Add altera_avgen(4), a generic device driver to be used by hard and soft

CPU cores on Altera FPGAs.  The device driver allows memory-mapped devices
on Altera's Avalon SoC bus to be exported to userspace via device nodes.
device.hints directories dictate device name, permissible access methods,
physical address and length, and I/O alignment.  Devices can be accessed
using read(2)/write(2), but also memory mapped in userspace using mmap(2).

Devices attach directly to the Nexus, as is common for embedded device
drivers; in the future something more mature might be desirable.  There is
currently no facility to support directing device-originated interrupts to
userspace.

In the future, this device driver may be renamed to socgen(4), as it can
in principle also be used with other system-on-chip (SoC) busses, such as
Axi on ASICs and FPGAs.  However, we have only tested it on Avalon busses
with memory-mapped ROMs, frame buffers, etc.

Sponsored by:	DARPA, AFRL

1 files changed, 1 insertions, 0 deletions

diff --git a/sys/conf/files b/sys/conf/files
index bcc2f7a4a084..dcc3c9a0ac63 100644
--- a/sys/conf/files
+++ b/sys/conf/files
@@ -659,6 +659,7 @@ dev/aic7xxx/aic7xxx_osm.c	optional ahc
 dev/aic7xxx/aic7xxx_pci.c	optional ahc pci
 dev/alc/if_alc.c		optional alc pci
 dev/ale/if_ale.c		optional ale pci
+dev/altera/avgen/altera_avgen.c		optional altera_avgen
 dev/amr/amr.c			optional amr
 dev/amr/amr_cam.c		optional amrp amr
 dev/amr/amr_disk.c		optional amr