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>.

Debian                                           March 28, 2003                         BUS_ACTIVATE_RESOURCE(9)