137 lines
4.1 KiB
C++
137 lines
4.1 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/>.
|
|
*/
|
|
|
|
/** Bandit/Chaos ARBus-to-PCI bridge definitions.
|
|
|
|
Bandit is a custom ARBus-to-PCI bridge used in the second generation
|
|
of the Power Macintosh computer equipped with the PCI bus.
|
|
|
|
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 connects video input/output
|
|
devices with the CPU bus.
|
|
|
|
Chaos seems to be a Bandit variant without PCI configuration space.
|
|
It's assumed to be present in some PCI Power Macintosh models of the
|
|
first generation.
|
|
*/
|
|
|
|
#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>
|
|
|
|
#define BANDIT_DEV (11) // Bandit's own device number
|
|
#define BANDIT_CAR_TYPE (1 << 0) // Bandit config address type bit
|
|
|
|
/* Convenient macros for parsing CONFIG_ADDR fields. */
|
|
#define BUS_NUM() ((this->config_addr >> 16) & 0xFFU)
|
|
#define DEV_NUM() ((this->config_addr >> 11) & 0x1FU)
|
|
#define FUN_NUM() ((this->config_addr >> 8) & 0x07U)
|
|
#define REG_NUM() ((this->config_addr ) & 0xFCU)
|
|
|
|
/** 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)))
|
|
|
|
/*
|
|
Common functionality for Bandit/Chaos PCI host bridge.
|
|
*/
|
|
class BanditHost : public PCIHost, public MMIODevice {
|
|
public:
|
|
// 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:
|
|
uint32_t config_addr;
|
|
};
|
|
|
|
/*
|
|
PCI device for Bandit (but not for Chaos).
|
|
*/
|
|
class BanditPciDevice : public PCIDevice {
|
|
public:
|
|
BanditPciDevice(int bridge_num, std::string name, int dev_id, int rev);
|
|
~BanditPciDevice() = default;
|
|
|
|
// PCIDevice methods
|
|
uint32_t pci_cfg_read(uint32_t reg_offs, AccessDetails &details);
|
|
void pci_cfg_write(uint32_t reg_offs, uint32_t value, AccessDetails &details);
|
|
|
|
protected:
|
|
void verbose_address_space();
|
|
|
|
private:
|
|
uint32_t addr_mask;
|
|
uint32_t mode_ctrl; // controls various chip modes/features
|
|
uint32_t rd_hold_off_cnt;
|
|
};
|
|
|
|
/*
|
|
Bandit HLE emulation class.
|
|
*/
|
|
class Bandit : public BanditHost {
|
|
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));
|
|
};
|
|
|
|
private:
|
|
uint32_t base_addr;
|
|
unique_ptr<BanditPciDevice> my_pci_device;
|
|
};
|
|
|
|
/**
|
|
Chaos HLE emulation class.
|
|
*/
|
|
class Chaos : public BanditHost {
|
|
public:
|
|
Chaos(std::string name);
|
|
~Chaos() = default;
|
|
|
|
static std::unique_ptr<HWComponent> create() {
|
|
return std::unique_ptr<Chaos>(new Chaos("VCI0"));
|
|
};
|
|
};
|
|
|
|
#endif // BANDIT_PCI_H
|