dingusppc/machines/machinegossamer.cpp

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/*
DingusPPC - The Experimental PowerPC Macintosh emulator
Copyright (C) 2018-20 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/>.
*/
/** @file Constructs the Gossamer machine.
Author: Max Poliakovski
*/
#include <thirdparty/loguru/loguru.hpp>
#include "machinebase.h"
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#include "cpu/ppc/ppcemu.h"
#include "devices/mpc106.h"
#include "devices/machineid.h"
#include "devices/macio.h"
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#include "devices/viacuda.h"
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#include "devices/spdram.h"
static void setup_ram_slot(std::string name, int i2c_addr, int capacity_megs)
{
if (!capacity_megs)
return;
gMachineObj->add_component(name, new SpdSdram168(i2c_addr));
SpdSdram168 *ram_dimm = dynamic_cast<SpdSdram168 *>(gMachineObj->get_comp_by_name(name));
ram_dimm->set_capacity(capacity_megs);
/* register RAM DIMM with the I2C bus */
I2CBus *i2c_bus = dynamic_cast<I2CBus *>(gMachineObj->get_comp_by_type(HWCompType::I2C_HOST));
i2c_bus->register_device(i2c_addr, ram_dimm);
}
int create_gossamer()
{
if (gMachineObj) {
LOG_F(ERROR, "Global machine object not empty!");
return -1;
}
LOG_F(INFO, "Initializing the Gossamer hardware...");
/* initialize the global machine object */
gMachineObj.reset(new MachineBase("Gossamer"));
/* register MPC106 aka Grackle as memory controller and PCI host */
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gMachineObj->add_component("Grackle", new MPC106);
gMachineObj->add_alias("Grackle", "PCI_Host");
/* get raw pointer to MPC106 object */
MPC106 *grackle_obj = dynamic_cast<MPC106 *>(gMachineObj->get_comp_by_name("Grackle"));
/* add the machine ID register */
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gMachineObj->add_component("MachineID", new GossamerID(0x3d8c));
grackle_obj->add_mmio_region(0xFF000004, 4096,
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dynamic_cast<MMIODevice *>(gMachineObj->get_comp_by_name("MachineID")));
/* add the Heathrow I/O controller */
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gMachineObj->add_component("Heathrow", new HeathrowIC);
grackle_obj->pci_register_device(16,
dynamic_cast<PCIDevice *>(gMachineObj->get_comp_by_name("Heathrow")));
/* allocate ROM region */
if (!grackle_obj->add_rom_region(0xFFC00000, 0x400000)) {
LOG_F(ERROR, "Could not allocate ROM region!\n");
return -1;
}
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/* configure RAM slots */
setup_ram_slot("RAM_DIMM_1", 0x57, 64); /* RAM slot 1 -> 64MB by default */
setup_ram_slot("RAM_DIMM_2", 0x56, 0); /* RAM slot 2 -> empty by default */
setup_ram_slot("RAM_DIMM_3", 0x55, 0); /* RAM slot 3 -> empty by default */
/* Init virtual CPU and request MPC750 CPU aka G3 */
ppc_cpu_init(grackle_obj, PPC_VER::MPC750);
LOG_F(INFO, "Initialization complete.\n");
return 0;
}