Since we now set _PAGE_COHERENT in the Linux PTE we shouldn't be clearing
it out before we setup the SW TLB. Today all the SW TLB machines
(603/e300) that we support are non-SMP, however there are some errata on
some devices that cause us to set _PAGE_COHERENT via CPU_FTR_NEED_COHERENT.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
BestComm, a DMA engine in MPC52xx SoC, requires snooping when
CPU caches are enabled to work properly.
Adding CPU_FTR_NEED_COHERENT fixes NFS problems on MPC52xx machines
introduced by 'powerpc/mm: Fix handling of _PAGE_COHERENT in BAT setup
code' (sha1: 4c456a67f5).
Signed-off-by: Piotr Ziecik <kosmo@semihalf.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This new compiler warning:
arch/powerpc/platforms/cell/interrupt.c: In function 'handle_iic_irq':
arch/powerpc/platforms/cell/interrupt.c:240: warning: unused variable 'cpu'
Triggers because the local variable 'cpu' became unused due to commit:
dee4102: sparseirq: use kstat_irqs_cpu instead
Remove the variable.
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: ppc-dev <linuxppc-dev@ozlabs.org>
LKML-Reference: <20090316185256.4a160374.sfr@canb.auug.org.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Convert the PS3 Video RAM Storage Driver from an MTD driver to a plain block
device driver.
The ps3vram driver exposes unused video RAM on the PS3 as a block device
suitable for storage or swap. Fast data transfer is achieved using a local
cache in system RAM and DMA transfers via the GPU.
The new driver is ca. 50% faster for reading, and ca. 10% for writing.
Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Acked-by: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
fixed-head.o must be linked into the bootwrapper for raw-binary images to
work. This patch adds it into the bootwrapper.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Reported-by: Eddie Dawydiuk <eddie@embeddedarm.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This patch adds the utility function mpc52xx_get_xtal_freq() to get
the frequency of the external oscillator clock connected to the pin
SYS_XTAL_IN. The MSCAN may us it as clock source. Unfortunately, this
value is not available from the FDT blob, but it can be determined
from the IPB frequency.
Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Use device tree to determine if we actually have an MPIC and use
CPU feature to decide if we should use doorbells for IPIs.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
There is no dependece between efp and math-emu. But when disable math-emu
the efp code cannot be built.
Signed-off-by: Liu Yu <yu.liu@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
setup_irq(0, NULL) is broken as setup_irq() dereferences action
unconditionally.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
CONFIG_PPC_MULTIPLATFORM is a remain of the pre-powerpc days and isn't
really meaningful anymore. It was basically equivalent to PPC64 || 6xx.
This removes it along with the following changes:
- 32-bit platforms that relied on PPC32 && PPC_MULTIPLATFORM now rely
on 6xx which is what they want anyway.
- A new symbol, PPC_BOOK3S, is defined that represent compliance with
the "Server" variant of the architecture. This is set when either 6xx
or PPC64 is set and open the door for future BOOK3E 64-bit.
- 64-bit platforms that relied on PPC64 && PPC_MULTIPLATFORM now use
PPC64 && PPC_BOOK3S
- A separate and selectable CONFIG_PPC_OF_BOOT_TRAMPOLINE option is now
used to control the use of prom_init.c
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
While we did add support for _PAGE_SPECIAL on some 32-bit platforms,
we never actually built get_user_pages_fast() on them. This fixes
it which requires a little bit of ifdef'ing around.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
When the console is on a serial port to be driven by serial8250, a
character can be lost from the end of the first line in the two-line
sequence
serial8250.0: ttyS0 at MMIO 0xe0004500 (irq = 42) is a 16550A
console handover: boot [udbg0] -> real [ttyS0]
This happens because udbg_puts or udbg_write stuff the last byte of
the line into the Tx FIFO and return, whereupon the serial8250
initialization code immediately empties that FIFO. The fix: udbg_puts
and udbg_write now wait for the Tx FIFO to clear before returning.
This delays the system by one additional serial frame time for each
line written by udbg, but the effect is not noticeable, a cumulative
17 milliseconds for 200 lines of early printk output at 115200 baud.
Also, the routines in udbg_16550.c now emit CRLF instead of LFCR.
Linux makes a point of emitting CRLF because, when serial output is
captured to a file, LFCR sequences can confuse text editors. See
http://lkml.org/lkml/2006/2/4/50 for some history.
Signed-off-by: Andrew Klossner <andrew@cesa.opbu.xerox.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
The Axon MSI driver depends on more than just PCI_MSI, so add a
Kconfig fragment for it. Fixes randconfig build failures.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
There's no way for us to express to firmware that we want a
discontiguous, or non-zero based, range of MSI-X entries. So we
must reject such requests.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
So at least you can see what kernel you're booting if you die
before the kernel prints it mid-way through start_kernel().
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This patch enables oprofile for all 3 FX variants and GX variant of the
750 processor.
Signed-off-by: Octavian Purdila <opurdila@ixiacom.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
We need to offset by *pos bytes, not *pos words.
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Based on an original patch from Roel Kluin <roel.kluin@gmail.com>.
The write size calculated during regs and fpcr writes may currently
go negative. Because size is unsigned, this will wrap, and our
check for EFBIG will fail.
Instead, do the check for EFBIG before subtracting from size.
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Change the ps3av_auto_videomode() mode id argument type from unsigned to
signed so a negative id can be detected and reported as an -EINVAL failure.
Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To help users diagnose hotpug memory problems, change the
printing of memory hotplug errors from DBG() to pr_err().
Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
The powerpc 64 bit architecture defines three flags for the
DABR (Data Address Breakpoint Register). Add definitions
for the currently missing DABR_DATA_WRITE and DABR_DATA_READ
flags to the powerpc reg.h file.
Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Add macros for the GS (guest state) bit to the list of MSR bit definitions.
On PowerPC cores that support embedded hypervisor mode, GS is cleared if
the system is running in hypervisor state (and MSR[PR] is cleared), and set
if it's running in guest state. See the Power ISA 2.06 specification for
more information.
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
For ppc750 processors which use 4 performance counters instead of the
6 G4 uses but otherwise is compatible with G4.
Signed-off-by: Octavian Purdila <opurdila@ixiacom.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
spuctx_switch_state() warns if ktime goes backwards, but it
sometimes compares an uninitialized value, which showed that
the data was unreliable when we actually saw the warning.
Initialize it to the current time in order to get correct data.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
When identify_cpu() is called a second time with a logical PVR, it
only copies a subset of the cpu_spec fields so as to avoid overwriting
the performance monitor fields that were initialized based on the
real PVR.
However some of the other, non performance monitor related fields are
also not copied:
* pvr_mask
* pvr_value
* mmu_features
* machine_check
The fact that pvr_mask is not copied can result in show_cpuinfo()
showing the cpu as "unknown", if we override an unknown PVR with a
logical one - as reported by Shaggy.
So change the logic to copy all fields, and then put back the PMC
related ones in the case that we're overwriting a real PVR with a
logical one.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Acked-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
The for-loop body of identify_cpu() has gotten a little big, so move the
loop body logic into a separate function. No other changes.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Acked-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This adds the necessary bits and pieces to powerpc implementation of
ioremap to benefit from caller tracking in /proc/vmallocinfo, at least
for ioremap's done after mem init as the older ones aren't tracked.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Setting G5's cpu frequency transition latency to CPUFREQ_ETERNAL stops
ondemand governor from working. I measured the latency using sched_clock
and haven't seen much higher than 11000ns, so I set this to 12000ns for
my configuration. Possibly other configurations will be different?
Ideally the generic code would be able to measure it in case the platform
does not provide it.
But this simple patch at least makes it throttle again.
Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Impact: __per_cpu_load available on all SMP capable archs
Percpu now requires three symbols to be defined - __per_cpu_load,
__per_cpu_start and __per_cpu_end. There were three archs which
didn't have it. Update them as follows.
* powerpc: can use generic PERCPU() macro. Compile tested for
powerpc32, compile/boot tested for powerpc64.
* ia64: can use generic PERCPU_VADDR() macro. __phys_per_cpu_start is
identical to __per_cpu_load. Compile tested and symbol table looks
identical after the change except for the additional __per_cpu_load.
* arm: added explicit __per_cpu_load definition. Currently uses
unified .init output section so can't use the generic macro. Dunno
whether the unified .init ouput section is required by arch
peculiarity so I left it alone. Please break it up and use PERCPU()
if possible.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Pat Gefre <pfg@sgi.com>
Cc: Russell King <rmk@arm.linux.org.uk>
The registers for the local bus are incorrectly set to 0xf8005000 rather
than there actual location of 0xfef05000.
Signed-off-by: Martyn Welch <martyn.welch@gefanuc.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Defining flash partition table in platform code is deprecated, and due to
recent changes linkstation and storcenter do not compile any more with
their default configurations because of undefined references to
physmap_set_partitions(). Instead of fixing them by using the correct
kernel configuration macro in preprocessor conditional, remove partition
table definitions altogether. Instead add support for partition definition
on the command-line and in device tree to the default configurations.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
The Freescale Serial Synchronous Interface (SSI) is an audio device present on
some Freescale SOCs. Various implementations of the SSI have a different
transmit and receive FIFO depth, but are otherwise identical. To support
these variations, add a new property fsl,fifo-depth to the SSI node that
specifies the depth of the FIFOs.
Also update the MPC8610 HPCD device tree with this property.
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
The e500mc core supports the new tlbilx instructions that do core
local invalidates and also provide us the ability to take down
all TLB entries matching a given PID.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
On MPC837X CPUs Dual-Role USB isn't always available (for example DR
USB pins can be muxed away to eSDHC).
U-Boot adds status = "disabled" property into the DR USB nodes to
indicate that we must not try to configure or probe Dual-Role USB,
otherwise we'll break eSDHC support on targets with MPC837X CPUs.
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
The interrupt pending register is write 1 clear. If there are more than
one external interrupts pending at the same time, acking the first
interrupt by reading pending register then OR the corresponding bit and
write back to pending register will also clear other interrupt pending
bits. That will cause loss of interrupt.
Signed-off-by: Da Yu <dayu@datangmobile.cn>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This patch updates the Xilinx ML507 device tree to match the released
ML507 powerpc reference design (ml507_ppc440_emb_ref). This patch is
needed to boot Linux on the ML507 powerpc reference design without
manually generating and tweaking a device tree from the project directory.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
