dingusppc/devices/common/pci/bandit.h
2022-12-19 01:28:16 +01:00

110 lines
3.5 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/>.
*/
/** Bandit ARBus-to-PCI bridge definitions.
The Bandit ASIC is a custom ARBus-to-PCI bridge used in the second
generation of the Power Macintosh computer equipped with the PCI bus.
*/
#ifndef BANDIT_PCI_H
#define BANDIT_PCI_H
#include <devices/common/hwcomponent.h>
#include <devices/common/mmiodevice.h>
#include <devices/common/pci/pcidevice.h>
#include <devices/common/pci/pcihost.h>
#include <cinttypes>
#include <memory>
#include <string>
#include <unordered_map>
#define BANDIT_ID_SEL (1 << 0) // Bandit's own IDSEL
#define BANDIT_CAR_TYPE (1 << 0) // Bandit config address type bit
#define BANDIT_CONFIG_SPACE 0x00800000 // Bandit Config Space bit
/** Bandit specific configuration registers. */
enum {
BANDIT_ADDR_MASK = 0x48,
BANDIT_MODE_SELECT = 0x50,
BANDIT_ARBUS_RD_HOLD_OFF = 0x58,
};
/** checks if one bit is set at time, return 0 if not */
#define SINGLE_BIT_SET(val) ((val) && !((val) & ((val)-1)))
class Bandit : public PCIHost, public PCIDevice {
public:
Bandit(int bridge_num, std::string name, int dev_id=1, int rev=3);
~Bandit() = default;
static std::unique_ptr<HWComponent> create_first() {
return std::unique_ptr<Bandit>(new Bandit(1, "Bandit-PCI1"));
};
static std::unique_ptr<HWComponent> create_psx_first() {
return std::unique_ptr<Bandit>(new Bandit(1, "PSX-PCI1", 8, 0));
};
uint32_t pci_cfg_read(uint32_t reg_offs, uint32_t size);
void pci_cfg_write(uint32_t reg_offs, uint32_t value, uint32_t size);
// 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);
protected:
void verbose_address_space();
private:
uint32_t base_addr;
uint32_t config_addr;
uint32_t addr_mask;
uint32_t mode_ctrl; // controls various chip modes/features
uint32_t rd_hold_off_cnt;
};
/** Chaos is a custom ARBus-to-PCI bridge that provides a specialized
PCI-like bus for video called VCI. This 64-bit bus runs at the same
frequency as the CPU bus (40-50 MHz) and provides an interface
between video input/output devices and the CPU bus.
*/
class Chaos : public PCIHost, public MMIODevice {
public:
Chaos(std::string name);
~Chaos() = default;
static std::unique_ptr<HWComponent> create() {
return std::unique_ptr<Chaos>(new Chaos("VCI0"));
};
// 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);
private:
std::string name;
uint32_t config_addr;
};
#endif // BANDIT_PCI_H