bus_activate_resource(9)

NAME

bus_activate_resource, bus_deactivate_resource - activate or

deactivate a
resource

SYNOPSIS

#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

These functions activate or deactivate a previously allocat

ed 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 allo

cation, 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

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

SEE ALSO

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

AUTHORS

This manual page was written by Warner Losh <imp@FreeB

SD.org>.

BSD March 28, 2003

BSD