mirror of
https://github.com/dingusdev/dingusppc.git
synced 2024-08-17 07:29:01 +00:00
Add PCI bridge and multi-function device support. Overview: - A multi-function device is two or more PCIDevices with the same device number but one device is function zero (as with currently implemented PCIDevices) and the other functions have function numbers between 1 and 7. The device number and function number are properties of the PCIDevice's parent PCIHost connection. - A PCIBridge is a PCIHost (it can connect child PCI devices) and a PCIDevice (it has config space, BARs, and expansion ROM). - A PCIDevice has Type 0 header. It has 6 BARs. - A PCIBridge has Type 1 header. It has 2 BARs. The config space registers beginning from offset 0x18 differ from those of a PCIDevice. Possible future modifications: - Add a PCICardBus class. It is a PCIHost. It has Type 2 header. It has one BAR. The first 20 bytes match Type 0 and Type 1 headers. These exist in New World Macs. They allow hot-plug of PCI devices. - Split base PCI registers (first 16 bytes) into a PCIBase class. Type 1 and 2 have two or one BAR but I think all 6 BARs belong in PCIBase class anyway. - Split PCIHost into two classes: Currently existing PCIHosts (Bandit, Grackle) are PCIHost and PCIRoot (they have the broadcast I/O requests functionality) while PCIBridge is PCIHost only - it can propagate I/O requests but does not originate the broadcast. - pci_register_mmio_region should maybe return a pointer to a region struct so that it can be used for unregistering or modifying the region's range. This may be useful for PCI bridges which have ranges that may constrain memory BARs of their downstream devices. PCIDevice - Moved expansion ROM BAR handling to a separate function pci_wr_exp_rom_bar so that it can be used by both PCI devices and PCI bridges which have the ROM BAR in different locations. It now supports unmapping expansion ROM. Also made exp_rom_bar not writable if there's no ROM. - Added num_bars field which specifies the number of valid BARs since Type 0, 1, and 2 headers have different number of BARs. - map_exp_rom_mem now properly unmaps expansion ROM (using new function unmap_exp_rom_mem) before mapping it again. - Added function set_multi_function which modifies hdr_type to indicate if a device has other functions. This is to be applied only to devices with function number 0. PCIHost - When attaching a PCI device, it will check if it's a multi-function device (there exists an attached function that is not zero) and adjust hdr_type of function 0 of the device accordingly. - Attached PCI bridges are added to a list of PCI bridges attached to the host. - Added pci_io_read_loop and pci_io_write_loop which loop through attached PCI devices to find one that will perform the action for the given I/O address without logging an error (since some other device might perform the action). - Added pci_io_read_broadcast and pci_io_write_broadcast which are used by a PCI root (bandit/grackle). They will log an error if the action is not performed. They should probably do a machine check exception to match real Power Macs. - pci_find_device (used by PCI root) will recursively find a PCIDevice for type 1 config register accesses. - Logging from PCIHost now includes the name of the PCIHost instead of just "PCIHost" because there can be multiple PCI hosts. PCIBridge - Sets num_bars to 2 and hdr_type to 1. - I/O ranges set in the config registers are handled correctly by pci_io_read and pci_io_write. - Memory ranges set in the config registers do not currently affect memory mmio regions. It is assumed that Open Firmware and the OS will set the ranges and BARs correctly to allow all BARs to be accessed fully. bandit, mpc106 - Bandit and Grackle now call pci_io_read_broadcast and pci_io_read_broadcast to pass I/O accesses to downstream PCI devices. - Chaos is modified to work like Bandit even though it will never have PCI bridges attached or devices that support I/O accesses. It's simpler this way.
174 lines
5.3 KiB
C++
174 lines
5.3 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/>.
|
|
*/
|
|
|
|
#ifndef PCI_HOST_H
|
|
#define PCI_HOST_H
|
|
|
|
#include <core/bitops.h>
|
|
#include <devices/deviceregistry.h>
|
|
#include <endianswap.h>
|
|
|
|
#include <cinttypes>
|
|
#include <string>
|
|
#include <unordered_map>
|
|
#include <vector>
|
|
|
|
enum {
|
|
PCI_CONFIG_DIRECTION = 1,
|
|
PCI_CONFIG_READ = 0,
|
|
PCI_CONFIG_WRITE = 1,
|
|
|
|
PCI_CONFIG_TYPE = 4,
|
|
PCI_CONFIG_TYPE_0 = 0,
|
|
PCI_CONFIG_TYPE_1 = 4,
|
|
};
|
|
|
|
/** PCI config space access details */
|
|
typedef struct AccessDetails {
|
|
uint8_t size;
|
|
uint8_t offset;
|
|
uint8_t flags;
|
|
} AccessDetails;
|
|
|
|
#define DEV_FUN(dev_num,fun_num) (((dev_num) << 3) | (fun_num))
|
|
|
|
class PCIDevice;
|
|
class PCIBridge;
|
|
|
|
class PCIHost {
|
|
public:
|
|
PCIHost() {
|
|
this->dev_map.clear();
|
|
io_space_devs.clear();
|
|
};
|
|
~PCIHost() = default;
|
|
|
|
virtual bool pci_register_device(int dev_fun_num, PCIDevice* dev_instance);
|
|
|
|
virtual bool pci_register_mmio_region(uint32_t start_addr, uint32_t size, PCIDevice* obj);
|
|
virtual bool pci_unregister_mmio_region(uint32_t start_addr, uint32_t size, PCIDevice* obj);
|
|
|
|
virtual void attach_pci_device(std::string& dev_name, int slot_id);
|
|
|
|
virtual bool pci_io_read_loop (uint32_t offset, int size, uint32_t &res);
|
|
virtual bool pci_io_write_loop(uint32_t offset, int size, uint32_t value);
|
|
|
|
virtual uint32_t pci_io_read_broadcast (uint32_t offset, int size);
|
|
virtual void pci_io_write_broadcast(uint32_t offset, int size, uint32_t value);
|
|
|
|
virtual PCIDevice *pci_find_device(uint8_t bus_num, uint8_t dev_num, uint8_t fun_num);
|
|
|
|
protected:
|
|
std::unordered_map<int, PCIDevice*> dev_map;
|
|
std::vector<PCIDevice*> io_space_devs;
|
|
std::vector<PCIBridge*> bridge_devs;
|
|
};
|
|
|
|
// Helpers for data conversion in the PCI Configuration space.
|
|
|
|
/**
|
|
Perform size dependent endian swapping for value that is dword from PCI config.
|
|
|
|
Unaligned data is handled properly by wrapping around if needed.
|
|
*/
|
|
inline uint32_t pci_conv_rd_data(uint32_t value, AccessDetails &details) {
|
|
switch (details.size << 2 | details.offset) {
|
|
// Bytes
|
|
case 0x04:
|
|
return value & 0xFF; // 0
|
|
case 0x05:
|
|
return (value >> 8) & 0xFF; // 1
|
|
case 0x06:
|
|
return (value >> 16) & 0xFF; // 2
|
|
case 0x07:
|
|
return (value >> 24) & 0xFF; // 3
|
|
|
|
// Words
|
|
case 0x08:
|
|
return BYTESWAP_16(value); // 0 1
|
|
case 0x09:
|
|
return BYTESWAP_16((value >> 8) & 0xFFFFU); // 1 2
|
|
case 0x0A:
|
|
return BYTESWAP_16((value >> 16) & 0xFFFFU); // 2 3
|
|
case 0x0B:
|
|
return ((value >> 16) & 0xFF00) | (value & 0xFF); // 3 0
|
|
|
|
// Dwords
|
|
case 0x10:
|
|
return BYTESWAP_32(value); // 0 1 2 3
|
|
case 0x11:
|
|
return ROTL_32(BYTESWAP_32(value), 8); // 1 2 3 0
|
|
case 0x12:
|
|
return ROTL_32(BYTESWAP_32(value), 16); // 2 3 0 1
|
|
case 0x13:
|
|
return ROTR_32(BYTESWAP_32(value), 8); // 3 0 1 2
|
|
default:
|
|
return 0xFFFFFFFFUL;
|
|
}
|
|
}
|
|
|
|
/**
|
|
Perform size dependent endian swapping for v2, then merge v2 with v1 under
|
|
control of a mask generated according with the size parameter.
|
|
|
|
Unaligned data is handled properly by wrapping around if needed.
|
|
*/
|
|
inline uint32_t pci_conv_wr_data(uint32_t v1, uint32_t v2, AccessDetails &details)
|
|
{
|
|
switch (details.size << 2 | details.offset) {
|
|
// Bytes
|
|
case 0x04:
|
|
return (v1 & ~0xFF) | (v2 & 0xFF); // 3 2 1 d0
|
|
case 0x05:
|
|
return (v1 & ~0xFF00) | ((v2 & 0xFF) << 8); // 3 2 d0 0
|
|
case 0x06:
|
|
return (v1 & ~0xFF0000) | ((v2 & 0xFF) << 16); // 3 d0 1 0
|
|
case 0x07:
|
|
return (v1 & 0x00FFFFFF) | ((v2 & 0xFF) << 24); // d0 2 1 0
|
|
|
|
// Words
|
|
case 0x08:
|
|
return (v1 & ~0xFFFF) | BYTESWAP_16(v2); // 3 2 d1 d0
|
|
case 0x09:
|
|
return (v1 & ~0xFFFF00) | (BYTESWAP_16(v2) << 8); // 3 d1 d0 0
|
|
case 0x0a:
|
|
return (v1 & 0x0000FFFF) | (BYTESWAP_16(v2) << 16); // d1 d0 1 0
|
|
case 0x0b:
|
|
return (v1 & 0x00FFFF00) | ((v2 & 0xFF00) << 16) |
|
|
(v2 & 0xFF); // d0 2 1 d1
|
|
|
|
// Dwords
|
|
case 0x10:
|
|
return BYTESWAP_32(v2); // d3 d2 d1 d0
|
|
case 0x11:
|
|
return ROTL_32(BYTESWAP_32(v2), 8); // d2 d1 d0 d3
|
|
case 0x12:
|
|
return ROTL_32(BYTESWAP_32(v2), 16); // d1 d0 d3 d2
|
|
case 0x13:
|
|
return ROTR_32(BYTESWAP_32(v2), 8); // d0 d3 d2 d1
|
|
|
|
default:
|
|
return 0xFFFFFFFFUL;
|
|
}
|
|
}
|
|
|
|
#endif /* PCI_HOST_H */
|