Initial Houdini2 emulation.
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/*
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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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/** Houdini2 PC Compatibility card emulation. */
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#include <devices/deviceregistry.h>
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#include <devices/common/hwcomponent.h>
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#include <devices/common/nubus/houdini2.h>
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#include <devices/common/nubus/nubusutils.h>
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#include <devices/memctrl/memctrlbase.h>
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#include <loguru.hpp>
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#include <machines/machinebase.h>
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#include <cinttypes>
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HoudiniCard::HoudiniCard()
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{
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supports_types(HWCompType::PDS_DEV);
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this->pl_obj = std::unique_ptr<PretzelLogic> (new PretzelLogic());
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auto mem_crtl = dynamic_cast<MemCtrlBase*>(gMachineObj->get_comp_by_type(HWCompType::MEM_CTRL));
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mem_crtl->add_mmio_region(0xE0000000, 0x10000, this->pl_obj.get());
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// load card's declaration ROM
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if (load_declaration_rom("Houdini2_DeclROM.bin", 0xE)) {
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LOG_F(ERROR, "Could not load declaration ROM, the card won't work!");
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}
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}
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PretzelLogic::PretzelLogic()
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{
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supports_types(HWCompType::MMIO_DEV);
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// tell the world we got some own memory
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// (shared memory will be disabled)
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this->air3 = Air3Bits::SIMM_INSTALLED;
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this->air_reset = 1; // tell the world our PC is not currently running
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}
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uint32_t PretzelLogic::read(uint32_t rgn_start, uint32_t offset, int size)
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{
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switch (offset) {
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case PretzelLogicReg::AIR_RESET:
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return this->air_reset;
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case PretzelLogicReg::AIR3:
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return this->air3;
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default:
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LOG_F(WARNING, "PretzelLogic: reading from unimplemented reg at 0x%X", offset);
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}
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return 0xFF;
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}
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void PretzelLogic::write(uint32_t rgn_start, uint32_t offset, uint32_t value, int size)
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{
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switch (offset) {
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case PretzelLogicReg::MAIN_IER:
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this->main_ier = value;
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if (!value) {
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LOG_F(INFO, "PretzelLogic: all interrupts disabled");
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}
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break;
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default:
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LOG_F(WARNING, "PretzelLogic: writing to unimplemented reg at 0x%X", offset);
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}
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}
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static const DeviceDescription Houdini_Descriptor = {
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HoudiniCard::create, {}, {}
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};
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REGISTER_DEVICE(Houdini2, Houdini_Descriptor);
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@ -0,0 +1,75 @@
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/*
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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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/** Houdini2 PC Compatibility card definitions. */
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#ifndef HOUDINI2_H
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#define HOUDINI2_H
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#include <devices/common/mmiodevice.h>
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#include <cinttypes>
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#include <memory>
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enum PretzelLogicReg {
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MAIN_IER = 0xE0,
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MAIN_ISR = 0xE4,
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AIR_RESET = 0xE8,
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AIR3 = 0x8004,
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};
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enum Air3Bits {
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SIMM_INSTALLED = 1 << 7, // if set, on-card memory SIMM is installed
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};
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// Pretzel Logic ASIC
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class PretzelLogic : public MMIODevice {
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public:
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PretzelLogic();
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~PretzelLogic() = default;
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uint32_t read(uint32_t rgn_start, uint32_t offset, int size);
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void write(uint32_t rgn_start, uint32_t offset, uint32_t value, int size);
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private:
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uint8_t air_reset;
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uint8_t air_status;
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uint8_t air2;
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uint8_t air3;
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uint8_t port_AB_dir;
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uint8_t port_AB_data;
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uint8_t main_ier; // main interrupt enable register
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};
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class HoudiniCard : public HWComponent {
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public:
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HoudiniCard();
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~HoudiniCard() = default;
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static std::unique_ptr<HWComponent> create() {
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return std::unique_ptr<HoudiniCard>(new HoudiniCard());
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};
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private:
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std::unique_ptr<PretzelLogic> pl_obj;
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};
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#endif // HOUDINI2_H
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