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/* |
/* |
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* Copyright (C) 2006 Anders Gavare. All rights reserved. |
* Copyright (C) 2006-2007 Anders Gavare. All rights reserved. |
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* |
* |
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* Redistribution and use in source and binary forms, with or without |
* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are met: |
* modification, are permitted provided that the following conditions are met: |
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* SUCH DAMAGE. |
* SUCH DAMAGE. |
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* |
* |
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* |
* |
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* $Id: machine_dreamcast.c,v 1.3 2006/07/25 21:49:14 debug Exp $ |
* $Id: machine_dreamcast.c,v 1.30 2007/01/28 16:59:06 debug Exp $ |
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* |
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* Dreamcast. |
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*/ |
*/ |
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#include <stdio.h> |
#include <stdio.h> |
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MACHINE_SETUP(dreamcast) |
MACHINE_SETUP(dreamcast) |
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{ |
{ |
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machine->machine_name = "Dreamcast"; |
machine->machine_name = "Dreamcast"; |
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machine->stable = 1; |
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if (machine->emulated_hz == 0) |
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machine->emulated_hz = 200000000; |
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/* 50 MHz SH4 PCLOCK: */ |
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machine->cpus[0]->cd.sh.pclock = 50000000; |
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if (!machine->use_x11) |
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fprintf(stderr, "-------------------------------------" |
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"------------------------------------------\n" |
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"\n WARNING! You are emulating a Dreamcast without -X." |
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"\n You will miss graphical output!\n\n" |
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"-------------------------------------" |
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"------------------------------------------\n"); |
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/* |
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* Physical address layout on the Dreamcast, according to a |
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* combination of sources: NetBSD sources, KalistOS sources, |
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* http://www.boob.co.uk/docs/Dreamcast_memory.txt, and |
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* http://www.ludd.luth.se/~jlo/dc/memory.txt, and possibly some |
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* others: |
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* |
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* 0x00000000 - 0x001fffff Boot ROM (2 MB) |
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* 0x00200000 - 0x003fffff Flash (256 KB) |
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* 0x005f6800 - ... G2 DMA registers |
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* 0x005f6900 - ... ASIC registers |
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* 0x005f6c00 - ... Maple registers (controller ports) |
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* 0x005f7000 - ... GDROM registers |
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* 0x005f7400 - ... ??? |
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* 0x005f74e4 - ... GDROM re-enable disabled drive (?) |
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* 0x005f7800 - ... G2 External DMA registers |
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* 0x005f7c00 - ... ??? |
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* 0x005f8000 - 0x005f9fff PVR registers (graphics) |
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* 0x00600400 - 0x0060047f LAN Adapter (MB86967) registers |
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* 0x00700000 - ... SPU registers (sound) |
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* 0x00702c00 - Cable select and AICA (?) (*3) |
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* 0x00710000 - 0x00710007 RTC registers |
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* 0x00800000 - 0x009fffff Sound RAM (2 MB) |
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* 0x01000000 - ... Parallel port registers |
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* 0x02000000 - ... CD-ROM port registers |
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* 0x04000000 - 0x047fffff Video RAM (*) |
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* 0x05000000 - 0x057fffff Video RAM (8 MB) |
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* 0x0c000000 - 0x0cffffff RAM (16 MB) |
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* 0x0e000000 - 0x0effffff Copy of RAM? (*2) |
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* 0x10000000 - ... Tile accelerator command area |
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* 0x10800000 - ... Write-only mirror of Video RAM (?) |
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* 0x11000000 - ... PVR DMA area?? |
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* 0x14000000 - ... G2 (?) Or Modem/Extension port? |
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* |
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* (*) = with banks 0 and 1 switched; 64-bit read/write access... |
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* (*3) = See VOUTC in Linux' drivers/video/pvr2fb.c. |
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*/ |
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dev_ram_init(machine, 0x00702c00, 4, DEV_RAM_RAM, 0); |
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/* Sound RAM: */ |
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dev_ram_init(machine, 0x00800000, 2 * 1048576, DEV_RAM_RAM, 0); |
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/* |
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* HACK! TODO: Remove this device at 0x00a00000 once NetBSD has |
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* been fixed to not clear 6 MB beyound the sound RAM area. |
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*/ |
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dev_ram_init(machine, 0x00a00000, 6 * 1048576, DEV_RAM_RAM, 0); |
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dev_ram_init(machine, 0x0c000000, 16 * 1048576, DEV_RAM_RAM, 0x0); |
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/* The "luftvarg" 4KB intro uses memory at paddr 0x0ef00000... */ |
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/* (*2) (TODO: Make this a _mirror_ of 0x0c000000?) */ |
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dev_ram_init(machine, 0x0e000000, 16 * 1048576, DEV_RAM_RAM, 0); |
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device_add(machine, "pvr"); |
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/* device_add(machine, "mb8696x addr=0x600400 addr_mult=4"); */ |
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device_add(machine, "dreamcast_asic"); |
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device_add(machine, "dreamcast_g2"); |
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device_add(machine, "dreamcast_gdrom"); |
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device_add(machine, "dreamcast_maple"); |
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device_add(machine, "dreamcast_rtc"); |
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if (!machine->prom_emulation) |
if (!machine->prom_emulation) |
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return; |
return; |
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/* NetBSD/dreamcast specific register contents: */ |
dreamcast_machine_setup(machine); |
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/* TODO */ |
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} |
} |
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MACHINE_DEFAULT_CPU(dreamcast) |
MACHINE_DEFAULT_CPU(dreamcast) |
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{ |
{ |
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/* Hitachi SH4, 200 MHz */ |
/* Hitachi SH4, 200 MHz */ |
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machine->cpu_name = strdup("SH4"); |
machine->cpu_name = strdup("SH7750"); |
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} |
} |
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MACHINE_DEFAULT_RAM(dreamcast) |
MACHINE_DEFAULT_RAM(dreamcast) |
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{ |
{ |
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machine->physical_ram_in_mb = 16; |
/* Note: This is the size of the boot ROM area, since the |
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Dreamcast's RAM isn't located at physical address zero. */ |
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machine->physical_ram_in_mb = 2; |
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} |
} |
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