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