dingusppc/devices/memctrl/platinum.h
2022-05-21 14:51:27 +02:00

168 lines
4.5 KiB
C++

/*
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/>.
*/
/** Platinum Memory Controller definitions.
Author: Max Poliakovski
Platium is a single chip memory subsystem controller designed especially
for the Power Macintosh 7200 computer, code name Catalyst.
*/
#ifndef PLATINUM_MEMCTRL_H
#define PLATINUM_MEMCTRL_H
#include <devices/common/hwcomponent.h>
#include <devices/common/mmiodevice.h>
#include <devices/memctrl/memctrlbase.h>
#include <cinttypes>
namespace Platinum {
/** Clock source encoding in the CPUID register */
enum {
ClkSrc0 = 0x0000, // 33 MHz
ClkSrc2 = 0x8000, // 20 MHz
ClkSrc3 = 0x8040 // 31,3344 MHz
};
/** CPU/Bus speed encoding for ClkSrc0 */
enum CpuSpeed0 {
CPU_66_BUS_33 = 0,
CPU_80_BUS_40_1 = 1,
CPU_80_BUS_27_1 = 2,
CPU_100_BUS_50 = 3,
CPU_100_BUS_33 = 4,
CPU_120_BUS_60 = 5,
CPU_120_BUS_40 = 6,
CPU_120_BUS_30 = 7,
CPU_133_BUS_66 = 8,
CPU_133_BUS_44 = 9,
CPU_133_BUS_33 = 10,
CPU_150_BUS_75 = 11,
CPU_150_BUS_50 = 12,
CPU_150_BUS_37 = 13
};
/** CPU/Bus speed encoding for ClkSrc2 */
enum CpuSpeed2 {
CPU_40_BUS_20 = 0,
CPU_48_BUS_24 = 1,
CPU_48_BUS_16 = 2,
CPU_60_BUS_30 = 3,
CPU_60_BUS_20 = 4,
CPU_72_BUS_36 = 5,
CPU_72_BUS_24 = 6,
CPU_72_BUS_18 = 7,
CPU_80_BUS_40_2 = 8,
CPU_80_BUS_27_2 = 9,
CPU_80_BUS_20 = 10,
CPU_90_BUS_45 = 11,
CPU_90_BUS_30 = 12,
CPU_90_BUS_22 = 13
};
/** CPU/Bus speed encoding for ClkSrc3 */
enum CpuSpeed3 {
CPU_62_BUS_31 = 0,
CPU_75_BUS_38 = 1, // actual bus frequency: 37500000 Hz
CPU_75_BUS_25 = 2,
CPU_94_BUS_47 = 3,
CPU_94_BUS_31 = 4,
CPU_113_BUS_56 = 5,
CPU_113_BUS_38 = 6, // actual bus frequency: 37500000 Hz
CPU_113_BUS_28 = 7,
CPU_125_BUS_64 = 8, // actual bus frequency: 63500000 Hz
CPU_125_BUS_42 = 9,
CPU_125_BUS_31 = 10,
CPU_141_BUS_72 = 11, // actual bus frequency: 71500000 Hz
CPU_141_BUS_47 = 12,
CPU_141_BUS_35 = 13
};
/** Configuration and status register offsets. */
enum PlatinumReg : uint32_t {
CPU_ID = 0x000,
ASIC_REVISION = 0x010,
ROM_TIMING = 0x020,
CACHE_CONFIG = 0x030,
DRAM_TIMING = 0x040,
DRAM_REFRESH = 0x050,
BANK_0_BASE = 0x060,
BANK_1_BASE = 0x070,
BANK_2_BASE = 0x080,
BANK_3_BASE = 0x090,
BANK_4_BASE = 0x0A0,
BANK_5_BASE = 0x0B0,
BANK_6_BASE = 0x0C0,
BANK_7_BASE = 0x0D0,
GP_SW_SCRATCH = 0x0E0,
PCI_ADDR_MASK = 0x0F0,
FB_CONFIG_1 = 0x140,
FB_CONFIG_2 = 0x150,
VRAM_REFRESH = 0x1B0,
};
enum {
DRAM_CAP_2MB = (1 << 21),
DRAM_CAP_4MB = (1 << 22),
DRAM_CAP_8MB = (1 << 23),
DRAM_CAP_16MB = (1 << 24),
DRAM_CAP_32MB = (1 << 25),
DRAM_CAP_64MB = (1 << 26),
DRAM_CAP_128MB = (1 << 27),
};
}; // namespace Platinum
class PlatinumCtrl : public MemCtrlBase, public MMIODevice {
public:
PlatinumCtrl();
~PlatinumCtrl() = default;
bool supports_type(HWCompType type) {
return (type == HWCompType::MEM_CTRL || type == HWCompType::MMIO_DEV);
}
/* MMIODevice methods */
uint32_t read(uint32_t reg_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 cpu_id;
uint8_t cpu_type; // 0 - MPC601, 1 - 603/604 CPU
// memory controller state
uint32_t rom_timing = 0;
uint32_t dram_timing = 0xEFF;
uint32_t dram_refresh = 0x1F4;
uint32_t fb_config_2 = 0x1FFF;
uint32_t vram_refresh = 0x1F4;
uint32_t bank_base[8];
uint32_t bank_size[8] = { 0 };
};
#endif // PLATINUM_MEMCTRL_H