2015-09-26 14:52:47 +00:00
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.\"
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.\" Copyright (c) 2008
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.\" $DragonFly: src/share/man/man9/bus_get_resource.9,v 1.1 2008/11/09 09:48:41 swildner Exp $
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.\" $FreeBSD$
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.\"
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.Dd September 26, 2015
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.Dt BUS_GET_RESOURCE 9
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.Os
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.Sh NAME
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.Nm bus_get_resource
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.Nd "read a resource range/value with a given resource ID"
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.Sh SYNOPSIS
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.In sys/param.h
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.In sys/bus.h
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.In sys/rman.h
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.Ft int
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.Fo bus_get_resource
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2016-01-27 02:23:54 +00:00
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.Fa "device_t dev" "int type" "int rid" "rman_res_t *startp" "rman_res_t *countp"
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2015-09-26 14:52:47 +00:00
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.Fc
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.Sh DESCRIPTION
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The
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.Fn bus_get_resource
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function reads the range or value of the resource
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.Fa type , rid
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pair and stores it in the
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.Fa startp
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and
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.Fa countp
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arguments.
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.Pp
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The arguments are as follows:
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.Bl -tag -width ".Fa startp"
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.It Fa dev
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The device to read the resource from.
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.It Fa type
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The type of resource you want to read.
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It is one of:
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.Pp
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.Bl -tag -width ".Dv SYS_RES_MEMORY" -compact
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.It Dv SYS_RES_IRQ
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for IRQs
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.It Dv SYS_RES_DRQ
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for ISA DMA lines
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.It Dv SYS_RES_MEMORY
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for I/O memory
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.It Dv SYS_RES_IOPORT
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for I/O ports
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.El
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.It Fa rid
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A bus-specific handle that identifies the resource being read.
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.It Fa startp
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A pointer to the start address of this resource.
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.It Fa countp
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A pointer to the length of the resource.
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For example, the size of the memory in bytes.
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.El
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.Sh RETURN VALUES
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Zero is returned on success, otherwise an error is returned.
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.Sh SEE ALSO
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.Xr bus_set_resource 9 ,
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.Xr device 9 ,
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.Xr driver 9
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.Sh AUTHORS
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This manual page was written by
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.An Sascha Wildner .
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