This patch contains the barebox implementation for the ARM
"Power State Coordination Interface" (PSCI).

The interface is aimed at the generalization of code in the following
power management scenarios:
* Core idle management.
* Dynamic addition and removal of cores, and secondary core boot.
* big.LITTLE migration.
* System shutdown and reset.

In practice, all that's currently implemented is a way to enable the
secondary core one some SoCs.

With PSCI the Kernel is either started in nonsecure or in Hypervisor
mode and PSCI is used to apply power to the secondary cores.

The start mode is passed in the global.bootm.secure_state variable. This
enum can contain "secure" (Kernel is started in secure mode, means no
PSCI), "nonsecure" (Kernel is started in nonsecure mode, PSCI available)
or "hyp" (Kernel is started in hyp mode, meaning it can support
virtualization).

We currently only support putting the secure monitor code into SDRAM,
which means we always steal some amount of memory from the Kernel.
To keep things simple for now we simply keep the whole barebox binary in
memory

The PSCI support has been tested on i.MX7 only so far. The only
supported operations are CPU_ON and CPU_OFF.

The PSCI and secure monitor code is based on the corresponding U-Boot
code.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Hi Sascha,
I've made the changes you suggested in this resent patch.

Everything related to custom ATAGs has been moved to the board
directory.

The generic code does not make any references to feature lists or
bootloader versions.

About the setup_feature_list prototype:
 it has been renamed to atag_appender
 it's not a function, it's a pointer to a function. Can it have a
prototype other than it's own declaration?

All non-related changes has been dropped. They were checkpatch.pl
warnings unrelated to this patch.

Regards,
  Vicente.

Signed-off-by: Vicente Bergas <vicencb@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

We need inline versions of armlinux_set* exactly when
CONFIG_ARM_LINUX is not set, because this is the symbol
used to compile the non inline versions.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

whoever calls this function is not necessarily aware of a struct
image_data, so remove the dependency from the function.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

We want to use the memory banks later in the MMU which is
independent of Linux, so move this to a location which is
always compiled.

Also, make the memory bank list global and add an iterator
for it.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

this will automaticaly register the device to armlinux_add_dram

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

This can be shared between the different boot commands.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Also, make it a static inline function if compiled without
arm linux support.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Revision info required for some boards at boot time.
Only adds if the system_rev has been set to non-zero.

Signed-off-by: Marc Reilly <marc@cpdesign.com.au>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Move platform independent header files to arch/arm/include/asm, leaving
those in asm/arch* and asm/proc* alone.

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>