BUS_GET_RESOURCE(9)    FreeBSD 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, rman_res_t *startp,
         rman_res_t *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)

AUTHORS
     This manual page was written by Sascha Wildner.

FreeBSD 13.1-RELEASE-p6       September 26, 2015       FreeBSD 13.1-RELEASE-p6