MFC r283291: don't use CALLOUT_MPSAFE with callout_init()

The main purpose of this MFC is to reduce conflicts for other merges.
Parts of the original change have already "trickled down" via individual MFCs.

MFC r274821:

Merge from CheriBSD:

commit d0c7d235c09fc65dbdb278e7016a96f79c6a49cc
Make the Altera JTAG UART device driver slightly more forgiving of
the foibles of a sub-par hrdware interface by increasing the timeout
for spotting JTAG polling from one to two seconds.

commit 19ed45a18832560dab967c179d83b71081c3a220
Update comment.

commit 8edfe803f033cc8e33229f99894c2b7496a44d5f
Add a comment about a device-driver race condition that could cause the BERI
pipeline to wedge awaiting JTAG in the event that both the low-level console
and the tty layer decide to write to the JTAG FIFO just before JTAG is
disconnected. Resolving this race is a bit tricky as it looks like there
isn't a way to 'give the character back' to the tty layer when we discover
the race. The easy fix is to drop the character, which we don't yet do, but
perhaps should as that is a better outcome than wedging the pipeline.

commit 2ea26cf579c9defcf31e413e7c9b0fbc159237fc
Add a comment about an inherent race with hardware in the Altera JTAG
UART's low-level console code.

Submitted by: rwatson
Sponsored by: DARPA, AFRL

MFC r274820:

Merge from CheriBSD (2e28d2a3090239b30481f35dc452ad95a5c57389):

Remove initalized, but unused devname variable

Sponsored by: DARPA, AFRL

MFC r271679:

Merge atse(4) interrupt handling and race condition fixes from
cheribsd.

Obtained from: cheribsd
Submitted by: rwatson, emaste
Sponsored by: DARPA/AFRL
Approved by: re (delphij)

MFC r264542:

Use ETHER_ALIGN as argument to m_adj() to offset the beginning of packet
rather than the magic number 2.

While here fix a typo in a comment.

No functional changes.

Sponsored by: DARPA/AFRL

MFC r261410

Follow r261352 by updating all drivers which are children of simplebus
to check the status property in their probe routines.

MFC r257334, r257336, r257337, r257338, r257341, r257342, r257343, r257370,
r257368, r257416

Hints-only devices should return BUS_PROBE_NOWILDCARD from their probe
methods.

MFC r256752, r256946

MFP4: 221483, 221567, 221568, 221670, 221677, 221678, 221800, 221801,
221804, 221805, 222004, 222006, 222055, 222820, 1135077, 1135118,
1136259

Add atse(4), a driver for the Altera Triple Speed Ethernet MegaCore.

The current driver support gigabit Ethernet speeds only and works with
the MegaCore only in the internal FIFO configuration in the soon to be
open sourced BERI CPU configuration.

MFP4: 1187103, 222076, 222057, 222051, 221799

Add atsectl, a simple utility to read and update MAC addresses stored in

the default flash location on Altera DE4 boards. Typically used once
when setting up a board so leaving in tools rather than inflicting on
all users.

To build with world add LOCAL_DIRS=tools/tools/atsectl to the make
command line.

Submitted by: bz
Sponsored by: DARPA/AFRL
Approved by: re (glebius)

MFC: r256743, r256744
MFP4:
Change 227594 by brooks@brooks_zenith on 2013/04/11 17:10:14

When we fail, print the error that occurred if we are giving
up or if bootverbose is set.

MFP4 (driver change only):
Change 231100 by brooks@brooks_zenith on 2013/07/12 21:01:31

Add a new option ALTERA_SDCARD_FAST_SIM which checks immediately
for success of I/O operations rather than queuing a task.

Sponsored by: DARPA/AFRL
Approved by: re (glebius)

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Partial MFC of change 228122:

Due to the requirement that tty prefixes be unique per driver, rename
the Altera JTAG UART devices to ttyj#.

Sponsored by: DARPA, AFRL

MFP4 change 219820

Add a missing 0 to the mask for byte0 of C_SIZE.

The previous mask (0xc) worked except that the last 0-1536K of the disk
could not be accessed since we were shifting the (wrong) bits we did
mask off the right edge.

MFP4 change 219819

Remove a duplicate computation of C_SIZE_MULT. Once is sufficient.

Sponsored by: DARPA, AFRL

Merge Perforce changeset 219952 to head:

Make different bus attachments for Altera and Terasice
device drivers share the same devclass_t.

Sponsored by: DARPA, AFRL

Partially merge Perforce changeset 219942 to head:

Implement an FDT attachment for altera_avgen(4).

Portions of the changeset updating DTS and device.hints will be merged
separately.

Sponsored by: DARPA, AFRL

Merge Perforce changeset 219941 to head:

Copy altera_avgen(4) nexus attachment as a starting point for an
FDT attachment.

Sponsored by: DARPA, AFRL

Merge Perforce changeset 219940 to head:

Rework altera_avgen(4) to cleanly(ish) separate nexus bus
attachment from the driver itself. This should allow us to
plug in an fdt attachment more easily.

Sponsored by: DARPA, AFRL

Merge Perforce changeset 219939 to head:

Start restructuring of altera_avgen(4) so that it can have an FDT
attachment -- this requires first properly breaking out the current
nexus attachment from the driver implementation.

Sponsored by: DARPA, AFRL

Merge Perforce changeset 219927 to head:

Implement an FDT attachment for the Altera SD Card driver

Sponsored by: DARPA, AFRL

Merge Perforce changeset 219926 to head:

Copy Altera SDCard nexus attachment as a starting point for the FDT
attachment.

Sponsored by: DARPA, AFRL

Merge Perforce changeset 219918 to head:

Naive first cut at an FDT bus attachment for the Altera JTAG UART.

Sponsored by: DARPA, AFRL

Merge Perforce changeset 219917 to head:

Copy Altera JTAG UART nexus bus attachment as a starting point
for an FDT bus attachment.

Sponsored by: DARPA, AFRL

Correct double "the the"

Approved by: cperciva
MFC after: 3 days

Add altera_jtag_uart(4), a device driver for Altera's JTAG UART soft core,
which presents a UART-like interface over the Avalon bus that can be
addressed over JTAG. This IP core proves extremely useful, allowing us to
connect trivially to the FreeBSD console over JTAG for FPGA-embedded hard
and soft cores. As interrupts are optionally configured for this soft
core, we support both interrupt-driven and polled modes of operation,
which must be selected using device.hints. UART instances appear in /dev
as ttyu0, ttyu1, etc.

However, it also contains a number of quirks, which make it difficult to
tell when JTAG is connected, and some buffering issues. We work around
these as best we can, using various heuristics.

While the majority of this device driver is not only not BERI-specific,
but also not MIPS-specific, for now add its defines in the BERI files
list, as the console-level parts are aware of where the first JTAG UART
is mapped on Avalon, and contain MIPS-specific address translation, to
use before Newbus and device.hints are available.

Sponsored by: DARPA, AFRL

Add a device driver for the Altera University Program SD Card IP Core,
which can be synthesised in Altera FPGAs. An altera_sdcardc device
probes during the boot, and /dev/altera_sdcard devices come and go as
inserted and removed. The device driver attaches directly to the
Nexus, as is common for system-on-chip device drivers.

This IP core suffers a number of significant limitations, including a
lack of interrupt-driven I/O -- we must implement timer-driven polling,
only CSD 0 cards (up to 2G) are supported, there are serious memory
access issues that require the driver to verify writes to memory-mapped
buffers, undocumented alignment requirements, and erroneous error
returns. The driver must therefore work quite hard, despite a fairly
simple hardware-software interface. The IP core also supports at most
one outstanding I/O at a time, so is not a speed demon.

However, with the above workarounds, and subject to performance
problems, it works quite reliably in practice, and we can use it for
read-write mounts of root file systems, etc.

Sponsored by: DARPA, AFRL

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