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#ifndef _GPXE_DEVICE_H
#define _GPXE_DEVICE_H
/**
* @file
*
* Device model
*
*/
#include <gpxe/list.h>
#include <gpxe/tables.h>
/** A PCI device description */
struct pci_device_description {
/** Bus type
*
* Must be @c BUS_TYPE_PCI.
*/
unsigned int bus_type;
/** Bus:dev.fn address
*
* As constructed by PCI_BUSDEVFN().
*/
unsigned int busdevfn;
/** Vendor ID */
unsigned int vendor;
/** Device ID */
unsigned int device;
};
/** PCI bus type */
#define BUS_TYPE_PCI 1
/** An ISAPnP device description */
struct isapnp_device_description {
/** Bus type
*
* Must be @c BUS_TYPE_ISAPNP.
*/
unsigned int bus_type;
};
/** PCI bus type */
#define BUS_TYPE_ISAPNP 2
/** A hardware device description */
union device_description {
/** Bus type
*
* This must be a BUS_TYPE_XXX constant.
*/
unsigned int bus_type;
/** PCI device description */
struct pci_device_description pci;
/** ISAPnP device description */
struct isapnp_device_description isapnp;
};
/** A hardware device */
struct device {
/** Name */
char name[16];
/** Device description */
union device_description desc;
/** Devices on the same bus */
struct list_head siblings;
/** Devices attached to this device */
struct list_head children;
/** Bus device */
struct device *parent;
};
/**
* A root device
*
* Root devices are system buses such as PCI, EISA, etc.
*
*/
struct root_device {
/** Device chain
*
* A root device has a NULL parent field.
*/
struct device dev;
/** Root device driver */
struct root_driver *driver;
};
/** A root device driver */
struct root_driver {
/**
* Add root device
*
* @v rootdev Root device
* @ret rc Return status code
*
* Called from probe_devices() for all root devices in the build.
*/
int ( * probe ) ( struct root_device *rootdev );
/**
* Remove root device
*
* @v rootdev Root device
*
* Called from remove_device() for all successfully-probed
* root devices.
*/
void ( * remove ) ( struct root_device *rootdev );
};
/** Declare a root device */
#define __root_device __table ( struct root_device, root_devices, 01 )
extern int probe_devices ( void );
extern void remove_devices ( void );
#endif /* _GPXE_DEVICE_H */
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