mirror of
https://github.com/dingusdev/dingusppc.git
synced 2024-12-23 06:29:38 +00:00
136 lines
4.1 KiB
C++
136 lines
4.1 KiB
C++
/*
|
|
DingusPPC - The Experimental PowerPC Macintosh emulator
|
|
Copyright (C) 2018-23 divingkatae and maximum
|
|
(theweirdo) spatium
|
|
|
|
(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
|
|
|
|
This program is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef MACHINE_ID_H
|
|
#define MACHINE_ID_H
|
|
|
|
#include <devices/common/hwcomponent.h>
|
|
#include <devices/common/mmiodevice.h>
|
|
#include <devices/ioctrl/macio.h>
|
|
|
|
#include <cinttypes>
|
|
#include <loguru.hpp>
|
|
#include <string>
|
|
|
|
/**
|
|
@file Contains definitions for Power Macintosh machine ID registers.
|
|
|
|
The machine ID register is a memory-based register containing hardcoded
|
|
values the system software can read to identify machine/board it's running on.
|
|
|
|
Register location and value meaning are board-dependent.
|
|
*/
|
|
|
|
/**
|
|
Machine ID register for Nubus Power Macs.
|
|
It's located at physical address 0x5FFFFFFC and contains four bytes:
|
|
+0 uint16_t signature = 0xA55A
|
|
+1 uint8_t machine_type (3 - Power Mac)
|
|
+2 uint8_t model (0x10 = PDM, 0x12 = Carl Sagan, 0x13 = Cold Fusion)
|
|
*/
|
|
class NubusMacID : public MMIODevice {
|
|
public:
|
|
NubusMacID(const uint16_t id) {
|
|
this->name = "Nubus-Machine-id";
|
|
this->id[0] = 0xA5;
|
|
this->id[1] = 0x5A;
|
|
this->id[2] = (id >> 8) & 0xFF;
|
|
this->id[3] = id & 0xFF;
|
|
supports_types(HWCompType::MMIO_DEV);
|
|
};
|
|
~NubusMacID() = default;
|
|
|
|
uint32_t read(uint32_t rgn_start, uint32_t offset, int size) {
|
|
if (size == 4 && offset == 0) {
|
|
return *(uint32_t*)this->id;
|
|
}
|
|
if (size == 1 && offset < 4) {
|
|
return this->id[offset];
|
|
}
|
|
ABORT_F("NubusMacID: invalid read size %d, offset %d!", size, offset);
|
|
return 0;
|
|
};
|
|
|
|
/* not writable */
|
|
void write(uint32_t rgn_start, uint32_t offset, uint32_t value, int size) {};
|
|
|
|
private:
|
|
uint8_t id[4];
|
|
};
|
|
|
|
/**
|
|
TNT-style machines and derivatives provide two board registers
|
|
telling whether some particular piece of HW is installed or not.
|
|
Both board registers are attached to the IOBus of the I/O controller.
|
|
See machines/machinetnt.cpp for further details.
|
|
**/
|
|
class BoardRegister : public HWComponent, public IobusDevice {
|
|
public:
|
|
BoardRegister(std::string name, const uint16_t data) {
|
|
this->set_name(name);
|
|
supports_types(HWCompType::IOBUS_DEV);
|
|
this->data = data;
|
|
};
|
|
~BoardRegister() = default;
|
|
|
|
uint16_t iodev_read(uint32_t address) {
|
|
return (!address) ? this->data : 0xFFFFU;
|
|
};
|
|
|
|
// appears read-only to guest
|
|
void iodev_write(uint32_t address, uint16_t value) {};
|
|
|
|
void update_bits(const uint16_t val, const uint16_t mask) {
|
|
this->data = (this->data & ~mask) | (val & mask);
|
|
};
|
|
|
|
private:
|
|
uint16_t data;
|
|
};
|
|
|
|
/**
|
|
The machine ID for the Gossamer board is accesible at 0xFF000004 (phys).
|
|
It contains a 16-bit value revealing machine's capabilities like bus speed,
|
|
ROM speed, I/O configuration etc.
|
|
See machines/machinegossamer.cpp for further details.
|
|
*/
|
|
class GossamerID : public MMIODevice {
|
|
public:
|
|
GossamerID(const uint16_t id) {
|
|
this->id = id;
|
|
this->name = "Machine-id";
|
|
supports_types(HWCompType::MMIO_DEV);
|
|
};
|
|
~GossamerID() = default;
|
|
|
|
uint32_t read(uint32_t rgn_start, uint32_t offset, int size) {
|
|
return ((offset == 4 && size == 2) ? this->id : 0);
|
|
};
|
|
|
|
/* not writable */
|
|
void write(uint32_t rgn_start, uint32_t offset, uint32_t value, int size) {};
|
|
|
|
private:
|
|
uint16_t id;
|
|
};
|
|
|
|
#endif // MACHINE_ID_H
|