pci.h

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#define PCI_OFFSET_VENDORID     0x00
#define PCI_OFFSET_DEVICEID     0x02
#define PCI_OFFSET_COMMAND      0x04
#define PCI_OFFSET_STATUS       0x06
#define PCI_OFFSET_REVISIONID   0x08
#define PCI_OFFSET_PROGIF       0x09
#define PCI_OFFSET_SUBCLASS     0x0A
#define PCI_OFFSET_CLASS        0x0B
#define PCI_OFFSET_CACHELINE    0x0C
#define PCI_OFFSET_LATENCYTMR   0x0D
#define PCI_OFFSET_HEADERTYPE   0x0E
#define PCI_OFFSET_BIST         0x0F
 
#define PCI_OFFSET_BARFIRST     0x10
#define PCI_OFFSET_BARLAST      0x24
 
#define PCI_OFFSET_IRQLINE      0x3C
 
#define PCI_COMMAND_IOENABLE    0x0001
#define PCI_COMMAND_MEMENABLE   0x0002
#define PCI_COMMAND_BUSMASTER   0x0004
 
#define PCI_MAX_BARS            6
 
#define PCI_CLASS_STORAGE       0x01
#define PCI_CLASS_NETWORK       0x02
#define PCI_CLASS_GRAPHICS      0x03
#define PCI_CLASS_BRIDGE        0x06
#define PCI_CLASS_BUS           0x0C
 
#define PCI_SCLASS_STORAGE_IDE  0x01
#define PCI_SCLASS_STORAGE_SATA 0x06
 
#define PCI_SCLASS_BRIDGE_HOST  0x00
#define PCI_SCLASS_BRIDGE_ISA   0x01
#define PCI_SCLASS_BRIDGE_PCI   0x04
#define PCI_SCLASS_BRIDGE_MISC  0x80
 
#define PCI_SCLASS_BUS_FW       0x00
#define PCI_SCLASS_BUS_USB      0x03
#define PCI_SCLASS_BUS_SMBUS    0x05
 
#define PCIBAR_TYPE_NULL        0
#define PCIBAR_TYPE_IO          1
#define PCIBAR_TYPE_MEM         2
 
typedef struct PCIBAR
{
    uint32_t base;
    uint32_t size;
    uint32_t type;
} PCIBAR;
 
typedef struct PCIDevice
{
    uint16_t vendor;
    uint16_t device;
 
    uint8_t bus;
    uint8_t slot;
    uint8_t func;
 
    uint8_t irq;
 
    PCIBAR bars[PCI_MAX_BARS];
} PCIDevice;
 
void PCI_Init();
 
uint8_t PCI_CfgRead8(PCIDevice *dev, uint32_t reg);
uint16_t PCI_CfgRead16(PCIDevice *dev, uint32_t reg);
uint32_t PCI_CfgRead32(PCIDevice *dev, uint32_t reg);
void PCI_CfgWrite8(PCIDevice *dev, uint32_t reg, uint8_t data);
void PCI_CfgWrite16(PCIDevice *dev, uint32_t reg, uint16_t data);
void PCI_CfgWrite32(PCIDevice *dev, uint32_t reg, uint32_t data);
 
uint16_t PCI_GetDeviceID(PCIDevice *dev);
uint16_t PCI_GetVendorID(PCIDevice *dev);
uint8_t PCI_GetBaseClass(PCIDevice *dev);
uint8_t PCI_GetSubClass(PCIDevice *dev);
uint8_t PCI_GetHeaderType(PCIDevice *dev);
 
void PCI_Configure(PCIDevice *dev);