DragonFly On-Line Manual Pages

BUS_GET_RESOURCE(9)   DragonFly Kernel Developer's Manual  BUS_GET_RESOURCE(9)

NAME
     bus_get_resource -- read a resource range/value with a given resource ID

SYNOPSIS
     #include <sys/param.h>
     #include <sys/bus.h>
     #include <sys/rman.h>

     int
     bus_get_resource(device_t dev, int type, int rid, u_long *startp,
         u_long *countp);

DESCRIPTION
     The bus_get_resource() function reads the range or value of the resource
     type, rid pair and stores it in the startp and countp arguments.

     The arguments are as follows:

     dev     The device to read the resource from.

     type    The type of resource you want to read.  It is one of:

             SYS_RES_IRQ     for IRQs
             SYS_RES_DRQ     for ISA DMA lines
             SYS_RES_MEMORY  for I/O memory
             SYS_RES_IOPORT  for I/O ports

     rid     A bus-specific handle that identifies the resource being read.

     startp  A pointer to the start address of this resource.

     countp  A pointer to the length of the resource.  For example, the size
             of the memory in bytes.

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

SEE ALSO
     bus_set_resource(9), device(9), driver(9)

DragonFly 3.5                  November 9, 2008                  DragonFly 3.5