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#ifndef _IPXE_DEVICE_H
#define _IPXE_DEVICE_H
/**
* @file
*
* Device model
*
*/
FILE_LICENCE ( GPL2_OR_LATER );
#include <ipxe/list.h>
#include <ipxe/tables.h>
struct interface;
/** A hardware device description */
struct device_description {
/** Bus type
*
* This must be a BUS_TYPE_XXX constant.
*/
unsigned int bus_type;
/** Location
*
* The interpretation of this field is bus-type-specific.
*/
unsigned int location;
/** Vendor ID */
unsigned int vendor;
/** Device ID */
unsigned int device;
/** Device class */
unsigned long class;
/** I/O address */
unsigned long ioaddr;
/** IRQ */
unsigned int irq;
};
/** PCI bus type */
#define BUS_TYPE_PCI 1
/** ISAPnP bus type */
#define BUS_TYPE_ISAPNP 2
/** EISA bus type */
#define BUS_TYPE_EISA 3
/** MCA bus type */
#define BUS_TYPE_MCA 4
/** ISA bus type */
#define BUS_TYPE_ISA 5
/** TAP bus type */
#define BUS_TYPE_TAP 6
/** EFI bus type */
#define BUS_TYPE_EFI 7
/** Xen bus type */
#define BUS_TYPE_XEN 8
/** A hardware device */
struct device {
/** Name */
char name[16];
/** Driver name */
const char *driver_name;
/** Device description */
struct 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 );
};
/** Root device table */
#define ROOT_DEVICES __table ( struct root_device, "root_devices" )
/** Declare a root device */
#define __root_device __table_entry ( ROOT_DEVICES, 01 )
extern int device_keep_count;
/**
* Prevent devices from being removed on shutdown
*
*/
static inline void devices_get ( void ) {
device_keep_count++;
}
/**
* Allow devices to be removed on shutdown
*
*/
static inline void devices_put ( void ) {
device_keep_count--;
}
extern struct device * identify_device ( struct interface *intf );
#define identify_device_TYPE( object_type ) \
typeof ( struct device * ( object_type ) )
#endif /* _IPXE_DEVICE_H */
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