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[2]; //Max 2 GPUs allowed
extern cstring using_graphics_card;
extern uint64* 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 {
    uint16 bus;
    uint16 slot;
    uint16 func;
} pci_location_t;

uint16 pci_read_word(uint16 bus, uint16 slot, uint16 func, uint16 offset);

uint16 getVendorID(uint16 bus, uint16 device, uint16 function);

uint16 getDeviceID(uint16 bus, uint16 device, uint16 function);

uint16 getClassId(uint16 bus, uint16 device, uint16 function);

uint16 getSubClassId(uint16 bus, uint16 device, uint16 function);
uint8 getRevision(uint16 bus, uint16 slot, uint16 func);
uint8 getProgIF(uint16 bus, uint16 device, uint16 function);

void probe_pci(void);
void print_lspci(void);

uint32 pci_config_read_dword(uint8 bus, uint8 slot, uint8 func, uint8 offset);
void pci_config_write_dword(uint8 bus, uint8 slot, uint8 func, uint8 offset, uint32_t value);

uint32 get_ahci_bar_address(uint8 bus, int slot, int func, int bar_num);

int proc_pci_register();
 
#endif