Actually save the clock frequency retrieved from fdt data. I fumbled
this when I converted getprop to getencprop.

Submitted by: Thomas Skibo
Pointy hat to: ian

Trivial changes/forced-commit to document previous change r264050 whose
description was eaten by the dog (or an editor crash or something).

Add variable-frequency support to the arm mpcore eventtime

Trivial changes/forced-commit to document previous change r264050 whose
description was eaten by the dog (or an editor crash or something).

Add variable-frequency support to the arm mpcore eventtimer driver.

This allows a platform's early init code to tell the mpcore driver that the
clock frequency can vary. That causes the mpcore driver to register an
eventtimer, but not a timecounter. The platform has to provide a time
counter using some other fixed-frequency clock, but can still use the
per-cpu goodness of the mpcore hardware for event timers.

When the platform support code does something to change the frequency of
the CPU clocks (power saving, thermal management) it must tell the mpcore
driver code about it using arm_tmr_change_frequency().

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Disable the timer and clear any pending bit, then setup the new counter
register values, then restart the timer. This prevents a situation where
an old event fires just as we're about to load a new

Disable the timer and clear any pending bit, then setup the new counter
register values, then restart the timer. This prevents a situation where
an old event fires just as we're about to load a new value into the timer,
when the start routine is called to change the time of the current event.

Also re-nest the parens properly for casting the result of converting
time and frequency to a count. This doesn't actually change the result of
the calcs, but will some day prevent a loss-of-precision warning on the
assignment, if that warning gets enabled.

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Use the standard __used macro instead of a bare __attribute__.

Submitted by: bde

Add __attribute__((used)) so that the delay implementation doesn't get
optimized away as unreferenced, causing linker errors when trying to
resolve the weak reference to the missing function.

Supply a DELAY() implementation via weak linkage, so that SoC-specific
code can supply a better implementation. A SoC with variable CPU frequency
is likely to use a fixed-frequency timer for DELAY()

Supply a DELAY() implementation via weak linkage, so that SoC-specific
code can supply a better implementation. A SoC with variable CPU frequency
is likely to use a fixed-frequency timer for DELAY() (but still use the
mpcore private timers as eventtimers).

Also remove spaces from the eventtimer and timecounter names.

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Replace many pasted identical definitions of cpu_initclocks() with a common
implementation in arm/machdep.c. Most arm platforms either don't need to
do anything, or just need to call the standard ev

Replace many pasted identical definitions of cpu_initclocks() with a common
implementation in arm/machdep.c. Most arm platforms either don't need to
do anything, or just need to call the standard eventtimer init routines.
A generic implementation that does that is now provided via weak linkage.
Any platform that needs to do something different can provide a its own
implementation to override the generic one.

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Follow r261352 by updating all drivers which are children of simplebus
to check the status property in their probe routines.

Simplebus used to only instantiate its children whose status="okay"
but t

Follow r261352 by updating all drivers which are children of simplebus
to check the status property in their probe routines.

Simplebus used to only instantiate its children whose status="okay"
but that was improper behavior, fixed in r261352. Now that it doesn't
check anymore and probes all its children; the children all have to
do the check because really only the children know how to properly
interpret their status property strings.

Right now all existing drivers only understand "okay" versus something-
that's-not-okay, so they all use the new ofw_bus_status_okay() helper.

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Remove #include <machine/frame.h> from all the arm code that doesn't
really need it. That would be almost everywhere it was included. Add
it in a couple files that really do need it and were previo

Remove #include <machine/frame.h> from all the arm code that doesn't
really need it. That would be almost everywhere it was included. Add
it in a couple files that really do need it and were previously getting
it by accident via another header.

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Let the platform calculate the timer frequency at runtime, and use that for
the omap4, instead of relying on the (wrong) value provided in the dts.

MFcalloutng:
Switch eventtimers(9) from using struct bintime to sbintime_t.
Even before this not a single driver really supported full dynamic range of
struct bintime even in theory, not speaking abo

MFcalloutng:
Switch eventtimers(9) from using struct bintime to sbintime_t.
Even before this not a single driver really supported full dynamic range of
struct bintime even in theory, not speaking about practical inexpediency.
This change legitimates the status quo and cleans up the code.

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Fix spelling.

Merging projects/armv6, part 1

Cummulative patch of changes that are not vendor-specific:
- ARMv6 and ARMv7 architecture support
- ARM SMP support
- VFP/Neon support
- ARM Generic Interrupt Cont

Merging projects/armv6, part 1

Cummulative patch of changes that are not vendor-specific:
- ARMv6 and ARMv7 architecture support
- ARM SMP support
- VFP/Neon support
- ARM Generic Interrupt Controller driver
- Simplification of startup code for all platforms

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