Introduce locking primitives using CAS instruction ...

The ARMv8v.1 architecture extension has introduced support for far
atomics, which includes compare-and-swap. Compare and Swap instruction
is only available for AArch64.

Introduce build options to choose the architecture versions to target
ARM Trusted Firmware:

  - ARM_ARCH_MAJOR: selects the major version of target ARM
    Architecture. Default value is 8.

  - ARM_ARCH_MINOR: selects the minor version of target ARM
    Architecture. Default value is 0.

When:

  (ARM_ARCH_MAJOR > 8) || ((ARM_ARCH_MAJOR == 8) && (ARM_ARCH_MINOR >= 1)),

for AArch64, Compare and Swap instruction is used to implement spin
locks. Otherwise, the implementation falls back to using
load-/store-exclusive instructions.

Update user guide, and introduce a section in Firmware Design guide to
summarize support for features introduced in ARMv8 Architecture
Extensions.

Change-Id: I73096a0039502f7aef9ec6ab3ae36680da033f16
Signed-off-by: Jeenu Viswambharan <jeenu.viswambharan@arm.com>

Migrate to Linaro Release 16.12 ...

This Linaro release updates both the binaries and the toolchain:
Linaro binaries upgraded 16.06 --> 16.12
AArch64 compiler upgraded 15.05 (gcc 4.9) --> 5.3-2015.05 (gcc 5.3)
AArch32 compiler upgraded 15.05 (gcc 4.9) --> 5.3-2015.05 (gcc 5.3)

The ARM TF codebase has been tested against these new binaries. This patch
updates the User Guide to reflect that the 16.12 release is now a supported
Linaro Release.

Change-Id: I6247e820f591df7d05df4f622ee45a3abf2c2d72
Signed-off-by: David Cunado <david.cunado@arm.com>

Merge pull request #826 from dp-arm/dp/psci-stat-abstraction ...

Decouple PSCI stat residency calculation from PMF

PSCI: Decouple PSCI stat residency calculation from PMF ...

This patch introduces the following three platform interfaces:

* void plat_psci_stat_accounting_start(const psci_power_state_t *state_info)

  This is an optional hook that platforms can implement in order
  to perform accounting before entering a low power state.  This
  typically involves capturing a timestamp.

* void plat_psci_stat_accounting_stop(const psci_power_state_t *state_info)

  This is an optional hook that platforms can implement in order
  to perform accounting after exiting from a low power state.  This
  typically involves capturing a timestamp.

* u_register_t plat_psci_stat_get_residency(unsigned int lvl,
	const psci_power_state_t *state_info,
	unsigned int last_cpu_index)

  This is an optional hook that platforms can implement in order
  to calculate the PSCI stat residency.

If any of these interfaces are overridden by the platform, it is
recommended that all of them are.

By default `ENABLE_PSCI_STAT` is disabled.  If `ENABLE_PSCI_STAT`
is set but `ENABLE_PMF` is not set then an alternative PSCI stat
collection backend must be provided.  If both are set, then default
weak definitions of these functions are provided, using PMF to
calculate the residency.

NOTE: Previously, platforms did not have to explicitly set
`ENABLE_PMF` since this was automatically done by the top-level
Makefile.

Change-Id: I17b47804dea68c77bc284df15ee1ccd66bc4b79b
Signed-off-by: dp-arm <dimitris.papastamos@arm.com>

Update AEM and Cortex Models versions ...

AEMv8-A Model release v8.2 has been made available and Trusted Firmware
has been tested against these versions as part of its CI system. This
patch updates the user guide documentation to reflect the version of AEM
and Cortex Models that Trusted Firmware has been tested against.

Also, the Linaro Release Notes link was broken and this patch updates the
link.

Change-Id: I88729cef909a69fff629036f480fd6168ad7dc9a
Signed-off-by: David Cunado <david.cunado@arm.com>

user-guide.md: Fix FVP references ...

The current user guide mentions that Foundation model doesn't support
debugger interface. Clarify that all FVPs support --cadi-server option
such that a CADI-compliant debugger can connect to and control model
execution.

Also fix broken URL to FVP home page.

Change-Id: Ia14d618a4e0abb4b228eb1616040f9b51fb3f6f9
Signed-off-by: Jeenu Viswambharan <jeenu.viswambharan@arm.com>

Update Foundation Model version ...

Foundation Model release 10.2 has been made available and Trusted
Firmware has been tested against that it as part of its CI system.

This patch updates the user guide documentation to reflect the version
of Foundation Model that Trusted Firmware has been tested against.

Change-Id: I8571e1027b24892b41d04b93b24245a371ca2cae
Signed-off-by: David Cunado <david.cunado@arm.com>

Docs: Fix monospace formatting in user guide ...

Change-Id: I28b2790ff2f87b9fe3cf1020e59e1e0a00be6f97
Signed-off-by: Jeenu Viswambharan <jeenu.viswambharan@arm.com>

Clarify dependency for PSCI_EXTENDED_STATE_ID ...

Add dependency information in the user guide for ARM_RECOM_STATE_ID_ENC
that needs to be set when using PSCI_EXTENDED_STATE_ID on ARM
platforms. Also clarify the build error message.

Change-Id: Id125a0299b179f5f222bca4e2503204bf89a3c59
Signed-off-by: Douglas Raillard <douglas.raillard@arm.com>

docs: Reorder build options alphabetically ...

At present, build options in the user guide aren't listed in any
specific order. Ordering them alphabetically is a standard practice, and
is also easier on the reader.

Contents unchanged.

Change-Id: Ibc36f3a2a576edb86c1a402430d2ef5adcb2f144
Signed-off-by: Jeenu Viswambharan <jeenu.viswambharan@arm.com>

user guide: Document `ENABLE_RUNTIME_INSTRUMENTATION` option ...

Change-Id: I8e50df67e860b9589834445761a7b9927690fdce
Signed-off-by: dp-arm <dimitris.papastamos@arm.com>

Release v1.3: Minor updates to user guide ...

Updated the user guide to clarify building FIP for AArch32.
The instructions were previously specific to building a FIP for AArch64.

Change-Id: I7bd1a6b8e810cfda411f707e04f479006817858e
Signed-off-by: David Cunado <david.cunado@arm.com>

Merge pull request #731 from danh-arm/an/fix-juno-doc ...

Fix documentation of bootwrapper boot on juno

Fix documentation of bootwrapper boot on juno ...

The user guide incorrectly claimed that it is possible to load a
bootwrapped kernel over JTAG on Juno in the same manner as an EL3
payload. In the EL3 payload boot flow, some of the platform
initialisations in BL2 are modified. In particular, the TZC settings
are modified to allow unrestricted access to DRAM. This in turn allows
the debugger to access the DRAM and therefore to load the image there.

In the BL33-preloaded boot flow though, BL2 uses the default TZC
programming, which prevent access to most of the DRAM from secure state.
When execution reaches the SPIN_ON_BL1_EXIT loop, the MMU is disabled
and thus DS-5 presumably issues secure access transactions while trying
to load the image, which fails.

One way around it is to stop execution at the end of BL2 instead. At
this point, the MMU is still enabled and the DRAM is mapped as
non-secure memory. Therefore, the debugger is allowed to access this
memory in this context and to sucessfully load the bootwrapped kernel in
DRAM. The user guide is updated to suggest this alternative method.

Co-Authored-By: Sandrine Bailleux <sandrine.bailleux@arm.com>
Signed-off-by: Dan Handley <dan.handley@arm.com>

Change-Id: I537ea1c6d2f96edc06bc3f512e770c748bcabe94

AArch32: Update user-guide and add DTBs ...

This patch adds necessary updates for building and running Trusted
Firmware for AArch32 to user-guide.md. The instructions for running
on both `FVP_Base_AEMv8A-AEMv8A` in AArch32 mode and
`FVP_Base_Cortex-A32x4` models are added. The device tree files for
AArch32 Linux kernel are also added in the `fdts` folder.

Change-Id: I0023b6b03e05f32637cb5765fdeda8c8df2d0d3e

Merge pull request #718 from sandrine-bailleux-arm/sb/update-deps-v1.3 ...

Upgrade Linaro release, FVPs and mbed TLS versions

Upgrade Linaro release, FVPs and mbed TLS versions ...

This patch updates the User Guide to recommend the latest version
of some of the software dependencies of ARM Trusted Firmware.

 - Upgrade Linaro release:     16.02 -> 16.06

 - Upgrade FVPs
    - Foundation v8 FVP:       9.5 -> 10.1
    - Base FVPs:               7.6 -> 7.7

 - Upgrade mbed TLS library:   2.2.0 -> 2.2.1

Note that the latest release of mbed TLS as of today is 2.3.0 but it has
compilations issues with the set of library configuration options that
Trusted Firmware uses. 2.2.1 is the next most recent release known to
build with TF.

This patch also fixes the markdown formatting of a link in the
User Guide.

Change-Id: Ieb7dd336f4d3110fba060afec4ad580ae707a8f1

Add new version of image loading. ...

This patch adds capability to load BL images based on image
descriptors instead of hard coded way of loading BL images.
This framework is designed such that it can be readily adapted
by any BL stage that needs to load images.

In order to provide the above capability the following new
platform functions are introduced:

  bl_load_info_t *plat_get_bl_image_load_info(void);
    This function returns pointer to the list of images that the
    platform has populated to load.

  bl_params_t *plat_get_next_bl_params(void);
    This function returns a pointer to the shared memory that the
    platform has kept aside to pass trusted firmware related
    information that next BL image needs.

  void plat_flush_next_bl_params(void);
    This function flushes to main memory all the params that
    are passed to next image.

  int bl2_plat_handle_post_image_load(unsigned int image_id)
    This function can be used by the platforms to update/use
    image information for given `image_id`.

`desc_image_load.c` contains utility functions which can be used
by the platforms to generate, load and executable, image list
based on the registered image descriptors.

This patch also adds new version of `load_image/load_auth_image`
functions in-order to achieve the above capability.

Following are the changes for the new version as compared to old:
  - Refactor the signature and only keep image_id and image_info_t
    arguments. Removed image_base argument as it is already passed
    through image_info_t. Given that the BL image base addresses and
    limit/size are already provided by the platforms, the meminfo_t
    and entry_point_info arguments are not needed to provide/reserve
    the extent of free memory for the given BL image.

  - Added check for the image size against the defined max size.
    This is needed because the image size could come from an
    unauthenticated source (e.g. the FIP header).
    To make this check, new member is added to the image_info_t
    struct for identifying the image maximum size.

New flag `LOAD_IMAGE_V2` is added in the Makefile.
Default value is 0.

NOTE: `TRUSTED_BOARD_BOOT` is currently not supported when
      `LOAD_IMAGE_V2` is enabled.

Change-Id: Ia7b643f4817a170d5a2fbf479b9bc12e63112e79

fiptool: Add support for printing the sha256 digest with info command ...

This feature allows one to quickly verify that the expected
image is contained in the FIP without extracting the image and
running sha256sum(1) on it.

The sha256 digest is only shown when the verbose flag is used.

This change requires libssl-dev to be installed in order to build
Trusted Firmware. Previously, libssl-dev was optionally needed only
to support Trusted Board Boot configurations.

Fixes ARM-Software/tf-issues#124

Change-Id: Ifb1408d17f483d482bb270a589ee74add25ec5a6

Merge pull request #678 from soby-mathew/sm/PSCI_AArch32 ...

Introduce AArch32 support for PSCI library

Move up to Base FVP version 7.6 ...

This patch updates the User Guide to move up from version 7.2 to 7.6
of the Base FVP.

Change-Id: I792b2250deb4836266e14b40992ae59a5ab5f729

AArch32: Enable build at top level Makefile for FVP ...

This patch enables the AArch32 build including SP_MIN in the
top level Makefile. The build flag `ARCH` now can specify either
`aarch64`(default) or `aarch32`. Currently only FVP AEM model is
supported for AArch32 build. Another new build flag `AARCH32_SP`
is introduced to specify the AArch32 secure payload to be built.

Change-Id: Ie1198cb9e52d7da1b79b93243338fc3868b08faa

Merge pull request #661 from dp-arm/master ...

Replace fip_create with fiptool

Replace fip_create with fiptool ...

fiptool provides a more consistent and intuitive interface compared to
the fip_create program.  It serves as a better base to build on more
features in the future.

fiptool supports various subcommands.  Below are the currently
supported subcommands:

1) info   - List the images contained in a FIP file.
2) create - Create a new FIP file with the given images.
3) update - Update an existing FIP with the given images.
4) unpack - Extract a selected set or all the images from a FIP file.
5) remove - Remove images from a FIP file.  This is a new command that
   was not present in fip_create.

To create a new FIP file, replace "fip_create" with "fiptool create".

To update a FIP file, replace "fip_create" with "fiptool update".

To dump the contents of a FIP file, replace "fip_create --dump" with
"fiptool info".

A compatibility script that emulates the basic functionality of
fip_create is provided.  Existing scripts might or might not work with
the compatibility script.  Users are strongly encouraged to migrate to
fiptool.

Fixes ARM-Software/tf-issues#87
Fixes ARM-Software/tf-issues#108
Fixes ARM-Software/tf-issues#361

Change-Id: I7ee4da7ac60179cc83cf46af890fd8bc61a53330

Merge pull request #668 from sandrine-bailleux-arm/sb/rodata-xn-doc ...

Documentation for SEPARATE_CODE_AND_RODATA build flag

Documentation for SEPARATE_CODE_AND_RODATA build flag ...

This patch documents the effect, cost and benefits of the
SEPARATE_CODE_AND_RODATA build flag.

Change-Id: Ic8daf0563fa6335930ad6c70b9c35f678e84d39d

ARM platforms: Define common image sizes ...

Compile option `ARM_BOARD_OPTIMISE_MMAP` has been renamed to
`ARM_BOARD_OPTIMISE_MEM` because it now applies not only to defines
related to the translation tables but to the image size as well.

The defines `PLAT_ARM_MAX_BL1_RW_SIZE`, `PLAT_ARM_MAX_BL2_SIZE` and
`PLAT_ARM_MAX_BL31_SIZE` have been moved to the file board_arm_def.h.
This way, ARM platforms no longer have to set their own values if
`ARM_BOARD_OPTIMISE_MEM=0` and they can specify optimized values
otherwise. The common sizes have been set to the highest values used
for any of the current build configurations.

This is needed because in some build configurations some images are
running out of space. This way there is a common set of values known
to work for all of them and it can be optimized for each particular
platform if needed.

The space reserved for BL2 when `TRUSTED_BOARD_BOOT=0` has been
increased. This is needed because when memory optimisations are
disabled the values for Juno of `PLAT_ARM_MMAP_ENTRIES` and
`MAX_XLAT_TABLES` are higher. If in this situation the code is
compiled in debug mode and with "-O0", the code won't fit.

Change-Id: I70a3d8d3a0b0cad1d6b602c01a7ea334776e718e

Add optional PSCI STAT residency & count functions ...

This patch adds following optional PSCI STAT functions:

- PSCI_STAT_RESIDENCY: This call returns the amount of time spent
  in power_state in microseconds, by the node represented by the
  `target_cpu` and the highest level of `power_state`.

- PSCI_STAT_COUNT: This call returns the number of times a
  `power_state` has been used by the node represented by the
  `target_cpu` and the highest power level of `power_state`.

These APIs provides residency statistics for power states that has
been used by the platform. They are implemented according to v1.0
of the PSCI specification.

By default this optional feature is disabled in the PSCI
implementation. To enable it, set the boolean flag
`ENABLE_PSCI_STAT` to 1. This also sets `ENABLE_PMF` to 1.

Change-Id: Ie62e9d37d6d416ccb1813acd7f616d1ddd3e8aff

Add Performance Measurement Framework(PMF) ...

This patch adds Performance Measurement Framework(PMF) in the
ARM Trusted Firmware. PMF is implemented as a library and the
SMC interface is provided through ARM SiP service.

The PMF provides capturing, storing, dumping and retrieving the
time-stamps, by enabling the development of services by different
providers, that can be easily integrated into ARM Trusted Firmware.
The PMF capture and retrieval APIs can also do appropriate cache
maintenance operations to the timestamp memory when the caller
indicates so.

`pmf_main.c` consists of core functions that implement service
registration, initialization, storing, dumping and retrieving
the time-stamp.
`pmf_smc.c` consists SMC handling for registered PMF services.
`pmf.h` consists of the macros that can be used by the PMF service
providers to register service and declare time-stamp functions.
`pmf_helpers.h` consists of internal macros that are used by `pmf.h`

By default this feature is disabled in the ARM trusted firmware.
To enable it set the boolean flag `ENABLE_PMF` to 1.

NOTE: The caller is responsible for specifying the appropriate cache
maintenance flags and for acquiring/releasing appropriate locks
before/after capturing/retrieving the time-stamps.

Change-Id: Ib45219ac07c2a81b9726ef6bd9c190cc55e81854

Merge pull request #636 from soby-mathew/sm/cpu_ctx_rem_aarch32_regs ...

Build option to include AArch32 registers in cpu context