dingusppc/devices/memctrl/hmc.h
2021-12-07 22:54:03 +01:00

65 lines
1.8 KiB
C++

/*
DingusPPC - The Experimental PowerPC Macintosh emulator
Copyright (C) 2018-21 divingkatae and maximum
(theweirdo) spatium
(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
/** Highspeed Memory Controller emulation.
Author: Max Poliakovski
Highspeed Memory Controller (HMC) is a custom memory
and L2 cache controller designed especially for the
first generation of the PowerMacintosh computer.
*/
#ifndef HMC_H
#define HMC_H
#include <devices/common/hwcomponent.h>
#include <devices/common/mmiodevice.h>
#include <devices/memctrl/memctrlbase.h>
#include <cinttypes>
/** Bit in the HMC control register telling us where the frame bufffer
for the on-board video is located. */
#define HMC_VBASE_BIT 33
class HMC : public MemCtrlBase, public MMIODevice {
public:
HMC();
~HMC() = default;
bool supports_type(HWCompType type);
/* MMIODevice methods */
uint32_t read(uint32_t reg_start, uint32_t offset, int size);
void write(uint32_t reg_start, uint32_t offset, uint32_t value, int size);
uint64_t get_control_reg(void) {
return this->ctrl_reg;
};
private:
int bit_pos;
uint64_t ctrl_reg;
};
#endif // HMC_H