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
Fo bus_activate_resource
Fa device_t dev int type int rid struct resource *r
Fc Ft int
Fo bus_deactivate_resource
Fa device_t dev int type int rid struct resource *r
Fc
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:
Fa dev
The device that requests ownership of the resource.
Before allocation, the resource is owned by the parent bus.
Fa 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
Fa rid
A pointer to a bus specific handle that identifies the resource being allocated.
Fa r
A pointer to the
Vt struct resource
returned by
bus_alloc_resource9.
RETURN VALUES
Zero is returned on success, otherwise an error is returned.
