bus_get_resource (9)

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(The comments found at the beginning of the groff file "man9/bus_get_resource.9freebsd".)

NAME

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

SYNOPSIS

In sys/param.h In sys/bus.h In sys/rman.h Ft int Fo bus_get_resource Fa device_t dev int type int rid rman_res_t *startp rman_res_t *countp Fc

DESCRIPTION

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

The arguments are as follows:

Fa dev

The device to read the resource from.

Fa 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

Fa rid

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

Fa startp

A pointer to the start address of this resource.

Fa 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_resource9, device(9), driver(9)

AUTHORS

This manual page was written by An Sascha Wildner .