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This patch removes the need for a shared buffer between the EL3 and S-EL1
levels. We now use the CPU registers, x0-x7, while passing data between
the two levels. Since TLK is a 32-bit Trusted OS, tlkd has to unpack the
arguments in the x0-x7 registers. TLK in turn gets these values via r0-r7.
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

Add support to indicate size and end of assembly functions

In order for the symbol table in the ELF file to contain the size of
functions written in assembly, it is necessary to report it to the
assembler using the .size directive.

To fulfil the above requirements, this patch introduces an 'endfunc'
macro which contains the .endfunc and .size directives. It also adds
a .func directive to the 'func' assembler macro.

The .func/.endfunc have been used so the assembler can fail if
endfunc is omitted.

Fixes ARM-Software/tf-issues#295

Change-Id: If8cb331b03d7f38fe7e3694d4de26f1075b278fc
Signed-off-by: Kévin Petit <kevin.petit@arm.com>

Optimize the bakery lock implementation

Bug Fix: Fix checkpatch rule in Makefile

TLK dispatcher

Include TLK Dispatcher's documentation and add NVIDIA to the
Acknowledgements file. TLK is now a supported Trusted OS with
the Trusted Firmware.
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

This patch adds support to open/close secure sessions with Trusted
Apps and later send commands/events. Modify TLK_NUM_FID to indicate
the total number of FIDs available to the NS world.

Change-Id: I3f1153dfa5510bd44fc25f1fee85cae475b1abf1
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

This patch allows servicing of the non-secure world IRQs when the
CPU is in the secure world. Once the interrupt is handled, the
non-secure world issues the Resume FID to allow the secure payload
complete the preempted standard FID.

Change-Id: Ia52c41adf45014ab51d8447bed6605ca2f935587
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

This patch adds functionality to translate virtual addresses from
secure or non-secure worlds. This functionality helps Trusted Apps
to share virtual addresses directly and allows the NS world to
pass virtual addresses to TLK directly.

Change-Id: I77b0892963e0e839c448b5d0532920fb7e54dc8e
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

This patch registers NS memory buffer with the secure payload using
two different functions IDs - REGISTER_LOGBUF, REGISTER_REQBUF.

a. The SP uses the log-buffer to store its activity logs, in a
pre-decided format. This helps in debugging secure payload's issues.
b. The SP uses the req-buffer to get the parameters required by
sessions with Trusted Applications.

Change-Id: I6b0247cf7790524132ee0da24f1f35b1fccec5d5
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

TLK Dispatcher (tlkd) is based on the tspd and is the glue required
to run TLK as a Secure Payload with the Trusted Firmware.

Change-Id: I69e573d26d52342eb049feef773dd7d2a506f4ab
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

This patch removes the `owner` field in bakery_lock_t structure which
is the data structure used in the bakery lock implementation that uses
coherent memory. The assertions to protect against recursive lock
acquisition were based on the 'owner' field. They are now done based
on the bakery lock ticket number. These assertions are also added
to the bakery lock implementation that uses normal memory as well.

Change-Id: If4850a00dffd3977e218c0f0a8d145808f36b470

This patch optimizes the data structure used with the bakery lock
implementation for coherent memory to save memory and minimize memory
accesses. These optimizations were already part of the bakery lock
implementation for normal memory and this patch now implements
it for the coherent memory implementation as well. Also
included in the patch is a cleanup to use the do-while loop while
waiting for other contenders to finish choosing their tickets.

Change-Id: Iedb305473133dc8f12126726d8329b67888b70f1

The shell command used to list all files but the libc's ones
introduced in commit 95d5353c was incorrect. It was listing
subdirectories without referencing their parent directories.
This patch fixes it.

Also, the command used to invoke the checkpatch.pl script is now
printed when V=1.

Change-Id: Ie2f1e74f60d77e38c25e717cffa44ca03baec7b2

Add support for Juno r1 in the platform reset handler

Set group status of PPIs and SGIs correctly on GICv3 systems

For Juno r0, the platform reset handler needs to:
 - Implement the workaround for defect #831273
 - Increase the L2 Data and Tag RAM latencies for Cortex-A57.

Defect #831273 does not affect Juno r1. Also, the default value
for the L2 Tag RAM latency for Cortex-A57 is suitable on Juno r1.
The L2 Data RAM latency for Cortex-A57 still needs to be
increased, though.

This patch modifies the Juno platform reset handler to detect
the board revision and skip the unnecessary steps on Juno r1.
The behaviour on Juno r0 is unchanged.

Change-Id: I27542917223e680ef923ee860900806ffcd0357b

On a GICv2 system, the group status of PPIs and SGIs is set in the GICD_IGROUPR0
register. On a GICv3 system, if affinity routing is enabled for the non-secure
state, then the group status of PPIs and SGIs should be set in the GICR_IGROUPR0
register. ARM Trusted firmware sets the group status using the GICv2
sequence. On a GICv3 system, if the group status of an interrupt is set to Group
1 through a write to the GICD_IGROUPR0, then the GICR_IGROUPR0 is updated as
well.

The current sequence is incorrect since it first marks all PPIs and SGIs as
Group 1. It then clears the bits in GICD_IGROUPR0 corresponding to secure
interrupts to set their group status to Group 0. This operation is a no-op. It
leaves the secure generic timer interrupt (#29) used by the TSP marked as Group
1. This causes the interrupt to interfere with the execution of non-secure
software. Once an interrupt has been marked as Group 1, the GICR_IGROUPR0 should
be programmed to change its group status.

This patch rectifies this issue by setting the group status of only the
non-secure PPI and SGIs to Group 1 in the first place. GICD_IGROUPR0 resets to
0. So secure interrupts are marked as Group 0 by default.

Change-Id: I958b4b15f3e2b2444ce4c17764def36216498d00

Add support for ARM Cortex-A72 processor

This patch adds support for ARM Cortex-A72 processor in the CPU
specific framework.

Change-Id: I5986855fc1b875aadf3eba8c36e989d8a05e5175

TBB: remove PolarSSL SHA1 functions from the binary

Common driver for ARM cache coherent Interconnects

Initialise cpu ops after enabling data cache

Documentation fixes in 'make help' message and User Guide

Juno: Disable workaround for Cortex-A57 erratum #806969

TBB: fix build target 'all' dependency on certificates

Enable type-checking of arguments passed to printf() et al.

checkpatch: ignore GIT_COMMIT_ID

This patch updates the FVP and Juno platform ports to use the common
driver for ARM Cache Coherent Interconnects.

Change-Id: Ib142f456b9b673600592616a2ec99e9b230d6542

Even though both CCI-400 and CCI-500 IPs have different configurations
with respect to the number and types of supported interfaces, their
register offsets and programming sequences are similar. This patch
creates a common driver for enabling and disabling snoop transactions
and DVMs with both the IPs.

New platform ports which implement one of these IPs should use this
common driver. Existing platform ports which implement CCI-400 should
migrate to the common driver as the standalone CCI-400 will be
deprecated in the future.

Change-Id: I3ccd0eb7b062922d2e4a374ff8c21e79fa357556

This patch defines the ARRAY_SIZE macro for calculating number of elements
in an array and uses it where appropriate.

Change-Id: I72746a9229f0b259323972b498b9a3999731bc9b

The cpu-ops pointer was initialized before enabling the data cache in the cold
and warm boot paths. This required a DCIVAC cache maintenance operation to
invalidate any stale cache lines resident in other cpus.

This patch moves this initialization to the bl31_arch_setup() function
which is always called after the data cache and MMU has been enabled.

This change removes the need:
 1. for the DCIVAC cache maintenance operation.
 2. to initialise the CPU ops upon resumption from a PSCI CPU_SUSPEND
    call since memory contents are always preserved in this case.

Change-Id: Ibb2fa2f7460d1a1f1e721242025e382734c204c6

By default, the checkpatch script requires that commit references
included in commit messages follow a predefined format. Github
merge commits do not follow this convention, causing the code
style test to fail when a new pull request is created.

This patch adds the ignore GIT_COMMIT_ID option to the checkpatch
parameters. This flag indicates the tool to ignore the commit
message format.

Change-Id: I37133cc5cf803f664b8ff00f62d458b39f06918c

Cortex-A57 erratum #806969 applies to revision r0p0 of the CPU
but does not manifest itself on Juno r0. It is not applicable
to Juno r1 in any case.

This patch modifies the Juno platform Makefile to no longer
compile this erratum workaround in.

Change-Id: I32b16835b2ac897e639e869ab2b78b62a51a0139

Commit ea4ec3aa ("TBB: use SHA256 to generate the certificate
signatures") updated the cert_create tool to generate the
signatures using SHA256 instead of SHA1. Therefore, SHA1 is no
longer required.

This patch removes the SHA1 option from the PolarSSL configuration
file. The source file sha1.c is no longer needed and has been
excluded from the build. The SHA1 functions are no longer included
in the binary, reducing the memory footprint of BL1 and BL2 by
approximately 6 KB.

Change-Id: I72ea2cff03c0964c3eaadce148ec2ad2c6dde2e3

The 'libssl-dev' package must be installed on the host to build the
certificate generation tool. This patch adds it to the list of
required tools in the User Guide.

Change-Id: I018381fb14b7c2d2bd6f2b7929aaad0571f7eb2e

The message printed by 'make help' is incomplete. It doesn't
mention all relevant supported targets. This patch updates it.

The format of the first line of the help message has been changed
so that it no longer lists all supported targets. This eases the
maintenance as we don't need to update the list in 2 places
anymore whenever a new target is added.

Also add a reference to the user guide to get the list of
supported options.

Change-Id: I79d8b815b0ffc0c43b4c05124378fce0e938365c

This patch modifies the declarations of the functions printf() et al.
and adds the right GCC attribute to request the compiler to check
the type of the arguments passed to these functions against the given
format string. This will ensure that the compiler outputs warning
messages like the following whenever it detects an inconsistency:

 file.c:42: warning: format ‘%d’ expects type ‘int’, but argument 3 has type ‘long int’

It also fixes the type mismatch inconsistencies that it revealed
across the code base.

NOTE: THIS PATCH MAY FORCE PLATFORM PORTS OR SP/SPDS THAT USE THE
PRINTF FAMILY OF FUNCTIONS TO FIX ANY TYPE MISMATCH INCONSISTENCIES.

Change-Id: If36bb54ec7d6dd2cb4791d89b02a24ac13fd2df6

TBB: use SHA256 to generate the certificate signatures