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dingusppc/machines/machinegossamer.cpp
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/*
DingusPPC - The Experimental PowerPC Macintosh emulator
Copyright (C) 2018-26 The DingusPPC Development Team
(See CREDITS.MD for more details)
(You may also contact divingkxt or powermax2286 on Discord)
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 <cpu/ppc/ppcemu.h>
#include <devices/common/clockgen/athens.h>
#include <devices/common/hwcomponent.h>
#include <devices/common/i2c/i2c.h>
#include <devices/common/i2c/i2cprom.h>
#include <devices/common/machineid.h>
#include <devices/common/scsi/scsihd.h>
#include <devices/deviceregistry.h>
#include <devices/memctrl/mpc106.h>
#include <devices/memctrl/spdram.h>
#include <loguru.hpp>
#include <machines/machine.h>
#include <machines/machinebase.h>
#include <machines/machinefactory.h>
#include <machines/machineproperties.h>
#include <cinttypes>
#include <string>
static const std::vector<PciIrqMap> grackle_irq_map = {
{nullptr , DEV_FUN(0x00,0), }, // Grackle
{"pci_PERCH", DEV_FUN(0x0C,0), IntSrc::PCI_PERCH },
{"pci_A1" , DEV_FUN(0x0D,0), IntSrc::PCI_A },
{"pci_B1" , DEV_FUN(0x0E,0), IntSrc::PCI_B },
{"pci_C1" , DEV_FUN(0x0F,0), IntSrc::PCI_C },
{nullptr , DEV_FUN(0x10,0), }, // Heathrow
{"pci_GPU" , DEV_FUN(0x12,0), IntSrc::PCI_GPU },
};
// Bit definitions for the Gossamer system register at 0xFF000004
enum : uint16_t {
// GRC/MFM_L = 15,
FDC_TYPE_SWIM3 = (1 << 15), // Macintosh style floppy disk controller
FDC_TYPE_MFDC = (0 << 15), // PC style floppy disk controller
// /BurstCAP = 14,
BURST_ROM_FALSE = (1 << 14), // burst ROM not present
BURST_ROM_TRUE = (0 << 14), // burst ROM present
// PCI1PrsntC2_I = 13,
// PCI1PrsntC1_I = 12,
PCI_C_PRSNT_POS = 12, // PRSNT bits for the PCI Slot C
// PCI1PrsntB2_I = 11
// PCI1PrsntB1_I = 10
PCI_B_PRSNT_POS = 10, // PRSNT bits for the PCI Slot B
// PCI1PrsntA2_I = 9,
// PCI1PrsntA1_I = 8,
PCI_A_PRSNT_POS = 8, // PRSNT bits for the PCI Slot A
// PID0 = 7,
// PID1 = 6,
// PID2 = 5,
PCM_PID_POS = 5, // Processor und Cache module ID
PCM_PID_MASK = 0xE0,
// /AIO_DETECT = 4,
AIO_PRSNT_FALSE = (1 << 4), // Whisper/Wings style card in the PERCH slot
AIO_PRSNT_TRUE = (0 << 4), // All-in-one style card in the PERCH slot
// BusSpeed2 = 3,
// BusSpeed1 = 2,
// BusSpeed0 = 1,
BUS_SPEED_POS = 1, // bus speed code, see below
BUS_SPEED_MASK = 0x0E,
// /BOSE_DETECT = 0
BOSE_PRSNT_FALSE = (1 << 0), // Bose Module Detect on the Wings card
BOSE_PRSNT_TRUE = (0 << 0),
};
// Gossamer bus speed frequency codes
enum : uint8_t {
BUS_FREQ_75P00A = 0, // 75.00 MHz
BUS_FREQ_70P00 = 1, // 70.00 MHz
BUS_FREQ_78P75 = 2, // 78.75 MHz
BUS_FREQ_TRI = 3, // clock output tristated
BUS_FREQ_75P00B = 4, // 75.00 MHz
BUS_FREQ_60P00 = 5, // 60.00 MHz
BUS_FREQ_66P82 = 6, // 66.82 MHz
BUS_FREQ_83P00 = 7, // 83.00 MHz
};
// EEPROM ID content for a Whisper personality card.
const uint8_t WhisperID[16] = {
0x0F, 0xAA, 0x55, 0xAA, 0x57, 0x68, 0x69, 0x73, 0x70, 0x65, 0x72, 0x00,
0x00, 0x00, 0x00, 0x02
};
static void setup_ram_slot(std::string name, int i2c_addr, int capacity_megs) {
if (!capacity_megs)
return;
gMachineObj->add_device(name, std::unique_ptr<SpdSdram168>(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);
}
class MachineGossamer : public Machine {
public:
static std::unique_ptr<HWComponent> create_desktop() {
return Machine::create_with_id<MachineGossamer>("pmg3dt");
}
static std::unique_ptr<HWComponent> create_tower() {
return Machine::create_with_id<MachineGossamer>("pmg3twr");
}
int initialize(const std::string &id);
};
int MachineGossamer::initialize(const std::string &id) {
LOG_F(INFO, "Building machine Gossamer...");
// get pointer to the memory controller/PCI host bridge object
MPC106* grackle_obj = dynamic_cast<MPC106*>(gMachineObj->get_comp_by_name("Grackle"));
grackle_obj->set_irq_map(grackle_irq_map);
// configure the Gossamer system register
uint16_t sys_reg = FDC_TYPE_SWIM3 | BURST_ROM_TRUE
| (0x3F << PCI_A_PRSNT_POS) // pull up all PRSNT bits
| (1 << PCM_PID_POS) // CPU/Cache speed ratio = 2:1
| AIO_PRSNT_FALSE // this machine is not All-in-one
| (BUS_FREQ_66P82 << BUS_SPEED_POS) // set bus frequency
| BOSE_PRSNT_FALSE; // this machine does not have Wings with Bose Module
gMachineObj->add_device("MachineID", std::unique_ptr<GossamerID>(new GossamerID(sys_reg)));
grackle_obj->add_mmio_region(
0xFF000000, 4096, dynamic_cast<MMIODevice*>(gMachineObj->get_comp_by_name("MachineID")));
MacIoTwo* macio_obj = dynamic_cast<MacIoTwo*>(gMachineObj->get_comp_by_name("Heathrow"));
// enable factory tests if requested
if (GET_BIN_PROP("emmo") != 0)
macio_obj->set_cpu_id(0xE0); // CPUID0 pulled low
else
macio_obj->set_cpu_id(0xF0); // CPUID0...CPUID3 pulled high
// allocate ROM region
if (!grackle_obj->add_rom_region(0xFFC00000, 0x400000)) {
LOG_F(ERROR, "Could not allocate ROM region!");
return -1;
}
// configure RAM slots
setup_ram_slot("RAM_DIMM_1", 0x57, GET_INT_PROP("rambank1_size"));
setup_ram_slot("RAM_DIMM_2", 0x56, GET_INT_PROP("rambank2_size"));
setup_ram_slot("RAM_DIMM_3", 0x55, GET_INT_PROP("rambank3_size"));
// add pci devices
grackle_obj->pci_register_device(
DEV_FUN(0x10,0), dynamic_cast<PCIDevice*>(gMachineObj->get_comp_by_name("Heathrow")));
// add Athens clock generator device and register it with the I2C host
gMachineObj->add_device("Athens", std::unique_ptr<AthensClocks>(new AthensClocks(0x28)));
I2CBus* i2c_bus = dynamic_cast<I2CBus*>(gMachineObj->get_comp_by_type(HWCompType::I2C_HOST));
i2c_bus->register_device(0x28, dynamic_cast<I2CDevice*>(gMachineObj->get_comp_by_name("Athens")));
// create ID EEPROM for the Whisper personality card and register it with the I2C host
gMachineObj->add_device("Perch", std::unique_ptr<I2CProm>(new I2CProm(0x53, 256)));
I2CProm* perch_id = dynamic_cast<I2CProm*>(gMachineObj->get_comp_by_name("Perch"));
perch_id->fill_memory(0, 256, 0);
perch_id->fill_memory(32, 223, 0xFF);
perch_id->set_memory(0, WhisperID, sizeof(WhisperID));
i2c_bus->register_device(0x53, perch_id);
// configure CPU clocks
uint64_t bus_freq = 66820000ULL;
uint64_t timebase_freq = bus_freq / 4;
// initialize virtual CPU and request MPC750 CPU aka G3
ppc_cpu_init(grackle_obj, PPC_VER::MPC750, false, timebase_freq);
// set CPU PLL ratio to 3.5
ppc_state.spr[SPR::HID1] = 0xE << 28;
return 0;
}
static const PropMap gossamer_desktop_settings = {
{"rambank1_size",
new IntProperty(256, std::vector<uint32_t>({8, 16, 32, 64, 128, 256, 512}))},
{"rambank2_size",
new IntProperty( 0, std::vector<uint32_t>({0, 8, 16, 32, 64, 128, 256, 512}))},
{"rambank3_size",
new IntProperty( 0, std::vector<uint32_t>({0, 8, 16, 32, 64, 128, 256, 512}))},
{"emmo",
new BinProperty(0)},
{"hdd_config",
new StrProperty("Ide0:0")},
{"cdr_config",
new StrProperty("Ide1:0")},
{"pci_GPU",
new StrProperty("AtiRageGT")},
};
static const PropMap gossamer_tower_settings = {
{"rambank1_size",
new IntProperty(256, std::vector<uint32_t>({8, 16, 32, 64, 128, 256, 512}))},
{"rambank2_size",
new IntProperty( 0, std::vector<uint32_t>({0, 8, 16, 32, 64, 128, 256, 512}))},
{"rambank3_size",
new IntProperty( 0, std::vector<uint32_t>({0, 8, 16, 32, 64, 128, 256, 512}))},
{"emmo",
new BinProperty(0)},
{"hdd_config",
new StrProperty("Ide0:0")},
{"cdr_config",
new StrProperty("Ide1:0")},
{"pci_GPU",
new StrProperty("AtiRagePro")},
};
static std::vector<std::string> pmg3_devices = {
"Grackle", "ScreamerSnd", "Heathrow", "AtaHardDisk", "AtapiCdrom"
};
static std::vector<std::string> pmg3twr_devices = {
"Grackle", "ScreamerSnd", "Heathrow", "AtaHardDisk", "AtapiCdrom"
};
static const DeviceDescription MachineGossamerDesktop_descriptor = {
MachineGossamer::create_desktop, pmg3_devices, gossamer_desktop_settings
};
static const DeviceDescription MachineGossamerTower_descriptor = {
MachineGossamer::create_tower, pmg3twr_devices, gossamer_tower_settings
};
REGISTER_DEVICE(MachineGossamerDesktop, MachineGossamerDesktop_descriptor);
REGISTER_DEVICE(MachineGossamerTower, MachineGossamerTower_descriptor);
static const MachineDescription pmg3dt_descriptor = {
.name = "pmg3dt",
.description = "Power Macintosh G3 (Beige) Desktop",
.machine_root = "MachineGossamerDesktop",
};
static const MachineDescription pmg3twr_descriptor = {
.name = "pmg3twr",
.description = "Power Macintosh G3 (Beige) Tower",
.machine_root = "MachineGossamerTower",
};
REGISTER_MACHINE(pmg3dt, pmg3dt_descriptor);
REGISTER_MACHINE(pmg3twr, pmg3twr_descriptor);
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