BarinkOS/kernel/pci/pci.h

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#pragma once
#include <stdint.h>
#include "../io/io.h"
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#include "../terminal/kterm.h"
#include "pciDevice.h"
// Configuration Space Access Mechanism #1
#define CONFIG_ADDRESS 0xCF8 // Configuration adress that is to be accessed
#define CONFIG_DATA 0xCFC // Will do the actual configuration operation
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#define PCI_BUS_ADDR_SHIFT 16
#define PCI_DEVICE_ADDR_SHIFT 11
#define PCI_FUNCTION_ADDR_SHIFT 8
#define PCI_ENABLE_ADDR_SHIFT 31
class PCI {
public:
static void Scan();
static uint32_t ConfigReadWord ( PCIBusAddress& PCIDeviceAddress , uint8_t offset);
static uint8_t GetProgIF (PCIBusAddress& PCIDeviceAddress);
static uint32_t ReadBAR ( PCIBusAddress& PCIDeviceAddress, int bar_number);
static uint32_t ConfigReadWord (uint8_t bus, uint8_t device, uint8_t func, uint8_t offset);
static uint8_t GetHeaderType( PCIBusAddress& PCIDeviceAddress );
static uint16_t GetClassCodes( PCIBusAddress& PCIDeviceAddress );
static bool IsMultiFunctionDevice(PCIBusAddress& PCIDeviceAddress);
static uint64_t GetDevice (int bus, int device, int function );
static const char* getClassName (uint8_t ClassCode);
static const char* getVendor( uint32_t VendorID);
static void PrintPCIDevice(PCIBusAddress& PCIDevice);
private:
struct ClassCode {
const char* name;
uint8_t code;
};
static constexpr ClassCode ClassCodeNames []= {
{"Unclassified", 0x0},
{"MassStorage Controller", 0x1},
{"Network Controller", 0x2},
{"Display Controller", 0x3},
{"Multimedia Controller", 0x4},
{"Memory Controller", 0x5},
{"Bridge", 0x6},
{"Simple Communication Controller", 0x7},
{"Base System Peripheral", 0x8},
{"Input Device Controller", 0x9},
{"Docking Station", 0xA},
{"Processor", 0xB},
{"Serial Bus Controller", 0xC},
{ "Wireless Controller", 0xD},
{"Intelligent Controller", 0xE},
{"Satellite Communication Controller", 0xF},
{"Encryption Controller", 0x10},
{"Signal Processing Controller", 0x11},
{ "Processing Accelerator", 0x12},
{ "Non-Essential Instrumentation", 0x13}
};
static const uint8_t KnownClassCodes = sizeof(ClassCodeNames) / sizeof(ClassCode);
};