dingusppc/devices/pcidevice.h
2020-05-12 23:55:45 +05:00

79 lines
2.6 KiB
C++

/*
DingusPPC - The Experimental PowerPC Macintosh emulator
Copyright (C) 2018-20 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/>.
*/
#ifndef PCI_DEVICE_H
#define PCI_DEVICE_H
#include "mmiodevice.h"
#include "pcihost.h"
#include <cinttypes>
#include <string>
/* convert little-endian DWORD to big-endian DWORD */
#define LE2BE(x) (x >> 24) | ((x & 0x00FF0000) >> 8) | ((x & 0x0000FF00) << 8) | (x << 24)
/** PCI configuration space registers offsets */
enum {
CFG_REG_CMD = 0x04, // command/status register
CFG_REG_BAR0 = 0x10, // base address register 0
CFG_REG_BAR1 = 0x14, // base address register 1
CFG_REG_BAR2 = 0x18, // base address register 2
CFG_REG_BAR3 = 0x1C, // base address register 3
CFG_REG_BAR4 = 0x20, // base address register 4
CFG_REG_BAR5 = 0x24, // base address register 5
CFG_EXP_BASE = 0x30, // expansion ROM base
};
class PCIDevice : public MMIODevice {
public:
PCIDevice(std::string name) {
this->pci_name = name;
};
virtual ~PCIDevice() = default;
virtual bool supports_io_space(void) = 0;
/* I/O space access methods */
virtual bool pci_io_read(uint32_t offset, uint32_t size, uint32_t* res) {
return false;
};
virtual bool pci_io_write(uint32_t offset, uint32_t value, uint32_t size) {
return false;
};
/* configuration space access methods */
virtual uint32_t pci_cfg_read(uint32_t reg_offs, uint32_t size) = 0;
virtual void pci_cfg_write(uint32_t reg_offs, uint32_t value, uint32_t size) = 0;
virtual void set_host(PCIHost* host_instance) {
this->host_instance = host_instance;
};
protected:
std::string pci_name; // human-readable device name
PCIHost* host_instance; // host bridge instance to call back
uint32_t base_addr; // base address register 0
};
#endif /* PCI_DEVICE_H */