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https://github.com/dingusdev/dingusppc.git
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4f45d7de35
The first option is a flag that enables MPC601 (POWER) instructions for CPUs that are not MPC601. This can be useful for the following reasons: 1) To produce results similar to classic Mac OS which emulates MPC601 instructions on CPUs that don't implement MPC601 instructions. This option is used to compare the risu traces produced in Mac OS 9 on a G3 or G4 with DPPC. 2) May increase performance in apps that use POWER instructions on emulated machines with CPUs that are not MPC601. It is not known if any such apps exist but there could be since Apple included MPC601 emulation in classic Mac OS.
115 lines
4.1 KiB
C++
115 lines
4.1 KiB
C++
/*
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DingusPPC - The Experimental PowerPC Macintosh emulator
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Copyright (C) 2018-23 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 Construct the Yosemite machine (Power Macintosh G3 Blue & White). */
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#include <cpu/ppc/ppcemu.h>
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#include <devices/common/pci/dec21154.h>
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#include <devices/memctrl/mpc106.h>
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#include <devices/memctrl/spdram.h>
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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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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_yosemite(std::string& id)
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{
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LOG_F(INFO, "Building machine Yosemite...");
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// get pointer to the memory controller/primary PCI bridge object
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MPC106* grackle_obj = dynamic_cast<MPC106*>(gMachineObj->get_comp_by_name("Grackle"));
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// get pointer to the bridge of the secondary PCI bus
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DecPciBridge *sec_bridge = dynamic_cast<DecPciBridge*>(gMachineObj->get_comp_by_name("Dec21154"));
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// connect PCI devices
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grackle_obj->pci_register_device(DEV_FUN(13,0),
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dynamic_cast<PCIBase*>(gMachineObj->get_comp_by_name("Dec21154")));
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sec_bridge->pci_register_device(DEV_FUN(5,0),
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dynamic_cast<PCIDevice*>(gMachineObj->get_comp_by_name("Heathrow")));
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// allocate ROM region
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if (!grackle_obj->add_rom_region(0xFFF00000, 0x100000)) {
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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", 0x50, GET_INT_PROP("rambank1_size"));
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setup_ram_slot("RAM_DIMM_2", 0x51, GET_INT_PROP("rambank2_size"));
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setup_ram_slot("RAM_DIMM_3", 0x52, GET_INT_PROP("rambank3_size"));
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setup_ram_slot("RAM_DIMM_4", 0x53, GET_INT_PROP("rambank4_size"));
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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, false, 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 yosemite_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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{"rambank4_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("Ide0:0")},
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};
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static vector<string> yosemite_devices = {
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"Grackle", "Dec21154", "BurgundySnd", "Heathrow", "AtapiCdrom"
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};
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static const MachineDescription yosemite_descriptor = {
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.name = "pmg3nw",
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.description = "Power Macintosh G3 Blue and White",
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.devices = yosemite_devices,
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.settings = yosemite_settings,
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.init_func = &initialize_yosemite
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};
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REGISTER_MACHINE(pmg3nw, yosemite_descriptor);
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