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-dhahelper is small driver to provide some kernel function into userspace.
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-The main reason you need to use dhahelper is for busmastering.
-(Btw, lacking of possibility to implement conversion of
-virtual addresses into physical in userspace caused
-implementing of so-called DRM drivers for Linux from
-XFree86 side).
-Second goal (still is unfinished) - provide possibility
-to control port and physical memory access through
-groups and access rights of this driver. (Unix way).
-
-Installation:
-~~~~~~~~~~~~~
-just type in this directory:
-make all install
-
-The device node /dev/dhahelper will be created. The initial
-permissions of this node are restrictive. See below for information
-on how to make it available to non-root users.
-
-Porting:
-~~~~~~~~
-This driver was developed only for Linux.
-So if someone will port that on other unices
-then any patches are gladly accepted.
-
-WARNING:
-~~~~~~~~
-
-This driver violates some kernel security rules. To keep this driver
-from anonymous access I suggest you create a new group (e.g. dha) for
-/dev/dhahelper and set the permissions to 660 (or ug+rw,o-rw). Then
-do one of the following:
-
-- add trusted users to group dha.
-- make trusted applications SGID to dha.
-
-Good luck!