MFC 275207:

We don't use the hypervisor interrupt, make it optional in the device tree.

Submitted by: Julien Grall <julien.grall AT linaro.org>

MFC 275208:

Some device tree configurations place the generic timer under the root
of the tree and not under simplebus. Update the driver to handle this.

Submitted by: Julien Grall <julien.grall AT linaro.org>

MFC r269594, r269596, r269597, r269598, r269605, r269606:

Set ofwbus and simplebus to attach during BUS_PASS_BUS.

Define names that drivers can use to adjust their position relative to
other drivers within a BUS_PASS

Adjust ofwbus and simplebus to attach at BUS_PASS_ORDER_MIDDLE, so that
a platform can attach some other bus first if necessary.

Set the pl310 L2 cache driver to attach during the middle of BUS_PASS_CPU.

Attach arm generic interrupt and timer drivers in the middle of
BUS_PASS_INTERRUPT and BUS_PASS_TIMER, respectively.

Add an arm option, ARM_DEVICE_MULTIPASS, used to opt-in to multi-pass
device attachment on arm platforms. If this is defined, nexus attaches
early in BUS_PASS_BUS, and other busses and devices attach later, in the
pass number they are set up for. Without it defined, nexus attaches in
BUS_PASS_DEFAULT and thus so does everything else, which is status quo.

MFC 264052, 264057, 264065, 264094, 264103, 264120

Actually save the mpcore clock frequency retrieved from fdt data.

imx6..
- Don't call sdhci_init_slot() until after handling the FDT properties
related to detecting card presence.
- Flag several sysctl variables as tunables.
- Rework the cpu frequency management code for imx6 to add "operating
points" and min/max frequency controls.

generic timer...
- Setup both secure and non-secure timer IRQs.
We don't know our ARM security state, so one of them will operate.
- Don't set frequency, since it's unpossible in non-secure state.
Only rely on DTS clock-frequency value or get clock from timer.

MFC r262534, r262548, r262549, r262552, r262568, r262581, r262583, r262584,
r262585, r262587, r262696, r262712

Replace many pasted identical definitions of cpu_initclocks() with a common
implementation in arm/machdep.c.

aicasm: Don't complain about missing prototypes to ease bootstrap issues.

Vybrid: Add driver for Inter-Integrated Circuit (I2C).

imx6: Initialize the Low Power Mode bits to keep the ARM cores running
during WFI.

All our current ARM multi-core systems have all cores in one package with
a shared L2 cache, reflect that in the common cpu_topo() routine.

mpcore timer: Supply a DELAY() implementation via weak linkage, so that
SoC-specific code can supply a better implementation.

imx6: Add some rudimentary voltage control.

Add an armv7 implementation of cpu_sleep().

Add __used attribute 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.

MFC r261410

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

MFC r257199, r257200, r257217:

Remove all #include <machine/pmap.h> from arm code. It's already
included by vm/pmap.h, which is a prerequisite for arm/machine/pmap.h
so there's no reason to ever include it directly.

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.

Remove the last dregs of trapframe_t. It turns out only arm was using
this type, so remove it to make arm code more consistant with other
platforms.

MFC 275207:

We don't use the hypervisor interrupt, make it optional in the device tree.

Submitted by: Julien Grall <julien.grall AT linaro.org>

MFC 275208:

Some device tree configurations place the generic timer under the root
of the tree and not under simplebus. Update the driver to handle this.

Submitted by: Julien Grall <julien.grall AT linaro.org>

MFC r269594, r269596, r269597, r269598, r269605, r269606:

Set ofwbus and simplebus to attach during BUS_PASS_BUS.

Define names that drivers can use to adjust their position relative to
other drivers within a BUS_PASS

Adjust ofwbus and simplebus to attach at BUS_PASS_ORDER_MIDDLE, so that
a platform can attach some other bus first if necessary.

Set the pl310 L2 cache driver to attach during the middle of BUS_PASS_CPU.

Attach arm generic interrupt and timer drivers in the middle of
BUS_PASS_INTERRUPT and BUS_PASS_TIMER, respectively.

Add an arm option, ARM_DEVICE_MULTIPASS, used to opt-in to multi-pass
device attachment on arm platforms. If this is defined, nexus attaches
early in BUS_PASS_BUS, and other busses and devices attach later, in the
pass number they are set up for. Without it defined, nexus attaches in
BUS_PASS_DEFAULT and thus so does everything else, which is status quo.

MFC 264052, 264057, 264065, 264094, 264103, 264120

Actually save the mpcore clock frequency retrieved from fdt data.

imx6..
- Don't call sdhci_init_slot() until after handling the FDT properties
related to detecting card presence.
- Flag several sysctl variables as tunables.
- Rework the cpu frequency management code for imx6 to add "operating
points" and min/max frequency controls.

generic timer...
- Setup both secure and non-secure timer IRQs.
We don't know our ARM security state, so one of them will operate.
- Don't set frequency, since it's unpossible in non-secure state.
Only rely on DTS clock-frequency value or get clock from timer.

MFC r262534, r262548, r262549, r262552, r262568, r262581, r262583, r262584,
r262585, r262587, r262696, r262712

Replace many pasted identical definitions of cpu_initclocks() with a common
implementation in arm/machdep.c.

aicasm: Don't complain about missing prototypes to ease bootstrap issues.

Vybrid: Add driver for Inter-Integrated Circuit (I2C).

imx6: Initialize the Low Power Mode bits to keep the ARM cores running
during WFI.

All our current ARM multi-core systems have all cores in one package with
a shared L2 cache, reflect that in the common cpu_topo() routine.

mpcore timer: Supply a DELAY() implementation via weak linkage, so that
SoC-specific code can supply a better implementation.

imx6: Add some rudimentary voltage control.

Add an armv7 implementation of cpu_sleep().

Add __used attribute 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.

MFC r261410

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

MFC r257199, r257200, r257217:

Remove all #include <machine/pmap.h> from arm code. It's already
included by vm/pmap.h, which is a prerequisite for arm/machine/pmap.h
so there's no reason to ever include it directly.

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.

Remove the last dregs of trapframe_t. It turns out only arm was using
this type, so remove it to make arm code more consistant with other
platforms.