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Command: bus_get_resource | Section: 9 | Source: FreeBSD | File: bus_get_resource.9.gz
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 14.1-RELEASE-p8 September 26, 2015 FreeBSD 14.1-RELEASE-p8