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⟩.
