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 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
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@FreeBSD.org〉.