linux-hardened/Documentation/m68k
Henrik Austad 3cf8ca1c25 Documentation/: update 00-INDEX files
Some of the 00-INDEX files are somewhat outdated and some folders does
not contain 00-INDEX at all.  Only outdated (with the notably exception
of spi) indexes are touched here, the 169 folders without 00-INDEX has
not been touched.

New 00-INDEX
 - spi/* was added in a series of commits dating back to 2006

Added files (missing in (*/)00-INDEX)
 - dmatest.txt was added by commit 851b7e16a0 ("dmatest: run test via
   debugfs")
 - this_cpu_ops.txt was added by commit a1b2a555d6 ("percpu: add
   documentation on this_cpu operations")
 - ww-mutex-design.txt was added by commit 040a0a3710 ("mutex: Add
   support for wound/wait style locks")
 - bcache.txt was added by commit cafe563591 ("bcache: A block layer
   cache")
 - kernel-per-CPU-kthreads.txt was added by commit 49717cb404
   ("kthread: Document ways of reducing OS jitter due to per-CPU
   kthreads")
 - phy.txt was added by commit ff76496347 ("drivers: phy: add generic
   PHY framework")
 - block/null_blk was added by commit 12f8f4fc03 ("null_blk:
   documentation")
 - module-signing.txt was added by commit 3cafea3076 ("Add
   Documentation/module-signing.txt file")
 - assoc_array.txt was added by commit 3cb989501c ("Add a generic
   associative array implementation.")
 - arm/IXP4xx was part of the initial repo
 - arm/cluster-pm-race-avoidance.txt was added by commit 7fe31d28e8
   ("ARM: mcpm: introduce helpers for platform coherency exit/setup")
 - arm/firmware.txt was added by commit 7366b92a77 ("ARM: Add
   interface for registering and calling firmware-specific operations")
 - arm/kernel_mode_neon.txt was added by commit 2afd0a0524 ("ARM:
   7825/1: document the use of NEON in kernel mode")
 - arm/tcm.txt was added by commit bc581770cf ("ARM: 5580/2: ARM TCM
   (Tightly-Coupled Memory) support v3")
 - arm/vlocks.txt was added by commit 9762f12d3e ("ARM: mcpm: Add
   baremetal voting mutexes")
 - blackfin/gptimers-example.c, Makefile was added by commit
   4b60779d5e ("Blackfin: add an example showing how to use the
   gptimers API")
 - devicetree/usage-model.txt was added by commit 31134efc68 ("dt:
   Linux DT usage model documentation")
 - fb/api.txt was added by commit fb21c2f428 ("fbdev: Add FOURCC-based
   format configuration API")
 - fb/sm501.txt was added by commit e6a0498071 ("video, sm501: add
   edid and commandline support")
 - fb/udlfb.txt was added by commit 96f8d864af ("fbdev: move udlfb out
   of staging.")
 - filesystems/Makefile was added by commit 1e0051ae48
   ("Documentation/fs/: split txt and source files")
 - filesystems/nfs/nfsd-admin-interfaces.txt was added by commit
   8a4c6e19cf ("nfsd: document kernel interfaces for nfsd
   configuration")
 - ide/warm-plug-howto.txt was added by commit f74c91413e ("ide: add
   warm-plug support for IDE devices (take 2)")
 - laptops/Makefile was added by commit d49129accc
   ("Documentation/laptop/: split txt and source files")
 - leds/leds-blinkm.txt was added by commit b54cf35a7f ("LEDS: add
   BlinkM RGB LED driver, documentation and update MAINTAINERS")
 - leds/ledtrig-oneshot.txt was added by commit 5e417281cd ("leds: add
   oneshot trigger")
 - leds/ledtrig-transient.txt was added by commit 44e1e9f8e7 ("leds:
   add new transient trigger for one shot timer activation")
 - m68k/README.buddha was part of the initial repo
 - networking/LICENSE.(qla3xxx|qlcnic|qlge) was added by commits
   40839129f7, c4e84bde1d, 5a4faa8737
 - networking/Makefile was added by commit 3794f3e812 ("docsrc: build
   Documentation/ sources")
 - networking/i40evf.txt was added by commit 105bf2fe6b ("i40evf: add
   driver to kernel build system")
 - networking/ipsec.txt was added by commit b3c6efbc36 ("xfrm: Add
   file to document IPsec corner case")
 - networking/mac80211-auth-assoc-deauth.txt was added by commit
   3cd7920a2b ("mac80211: add auth/assoc/deauth flow diagram")
 - networking/netlink_mmap.txt was added by commit 5683264c39
   ("netlink: add documentation for memory mapped I/O")
 - networking/nf_conntrack-sysctl.txt was added by commit c9f9e0e159
   ("netfilter: doc: add nf_conntrack sysctl api documentation") lan)
 - networking/team.txt was added by commit 3d249d4ca7 ("net: introduce
   ethernet teaming device")
 - networking/vxlan.txt was added by commit d342894c5d ("vxlan:
   virtual extensible lan")
 - power/runtime_pm.txt was added by commit 5e928f77a0 ("PM: Introduce
   core framework for run-time PM of I/O devices (rev.  17)")
 - power/charger-manager.txt was added by commit 3bb3dbbd56
   ("power_supply: Add initial Charger-Manager driver")
 - RCU/lockdep-splat.txt was added by commit d7bd2d68aa ("rcu:
   Document interpretation of RCU-lockdep splats")
 - s390/kvm.txt was added by 5ecee4b (KVM: s390: API documentation)
 - s390/qeth.txt was added by commit b4d72c08b3 ("qeth: bridgeport
   support - basic control")
 - scheduler/sched-bwc.txt was added by commit 88ebc08ea9 ("sched: Add
   documentation for bandwidth control")
 - scsi/advansys.txt was added by commit 4bd6d7f356 ("[SCSI] advansys:
   Move documentation to Documentation/scsi")
 - scsi/bfa.txt was added by commit 1ec90174bd ("[SCSI] bfa: add
   readme file")
 - scsi/bnx2fc.txt was added by commit 12b8fc10ea ("[SCSI] bnx2fc: Add
   driver documentation")
 - scsi/cxgb3i.txt was added by commit c3673464eb ("[SCSI] cxgb3i: Add
   cxgb3i iSCSI driver.")
 - scsi/hpsa.txt was added by commit 992ebcf14f ("[SCSI] hpsa: Add
   hpsa.txt to Documentation/scsi")
 - scsi/link_power_management_policy.txt was added by commit
   ca77329fb7 ("[libata] Link power management infrastructure")
 - scsi/osd.txt was added by commit 78e0c621de ("[SCSI] osd:
   Documentation for OSD library")
 - scsi/scsi-parameter.txt was created/moved by commit 163475fb11
   ("Documentation: move SCSI parameters to their own text file")
 - serial/driver was part of the initial repo
 - serial/n_gsm.txt was added by commit 323e84122e ("n_gsm: add a
   documentation")
 - timers/Makefile was added by commit 3794f3e812 ("docsrc: build
   Documentation/ sources")
 - virt/kvm/s390.txt was added by commit d9101fca3d ("KVM: s390:
   diagnose call documentation")
 - vm/split_page_table_lock was added by commit 49076ec2cc ("mm:
   dynamically allocate page->ptl if it cannot be embedded to struct
   page")
 - w1/slaves/w1_ds28e04 was added by commit fbf7f7b4e2 ("w1: Add
   1-wire slave device driver for DS28E04-100")
 - w1/masters/omap-hdq was added by commit e0a29382c6 ("hdq:
   documentation for OMAP HDQ")
 - x86/early-microcode.txt was added by commit 0d91ea86a8 ("x86, doc:
   Documentation for early microcode loading")
 - x86/earlyprintk.txt was added by commit a1aade4788 ("x86/doc:
   mini-howto for using earlyprintk=dbgp")
 - x86/entry_64.txt was added by commit 8b4777a4b5 ("x86-64: Document
   some of entry_64.S")
 - x86/pat.txt was added by commit d27554d874 ("x86: PAT
   documentation")

Moved files
 - arm/kernel_user_helpers.txt was moved out of arch/arm/kernel by
   commit 37b8304642 ("ARM: kuser: move interface documentation out of
   the source code")
 - efi-stub.txt was moved out of x86/ and down into Documentation/ in
   commit 4172fe2f8a ("EFI stub documentation updates")
 - laptops/hpfall.c was moved out of hwmon/ and into laptops/ in commit
   efcfed9bad ("Move hp_accel to drivers/platform/x86")
 - commit 5616c23ad9 ("x86: doc: move x86-generic documentation from
   Doc/x86/i386"):
   * x86/usb-legacy-support.txt
   * x86/boot.txt
   * x86/zero_page.txt
 - power/video_extension.txt was moved to acpi in commit 70e66e4df1
   ("ACPI / video: move video_extension.txt to Documentation/acpi")

Removed files (left in 00-INDEX)
 - memory.txt was removed by commit 00ea8990aa ("memory.txt: remove
   stray information")
 - gpio.txt was moved to gpio/ in commit fd8e198cfc ("Documentation:
   gpiolib: document new interface")
 - networking/DLINK.txt was removed by commit 168e06ae26
   ("drivers/net: delete old parallel port de600/de620 drivers")
 - serial/hayes-esp.txt was removed by commit f53a2ade0b ("tty: esp:
   remove broken driver")
 - s390/TAPE was removed by commit 9e280f6693 ("[S390] remove tape
   block docu")
 - vm/locking was removed by commit 57ea8171d2 ("mm: documentation:
   remove hopelessly out-of-date locking doc")
 - laptops/acer-wmi.txt was remvoed by commit 020036678e ("acer-wmi:
   Delete out-of-date documentation")

Typos/misc issues
 - rpc-server-gss.txt was added as knfsd-rpcgss.txt in commit
   030d794bf4 ("SUNRPC: Use gssproxy upcall for server RPCGSS
   authentication.")
 - commit b88cf73d92 ("net: add missing entries to
   Documentation/networking/00-INDEX")
   * generic-hdlc.txt was added as generic_hdlc.txt
   * spider_net.txt was added as spider-net.txt
 - w1/master/mxc-w1 was added as mxc_w1 by commit a5fd9139f7 ("w1: add
   1-wire master driver for i.MX27 / i.MX31")
 - s390/zfcpdump.txt was added as zfcpdump by commit 6920c12a40
   ("[S390] Add Documentation/s390/00-INDEX.")

Signed-off-by: Henrik Austad <henrik@austad.us>
Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>	[rcu bits]
Acked-by: Rob Landley <rob@landley.net>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: David S. Miller <davem@davemloft.net>
Cc: Mark Brown <broonie@kernel.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Gleb Natapov <gleb@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Len Brown <len.brown@intel.com>
Cc: James Bottomley <JBottomley@parallels.com>
Cc: Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-02-10 16:01:40 -08:00
..
00-INDEX Documentation/: update 00-INDEX files 2014-02-10 16:01:40 -08:00
kernel-options.txt block: remove refs to XD disks from documentation 2013-05-17 15:17:12 +02:00
README.buddha

The Amiga Buddha and Catweasel IDE Driver (part of ide.c) was written by
Geert Uytterhoeven based on the following specifications:

------------------------------------------------------------------------

Register map of the Buddha IDE controller and the
Buddha-part of the Catweasel Zorro-II version

The Autoconfiguration has been implemented just as Commodore
described  in  their  manuals, no tricks have been used (for
example leaving some address lines out of the equations...).
If you want to configure the board yourself (for example let
a  Linux  kernel  configure the card), look at the Commodore
Docs.  Reading the nibbles should give this information:

Vendor number: 4626 ($1212)
product number: 0 (42 for Catweasel Z-II)
Serial number: 0
Rom-vector: $1000

The  card  should be a Z-II board, size 64K, not for freemem
list, Rom-Vektor is valid, no second Autoconfig-board on the
same card, no space preference, supports "Shutup_forever".

Setting  the  base address should be done in two steps, just
as  the Amiga Kickstart does:  The lower nibble of the 8-Bit
address is written to $4a, then the whole Byte is written to
$48, while it doesn't matter how often you're writing to $4a
as  long as $48 is not touched.  After $48 has been written,
the  whole card disappears from $e8 and is mapped to the new
address just written.  Make sure $4a is written before $48,
otherwise your chance is only 1:16 to find the board :-).

The local memory-map is even active when mapped to $e8:

$0-$7e		Autokonfig-space, see Z-II docs.

$80-$7fd	reserved

$7fe		Speed-select Register: Read & Write
		(description see further down)

$800-$8ff	IDE-Select 0 (Port 0, Register set 0)

$900-$9ff	IDE-Select 1 (Port 0, Register set 1)

$a00-$aff	IDE-Select 2 (Port 1, Register set 0)

$b00-$bff	IDE-Select 3 (Port 1, Register set 1)

$c00-$cff	IDE-Select 4 (Port 2, Register set 0,
                          Catweasel only!)

$d00-$dff	IDE-Select 5 (Port 3, Register set 1,
			      Catweasel only!)

$e00-$eff	local expansion port, on Catweasel Z-II the 
		Catweasel registers are also mapped here.
		Never touch, use multidisk.device!
		
$f00		read only, Byte-access: Bit 7 shows the 
		level of the IRQ-line of IDE port 0. 

$f01-$f3f	mirror of $f00

$f40		read only, Byte-access: Bit 7 shows the 
		level of the IRQ-line of IDE port 1. 

$f41-$f7f	mirror of $f40

$f80		read only, Byte-access: Bit 7 shows the 
		level of the IRQ-line of IDE port 2. 
		(Catweasel only!)

$f81-$fbf	mirror of $f80

$fc0		write-only: Writing any value to this
		register enables IRQs to be passed from the 
		IDE ports to the Zorro bus. This mechanism 
		has been implemented to be compatible with 
		harddisks that are either defective or have
		a buggy firmware and pull the IRQ line up 
		while starting up. If interrupts would 
		always be passed to the bus, the computer 
		might not start up. Once enabled, this flag 
		can not be disabled again. The level of the 
		flag can not be determined by software 
		(what for? Write to me if it's necessary!).

$fc1-$fff	mirror of $fc0

$1000-$ffff	Buddha-Rom with offset $1000 in the rom
		chip. The addresses $0 to $fff of the rom 
		chip cannot be read. Rom is Byte-wide and
		mapped to even addresses.

The  IDE ports issue an INT2.  You can read the level of the
IRQ-lines  of  the  IDE-ports by reading from the three (two
for  Buddha-only)  registers  $f00, $f40 and $f80.  This way
more  than one I/O request can be handled and you can easily
determine  what  driver  has  to serve the INT2.  Buddha and
Catweasel  expansion  boards  can issue an INT6.  A separate
memory  map  is available for the I/O module and the sysop's
I/O module.

The IDE ports are fed by the address lines A2 to A4, just as
the  Amiga  1200  and  Amiga  4000  IDE ports are.  This way
existing  drivers  can be easily ported to Buddha.  A move.l
polls  two  words  out of the same address of IDE port since
every  word  is  mirrored  once.  movem is not possible, but
it's  not  necessary  either,  because  you can only speedup
68000  systems  with  this  technique.   A 68020 system with
fastmem is faster with move.l.

If you're using the mirrored registers of the IDE-ports with
A6=1,  the Buddha doesn't care about the speed that you have
selected  in  the  speed  register (see further down).  With
A6=1  (for example $840 for port 0, register set 0), a 780ns
access  is being made.  These registers should be used for a
command   access   to  the  harddisk/CD-Rom,  since  command
accesses  are Byte-wide and have to be made slower according
to the ATA-X3T9 manual.

Now  for the speed-register:  The register is byte-wide, and
only  the  upper  three  bits are used (Bits 7 to 5).  Bit 4
must  always  be set to 1 to be compatible with later Buddha
versions  (if  I'll  ever  update this one).  I presume that
I'll  never use the lower four bits, but they have to be set
to 1 by definition.
  The  values in this table have to be shifted 5 bits to the
left and or'd with $1f (this sets the lower 5 bits).

All  the timings have in common:  Select and IOR/IOW rise at
the  same  time.   IOR  and  IOW have a propagation delay of
about  30ns  to  the clocks on the Zorro bus, that's why the
values  are no multiple of 71.  One clock-cycle is 71ns long
(exactly 70,5 at 14,18 Mhz on PAL systems).

value 0 (Default after reset)

497ns Select (7 clock cycles) , IOR/IOW after 172ns (2 clock cycles)
(same timing as the Amiga 1200 does on it's IDE port without
accelerator card)

value 1

639ns Select (9 clock cycles), IOR/IOW after 243ns (3 clock cycles)

value 2

781ns Select (11 clock cycles), IOR/IOW after 314ns (4 clock cycles)

value 3

355ns Select (5 clock cycles), IOR/IOW after 101ns (1 clock cycle)

value 4

355ns Select (5 clock cycles), IOR/IOW after 172ns (2 clock cycles)

value 5

355ns Select (5 clock cycles), IOR/IOW after 243ns (3 clock cycles)

value 6

1065ns Select (15 clock cycles), IOR/IOW after 314ns (4 clock cycles)

value 7

355ns Select, (5 clock cycles), IOR/IOW after 101ns (1 clock cycle)

When accessing IDE registers with A6=1 (for example $84x),
the timing will always be mode 0 8-bit compatible, no matter
what you have selected in the speed register:

781ns select, IOR/IOW after 4 clock cycles (=314ns) aktive. 

All  the  timings with a very short select-signal (the 355ns
fast  accesses)  depend  on the accelerator card used in the
system:  Sometimes two more clock cycles are inserted by the
bus  interface,  making  the  whole access 497ns long.  This
doesn't  affect  the  reliability  of the controller nor the
performance  of  the  card,  since  this doesn't happen very
often.

All  the  timings  are  calculated  and  only  confirmed  by
measurements  that allowed me to count the clock cycles.  If
the  system  is clocked by an oscillator other than 28,37516
Mhz  (for  example  the  NTSC-frequency  28,63636 Mhz), each
clock  cycle is shortened to a bit less than 70ns (not worth
mentioning).   You  could think of a small performance boost
by  overclocking  the  system,  but  you would either need a
multisync  monitor,  or  a  graphics card, and your internal
diskdrive would go crazy, that's why you shouldn't tune your
Amiga this way.

Giving  you  the  possibility  to  write  software  that  is
compatible  with both the Buddha and the Catweasel Z-II, The
Buddha  acts  just  like  a  Catweasel  Z-II  with no device
connected  to  the  third  IDE-port.   The IRQ-register $f80
always  shows a "no IRQ here" on the Buddha, and accesses to
the  third  IDE  port  are  going into data's Nirwana on the
Buddha.

			    Jens Schönfeld february 19th, 1997
					updated may 27th, 1997
			     eMail: sysop@nostlgic.tng.oche.de