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The BPMP firmware takes some time to initialise its state on exiting
System Suspend state. The CPU needs to synchronize with the BPMP during
this process to avoid any race conditions. This patch suspends and resumes
the BPMP interface across a System Suspend cycle, to fix this race.

Change-Id: I82a61d12ef3eee267bdd8d4386bed23397fbfd2d
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

This patch skips past the signature header added to the sc7entry-fw
binary by the previous level bootloader. Currently, the size of
the header is 1KB, so adjust the start address and the binary size
at the time of copy.

Change-Id: Id0494548009749035846d54df417a960c640c8f9
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

This patch uses the sc7entry-fw base/size values to calculate the
TZDRAM fence, so as to move sc7entry-fw inside the TZDRAM fence.

Change-Id: I91aeeeece857076c478cdc4c18a6ad70dc265031
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

This patch puts all the DMA masters in reset before starting the System
Suspend sequence. This helps us make sure that there are no rogue agents
in the system trying to over-write the SC7 Entry Firmware with their own.

Change-Id: I7eb39999d229951e612fbfeb9f86c4efb8f98b5a
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

This patch adds support to enter System Suspend on Tegra210 platforms
without the traditional BPMP firmware. The BPMP firmware will no longer
be supported on Tegra210 platforms and its functionality will be
divided across the CPU and sc7entry-fw.

The sc7entry-fw takes care of performing the hardware sequence required
to enter System Suspend (SC7 power state) from the COP. The CPU is required
to load this firmware to the internal RAM of the COP and start the sequence.
The CPU also make sure that the COP is off after cold boot and is only
powered on when we want to start the actual System Suspend sequence.

The previous bootloader loads the firmware to TZDRAM and passes its base and
size as part of the boot parameters. The EL3 layer is supposed to sanitize
the parameters before touching the firmware blob.

To assist the warmboot code with the PMIC discovery, EL3 is also supposed to
program PMC's scratch register #210, with appropriate values. Without these
settings the warmboot code wont be able to get the device out of System
Suspend.

Change-Id: I5a7b868512dbfd6cfefd55acf3978a1fd7ebf1e2
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

This patch removes support for powering down a CPU cluster on
Tegra210 platforms as none of them actually use it.

Change-Id: I9665634cf2b5b7b8a1b5a2700cae152dc9165fe3
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

This patch adds support to enter/exit to/from cluster idle power
state on Tegra210 platforms that do not load BPMP firmware.

The CPU initates the cluster idle sequence on the last standing
CPU, by following these steps:

Entry
-----
* stop other CPUs from waking up
* program the PWM pinmux to tristate for OVR PMIC
* program the flow controller to enter CC6 state
* skip L1 $ flush during cluster power down, as L2 $ is inclusive
  of L1 $ on Cortex-A57 CPUs

Exit
----
* program the PWM pinmux to un-tristate for OVR PMIC
* allow other CPUs to wake up

This patch also makes sure that cluster idle state entry is not
enabled until CL-DVFS is ready.

Change-Id: I54cf31bf72b4a09d9bf9d2baaed6ee5a963c7808
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

This patch returns error if BPMP initialization fails. The platform
code marks the cluster as "runnning" since we wont be able to get
it into the low power state without BPMP.

Change-Id: I86f51d478626240bb7b4ccede8907674290c5dc1
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

This patch saves the TZSRAM context and takes the SoC into System Suspend
from the "_wfi" handler. This helps us save the entire CPU context from
the TZSRAM, before entering System Suspend. In the previous implementation
we missed saving some part of the state machine context leading to an assert
on System Suspend exit.

Change-Id: I4895a8b4a5e3c3e983c245746ea388e42da8229c
Signed-off-by: Harvey Hsieh <hhsieh@nvidia.com>

This patch enables L2 error correction and parity protection
for Tegra210 on boot and exit from suspend. The previous bootloader
sets the boot parameter, indicating ECC reporting, only for B01 SKUs.

Change-Id: I6927884d375a64c69e2f1e9aed85f95c5e3cb17c
Signed-off-by: Sam Payne <spayne@nvidia.com>

This patch adds the driver to communicate with the BPMP processor
for power management use cases. BPMP controls the entry into cluster
and system power states. The Tegra210 platform port queries the BPMP
to calculate the target state for the cluster. In case BPMP does not
allow CCx entry, the core enters a power down state.

Change-Id: I9c40aef561607a0b02c49b7f8118570eb9105cc9
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

This patch adds the implementation of the SE atomic context save
sequence. The atomic context-save consistently saves to the TZRAM
carveout; thus there is no need to declare context save buffer or
map MMU region in TZRAM for context save. The atomic context-save
routine is responsible to validate the context-save progress
counter, where CTX_SAVE_CNT=133(SE1)/646(SE2), and the SE error
status to ensure the context save procedure complete successfully.

Change-Id: Ic80843902af70e76415530266cb158f668976c42
Signed-off-by: Marvin Hsu <marvinh@nvidia.com>
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

Enforce full include path for includes. Deprecate old paths.

The following folders inside include/lib have been left unchanged:

- include/lib/cpus/${ARCH}
- include/lib/el3_runtime/${ARCH}

The reason for this change is that having a global namespace for
includes isn't a good idea. It defeats one of the advantages of having
folders and it introduces problems that are sometimes subtle (because
you may not know the header you are actually including if there are two
of them).

For example, this patch had to be created because two headers were
called the same way: e0ea0928 ("Fix gpio includes of mt8173 platform
to avoid collision."). More recently, this patch has had similar
problems: 46f9b2c3 ("drivers: add tzc380 support").

This problem was introduced in commit 4ecca339

 ("Move include and
source files to logical locations"). At that time, there weren't too
many headers so it wasn't a real issue. However, time has shown that
this creates problems.

Platforms that want to preserve the way they include headers may add the
removed paths to PLAT_INCLUDES, but this is discouraged.

Change-Id: I39dc53ed98f9e297a5966e723d1936d6ccf2fc8f
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>

This fix modifies the order of system includes to meet the ARM TF coding
standard. There are some exceptions to this change in order to retain
header groupings and where there are headers within #if statements.

Change-Id: Ib5b668c992d817cc860e97b29e16ef106d17e404
Signed-off-by: Isla Mitchell <isla.mitchell@arm.com>

This patch enables the 'sign-compare' flag, to enable warning/errors
for comparisons between signed/unsigned variables. The warning has
been enabled for all the Tegra platforms, to start with.
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

To make software license auditing simpler, use SPDX[0] license
identifiers instead of duplicating the license text in every file.

NOTE: Files that have been imported by FreeBSD have not been modified.

[0]: https://spdx.org/



Change-Id: I80a00e1f641b8cc075ca5a95b10607ed9ed8761a
Signed-off-by: dp-arm <dimitris.papastamos@arm.com>

This patch implements the handler to calculate the cluster and
system power states for the Tegra210 SoC. The power states
returned by this handler are used by the PSCI library to decide
cache maintenance operations - cluster v cpu.

Change-Id: I93e4139d4cd8a086b51f328e9a76e91428ebcdab
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

The linux kernel v3.10 does not use System Suspend function ID, whereas
v4.4 uses it. This means affinity levels 0/1 will have different state id
values during System Suspend entry. This patch updates the assert criteria
to check both the state id values.

Change-Id: I07fcaf99501cc9622e40d0a2c1eb4a4a160be10a
Signed-off-by: Harvey Hsieh <hhsieh@nvidia.com>
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

This patch sets the core power state during cluster power down,
so that the 'get_target_pwr_state' handler can calculate the
proper states for all the affinity levels.

Change-Id: If4adb001011208916427ee1623c6c923bed99985
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

This patch uses the Memory controller driver's handler to restore
its settings and moves the other chip specific code to their own
'pwr_domain_on_finish' handlers.

Change-Id: I3c9d23bdab9e2e3c05034ff6812cf941ccd7a75e
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

This patch enables the PSCI_EXTENDED_STATE_ID macro. Tegra platforms
have moved on to using the extended state ID for CPU_SUSPEND, where
the NS world passes the state ID and wakeup time as part of the
state ID field.

Change-Id: Ie8b0fec285d8b2330bc26ff239a4f628425c9fcf
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

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>

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>

The Memory Select Switch Controller routes any CPU transactions to
the appropriate slave depending on the transaction address. During
system suspend, it loses all config settings and hence the CPU has
to restore them during resume.

This patch restores the controller's settings for enabling WRAP to
INCR burst type conversions on the master ports, for any incoming
requests from the AXI slave ports.

Tested by performing multiple system suspend cycles.
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

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>

This patch de-asserts the CPU reset signals for each CPU as
part of it's power on sequence. This is needed to get rid of
the wait in BPMP firmware during SC7 exit.
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

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>

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>