Migrate platform makefile to new console driver location ...

This patch migrates the upstream platform makefiles to include the
console drivers from the new location in ARM Trusted Firmware code
base.

Change-Id: I866d6c4951e475de1f836ce8a8c1d5e6da9577e3

Include `plat_psci_common.c` from the new location ...

The `plat_psci_common.c` was moved to the new location `plat/common`
and a stub file was retained at previous location for compatibility. This
patch modifies the platform makefiles to include the file from the new
location.

Change-Id: Iabddeeb824e9a5d72d176d7c644735966c8c0699

Migrate platform ports to the new xlat_tables library ...

This patch modifies the upstream platform port makefiles to use the new
xlat_tables library files. This patch also makes mmap region setup common
between AArch64 and AArch32 for FVP platform port. The file `fvp_common.c`
is moved from the `plat/arm/board/fvp/aarch64` folder to the parent folder
as it is not specific to AArch64.

Change-Id: Id2e9aac45e46227b6f83cccfd1e915404018ea0b

Disable PL011 UART before configuring it ...

The PL011 TRM (ARM DDI 0183G) specifies that the UART must be
disabled before any of the control registers are programmed. The
PL011 driver included in TF does not disable the UART, so the
initialization in BL2 and BL31 is violating this requirement
(and potentially in BL1 if the UART is enabled after reset).

This patch modifies the initialization function in the PL011
console driver to disable the UART before programming the
control registers.

Register clobber list and documentation updated.

Fixes ARM-software/tf-issues#300

Change-Id: I839b2d681d48b03f821ac53663a6a78e8b30a1a1

Tegra: remove support for legacy platform APIs ...

This patch modifies the Tegra port to support the new platform
APIs so that we can disable the compat layer. This includes
modifications to the power management and platform topology code.

Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

Tegra: flowctrl: rename tegra_fc_cpu_idle() to tegra_fc_cpu_powerdn() ...

This patch renames the tegra_fc_cpu_idle() function to a more appropriate
tegra_fc_cpu_powerdn() to better reflect its usage.

Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

Tegra: introduce per-soc system reset handler ...

This patch adds a per-soc system reset handler for Tegra chips. The
handler gets executed before the actual system resets. This allows
for custom handling of the system reset sequence on each SoC.

Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

Tegra: Perform cache maintenance on video carveout memory ...

Currently, the non-overlapping video memory carveout region is cleared after
disabling the MMU at EL3. If at any exception level the carveout region is being
marked as cacheable, this zeroing of memory will not have an affect on the
cached lines. Hence, we first invalidate the dirty lines and update the memory
and invalidate again so that both caches and memory is zeroed out.

Change-Id: If3b2d139ab7227f6799c0911d59e079849dc86aa

Tegra: fix logic to clear videomem regions ...

The previous logic in the memctrl driver was not catering to cases
where the new memory region lied inside the older region. This patch
fixes the if/elseif/elseif logic in the driver to take care of this
case.

Reported by: Vikram Kanigiri <vikram.kanigiri@arm.com>
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

Tegra210: wait for 512 timer ticks before retention entry ...

This patch programs the CPUECTLR_EL1 and L2ECTLR_EL1 registers,
so that the core waits for 512 generic timer CNTVALUEB ticks before
entering retention state, after executing a WFI instruction.

This functionality is configurable and can be enabled for platforms
by setting the newly defined 'ENABLE_L2_DYNAMIC_RETENTION' and
'ENABLE_CPU_DYNAMIC_RETENTION' flag.

Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

Tegra: memmap the actual memory available for BL31 ...

On Tegra SoCs, the TZDRAM contains the BL31 and BL32 images. This patch
uses only the actual memory available for BL31 instead of mapping the
entire TZDRAM.

Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

Tegra: retrieve BL32's bootargs from bl32_ep_info ...

This patch removes the bootargs pointer from the platform params
structure. Instead the bootargs are passed by the BL2 in the
bl32_ep_info struct which is a part of the EL3 params struct.

Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

Tegra: Support for Tegra's T132 platforms ...

This patch implements support for T132 (Denver CPU) based Tegra
platforms.

The following features have been added:

* SiP calls to switch T132 CPU's AARCH mode
* Complete PSCI support, including 'System Suspend'
* Platform specific MMIO settings
* Locking of CPU vector registers

Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

Tegra: implement per-SoC validate_power_state() handler ...

The validate_power_state() handler checks the power_state for a valid afflvl
and state id. Although the afflvl check is common, the state ids are implementation
defined.

This patch moves the handler to the tegra/soc folder to allow each SoC to validate
the power_state for supported parameters.

Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

Tegra: T210: include CPU files from SoC's platform.mk ...

This patch moves the inclusion of CPU code (A53, A57) to T210's
makefile. This way we can reduce code size for Tegra platforms by
including only the required CPU files.

Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

Tegra: Introduce config for enabling NS access to L2/CPUECTRL regs ...

A new config, ENABLE_NS_L2_CPUECTRL_RW_ACCESS, allows Tegra platforms to
enable read/write access to the L2 and CPUECTRL registers. T210 is the
only platform that needs to enable this config for now.

Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

Tegra: PMC: lock SCRATCH22 register ...

The PMC Scratch22 register contains the CPU reset vector to
be used by the warmboot code to power up the CPU while resuming
from  system suspend. This patch locks this PMC register to avoid
any further writes.

Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

Tegra: PMC: check if a CPU is already online ...

This patch checks if the target CPU is already online before
proceeding with it's power ON sequence.

Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

Tegra: Fix the delay loop used during SC7 exit ...

This patch fixes the delay loop used to wake up the BPMP during SC7 exit.
The earlier loop would fail just when the timer was about to wrap-around
(e.g. when TEGRA_TMRUS_BASE is 0xfffffffe, the target value becomes 0,
which would cause the loop to exit before it's expiry).

Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

Tegra: introduce delay timer support ...

This patch introduces the backend required for implementing the delay
timer API. Tegra has an on-chip free flowing us timer which can be
used as the delay timer.

Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

Tegra: Exclude coherent memory region from memory map ...

This patch sets the 'USE_COHERENT_MEM' flag to '0', so that the
coherent memory region will not be included in the memory map.

Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

Implement get_sys_suspend_power_state() handler for Tegra ...

This patch implements the get_sys_suspend_power_state() handler required by
the PSCI SYSTEM_SUSPEND API. The intent of this handler is to return the
appropriate State-ID field which can be utilized in `affinst_suspend()` to
suspend to system affinity level.

Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

Add missing features to the Tegra GIC driver ...

In order to handle secure/non-secure interrupts, overload the plat_ic_*
functions and copy GIC helper functions from arm_gic.c. Use arm_gic.c
as the reference to add Tegra's GIC helper functions.

Now that Tegra has its own GIC implementation, we have no use for
plat_gic.c and arm_gic.c files.

Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

Merge pull request #319 from vwadekar/tegra-video-mem-aperture-v3 ...

Reserve a Video Memory aperture in DRAM memory

Reserve a Video Memory aperture in DRAM memory ...

This patch adds support to reserve a memory carveout region in the
DRAM on Tegra SoCs. The memory controller provides specific registers
to specify the aperture's base and size. This aperture can also be
changed dynamically in order to re-size the memory available for
DRM video playback. In case of the new aperture not overlapping
the previous one, the previous aperture has to be cleared before
setting up the new one. This means we do not "leak" any video data
to the NS world.

Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

Boot Trusted OS' on Tegra SoCs ...

This patch adds support to run a Trusted OS during boot time. The
previous stage bootloader passes the entry point information in
the 'bl32_ep_info' structure, which is passed over to the SPD.

The build system expects the dispatcher to be passed as an input
parameter using the 'SPD=<dispatcher>' option. The Tegra docs have
also been updated with this information.

Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

Support for NVIDIA's Tegra T210 SoCs ...

T210 is the latest chip in the Tegra family of SoCs from NVIDIA. It is an
ARM v8 dual-cluster (A57/A53) SoC, with any one of the clusters being active
at a given point in time.

This patch adds support to boot the Trusted Firmware on T210 SoCs. The patch
also adds support to boot secondary CPUs, enter/exit core power states for
all CPUs in the slow/fast clusters. The support to switch between clusters
is still not available in this patch and would be available later.

Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>