dingusppc/devices/memctrl/mpc106.h
2024-02-20 01:53:32 +01:00

120 lines
4.3 KiB
C++

/*
DingusPPC - The Experimental PowerPC Macintosh emulator
Copyright (C) 2018-23 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/>.
*/
/** MPC106 (Grackle) definitions.
Grackle IC is a combined memory and PCI controller manufactured by Motorola.
It's the central device in the Gossamer architecture.
Manual: https://www.nxp.com/docs/en/reference-manual/MPC106UM.pdf
This code emulates as much functionality as needed to run Power Mac Beige G3.
This implies that
- we only support address map B
- our virtual device reports revision 4.0 as expected by machine firmware
*/
#ifndef MPC106_H
#define MPC106_H
#include <devices/common/pci/pcidevice.h>
#include <devices/common/pci/pcihost.h>
#include <devices/memctrl/memctrlbase.h>
#include <cinttypes>
#include <memory>
/** Grackle configuration space registers. */
enum GrackleReg : uint32_t {
CFG10 = 0x40, // bus # + subordinate bus # + disconnect counter
PMCR1 = 0x70, // power management config 1
MSAR1 = 0x80, // memory starting address 1
MSAR2 = 0x84, // memory starting address 2
EMSAR1 = 0x88, // extended memory starting address 1
EMSAR2 = 0x8C, // extended memory starting address 2
MEAR1 = 0x90, // memory ending address 1
MEAR2 = 0x94, // memory ending address 2
EMEAR1 = 0x98, // extended memory ending address 1
EMEAR2 = 0x9C, // extended memory ending address 2
MBER = 0xA0, // memory bank enable
PICR1 = 0xA8, // processor interface configuration 1
PICR2 = 0xAC, // processor interface configuration 2
MCCR1 = 0xF0, // memory control configuration 1
MCCR2 = 0xF4, // memory control configuration 2
MCCR3 = 0xF8, // memory control configuration 3
MCCR4 = 0xFC // memory control configuration 4
};
/* MCCR1 bit definitions. */
enum {
MEMGO = 1 << 19,
};
class MPC106 : public MemCtrlBase, public PCIDevice, public PCIHost {
public:
MPC106();
~MPC106() = default;
static std::unique_ptr<HWComponent> create() {
return std::unique_ptr<MPC106>(new MPC106());
}
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);
int device_postinit();
protected:
/* PCI access */
uint32_t pci_read(uint32_t offset, uint32_t size);
void pci_write(uint32_t offset, uint32_t value, uint32_t size);
/* my own PCI configuration registers access */
uint32_t pci_cfg_read(uint32_t reg_offs, AccessDetails &details);
void pci_cfg_write(uint32_t reg_offs, uint32_t value, AccessDetails &details);
void setup_ram(void);
private:
inline void cfg_setup(uint32_t offset, int size, int &bus_num, int &dev_num,
int &fun_num, uint8_t &reg_offs, AccessDetails &details,
PCIDevice *&device);
uint32_t config_addr;
uint16_t pmcr1 = 0; // power management config 1
uint8_t pmcr2 = 0; // power management config 2
uint8_t odcr = 0xCD; // output driver control
uint32_t picr1 = 0xFF100010; // ROM on CPU bus, address map B, CPU type = MPC601
uint32_t picr2 = 0x000C060C;
uint32_t mccr1 = 0xFF820000; // 64bit ROM bus
uint32_t mccr2 = 3;
uint32_t mccr3 = 0;
uint32_t mccr4 = 0x00100000;
uint32_t mem_start[2] = {};
uint32_t ext_mem_start[2] = {};
uint32_t mem_end[2] = {};
uint32_t ext_mem_end[2] = {};
uint8_t mem_bank_en = 0;
};
#endif // MPC106_H