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#include "etherboot.h"
#include "stddef.h"
#include "dev.h"
/*
* Each driver specifies a name, the bus-scanning function
* (find_bus_boot_device) that it wants to use, a driver information
* structure (bus_driver) containing e.g. device IDs to be passed to
* find_bus_boot_device, and a probe function (probe) to be called
* whenever a suitable device is found.
*
* The generic device-probing code knows nothing about particular bus
* types; it simply passes the driver information structure
* (bus_driver) to the bus-scanning function (find_bus_boot_device),
* then passes the result of that function (if not NULL) to the probe
* function (probe).
*/
/* Defined by linker */
extern struct boot_driver boot_drivers[];
extern struct boot_driver boot_drivers_end[];
/* Current attempted boot driver */
static struct boot_driver *boot_driver = boot_drivers;
/* Print all drivers */
void print_drivers ( void ) {
struct boot_driver *driver;
for ( driver = boot_drivers ; driver < boot_drivers_end ; driver++ ) {
printf ( "%s ", driver->name );
}
}
/* Get the next available boot device */
int find_boot_device ( struct dev *dev ) {
for ( ; boot_driver < boot_drivers_end ; boot_driver++ ) {
dev->driver = boot_driver;
dev->name = boot_driver->name;
DBG ( "Probing driver %s...\n", dev->name );
if ( boot_driver->find_bus_boot_device ( dev,
boot_driver->bus_driver ) ) {
DBG ( "Found device %s (ID %hhx:%hx:%hx)\n",
dev->name, dev->devid.bus_type,
dev->devid.vendor_id, dev->devid.device_id );
return 1;
}
}
/* No more boot devices found */
boot_driver = boot_drivers;
return 0;
}
/* Probe the boot device */
int probe ( struct dev *dev ) {
return dev->driver->probe ( dev, dev->bus );
}
/* Disable a device */
void disable ( struct dev *dev ) {
if ( dev->dev_op ) {
dev->dev_op->disable ( dev );
dev->dev_op = NULL;
}
}
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