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https://github.com/dingusdev/dingusppc.git
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64 lines
1.9 KiB
C++
64 lines
1.9 KiB
C++
/*
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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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/** Platinum Memory Controller emulation. */
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#include "platinum.h"
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#include <loguru.hpp>
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#include <cinttypes>
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using namespace Platinum;
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PlatinumCtrl::PlatinumCtrl() : MemCtrlBase()
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{
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this->name = "Platinum Memory Controller";
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// add MMIO region for the configuration and status registers
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add_mmio_region(0xF8000000, 0x500, this);
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// initialize the CPUID register with the following CPU:
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// PowerPC 601 @ 75 MHz, bus frequency: 37,5 MHz
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this->cpu_id = (0x3001 << 16) | ClkSrc3 | (CpuSpeed3::CPU_75_BUS_38 << 8);
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}
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uint32_t PlatinumCtrl::read(uint32_t reg_start, uint32_t offset, int size)
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{
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if (size != 4) {
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LOG_F(WARNING, "Platinum: unsupported register access size %d!", size);
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return 0;
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}
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switch (offset) {
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case PlatinumReg::CPU_ID:
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return this->cpu_id;
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default:
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LOG_F(WARNING, "Platinum: unknown register read at offset 0x%X", offset);
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}
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return 0;
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}
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void PlatinumCtrl::write(uint32_t reg_start, uint32_t offset, uint32_t value, int size)
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{
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LOG_F(WARNING, "Platinum: unknown register write at offset 0x%X", offset);
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}
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