mirror of
https://github.com/dingusdev/dingusppc.git
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35c86ad6bf
Result of running IWYU (https://include-what-you-use.org/) and applying most of the suggestions about unncessary includes and forward declarations. Was motivated by observing that <thread> was being included in ppcopcodes.cpp even though it was unused (found while researching the use of threads), but seems generally good to help with build times and correctness.
180 lines
7.0 KiB
C++
180 lines
7.0 KiB
C++
/*
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DingusPPC - The Experimental PowerPC Macintosh emulator
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Copyright (C) 2018-22 divingkatae and maximum
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(theweirdo) spatium
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(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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/** @file Constructs the Gossamer machine.
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Author: Max Poliakovski
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*/
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#include <cpu/ppc/ppcemu.h>
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#include <devices/common/hwcomponent.h>
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#include <devices/common/i2c/i2c.h>
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#include <devices/common/i2c/athens.h>
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#include <devices/common/i2c/i2cprom.h>
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#include <devices/common/machineid.h>
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#include <devices/memctrl/mpc106.h>
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#include <devices/memctrl/spdram.h>
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#include <loguru.hpp>
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#include <machines/machinebase.h>
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#include <machines/machinefactory.h>
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#include <machines/machineproperties.h>
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#include <cinttypes>
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#include <string>
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// Bit definitions for the Gossamer system register at 0xFF000004
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enum : uint16_t {
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FDC_TYPE_SWIM3 = (1 << 15), // Macintosh style floppy disk controller
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FDC_TYPE_MFDC = (0 << 15), // PC style floppy disk controller
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BURST_ROM_FALSE = (1 << 14), // burst ROM not present
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BURST_ROM_TRUE = (0 << 14), // burst ROM present
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PCI_C_PRSNT_POS = 12, // PRSNT bits for the PCI Slot C
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PCI_B_PRSNT_POS = 10, // PRSNT bits for the PCI Slot B
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PCI_A_PRSNT_POS = 8, // PRSNT bits for the PCI Slot A
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PCM_PID_POS = 5, // Processor und Cache module ID
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PCM_PID_MASK = 0xE0,
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AIO_PRSNT_FALSE = (1 << 4), // Whisper/Wings style card in the PERCH slot
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AIO_PRSNT_TRUE = (0 << 4), // All-in-one style card in the PERCH slot
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BUS_SPEED_POS = 1, // bus speed code, see below
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BUS_SPEED_MASK = 0x0E,
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UNKNOWN_BIT_0 = 1 // Don't know what this bit is for
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};
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// Gossamer bus speed frequency codes
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enum : uint8_t {
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BUS_FREQ_75P00A = 0, // 75.00 MHz
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BUS_FREQ_70P00 = 1, // 70.00 MHz
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BUS_FREQ_78P75 = 2, // 78.75 MHz
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BUS_FREQ_TRI = 3, // clock output tristated
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BUS_FREQ_75P00B = 4, // 75.00 MHz
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BUS_FREQ_60P00 = 5, // 60.00 MHz
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BUS_FREQ_66P82 = 6, // 66.82 MHz
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BUS_FREQ_83P00 = 7, // 83.00 MHz
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};
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// EEPROM ID content for a Whisper personality card.
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const uint8_t WhisperID[16] = {
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0x0F, 0xAA, 0x55, 0xAA, 0x57, 0x68, 0x69, 0x73, 0x70, 0x65, 0x72, 0x00,
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0x00, 0x00, 0x00, 0x02
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};
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static void setup_ram_slot(std::string name, int i2c_addr, int capacity_megs) {
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if (!capacity_megs)
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return;
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gMachineObj->add_device(name, std::unique_ptr<SpdSdram168>(new SpdSdram168(i2c_addr)));
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SpdSdram168* ram_dimm = dynamic_cast<SpdSdram168*>(gMachineObj->get_comp_by_name(name));
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ram_dimm->set_capacity(capacity_megs);
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// register RAM DIMM with the I2C bus
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I2CBus* i2c_bus = dynamic_cast<I2CBus*>(gMachineObj->get_comp_by_type(HWCompType::I2C_HOST));
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i2c_bus->register_device(i2c_addr, ram_dimm);
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}
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int initialize_gossamer(std::string& id)
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{
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LOG_F(INFO, "Building machine Gossamer...");
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// get pointer to the memory controller/PCI host bridge object
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MPC106* grackle_obj = dynamic_cast<MPC106*>(gMachineObj->get_comp_by_name("Grackle"));
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// configure the Gossamer system register
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uint16_t sys_reg = FDC_TYPE_SWIM3 | BURST_ROM_TRUE
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| (0x3F << PCI_A_PRSNT_POS) // pull up all PRSNT bits
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| (1 << PCM_PID_POS) // CPU/Cache speed ratio = 2:1
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| AIO_PRSNT_FALSE // this machine is not All-in-one
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| (BUS_FREQ_66P82 << BUS_SPEED_POS) // set bus frequency
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| UNKNOWN_BIT_0; // pull up bit 0
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gMachineObj->add_device("MachineID", std::unique_ptr<GossamerID>(new GossamerID(sys_reg)));
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grackle_obj->add_mmio_region(
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0xFF000000, 4096, dynamic_cast<MMIODevice*>(gMachineObj->get_comp_by_name("MachineID")));
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// allocate ROM region
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if (!grackle_obj->add_rom_region(0xFFC00000, 0x400000)) {
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LOG_F(ERROR, "Could not allocate ROM region!");
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return -1;
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}
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// configure RAM slots
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setup_ram_slot("RAM_DIMM_1", 0x57, GET_INT_PROP("rambank1_size"));
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setup_ram_slot("RAM_DIMM_2", 0x56, GET_INT_PROP("rambank2_size"));
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setup_ram_slot("RAM_DIMM_3", 0x55, GET_INT_PROP("rambank3_size"));
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// add pci devices
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grackle_obj->pci_register_device(
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DEV_FUN(0x10,0), dynamic_cast<PCIDevice*>(gMachineObj->get_comp_by_name("Heathrow")));
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grackle_obj->pci_register_device(
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DEV_FUN(0x12,0), dynamic_cast<PCIDevice*>(gMachineObj->get_comp_by_name(id == "pmg3twr" ? "AtiRagePro" : "AtiRageGT")));
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// add Athens clock generator device and register it with the I2C host
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gMachineObj->add_device("Athens", std::unique_ptr<AthensClocks>(new AthensClocks(0x28)));
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I2CBus* i2c_bus = dynamic_cast<I2CBus*>(gMachineObj->get_comp_by_type(HWCompType::I2C_HOST));
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i2c_bus->register_device(0x28, dynamic_cast<I2CDevice*>(gMachineObj->get_comp_by_name("Athens")));
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// create ID EEPROM for the Whisper personality card and register it with the I2C host
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gMachineObj->add_device("Perch", std::unique_ptr<I2CProm>(new I2CProm(0x53, 256)));
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I2CProm* perch_id = dynamic_cast<I2CProm*>(gMachineObj->get_comp_by_name("Perch"));
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perch_id->fill_memory(0, 256, 0);
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perch_id->fill_memory(32, 223, 0xFF);
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perch_id->set_memory(0, WhisperID, sizeof(WhisperID));
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i2c_bus->register_device(0x53, perch_id);
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// configure CPU clocks
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uint64_t bus_freq = 66820000ULL;
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uint64_t timebase_freq = bus_freq / 4;
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// initialize virtual CPU and request MPC750 CPU aka G3
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ppc_cpu_init(grackle_obj, PPC_VER::MPC750, timebase_freq);
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// set CPU PLL ratio to 3.5
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ppc_state.spr[SPR::HID1] = 0xE << 28;
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return 0;
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}
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static const PropMap gossamer_settings = {
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{"rambank1_size",
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new IntProperty(256, vector<uint32_t>({8, 16, 32, 64, 128, 256}))},
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{"rambank2_size",
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new IntProperty( 0, vector<uint32_t>({0, 8, 16, 32, 64, 128, 256}))},
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{"rambank3_size",
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new IntProperty( 0, vector<uint32_t>({0, 8, 16, 32, 64, 128, 256}))},
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{"emmo",
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new BinProperty(0)},
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{"cdr_config",
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new StrProperty("Ide1:0")},
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};
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static vector<string> pmg3_devices = {
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"Grackle", "ScreamerSnd", "Heathrow", "AtiRageGT", "AtapiCdrom"
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};
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static const MachineDescription pmg3dt_descriptor = {
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.name = "pmg3dt",
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.description = "Power Macintosh G3 (Beige) Desktop",
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.devices = pmg3_devices,
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.settings = gossamer_settings,
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.init_func = &initialize_gossamer
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};
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REGISTER_MACHINE(pmg3dt, pmg3dt_descriptor);
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