dingusppc/devices/memctrl/psx.h

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2022-12-21 20:58:00 +00:00
/*
DingusPPC - The Experimental PowerPC Macintosh emulator
Copyright (C) 2018-22 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/>.
*/
/** PSX Memory Controller definitions. */
#ifndef PSX_MEMCTRL_H
#define PSX_MEMCTRL_H
#include <devices/common/mmiodevice.h>
#include <devices/memctrl/memctrlbase.h>
#include <cinttypes>
#include <memory>
#include <string>
namespace PsxReg {
enum {
Sys_Id = 0,
Revision = 1,
Sys_Config = 2,
ROM_Config = 3,
DRAM_Config = 4,
DRAM_Refresh = 5,
Flash_Config = 6,
Page1_Mapping = 8,
Page2_Mapping = 9,
Page3_Mapping = 10,
Page4_Mapping = 11,
Page5_Mapping = 12,
Bus_Timeout = 13
};
}; // namespace PsxReg
/** Bus (aka CPU) speed constants. */
enum {
PSX_BUS_SPEED_38 = 0, // bus frequency 38 MHz
PSX_BUS_SPEED_33 = 1, // bus frequency 33 MHz
PSX_BUS_SPEED_40 = 2, // bus frequency 40 MHz
PSX_BUS_SPEED_50 = 3, // bus frequency 50 MHz
};
class PsxCtrl : public MemCtrlBase, public MMIODevice {
public:
PsxCtrl(int bridge_num, std::string name);
~PsxCtrl() = default;
static std::unique_ptr<HWComponent> create() {
return std::unique_ptr<PsxCtrl>(new PsxCtrl(1, "PSX-PCI1"));
};
// MMIODevice methods
uint32_t read(uint32_t rgn_start, uint32_t offset, int size);
void write(uint32_t rgn_start, uint32_t offset, uint32_t value, int size);
void insert_ram_dimm(int slot_num, uint32_t capacity);
void map_phys_ram();
private:
uint32_t sys_id;
uint32_t chip_rev;
uint32_t sys_config;
uint32_t rom_cfg;
uint32_t dram_cfg;
uint32_t dram_refresh;
uint32_t flash_cfg;
uint32_t pages_cfg[5];
uint32_t bank_sizes[5] = {};
};
#endif // PSX_MEMCTRL_H