Commit Graph

11915 Commits

Author SHA1 Message Date
David Gibson
e58923ed14 [POWERPC] Add arch/powerpc driver for UIC, PPC4xx interrupt controller
This patch adds a driver to arch/powerpc/sysdev for the UIC, the
on-chip interrupt controller from IBM/AMCC 4xx chips.  It uses the new
irq host mapping infrastructure.

Signed-off-by: David Gibson <dwg@au1.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-24 21:32:01 +10:00
David Gibson
f65573314e [POWERPC] Re-organize Kconfig code for 4xx in arch/powerpc
Now that we always take a device tree in arch/powerpc, there's no good
reason not to allow a single kernel to support multiple embedded 4xx
boards - the correct platform code can be selected based on the device
tree information.

Therefore, this patch re-arranges the 4xx Kconfig code to allow this.
In addition we:
	- use "select" instead of depends to configure the correct
	  config options for specific 4xx CPUs and workarounds, which
	  makes the information about specific boards and CPUs less
	  scattered.
	- Some old, unused (in arch/powerpc) config options are
	  removed: WANT_EARLY_SERIAL, IBM_OCP, etc.

Signed-off-by: David Gibson <dwg@au1.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-24 21:32:00 +10:00
Ananth N Mavinakayanahalli
e6349a958b [POWERPC] kprobes: Eliminate sstep exception if instruction can be emulated
For cases when probes are placed on instructions that can be emulated,
don't take the single-step exception.

Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-24 21:31:58 +10:00
Ananth N Mavinakayanahalli
6888199f7f [POWERPC] Emulate more instructions in software
Emulate a few more instructions in software - especially useful during
singlestepping (xmon/kprobes).

Instructions emulated with this patch are mfcr/mtcr rX, mfxer/mtxer rX,
mflr/mtlr rX, mfctr/mtctr rX and mr rA,rB.

Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-24 21:31:57 +10:00
Scott Wood
5cc5133a29 [POWERPC] bootwrapper: cuboot for 83xx
This adds cuboot support for MPC83xx platforms.

A device tree used with this must have linux,stdout-path in /chosen and
linux,network-index in any network device nodes that need mac addresses
assigned.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-24 21:31:56 +10:00
Scott Wood
9b1c59e256 [POWERPC] bootwrapper: Add ppcboot.h
This file describes the bd_t struct, which is used by old versions of
U-boot to pass information to the kernel.  Platform code that needs to
interoperate with such firmware can use this; it should not be used for
anything new.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-24 21:31:55 +10:00
Scott Wood
0fdd717ed4 [POWERPC] bootwrapper: Add a cuboot platform and a cuImage target
The cuImage target will build a uImage with bootwrapper code and a device
tree.  The default device tree and platform file are determined by the
kernel configuration.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-24 21:31:54 +10:00
Scott Wood
270429baa9 [POWERPC] bootwrapper: Add CONFIG_DEVICE_TREE
This provides a way to tell the bootwrapper makefile which device tree to
include by default.  The wrapper can still be invoked standalone to wrap
with a different device tree without reconfiguring the kernel, if that is
desired.

The user will only be asked to provide a device tree if the platform
selects CONFIG_WANT_DEVICE_TREE.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-24 21:31:53 +10:00
Olof Johansson
b97d279143 [POWERPC] pasemi: GPIO MDIO of_platform driver
MDIO driver for PHY's connected via GPIO as on the PA Semi Electra
eval board.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-24 21:31:52 +10:00
Olof Johansson
25fc530eed [POWERPC] pasemi: PA6T oprofile support
Oprofile support for PA6T, kernel side.

Also rename the PA6T_SPRN.* defines to SPRN_PA6T.*.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-24 21:31:51 +10:00
Olof Johansson
7e8bddf566 [POWERPC] pasemi: Reset mpic on boot
Reset MPIC on boot to clear some timer state that firmware might
leave configured.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-24 21:31:50 +10:00
Olof Johansson
62357d8215 [POWERPC] pasemi: Enable one more hid bit
Minor HID change. Firmware can't know that we want this set so we have
to set it in the kernel.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-24 21:31:49 +10:00
Olof Johansson
df7e70a2b0 [POWERPC] pasemi: Allow 8KB config space for I/O bridge
Device 0 function 0 on the root bus is really a two-function bus agent,
but only the first function is visible. Because of this, we need to
allow config accesses into the second range. Modify the check for valid
offsets accordingly.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-24 21:31:48 +10:00
Josh Boyer
a14c4508f4 [POWERPC] Fix PowerPC 750CL and 750GX CPU features
PowerPC 750CL has high BATs.  The patch below adds a CPU_FTRS_750CL that
includes that.  Without it, the original firmware mappings in the high BATs
aren't cleared which continue to override the linux translations.

It also adds CPU_FTR_COMMON to CPU_FTRS_750GX for completeness.

Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-24 21:31:47 +10:00
Stephen Rothwell
b3a6d2a54b [POWERPC] Rename last get_property calls
These got added recently.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-24 21:31:40 +10:00
Paul Mackerras
b142eb3a5a Merge branch 'for-2.6.22' of master.kernel.org:/pub/scm/linux/kernel/git/arnd/cell-2.6 into for-2.6.22 2007-04-24 11:46:09 +10:00
Paul Mackerras
13177c8b7e Merge branch 'spufs' of master.kernel.org:/pub/scm/linux/kernel/git/arnd/cell-2.6 into for-2.6.22 2007-04-24 11:45:03 +10:00
Paul Mackerras
445c9b5507 Merge branch 'kconfig' of master.kernel.org:/pub/scm/linux/kernel/git/galak/powerpc into for-2.6.22 2007-04-24 08:42:11 +10:00
Arnd Bergmann
c6d344819e [POWERPC] update cell_defconfig
Sync with the Kconfig changes, and enable some options for celleb

Cc: Ishizaki Kou <kou.ishizaki@toshiba.co.jp>
Signed-off-by: Jens Osterkamp <jens@de.ibm.com>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
2007-04-23 21:44:41 +02:00
Jeremy Kerr
150f7e3cfe [POWERPC] cell: enable RTAS-based PTCAL for Cell XDR memory
Enable Periodic Recalibration (PTCAL) support for Cell XDR memory,
using the new ibm,cbe-start-ptcal and ibm,cbe-stop-ptcal RTAS calls.

Tested on QS20 and QS21 (by Thomas Huth). It seems that SLOF has
problems disabling, at least on QS20; this patch should only be
used once these problems have been addressed.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
2007-04-23 21:44:41 +02:00
Christian Krafft
9dd855a729 [POWERPC] cell: add support for proper device-tree
This patch adds support for a proper device-tree.
A porper device-tree on cell contains be nodes
for each CBE containg nodes for SPEs and all the
other special devices on it.
Ofcourse oldschool devicetree is still supported.

Signed-off-by: Christian Krafft <krafft@de.ibm.com>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
2007-04-23 21:44:40 +02:00
Christian Krafft
6bf05fd776 [POWERPC] add of_iomap function
The of_iomap function maps memory for a given
device_node and returns a pointer to that memory.
This is used at some places, so it makes sense to
a seperate function.

Signed-off-by: Christian Krafft <krafft@de.ibm.com>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
2007-04-23 21:44:40 +02:00
Christian Krafft
4a065f9418 [POWERPC] pmi probe device by device-type
At the moment the pmi device driver is probing for devices with
a given type and a given name. As there may be devices of
the same type but with a different name, probing should be
done also for device type only.

Signed-off-by: Christian Krafft <krafft@de.ibm.com>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
2007-04-23 21:44:40 +02:00
Christian Krafft
79baf4a60e [POWERPC] add check for initialized driver data to pmi driver
This patch adds a check for the private driver data to be initialized.
The bug showed up, as the caller found a pmi device by it's type.
Whereas the pmi driver probes for the type and the name.
Since the name was not as the driver expected, it did not initialize.
A more relaxed probing will be supplied with an extra patch, too.

Signed-off-by: Christian Krafft <krafft@de.ibm.com>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
2007-04-23 21:44:40 +02:00
Christian Krafft
5050063c04 [POWERPC] cell: use pmi in cpufreq driver
The new PMI driver was added in order to support
cpufreq on blades that require the frequency to
be controlled by the service processor, so use it
on those.

Signed-off-by: Christian Krafft <krafft@de.ibm.com>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
2007-04-23 21:44:39 +02:00
Christian Krafft
5f7bdaee2a [POWERPC] cbe_thermal: add throttling attributes to cpu and spu nodes
This patch adds some attributes the cpu and spu nodes:
/sys/devices/system/[c|s]pu/[c|s]pu*/thermal/throttle_begin
/sys/devices/system/[c|s]pu/[c|s]pu*/thermal/throttle_end
/sys/devices/system/[c|s]pu/[c|s]pu*/thermal/throttle_full_stop

Signed-off-by: Christian Krafft <krafft@de.ibm.com>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
2007-04-23 21:44:39 +02:00
Christian Krafft
24d560d7b9 [POWERPC] cbe_thermal: clean up computation of temperature
This patch introduces a little function for transforming
register values into temperature.

Signed-off-by: Christian Krafft <krafft@de.ibm.com>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
2007-04-23 21:44:39 +02:00
Christian Krafft
91a69c9646 [POWERPC] cell: add cbe_node_to_cpu function
This patch adds code to deal with conversion of
logical cpu to cbe nodes. It removes code that
assummed there were two logical CPUs per CBE.

Signed-off-by: Christian Krafft <krafft@de.ibm.com>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
2007-04-23 21:44:38 +02:00
Jeremy Kerr
ccf17e9d00 [POWERPC] spu_base: fix initialisation on systems with no SPEs
This change fixes the case where spu_base and spufs are initialised on a
system with no SPEs - unconditionally create the spu_lists so spu_alloc
doesn't explode, and check for spu_management ops before starting spufs.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>

 arch/powerpc/platforms/cell/spu_base.c    |    7 ++++---
 arch/powerpc/platforms/cell/spufs/inode.c |    5 +++++
 2 files changed, 9 insertions(+), 3 deletions(-)
2007-04-23 21:19:00 +02:00
Christoph Hellwig
befdc746ee [POWERPC] spu_base: remove cleanup_spu_base
spu_base.c is always built into the kernel image, so there is no need
for a cleanup function.  And some of the things it does are in the
way for my following patches, so I'd rather get rid of it ASAP.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
2007-04-23 21:18:59 +02:00
Christoph Hellwig
aa45e2569f [POWERPC] spufs: various run.c cleanups
- remove the spu_acquire_runnable from spu_run_init.  I need to
   opencode it in spufs_run_spu in the next patch
 - remove various inline attributes, we don't really want to inline
   long functions with multiple callsites
 - cleanup return values and runcntl_write calls in spu_run_init
 - use normal kernel codingstyle in spu_reacquire_runnable

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
2007-04-23 21:18:59 +02:00
Akinobu Mita
fe8a29db5b [POWERPC] spufs: enable SPU coredump for kernel-builtin spufs
spu_coredump_calls.owner is NULL in case of a builtin spufs,
so the checks in here break.
Check for the availability of the spu_coredump_calls variable
instead.

Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
2007-04-23 21:18:59 +02:00
Arnd Bergmann
6cf2179202 [POWERPC] spufs: fix memory leak on coredump
Dynamically allocated read/write buffer in spufs_arch_write_note() will
not be freed. Convert it to get_free_page at the same time.

Cc: Akinobu Mita <mita@fixstars.com>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
2007-04-23 21:18:58 +02:00
Jeremy Kerr
d3764397d0 [POWERPC] spufs: Minor cleanup of spu_wait
Change the loop in spu_wait to be a little more straightforward.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
2007-04-23 21:18:58 +02:00
Jeremy Kerr
f11f5ee70f [POWERPC] spufs: add mode= mount option
Add a 'mode=' option to spufs mount arguments. This allows more
control over access to the top-level spufs directory.

Tested on Cell.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
2007-04-23 21:18:58 +02:00
Akinobu Mita
9e2fe2ce4e [POWERPC] spufs: use memcpy_fromio() to copy from local store
GCC may generates inline copy loop to handle memcpy() function
instead of kernel defined memcpy(). But this inlined version of memcpy()
causes an alignment interrupt when copying from local store.

This patch uses memcpy_fromio() and memcpy_toio to copy local store
to prevent memcpy() being inlined.

Signed-off-by: Akinobu Mita <mita@fixstars.com>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
2007-04-23 21:18:57 +02:00
Christoph Hellwig
8a7d86bdb2 [POWERPC] spufs: avoid spurious memory barriers
We now have proper locking around assignets of the mapping pointers,
and the spin_unlock implies enough of a barrier to get rid of the
explicit one.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
2007-04-23 21:18:57 +02:00
Akinobu Mita
db1384b40d [POWERPC] spufs: fix memory leak on spufs reloading
When SPU isolation mode enabled, isolated_loader would be
allocated by spufs_init_isolated_loader() on module_init().
But anyone do not free it.

This patch introduces spufs_exit_isolated_loader() which is
the opposite of spufs_init_isolated_loader() and called on
module_exit().

Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Akinobu Mita <mita@fixstars.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
2007-04-23 21:18:57 +02:00
Akinobu Mita
c99c1994a2 [POWERPC] spufs: fix missing error handling in module_init()
spufs module_init forgot to call a few cleanup functions
on error path. This patch also includes cosmetic changes in
spu_sched_init() (identation fix and return error code).

[modified by hch to apply ontop of the latest schedule changes]

Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Akinobu Mita <mita@fixstars.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
2007-04-23 21:18:56 +02:00
Akinobu Mita
577f8f1021 [POWERPC] spufs: check spu_acquire_runnable() return value
This patch checks return value of spu_acquire_runnable() in
spufs_mfc_write().

Signed-off-by: Akinobu Mita <mita@fixstars.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
2007-04-23 21:18:56 +02:00
Christoph Hellwig
e45d48a34d [POWERPC] spufs: turn run_sema into run_mutex
There is no reason for run_sema to be a struct semaphore.  Changing
it to a mutex and rename it accordingly.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
2007-04-23 21:18:56 +02:00
Jeremy Kerr
c8a1e9393a [POWERPC] spufs: provide siginfo for SPE faults
This change populates a siginfo struct for SPE application exceptions
(ie, invalid DMAs and illegal instructions).

Tested on an IBM Cell Blade.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
2007-04-23 21:18:55 +02:00
Arnd Bergmann
57dace2391 [POWERPC] spufs: make spu page faults not block scheduling
Until now, we have always entered the spu page fault handler
with a mutex for the spu context held. This has multiple
bad side-effects:
- it becomes impossible to suspend the context during
  page faults
- if an spu program attempts to access its own mmio
  areas through DMA, we get an immediate livelock when
  the nopage function tries to acquire the same mutex

This patch makes the page fault logic operate on a
struct spu_context instead of a struct spu, and moves it
from spu_base.c to a new file fault.c inside of spufs.

We now also need to copy the dar and dsisr contents
of the last fault into the saved context to have it
accessible in case we schedule out the context before
activating the page fault handler.

Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
2007-04-23 21:18:55 +02:00
Christoph Hellwig
62c05d583e [POWERPC] spu_base: move spu_init_channels out of spu_mutex
There is no reason to execute spu_init_channels under spu_mutex
after the spu has been taken off the freelist it's ours.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
2007-04-23 21:18:55 +02:00
Luke Browning
4e0f4ed0df [POWERPC] spu sched: make addition to stop_wq and runque atomic vs wakeup
Addition to stop_wq needs to happen before adding to the runqeueue and
under the same lock so that we don't have a race window for a lost
wake up in the spu scheduler.

Signed-off-by: Luke Browning <lukebrowning@us.ibm.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
2007-04-23 21:18:55 +02:00
Christoph Hellwig
7ec18ab923 [POWERPC] spufs: streamline locking for isolated spu setup
For quite a while now spu state is protected by a simple mutex instead
of the old rw_semaphore, and this means we can simplify the locking
around spu_setup_isolated a lot.

Instead of doing an spu_release before entering spu_setup_isolated and
then calling the complicated spu_acquire_exclusive we can now simply
enter the function locked an in guaranteed runnable state, so that the
only bit of spu_acquire_exclusive that's left is the call to
spu_unmap_mappings.

Similarly there's no more need to unlock and reacquire the state_mutex
when spu_setup_isolated is done, but we can always return with the
lock held and only drop it in spu_run_init in the failure case.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
2007-04-23 21:18:54 +02:00
Christoph Hellwig
a475c2f435 [POWERPC] spufs: remove woken threads from the runqueue early
A single context should only be woken once, and we should not have
more wakeups for a given priority than the number of contexts on
that runqueue position.

Also add some asserts to trap future problems in this area more
easily.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
2007-04-23 21:18:54 +02:00
Arnd Bergmann
390c534304 [POWERPC] spufs: add memory barriers after set_bit
set_bit does not guarantee ordering on powerpc, so using it
for communication between threads requires explicit
mb() calls.

Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
2007-04-23 21:18:54 +02:00
Christoph Hellwig
e097b51328 [POWERPC] spu sched: ensure preempted threads are put back on the runqueue, part2
To not lose a spu thread we need to make sure it always gets put back
on the runqueue.  In find_victim aswell as in the scheduler tick as done
in the previous patch.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
2007-04-23 21:18:53 +02:00
Christoph Hellwig
b3e76cc324 [POWERPC] spu sched: ensure preempted threads are put back on the runqueue
To not lose a spu thread we need to make sure it always gets put back
on the runqueue.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
2007-04-23 21:18:53 +02:00