67 lines
1.9 KiB
C++
67 lines
1.9 KiB
C++
/*
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DingusPPC - The Experimental PowerPC Macintosh emulator
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Copyright (C) 2018-21 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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/** Highspeed Memory Controller emulation.
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Author: Max Poliakovski
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Highspeed Memory Controller (HMC) is a custom memory
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and L2 cache controller designed especially for the
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first generation of the Power Macintosh computer.
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*/
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#ifndef HMC_H
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#define HMC_H
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#include <devices/common/mmiodevice.h>
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#include <devices/memctrl/memctrlbase.h>
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#include <cinttypes>
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#include <memory>
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/** Bit in the HMC control register telling us where the frame bufffer
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for the on-board video is located. */
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#define HMC_VBASE_BIT 33
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class HMC : public MemCtrlBase, public MMIODevice {
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public:
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HMC();
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~HMC() = default;
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static std::unique_ptr<HWComponent> create() {
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return std::unique_ptr<HMC>(new HMC());
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}
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/* MMIODevice methods */
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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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uint64_t get_control_reg(void) {
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return this->ctrl_reg;
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};
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private:
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int bit_pos;
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uint64_t ctrl_reg;
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};
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#endif // HMC_H
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