BUS_ACTIVATE_RESOUR... FreeBSD Kernel Developer's ManualBUS_ACTIVATE_RESOUR...

NAME    [Toc]    [Back]

     bus_activate_resource, bus_deactivate_resource -- activate or deactivate
     a resource

SYNOPSIS    [Toc]    [Back]

     #include <sys/param.h>
     #include <sys/bus.h>

     #include <machine/bus.h>
     #include <sys/rman.h>
     #include <machine/resource.h>

     int
     bus_activate_resource(device_t dev, int type, int rid,
	 struct resource *r);

     int
     bus_deactivate_resource(device_t dev, int type, int rid,
	 struct resource *r);

DESCRIPTION    [Toc]    [Back]

     These functions activate or deactivate a previously allocated resource.
     In general, resources must be activated before they can be accessed by
     the driver so that the bus driver can map the resource into the devices
     space.

     The arguments are as follows:

     dev     The device that requests ownership of the resource.  Before allocation,
 the resource is owned by the parent bus.

     type    The type of resource you want to allocate.  It is one of:

	     SYS_RES_IRQ     for IRQs
	     SYS_RES_DRQ     for ISA DMA lines
	     SYS_RES_IOPORT  for I/O ports
	     SYS_RES_MEMORY  for I/O memory

     rid     A pointer to a bus specific handle that identifies the resource
	     being allocated.

     r	     A pointer to the struct resource returned by
	     bus_alloc_resource(9).

RETURN VALUES    [Toc]    [Back]

     Zero is returned on success, otherwise an error is returned.

SEE ALSO    [Toc]    [Back]

     bus_alloc_resource(9), device(9), driver(9)

AUTHORS    [Toc]    [Back]

     This manual page was written by Warner Losh <[email protected]>.


FreeBSD 5.2.1			March 28, 2003			 FreeBSD 5.2.1