dingusppc/machines/machineyosemite.cpp
joevt 4f45d7de35 cpu: Add cpu options to ppc_cpu_init.
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.
2024-04-10 06:43:18 -07:00

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/*
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/>.
*/
/** @file Construct the Yosemite machine (Power Macintosh G3 Blue & White). */
#include <cpu/ppc/ppcemu.h>
#include <devices/common/pci/dec21154.h>
#include <devices/memctrl/mpc106.h>
#include <devices/memctrl/spdram.h>
#include <machines/machinebase.h>
#include <machines/machinefactory.h>
#include <machines/machineproperties.h>
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);
}
int initialize_yosemite(std::string& id)
{
LOG_F(INFO, "Building machine Yosemite...");
// get pointer to the memory controller/primary PCI bridge object
MPC106* grackle_obj = dynamic_cast<MPC106*>(gMachineObj->get_comp_by_name("Grackle"));
// get pointer to the bridge of the secondary PCI bus
DecPciBridge *sec_bridge = dynamic_cast<DecPciBridge*>(gMachineObj->get_comp_by_name("Dec21154"));
// connect PCI devices
grackle_obj->pci_register_device(DEV_FUN(13,0),
dynamic_cast<PCIBase*>(gMachineObj->get_comp_by_name("Dec21154")));
sec_bridge->pci_register_device(DEV_FUN(5,0),
dynamic_cast<PCIDevice*>(gMachineObj->get_comp_by_name("Heathrow")));
// allocate ROM region
if (!grackle_obj->add_rom_region(0xFFF00000, 0x100000)) {
LOG_F(ERROR, "Could not allocate ROM region!");
return -1;
}
// configure RAM slots
setup_ram_slot("RAM_DIMM_1", 0x50, GET_INT_PROP("rambank1_size"));
setup_ram_slot("RAM_DIMM_2", 0x51, GET_INT_PROP("rambank2_size"));
setup_ram_slot("RAM_DIMM_3", 0x52, GET_INT_PROP("rambank3_size"));
setup_ram_slot("RAM_DIMM_4", 0x53, GET_INT_PROP("rambank4_size"));
// 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 yosemite_settings = {
{"rambank1_size",
new IntProperty(256, vector<uint32_t>({8, 16, 32, 64, 128, 256}))},
{"rambank2_size",
new IntProperty( 0, vector<uint32_t>({0, 8, 16, 32, 64, 128, 256}))},
{"rambank3_size",
new IntProperty( 0, vector<uint32_t>({0, 8, 16, 32, 64, 128, 256}))},
{"rambank4_size",
new IntProperty( 0, vector<uint32_t>({0, 8, 16, 32, 64, 128, 256}))},
{"emmo",
new BinProperty(0)},
{"cdr_config",
new StrProperty("Ide0:0")},
};
static vector<string> yosemite_devices = {
"Grackle", "Dec21154", "BurgundySnd", "Heathrow", "AtapiCdrom"
};
static const MachineDescription yosemite_descriptor = {
.name = "pmg3nw",
.description = "Power Macintosh G3 Blue and White",
.devices = yosemite_devices,
.settings = yosemite_settings,
.init_func = &initialize_yosemite
};
REGISTER_MACHINE(pmg3nw, yosemite_descriptor);