linux.git/arch/arm/kernel/setup.c, branch v3.10

ARM: 7763/1: kernel: fix __cpu_logical_map default initialization

2013-06-24T13:28:43+00:00

The __cpu_logical_map array is statically initialized to 0, which is a valid
MPIDR value. To prevent issues with the current implementation, this patch
defines an MPIDR_INVALID value, and statically initializes the
__cpu_logical_map[] array to it. Entries in the arm_dt_init_cpu_maps()
tmp_map array used to stash DT reg properties while parsing DT are initialized
with the MPIDR_INVALID value as well for consistency.

Signed-off-by: Lorenzo Pieralisi 
Acked-by: Nicolas Pitre 
Cc: Will Deacon 
Signed-off-by: Russell King

Merge branch 'late/fixes' into fixes

2013-05-09T20:05:15+00:00

* late/fixes:
  ARM: OMAP2+: Fix unmet direct dependencies for SERIAL_OMAP
  ARM: ux500: always select ABX500_CORE
  ARM: SIRF: select SMP_ON_UP only on SMP builds
  ARM: SPEAr: conditionalize l2x0 support
  ARM: imx: build CPU suspend code only when needed
  ARM: OMAP: build SMP code only for OMAP4/5
  ARM: tegra: Tegra114 needs CPU_FREQ_TABLE
  ARM: default machine descriptor for multiplatform

Signed-off-by: Olof Johansson

Merge branches 'devel-stable', 'entry', 'fixes', 'mach-types', 'misc' and 'smp-hotplug' into for-linus

2013-05-02T20:30:36+00:00

ARM: default machine descriptor for multiplatform

2013-04-29T19:56:57+00:00

Since we now have default implementations for init_time and init_irq,
the init_machine callback is the only one that is not yet optional,
but since simple DT based platforms all have the same
of_platform_populate function call in there, we can consolidate them
as well, and then actually boot with a completely empty machine_desc.
Unofortunately we cannot just default to an empty init_machine: We
cannot call of_platform_populate before init_machine because that
does not work in case of auxdata, and we cannot call it after
init_machine either because the machine might need to run code
after adding the devices.

To take the final step, this adds support for booting without defining
any machine_desc whatsoever.

For the case that CONFIG_MULTIPLATFORM is enabled, it adds a
global machine descriptor that never matches any machine but is
used as a fallback if nothing else matches. We assume that without
CONFIG_MULTIPLATFORM, we only want to boot on the systems that the kernel
is built for, so we still retain the build-time warning for missing
machine descriptors and the run-time warning when the platform does not
match in that case.

In the case that we run on a multiplatform kernel and the machine
provides a fully populated device tree, we attempt to keep booting,
hoping that no machine specific callbacks are necessary.

Finally, this also removes the misguided "select ARCH_VEXPRESS" that
was only added to avoid a build error for allnoconfig kernels.

Signed-off-by: Arnd Bergmann 
Acked-by: Nicolas Pitre 
Acked-by: Olof Johansson 
Cc: "Russell King - ARM Linux" 
Cc: Rob Herring

ARM: 7700/2: Make cpu_init() notrace

2013-04-26T10:09:32+00:00

On resume from CPU power down any trace hooks enabled in cpu_init()
will get called before that function has done set_my_cpu_offset(),
so any use of per-cpu variables by trace hook code will cause bad
things to happen. Prevent this by marking the function notrace.

This fixes lockups/crashes seen when enabling function tracer on TC2
with the not yet mainlined cpuidle driver.

Signed-off-by: Jon Medhurst 
Acked-by: Nicolas Pitre 
Signed-off-by: Russell King

ARM: 7694/1: ARM, TCM: initialize TCM in paging_init(), instead of setup_arch()

2013-04-17T15:53:24+00:00

tcm_init() call iotable_init() and it use early_alloc variants which
do memblock allocation. Directly using memblock allocation after
initializing bootmem should not permitted, because bootmem can't know
where are additinally reserved.
So move tcm_init() to a safe place before initalizing bootmem.

(On the U300)

Tested-by: Linus Walleij 
Signed-off-by: Joonsoo Kim 
Signed-off-by: Russell King

ARM: 7690/1: mm: fix CONFIG_LPAE typos

2013-04-03T15:45:51+00:00

CONFIG_LPAE doesn't exist: the correct option is CONFIG_ARM_LPAE, so fix
up the two typos under arch/arm/.

The fix to head.S is slightly scary, but this is just for setting up
an early io-mapping for the serial port when running on a big-endian,
LPAE system. Since these systems don't exist in the wild (at least, I
have no access to one outside of kvmtool, which doesn't provide a serial
port suitable for earlyprintk), then we can revisit the code later if it
causes any problems.

Signed-off-by: Paul Bolle 
Signed-off-by: Will Deacon 
Signed-off-by: Russell King

ARM: 7680/1: Detect support for SDIV/UDIV from ISAR0 register

2013-03-22T17:16:55+00:00

The ISAR0 register indicates support for the SDIV and UDIV
instructions in both the Thumb and ARM instruction set. Read the
register to detect the supported instructions and update the
elf_hwcap mask as appropriate. This is better than adding more
and more cpuid checks in proc-v7.S for each new cpu variant that
supports these instructions.

Acked-by: Will Deacon 
Cc: Stepan Moskovchenko 
Signed-off-by: Stephen Boyd 
Signed-off-by: Russell King

ARM: 7679/1: Clear IDIVT hwcap if CONFIG_ARM_THUMB=n

2013-03-22T17:16:54+00:00

Don't advertise support for the SDIV/UDIV thumb instructions if
the kernel is not compiled with support for thumb userspace. This
is in line with how we remove the THUMB hwcap in these
configurations.

Acked-by: Will Deacon 
Cc: Stepan Moskovchenko 
Signed-off-by: Stephen Boyd 
Signed-off-by: Russell King

ARM: use read_cpuid_id() instead of read_cpuid(CPUID_ID)

2013-01-31T20:44:47+00:00

Both calls are identical currently. This patch prepares to deprecate
read_cpuid on machines without cp15.

Also move an unconditional usage of read_cpuid_cachetype to a more local
scope as read_cpuid_cachetype uses read_cpuid, too.

Signed-off-by: Uwe Kleine-König 
Message-Id: 1359646587-1788-1-git-send-email-u.kleine-koenig@pengutronix.de