mirror of
https://github.com/dingusdev/dingusppc.git
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35f2ce14f1
Add supports_types to device descriptors so that we can determine supported types without having to create the hardware device. Add description so that each device can have an optional description.
129 lines
3.5 KiB
C++
129 lines
3.5 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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/** PSX Memory Controller emulation. */
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#include <devices/deviceregistry.h>
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#include <devices/memctrl/psx.h>
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#include <loguru.hpp>
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#include <cinttypes>
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#include <string>
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PsxCtrl::PsxCtrl(int bridge_num, std::string name)
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{
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this->name = name;
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supports_types(HWCompType::MEM_CTRL | HWCompType::MMIO_DEV);
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// add MMIO region for the PSX control registers
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this->add_mmio_region(0xF8000000, 0x70, this);
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this->sys_id = 0x10000000;
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this->chip_rev = 0; // old PSX, what's about PSX+?
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this->sys_config = PSX_BUS_SPEED_50;
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}
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uint32_t PsxCtrl::read(uint32_t rgn_start, uint32_t offset, int size)
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{
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switch (offset >> 3) {
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case PsxReg::Sys_Id:
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return this->sys_id;
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case PsxReg::Revision:
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return this->chip_rev;
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case PsxReg::Sys_Config:
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return this->sys_config;
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default:
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LOG_F(WARNING, "PSX: read from unsupported control register at 0x%X", offset);
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return 0;
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}
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}
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void PsxCtrl::write(uint32_t rgn_start, uint32_t offset, uint32_t value, int size)
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{
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switch (offset >> 3) {
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case PsxReg::Sys_Config:
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this->sys_config = value;
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break;
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case PsxReg::ROM_Config:
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this->rom_cfg = value;
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break;
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case PsxReg::DRAM_Config:
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this->dram_cfg = value;
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break;
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case PsxReg::DRAM_Refresh:
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this->dram_refresh = value;
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break;
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case PsxReg::Flash_Config:
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this->flash_cfg = value;
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break;
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case PsxReg::Page1_Mapping:
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case PsxReg::Page2_Mapping:
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case PsxReg::Page3_Mapping:
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case PsxReg::Page4_Mapping:
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case PsxReg::Page5_Mapping:
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this->pages_cfg[(offset >> 3) - PsxReg::Page1_Mapping] = value;
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break;
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default:
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LOG_F(WARNING, "PSX: write to unsupported/read-only control register at 0x%X", offset);
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};
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}
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void PsxCtrl::insert_ram_dimm(int slot_num, uint32_t capacity)
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{
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if (slot_num < 0 || slot_num >= 5) {
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ABORT_F("PSX: invalid DIMM slot %d", slot_num);
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}
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switch (capacity) {
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case 0:
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break;
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case DRAM_CAP_2MB:
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case DRAM_CAP_4MB:
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case DRAM_CAP_8MB:
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case DRAM_CAP_16MB:
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case DRAM_CAP_32MB:
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this->bank_sizes[slot_num] = capacity;
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break;
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default:
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ABORT_F("PSX: unsupported DRAM capacity %d", capacity);
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}
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}
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void PsxCtrl::map_phys_ram()
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{
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uint32_t total_ram = 0;
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for (int i = 0; i < 5; i++) {
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total_ram += this->bank_sizes[i];
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}
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if (!add_ram_region(0x00000000, total_ram)) {
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ABORT_F("PSX: could not allocate RAM storage");
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}
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}
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static const DeviceDescription Psx_Descriptor = {
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PsxCtrl::create, {}, {}, HWCompType::MEM_CTRL | HWCompType::MMIO_DEV
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};
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REGISTER_DEVICE(Psx, Psx_Descriptor);
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