This patch reworks the way we do I and D cache coherency on PowerPC.

The "old" way was split in 3 different parts depending on the processor type:

   - Hash with per-page exec support (64-bit and >= POWER4 only) does it
at hashing time, by preventing exec on unclean pages and cleaning pages
on exec faults.

   - Everything without per-page exec support (32-bit hash, 8xx, and
64-bit < POWER4) does it for all page going to user space in update_mmu_cache().

   - Embedded with per-page exec support does it from do_page_fault() on
exec faults, in a way similar to what the hash code does.

That leads to confusion, and bugs. For example, the method using update_mmu_cache()
is racy on SMP where another processor can see the new PTE and hash it in before
we have cleaned the cache, and then blow trying to execute. This is hard to hit but
I think it has bitten us in the past.

Also, it's inefficient for embedded where we always end up having to do at least
one more page fault.

This reworks the whole thing by moving the cache sync into two main call sites,
though we keep different behaviours depending on the HW capability. The call
sites are set_pte_at() which is now made out of line, and ptep_set_access_flags()
which joins the former in pgtable.c

The base idea for Embedded with per-page exec support, is that we now do the
flush at set_pte_at() time when coming from an exec fault, which allows us
to avoid the double fault problem completely (we can even improve the situation
more by implementing TLB preload in update_mmu_cache() but that's for later).

If for some reason we didn't do it there and we try to execute, we'll hit
the page fault, which will do a minor fault, which will hit ptep_set_access_flags()
to do things like update _PAGE_ACCESSED or _PAGE_DIRTY if needed, we just make
this guys also perform the I/D cache sync for exec faults now. This second path
is the catch all for things that weren't cleaned at set_pte_at() time.

For cpus without per-pag exec support, we always do the sync at set_pte_at(),
thus guaranteeing that when the PTE is visible to other processors, the cache
is clean.

For the 64-bit hash with per-page exec support case, we keep the old mechanism
for now. I'll look into changing it later, once I've reworked a bit how we
use _PAGE_EXEC.

This is also a first step for adding _PAGE_EXEC support for embedded platforms
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

CONFIG_CC_OPTIMIZE_FOR_SIZE is selected, because otherwise the kernel
wouldn't boot. The AmigaOne's U-boot firmware seems to have a problem
loading uImages bigger than 1.8 MB.
Signed-off-by: NGerhard Pircher <gerhard_pircher@gmx.net>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

This adds the bootwrapper for the cuImage target and a compatible property
check for "pnpPNP,501" to the generic serial console support code.
The default link address for the cuImage target is set to 0x800000. This
allows to boot the kernel with AmigaOS4's second level bootloader, which
always loads a uImage at 0x500000.
Signed-off-by: NGerhard Pircher <gerhard_pircher@gmx.net>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

This device tree does not provide the correct CPU name, as various CPU
models and revisions are used in AmigaOnes. Also the PCI root node does
not contain a interrupt mapping property, as all boards have different
interrupt routing. However the kernel can do a 1:1 mapping of all PCI
interrupts, as only i8259 legacy interrupts are used.
Signed-off-by: NGerhard Pircher <gerhard_pircher@gmx.net>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

This commit adds the setup code for booting Linux on AmigaOne G3SE (G3
only), AmigaOne XE and uA1 (G3/G4) desktop computers. These boards were
sold by Eyetech and are based on MAI Logic's Teron boards and its
Articia S northbridge.
The AmigaOne uses U-boot as firmware, which doesn't support a flattened
device tree yet. The northbridge has some design flaws, which makes it
necessary to use non cacheable memory for DMA operations
(CONFIG_NOT_COHERENT_CACHE) and to avoid setting the coherence (M) flag
for memory pages.
Signed-off-by: NGerhard Pircher <gerhard_pircher@gmx.net>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

The EEH code disables and enables interrupts during the
device recovery process.  This is unnecessary for MSI
and MSI-X interrupts because they are effectively disabled
by the DMA Stopped state when an EEH error occurs.  The
current code is also incorrect for MSI-X interrupts.  It
doesn't take into account that MSI-X interrupts are tracked
in a different way than LSI/MSI interrupts.  This patch
ensures only LSI interrupts are disabled/enabled.
Signed-off-by: NMike Mason <mmlnx@us.ibm.com>
Acked-by: NLinas Vepstas <linasvepstas@gmail.com>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

After the last changes, the mv643xx_eth driver now detects
a spurious interface on port 0. Since only port 1 is actually
connected to a PHY, remove its description.
Signed-off-by: NGabriel Paubert <paubert@iram.es>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

We currently place mmaps just below the stack on 32bit, but leave them
in the middle of the address space on 64bit:

00100000-00120000 r-xp 00100000 00:00 0                    [vdso]
10000000-10010000 r-xp 00000000 08:06 179534               /tmp/sleep
10010000-10020000 rw-p 00000000 08:06 179534               /tmp/sleep
10020000-10130000 rw-p 10020000 00:00 0                    [heap]
40000000000-40000030000 r-xp 00000000 08:06 440743         /lib64/ld-2.9.so
40000030000-40000040000 rw-p 00020000 08:06 440743         /lib64/ld-2.9.so
40000050000-400001f0000 r-xp 00000000 08:06 440671         /lib64/libc-2.9.so
400001f0000-40000200000 r--p 00190000 08:06 440671         /lib64/libc-2.9.so
40000200000-40000220000 rw-p 001a0000 08:06 440671         /lib64/libc-2.9.so
40000220000-40008230000 rw-p 40000220000 00:00 0
fffffbc0000-fffffd10000 rw-p fffffeb0000 00:00 0           [stack]

Right now it isn't an issue, but at some stage we will run into mmap or
hugetlb allocation issues. Using the same layout as 32bit gives us a
some breathing room. This matches what x86-64 is doing too.

00100000-00103000 r-xp 00100000 00:00 0                    [vdso]
10000000-10001000 r-xp 00000000 08:06 554894               /tmp/test
10010000-10011000 r--p 00000000 08:06 554894               /tmp/test
10011000-10012000 rw-p 00001000 08:06 554894               /tmp/test
10012000-10113000 rw-p 10012000 00:00 0                    [heap]
fffefdf7000-ffff7df8000 rw-p fffefdf7000 00:00 0
ffff7df8000-ffff7f97000 r-xp 00000000 08:06 130591         /lib64/libc-2.9.so
ffff7f97000-ffff7fa6000 ---p 0019f000 08:06 130591         /lib64/libc-2.9.so
ffff7fa6000-ffff7faa000 r--p 0019e000 08:06 130591         /lib64/libc-2.9.so
ffff7faa000-ffff7fc0000 rw-p 001a2000 08:06 130591         /lib64/libc-2.9.so
ffff7fc0000-ffff7fc4000 rw-p ffff7fc0000 00:00 0
ffff7fc4000-ffff7fec000 r-xp 00000000 08:06 130663         /lib64/ld-2.9.so
ffff7fee000-ffff7ff0000 rw-p ffff7fee000 00:00 0
ffff7ffa000-ffff7ffb000 rw-p ffff7ffa000 00:00 0
ffff7ffb000-ffff7ffc000 r--p 00027000 08:06 130663         /lib64/ld-2.9.so
ffff7ffc000-ffff7fff000 rw-p 00028000 08:06 130663         /lib64/ld-2.9.so
ffff7fff000-ffff8000000 rw-p ffff7fff000 00:00 0
fffffc59000-fffffc6e000 rw-p ffffffeb000 00:00 0           [stack]
Signed-off-by: NAnton Blanchard <anton@samba.org>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

move the definition of hose_list next to its hotplug spinlock.

create pcibios_io_size to encapsulate ifdef in existing pci-common
function pcibios_vaddr_is_ioport

move pci_address_to_pio to pci-common, using new pcibios_io_size, and
protect this GPL exported function against concurrent hotplug removal
Signed-off-by: NMilton Miller <miltonm@bga.com>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

If we can't allocate the requested number of MSIs, we can still tell the
generic code how many we were able to allocate. That can then be passed
onto the driver, allowing it to request that many in future, and
probably succeeed.
Signed-off-by: NMichael Ellerman <michael@ellerman.id.au>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

We also need to check that the device isn't using MSI-X in the irq fixup
routine, otherwise we might leave MSI-Xs configured at boot.
Signed-off-by: NMichael Ellerman <michael@ellerman.id.au>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

Firmware encodes the number of MSI-X requested by a device in a

different property than for MSI. Pull the property name out as a
parameter and share the logic for both cases.
Signed-off-by: NMichael Ellerman <michael@ellerman.id.au>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

We need to increment i in the loop that queries what interrupts firmware
gave us, otherwise we'll incorrectly use the first value over and over.
Signed-off-by: NMichael Ellerman <michael@ellerman.id.au>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

The lmb debugging can be turned on at boottime with lmb=debug on the
command line. However on powerpc that doesn't work, because we don't
necessarily call lmb_dump_all().

So always call lmb_dump_all() after lmb_analyze(), no output is
generated unless lmb=debug is found on the command line.
Signed-off-by: NMichael Ellerman <michael@ellerman.id.au>
Acked-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

Signed-off-by: NMichael Ellerman <michael@ellerman.id.au>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

Since we never hotplug add an isa bus, we never need to set primary.
Delete this write-only variable.
Signed-off-by: NMilton Miller <miltonm@bga.com>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

Use of_get_cpu_node, which is a superset of numa.c's find_cpu_node in
a less restrictive section (text vs cpuinit).
Signed-off-by: NMilton Miller <miltonm@bga.com>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

find_min_common_depth() was checking the property length incorrectly.
The value is in bytes not cells, and it is using the second entry.
Signed-off-By: NMilton Miller <miltonm@bga.com>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/platforms/pseries/hotplug-memory.c uses
remove_section_mapping() but doesn't include sparsemem.h which defines
it.  This can cause compilation fails for some configs.
Signed-off-by: NMichael Neuling <mikey@neuling.org>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

The new legacy_mem file in sysfs is causing problems with X on machines
that don't support legacy memory access. The way I initially implemented
it, we would fail with -ENXIO when trying to mmap it, thus exposing to
X that we do support the API but there is no legacy memory.

Unfortunately, X poor error handling is causing it to fail to start when
it gets this error.

This implements a workaround hack that instead maps anonymous memory
instead (using shmem if VM_SHARED is set, just like /dev/zero does).
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/oprofile/cell/spu_profiler.c is missing a asm/time.h
include which is required for ppc_proc_freq.  This can cause compile
failures for some config combinations.
Signed-off-by: NMichael Neuling <mikey@neuling.org>
Acked-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

Impact: fix dynamic ftrace with large modules in PPC64

The math to calculate the offset into the TOC that is taken from reading
the trampoline is incorrect. The bottom half of the offset is a signed
extended short. The current code was using an OR to create the offset
when it should have been using an addition.
Signed-off-by: NSteven Rostedt <srostedt@redhat.com>
Acked-by: NGeoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

Currently emulate_step() emulates mr. instructions without updating cr0
and this can be disastrous. Don't emulate mr.

This bug has been around for a while, but I am not sure if its a worthy
-stable candidate. I'll leave it to Ben do decide.
Signed-off-by: NAnanth N Mavinakayanahalli <ananth@in.ibm.com>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

Fixed v_mapped_by_tlbcam() and p_mapped_by_tlbcam() to use phys_addr_t
instead of unsigned long.  In 36-bit physical mode we really need these
functions to deal with phys_addr_t when trying to match a physical
address or when returning one.
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

Simply add appropriate sdhci nodes.

Note that U-Boot should configure pin multiplexing for eSDHC prior
to Linux could use it. U-Boot should also fill-in the clock-frequency
property (eSDHC clock depends on board-specific SCCR[ESDHCCM] bits).
Signed-off-by: NAnton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

- sdhc node renamed to sdhci ("sdhc" name is confusing since SDHC is
  used to name Secure Digital High Capacity cards, while SDHCI is an
  interface).

- Get rid of "fsl,esdhc" compatible entry, it's replaced by the
  "fsl,<chip>-esdhc" scheme;

- Get rid of `model' property.
Signed-off-by: NAnton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

Taking sizeof the result of sizeof is quite strange and does not seem to be
what is wanted here.

This was fixed using the following semantic patch.
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@@
expression E;
@@

- sizeof (
  sizeof (E)
- )

@@
type T;
@@

- sizeof (
  sizeof (T)
- )
// </smpl>
Signed-off-by: NJulia Lawall <julia@diku.dk>
Acked-by: NScott Wood <scottwood@freescale.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

This is a simple change to correct problems when using set_irq_type
on platforms using CPM2.  This code corrects the problem on most platform
but may have issues on 8272 derived platforms for some interrupts.

On 8272 PC2 & 3 are missing and PC 23 & 29 are added, which this patch
does not address.
Signed-off-by: NPaul Bilke <paul@conspiracy.net>
Reviewed-by: NAnton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

TSEC0 is connected to Vitesse 7385 5-port switch. The switch
isn't connected to any mdio bus, the link to the switch is fixed
to Full-duplex 1000 Mb/s (no pause).

This patch fixes following failure during bootup:

mdio@24520:01 not found
eth0: Could not attach to PHY
IP-Config: Failed to open eth0
Signed-off-by: NAnton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

commit b31a1d8b ("gianfar: Convert
gianfar to an of_platform_driver") introduced a child node for
the ethernet@25000 controller, but no address and size cells
specifiers were added, and that makes dtc unhappy:

DTC: dts->dtb  on file "arch/powerpc/boot/dts/mpc8313erdb.dts"
Warning (reg_format): "reg" property in /soc8313@e0000000/ethernet@25000/mdio@25520 has invalid length (8 bytes) (#address-cells == 2, #size-cells == 1)
Warning (avoid_default_addr_size): Relying on default #address-cells value for /soc8313@e0000000/ethernet@25000/mdio@25520
Warning (avoid_default_addr_size): Relying on default #size-cells value for /soc8313@e0000000/ethernet@25000/mdio@25520
Signed-off-by: NAnton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

I noticed this doing some randconfig testing (.config below).  I have
CONFIG_PM but no CONFIG_SUSPEND.  Bug is against mainline.

arch/powerpc/sysdev/built-in.o: In function `ipic_suspend':
ipic.c:(.text+0x6b34): undefined reference to `fsl_deep_sleep'
make[1]: *** [.tmp_vmlinux1] Error 1
make: *** [sub-make] Error 2

Looks like #ifdef CONFIG_PM in arch/powerpc/sysdev/ipic.c should be
CONFIG_SUSPEND.  d49747bd introduced
this.

Fix build when we have CONFIG_PM but no CONFIG_SUSPEND.
Signed-off-by: NMichael Neuling <mikey@neuling.org>
Acked-by: NScott Wood <scottwood@freescale.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

Board support for the InterControl Digsy-MTC device based on the MPC5200B SoC.
Signed-off-by: NGrzegorz Bernacki <gjb@semihalf.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

This patch adds board support for the Media5200 platform.  Changes are:
- add the media5200 device tree
- add the media5200 platform support code and cascaded interrupt controller
- add media5200 to the build targets.

Note: this patch also includes a minor tweak to the lite5200(b) target
images list to add the .dtb files to the image list.
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

This patch adds IRQ controller support to the MPC5200 General
Purpose Timer (GPT) device driver.  With this patch the mpc5200-gpt
driver supports both GPIO and IRQ functions.

The GPT driver was contained within the mpc52xx_gpio.c file, but this
patch moves it out into a new file (mpc52xx_gpt.c) since it has more
than just GPIO functionality now and it was only grouped with the
mpc52xx-gpio drivers as a matter of convenience before.  Also, this
driver will most likely get extended again to also provide support
for the timer function.

Implementation note: Alternately, I could have tried to implement
the IRQ support as a separate driver and left the GPIO portion alone.
However, multiple functions of this device (ie. GPIO input+interrupt
controller, or timer+GPIO) can be active at the same time and the
registers are shared so it is safer to contain all functionality
within a single driver.
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
Reviewed-by: NWolfram Sang <w.sang@pengutronix.de>

Rework the mpc5200-pic driver to simplify it and fix up the setting
of desc->status when set_type is called for internal IRQs (so they
are reported as level, not edge).  The simplification is due to
splitting off the handling of external IRQs into a separate block
so they don't need to be handled as exceptions in the normal
CRIT, MAIN and PERP paths.
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

pr_debug() calls in the 'hot' *_mask(), *_unmask(), *_ack() and
get_irq() makes adding #define DEBUG pretty much useless.  Remove
these calls because they completely swamp the output.
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
Reviewed-by: NWolfram Sang <w.sang@pengutronix.de>

Trim out obsolete/extraneous properties and tighten up some usage
conventions.  Changes include:
- removal of device_type properties
- removal of cell-index properties
- Addition of gpio-controller and #gpio-cells properties to gpio
  nodes
- Move common interrupt-parent property out of device nodes and
  into top level parent node.

This patch also include what looks to be just trivial editorial
whitespace/format changes, but there is real method in this
madness.  Editorial changes were made to keep the all the
mpc5200 board device trees as similar as possible so that diffs
between them only show the real differences between the boards.
The pcm030 device tree was most affected by this because many
of the comments had been changed from // to /* */ style and
some cell values where changed from decimal to hex format when
it was cloned from one of the other 5200 device trees.
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
Reviewed-by: NWolfram Sang <w.sang@pengutronix.de>

Signed-off-by: NPhilippe Reynes <philippe.reynes@isismpp.fr>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

Automatic I2C device probing is not done any more. Therefore we need
proper DTS device node definitions for the I2C LM75 thermal sensor on
the TQM85xx modules.
Signed-off-by: NWolfgang Grandegger <wg@grandegger.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

Signed-off-by: NWolfgang Grandegger <wg@grandegger.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>