UP systems do not implement all the instructions that SMP systems have,
so in order to boot a SMP kernel on a UP system, we need to rewrite
parts of the kernel.

Do this using an 'alternatives' scheme, where the kernel code and data
is modified prior to initialization to replace the SMP instructions,
thereby rendering the problematical code ineffectual.  We use the linker
to generate a list of 32-bit word locations and their replacement values,
and run through these replacements when we detect a UP system.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

All platforms which currently support SMP also support the ARM SCU
and ARM TWD blocks, so it's pointless to make these config symbols
conditional on the platform symbols which SMP is already conditional
on.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

5cfc8ee0 (ARM: convert arm to arch_gettimeoffset()) marked all of
at91 AND at91x40 as needing ARCH_USES_GETTIMEOFFSET, and hence no high
res timer support / accurate clock_gettime() - But only at91x40 needs it.

Cc: stable@kernel.org
Signed-off-by: NPeter Korsgaard <peter.korsgaard@barco.com>
Acked-by: NJohn Stultz <johnstul@us.ibm.com>
Acked-by: NJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

On the r2p0, r2p1 and r2p2 versions of the Cortex-A9, data corruption
can occur if a shared cache line is replaced on one CPU as another CPU
is accessing it.

This workaround sets two bits in the diagnostic register of the Cortex-A9,
reducing the linefill issuing capabilities of the processor and
avoiding the erroneous behaviour.
Acked-by: NCatalin Marinas <catalin.marinas@arm.com>
Signed-off-by: NWill Deacon <will.deacon@arm.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

On versions of the Cortex-A9 up to and including r2p2, under rare
circumstances, a DMB instruction between 2 write operations may not
ensure the correct visibility ordering of the 2 writes.

This workaround sets a bit in the diagnostic register of the Cortex-A9,
causing the DMB instruction to behave like a DSB, which functions
correctly on the affected cores.
Acked-by: NCatalin Marinas <catalin.marinas@arm.com>
Signed-off-by: NWill Deacon <will.deacon@arm.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Partially revert e69edc79, which introduced automatic zreladdr
support.  The change in the way the manual definition is defined
seems to be error and conflict prone.  Go back to the original way
we were handling this for the time being, while keeping the automatic
zreladdr facility.

Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

fixes the warning:
.config:369:warning: symbol value '' invalid for ZRELADDR

and the prompt for ZRELADDR on make
Signed-off-by: NErik Gilling <konkers@android.com>

This patch adds default zreladdr of ARCH_S5PV310.
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

This fixes:

	scripts/kconfig/mconf arch/arm/Kconfig
	arch/arm/Kconfig:1187: invalid option
	make[1]: *** [menuconfig] Error 1
	make: *** [menuconfig] Error 2

which was introduced by

	1cea7326 ([ARM] tegra: SMP support)

Cc: Tanmay Upadhyay <tanmay.upadhyay@einfochips.com>
Cc: xsecute@googlemail.com
Cc: Eric Miao <eric.y.miao@gmail.com>
Cc: Colin Cross <ccross@android.com>
Signed-off-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

On versions of the Cortex-A9 prior to r2p0, performing TLB invalidations by
ASID match can result in the incorrect ASID being broadcast to other CPUs.
As a consequence of this, the targetted TLB entries are not invalidated
across the system.

This workaround changes the TLB flushing routines to invalidate entries
regardless of the ASID.

Cc: <stable@kernel.org>
Tested-by: NRob Clark <rob@ti.com>
Acked-by: NCatalin Marinas <catalin.marinas@arm.com>
Signed-off-by: NWill Deacon <will.deacon@arm.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

This patch moves the dependency of watchdog timer driver from MACH_XXX(board)
to ARCH_XXX(SoC). This will enable all machines using Samsung S3C64XX and S5P
SoCs to use the WDT driver by default.
Signed-off-by: NBanajit Goswami <banajit.g@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Conflicts:

	arch/arm/Kconfig
	arch/arm/mach-s3c64xx/Kconfig
	arch/arm/mach-s5p6442/Kconfig
	arch/arm/mach-s5pc100/Kconfig

Signed-off-by: NColin Cross <ccross@android.com>
Signed-off-by: NErik Gilling <konkers@android.com>

v2: fixes from Russell King:
	- include linux/io.h instead of asm/io.h
	- fix whitespace in Kconfig
	- Use spin_lock_init to initialize lock
	- Return -ENOSYS instead of BUG for unimplemented clock ops
	- Use proper return values in tegra2 clock ops
    additional changes:
	- Rename some clocks to match dev_ids
	- add rate propagation
	- add debugfs entries
	- add support for clock listed in clk_lookup under multiple dev_ids
v3:
	- Replace per-clock locking with global clock lock
	- Autodetect clock state on init
	- Let clock dividers pick next lower possible frequency
	- Add support for clock init tables
	- Minor bug fixes
	- Fix checkpatch issues
Signed-off-by: NColin Cross <ccross@android.com>

v2: Fixes from Mike Rapoport
	- remove unused header files (mach/dma.h and mach/nand.h)
	- remove tegra 1 references from Makefile.boot

v2: fixes from Russell King
	- remove mach/io.h include from mach/iomap.h
	- fix whitespace in Kconfig

v2: from Colin Cross
	- fix invalid immediate in debug-macro.S

v3:
	- allow selection of multiple boards
Signed-off-by: NColin Cross <ccross@android.com>
Signed-off-by: NErik Gilling <konkers@android.com>

This patch adds HAVE_S3C2410_I2C to control inclusion of I2C bus driver
on Samsung SoCs and makes I2C bus driver dependency SoC specific instead
of machine specific. This will enalbe all machines using Samsung ARCH_S3C2410,
_S3C64XX, _S5P6440, _S5PC100, and _S5PV210 to select the I2C driver by default
Signed-off-by: NNaveen Krishna Ch <ch.naveen@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>
Cc: Ben Dooks <ben-linux@fluff.org>

This patch moves the dependency of RTC driver from MACH_XXX(board) to
ARCH_XXX(SoC). This will enable all machines using Samsung S5P6440, S5PC100
and S5PV210 SoCs to use RTC driver by default.
Signed-off-by: NAtul Dahiya <atul.dahiya@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

This patch adds the Kconfig and Makefile for the new S5PV310 SoC.
It also updates arch/arm Kconfig, Makefile and arch/arm/mm/Kconfig
to include support for the new S5PV310.
Signed-off-by: NChanghwan Youn <chaos.youn@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Introduce SHMOBILE_TIMER_HZ for SH-Mobile.

Allow users to select HZ on their system to
minimize potential timer drift. Use 128 Hz as
default to work well with the 32768 Hz RCLK.
Signed-off-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Add LPC32XX support in arch/arm/Kconfig and arch/arm/Makefile
Signed-off-by: NKevin Wells <wellsk40@gmail.com>
Signed-off-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>

Now that all arches have been converted over to use generic time via
clocksources or arch_gettimeoffset(), we can remove the GENERIC_TIME
config option and simplify the generic code.
Signed-off-by: NJohn Stultz <johnstul@us.ibm.com>
LKML-Reference: <1279068988-21864-4-git-send-email-johnstul@us.ibm.com>
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>

The TWD local timers are unable to wake up the CPU when it is placed
into a low power mode, eg. C3.  Therefore, we need to adapt things
such that the TWD code can cope with this.

We do this by always providing a broadcast tick function, and marking
the fact that the TWD local timer will stop in low power modes.  This
means that when the CPU is placed into a low power mode, the core
timer code marks this fact, and allows an IPI to be given to the core.
Tested-by: NSantosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>

SPARSE_IRQ doesn't need to be a visible option, only those platforms
supporting that will select it.
Signed-off-by: NEric Miao <eric.miao@canonical.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Acked-by: NTony Lindgren <tony@atomide.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Everything should now be using sparsemem rather than discontigmem, so
remove the code supporting discontigmem from ARM.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

As long as the zImage is placed within the 128MB range from the start of
memory, ZRELADDR (Address where the decompressed kernel will be placed,
usually == PHYS_OFFSET + TEXT_OFFSET) can be determined at run-time by
masking PC with 0xf80000000.

Running through all the Makefile.boot, all those zreladdr-y
addresses == 0x[0-f][08]00_0000 + TEXT_OFFSET can be determined at
run-time.

Option CONFIG_AUTO_ZRELADDR and CONFIG_ZRELADDR are introduced,
CONFIG_ZRELADDR _must_ be explicitly specified if:

- ((zreladdr-y - TEXT_OFFSET) & ~0xf8000000) != 0, which means
  masking PC with 0xf8000000 will result in an incorrect address.
  Currently this is only a problem on u300.

- or the assumption of the zImage being loaded by the bootloader within
  the first 128MB of RAM is incorrect

- or when ZBOOT_ROM is used, where the above assumption is usually wrong.

[ukleinek: changed mask from 0xf0000000 to 0xf8000000 for mx1 and shark
+ some review fixes from the mailing list]
Original-Idea-and-Signed-off-by: NNicolas Pitre <nicolas.pitre@linaro.org>
Signed-off-by: NEric Miao <eric.miao@canonical.com>
Signed-off-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>

Allow SH-Mobile ARM users to adjust FORCE_MAX_ZONEORDER.

The Kconfig entry is taken from SH and non-4K page size
stuff has been trimmed away. For now only SH-Mobile ARM is
allowed to change this variable, SA1111 configs are kept at
"9" and the rest at "11".

CONFIG_FORCE_MAX_ZONEORDER lets the user tweak the maximum
amount of physically contiguous memory that can be allocated
by the kernel.
Signed-off-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

This patch enables the HAVE_REGS_AND_STACK_ACCESS_API option
for ARM which is required by the kprobe events tracer. Code based
on the PowerPC port.

Cc: Jean Pihet <jpihet@mvista.com>
Tested-by: NJamie Iles <jamie.iles@picochip.com>
Signed-off-by: NWill Deacon <will.deacon@arm.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

So to allow NR_IRQS to be dynamic and platforms to specify the number
of IRQs really needed.
Acked-by: NPaul Mundt <lethal@linux-sh.org>
Signed-off-by: NEric Miao <eric.y.miao@gmail.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

This patch adds support for the Cortex-A9 local timers available when
using the CA9X4 daughterboard with the Versatile Express.
Signed-off-by: NWill Deacon <will.deacon@arm.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

This was deprecated in 2001 and announced to live on for 5 years.

For now provide a kernel parameter for those who still need it.
Acked-by: NEric Miao <eric.miao@canonical.com>
Signed-off-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>

CPU performance event counters on v7 cores will only operate
if either the NIDEN or DBGEN signals are driven high.

For the OMAP3 platform, these signals are driven low by default
but DBGEN can be asserted by selecting the OMAP3_EMU Kconfig option,
which enables the virtual clock for hardware debugging peripherals.
Acked-by: NJean Pihet <jpihet@mvista.com>
Signed-off-by: NWill Deacon <will.deacon@arm.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

This hasn't been actively maintained for a long time, only receiving
the occasional build update when things break.  I doubt anyone has
one of these on their desks anymore.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Signed-off-by: NPavel Machek <pavel@ucw.cz>
[dwalker@codeaurora.org: renamed to trout, checkpatch cleanup]
Signed-off-by: NDaniel Walker <dwalker@codeaurora.org>

This is the very basic stuff without the changing canary upon
task switch yet.  Just the Kconfig option and a constant canary
value initialized at boot time.
Signed-off-by: NNicolas Pitre <nicolas.pitre@linaro.org>

This patch adds PCIe support for CNS3xxx-based boards. The support
was tested with a directly attached SKY2 NIC, and EHCI USB controller
behind the PLX PEX8112 P2P bridge (to make sure that type1 cfg cycles
work as expected).
Signed-off-by: NAnton Vorontsov <avorontsov@mvista.com>

Add an option to force usage of the in-kernel cmdline even if the boot
loader passes another command string to the kernel.

Useful if someone cannot or don't want to change the
command-line options of the boot loader but is able to change
the kernel.
Signed-off-by: NAlexander Holler <holler@ahsoftware.de>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Fixup commit 5cfc8ee0 which
introduced ARCH_USES_GETTIMEOFFSET but missed out several
S5P architectures.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

This patch moves S5PC100 SoC support to plat-s5p framework. Most
periperal support code has been already moved from plat-s5pc1xx to
mach-s5pc100.
Signed-off-by: NMarek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

GENERIC_TIME is now enabled by default, so 'select GENERIC_TIME'
is redundant.  Remove them.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

The ARCH_REQUIRE_GPIOLIB config option will select GPIOLIB which
in turn will select GENERIC_GPIO.  Because of this, there is no
reason to do the select GENERIC_GPIO in arch/arm/Kconfig for the
architectures that have ARCH_REQUIRE_GPIOLIB.
Signed-off-by: NH Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>