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
Thebus_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
AUTHORS
This manual page was written by Sascha Wildner.