diff --git a/headers/private/kernel/pci_priv.h b/headers/private/kernel/pci_priv.h
index 99fb257d73..d4602d0284 100644
--- a/headers/private/kernel/pci_priv.h
+++ b/headers/private/kernel/pci_priv.h
@@ -1,15 +1,22 @@
 #include <BeBuild.h>
 #include <SupportDefs.h>
 
-status_t 	pci_config_init();
-uint32		read_pci_config(uint8 bus, uint8 device, uint8 function, uint8 offset, uint8 size);
-void		write_pci_config(uint8 bus, uint8 device, uint8 function, uint8 offset, uint8 size, uint32	value);
+status_t 	pci_config_init(void);
+uint32		pci_read_config(uint8 bus, uint8 device, uint8 function, uint8 offset, uint8 size);
+void		pci_write_config(uint8 bus, uint8 device, uint8 function, uint8 offset, uint8 size, uint32	value);
+void *		pci_ram_address(const void *physical_address_in_system_memory);
 
-status_t 	pci_io_init();
-uint8		read_io_8(int mapped_io_addr);
-void		write_io_8(int mapped_io_addr, uint8 value);
-uint16		read_io_16(int mapped_io_addr);
-void		write_io_16(int mapped_io_addr, uint16 value);
-uint32		read_io_32(int mapped_io_addr);
-void		write_io_32(int mapped_io_addr, uint32 value);
-void *		ram_address(const void *physical_address_in_system_memory);
+status_t 	pci_io_init(void);
+uint8		pci_read_io_8(int mapped_io_addr);
+void		pci_write_io_8(int mapped_io_addr, uint8 value);
+uint16		pci_read_io_16(int mapped_io_addr);
+void		pci_write_io_16(int mapped_io_addr, uint16 value);
+uint32		pci_read_io_32(int mapped_io_addr);
+void		pci_write_io_32(int mapped_io_addr, uint32 value);
+
+status_t	pci_irq_init(void);
+uint8		pci_read_irq(uint8 bus, uint8 device, uint8 function, uint8 line);
+void		pci_write_irq(uint8 bus, uint8 device, uint8 function, uint8 line, uint8 irq);
+
+extern int	gMaxBusDevices;
+extern bool gIrqRouterAvailable;