pci.h

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#ifndef PCI_H
#define PCI_H
 
#include <basics.h>
#include <hal.h>
#include <graphics.h>
#include <drivers/rtl8139.h>
#include <debugger.h>
#include <ahci.h>
#include <nvme.h>
#include <hal.h>
#include <isr.h>
#include <pci_id.h>
 
extern cstring display_adapter_name;
extern cstring GPUName[1]; //Max 2 GPUs allowed
extern string using_graphics_card;
extern int64* graphics_base_Address;
extern int total_devices;
 
// Define the base address for the PCI configuration space
#define PCI_CONFIG_ADDRESS 0xCF8
#define PCI_CONFIG_DATA    0xCFC
 
typedef void (*pci_probe_fn)(uint8_t bus, uint8_t slot, uint8_t function);
 
typedef struct {
    int16 bus;
    int16 slot;
    int16 func;
} pci_location_t;

int16 pci_read_word(int16 bus, int16 slot, int16 func, int16 offset);

int16 getVendorID(int16 bus, int16 device, int16 function);

int16 getDeviceID(int16 bus, int16 device, int16 function);

int16 getClassId(int16 bus, int16 device, int16 function);

int16 getSubClassId(int16 bus, int16 device, int16 function);
int8 getProgIF(int16 bus, int16 device, int16 function);

void probe_pci();

int32 pci_config_read_dword(int8 bus, int8 slot, int8 func, int8 offset);
void pci_config_write_dword(int8 bus, int8 slot, int8 func, int8 offset, uint32_t value);

int32 get_ahci_bar_address(int8 bus, int slot, int func, int bar_num);
 
#endif