mirror of
https://github.com/dingusdev/dingusppc.git
synced 2026-04-21 09:16:48 +00:00
joevt
113 lines
4.2 KiB
C++
113 lines
4.2 KiB
C++
/*
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DingusPPC - The Experimental PowerPC Macintosh emulator
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Copyright (C) 2018-25 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 Bondi machine (iMac G3). */
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#include <cpu/ppc/ppcemu.h>
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#include <devices/ioctrl/macio.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 const std::vector<PciIrqMap> grackle_irq_map = {
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{nullptr , DEV_FUN(0x00,0), }, // Grackle
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{"pci_A1" , DEV_FUN(0x0D,0), IntSrc::PCI_A },
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{"pci_B1" , DEV_FUN(0x0E,0), IntSrc::PCI_B },
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{"pci_C1" , DEV_FUN(0x0F,0), IntSrc::PCI_C },
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{nullptr , DEV_FUN(0x10,0), },
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{"pci_GPU" , DEV_FUN(0x12,0), IntSrc::PCI_GPU }, // Heathrow
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{"pci_PERCH", DEV_FUN(0x14,0), IntSrc::PCI_PERCH},
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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_bondi(std::string& id) {
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LOG_F(INFO, "Building machine Bondi...");
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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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grackle_obj->set_irq_map(grackle_irq_map);
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HeathrowIC* heathrow = dynamic_cast<HeathrowIC*>(gMachineObj->get_comp_by_name("Heathrow"));
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heathrow->set_media_bay_id(0x30);
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grackle_obj->pci_register_device(DEV_FUN(0x10,0), 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("AtiMach64Gx")));
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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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// First ram slot is enumerated twice for some reason, the second slot is never enumerated, so
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// put half the ram in each slot.
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setup_ram_slot("RAM_DIMM_1", 0x50, GET_INT_PROP("rambank1_size") / 2);
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setup_ram_slot("RAM_DIMM_2", 0x51, GET_INT_PROP("rambank1_size") / 2);
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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 bondi_settings = {
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{"rambank1_size", new IntProperty(128, std::vector<uint32_t>({32, 64, 128, 256, 512, 1024}))},
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{"emmo", new BinProperty(0)},
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{"hdd_config", new StrProperty("Ide0:0")},
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{"cdr_config", new StrProperty("Ide1:0")},
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};
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static std::vector<std::string> bondi_devices = {
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"Grackle", "BurgundySnd", "Heathrow", "AtiMach64Gx", "AtaHardDisk", "AtapiCdrom"};
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static const MachineDescription bondi_descriptor = {
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.name = "imacg3",
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.description = "iMac G3 Bondi Blue",
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.devices = bondi_devices,
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.settings = bondi_settings,
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.init_func = &initialize_bondi};
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REGISTER_MACHINE(imacg3, bondi_descriptor);
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