | /* Undefined memory */
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nkeynes@736 | 185 | }
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nkeynes@37 | 186 | }
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nkeynes@431 | 187 | return;
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nkeynes@37 | 188 | }
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nkeynes@37 | 189 |
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nkeynes@66 | 190 | uint32_t arm_combine_byte( uint32_t addr, uint32_t val, uint8_t byte )
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nkeynes@66 | 191 | {
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nkeynes@66 | 192 | switch( addr & 0x03 ) {
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nkeynes@66 | 193 | case 0:
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nkeynes@736 | 194 | return (val & 0xFFFFFF00) | byte;
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nkeynes@66 | 195 | case 1:
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nkeynes@736 | 196 | return (val & 0xFFFF00FF) | (byte<<8);
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nkeynes@66 | 197 | case 2:
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nkeynes@736 | 198 | return (val & 0xFF00FFFF) | (byte<<16);
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nkeynes@66 | 199 | case 3:
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nkeynes@736 | 200 | return (val & 0x00FFFFFF) | (byte<<24);
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nkeynes@431 | 201 | default:
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nkeynes@736 | 202 | return val; // Can't happen, but make gcc happy
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nkeynes@66 | 203 | }
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nkeynes@66 | 204 | }
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nkeynes@811 | 205 | void arm_write_word( uint32_t addr, uint32_t value )
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nkeynes@811 | 206 | {
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nkeynes@811 | 207 | if( addr < 0x00200000 ) {
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nkeynes@953 | 208 | *(uint16_t *)(aica_main_ram + addr) = (uint16_t)value;
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nkeynes@811 | 209 | } else {
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nkeynes@811 | 210 |
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nkeynes@811 | 211 | }
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nkeynes@811 | 212 | }
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nkeynes@37 | 213 | void arm_write_byte( uint32_t addr, uint32_t value )
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nkeynes@37 | 214 | {
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nkeynes@37 | 215 | if( addr < 0x00200000 ) {
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nkeynes@736 | 216 | /* Main sound ram */
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nkeynes@953 | 217 | *(uint8_t *)(aica_main_ram + addr) = (uint8_t)value;
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nkeynes@37 | 218 | } else {
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nkeynes@736 | 219 | uint32_t tmp;
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nkeynes@736 | 220 | switch( addr & 0xFFFFF000 ) {
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nkeynes@736 | 221 | case 0x00800000:
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nkeynes@736 | 222 | tmp = MMIO_READ( AICA0, addr & 0x0FFC );
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nkeynes@736 | 223 | value = arm_combine_byte( addr, tmp, value );
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nkeynes@736 | 224 | mmio_region_AICA0_write(addr&0x0FFC, value);
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nkeynes@736 | 225 | break;
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nkeynes@736 | 226 | case 0x00801000:
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nkeynes@736 | 227 | tmp = MMIO_READ( AICA1, addr & 0x0FFC );
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nkeynes@736 | 228 | value = arm_combine_byte( addr, tmp, value );
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nkeynes@736 | 229 | mmio_region_AICA1_write(addr&0x0FFC, value);
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nkeynes@736 | 230 | break;
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nkeynes@736 | 231 | case 0x00802000:
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nkeynes@736 | 232 | tmp = MMIO_READ( AICA2, addr & 0x0FFC );
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nkeynes@736 | 233 | value = arm_combine_byte( addr, tmp, value );
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nkeynes@736 | 234 | mmio_region_AICA2_write(addr&0x0FFC, value);
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nkeynes@736 | 235 | break;
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nkeynes@736 | 236 | case 0x00803000:
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nkeynes@736 | 237 | case 0x00804000:
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nkeynes@953 | 238 | *(uint8_t *)(aica_scratch_ram + addr - 0x00803000) = (uint8_t)value;
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nkeynes@736 | 239 | break;
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nkeynes@736 | 240 | default:
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nkeynes@736 | 241 | ERROR( "Attempted byte write to undefined address: %08X",
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nkeynes@736 | 242 | addr );
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nkeynes@736 | 243 | /* Undefined memory */
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nkeynes@736 | 244 | }
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nkeynes@37 | 245 | }
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nkeynes@431 | 246 | return;
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nkeynes@37 | 247 | }
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nkeynes@37 | 248 |
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nkeynes@37 | 249 | /* User translations - TODO */
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nkeynes@37 | 250 |
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nkeynes@11 | 251 | uint32_t arm_read_long_user( uint32_t addr ) {
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nkeynes@37 | 252 | return arm_read_long( addr );
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nkeynes@11 | 253 | }
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nkeynes@11 | 254 |
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nkeynes@11 | 255 | uint32_t arm_read_byte_user( uint32_t addr ) {
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nkeynes@37 | 256 | return arm_read_byte( addr );
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nkeynes@37 | 257 | }
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nkeynes@11 | 258 |
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nkeynes@37 | 259 | void arm_write_long_user( uint32_t addr, uint32_t val ) {
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nkeynes@37 | 260 | arm_write_long( addr, val );
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nkeynes@11 | 261 | }
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nkeynes@37 | 262 |
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nkeynes@37 | 263 | void arm_write_byte_user( uint32_t addr, uint32_t val )
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nkeynes@37 | 264 | {
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nkeynes@37 | 265 | arm_write_byte( addr, val );
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nkeynes@37 | 266 | }
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