Update contributing.md with new integration process ...

Contributions will now be merged into an ARM Trusted Firmware
integration branch on GitHub instead of via an ARM internal
branch.

Fix build failure due to a typo in TSPD code ...

This patch fixes a build failure when TSPD support is included. The failure was
due to a missing semi-colon at the end of a C statement in tspd_common.c

Change-Id: I8fbd0d500bd9145b15f862b8686e570b80fcce8c

Build system: Trigger dependency checking only for build targets ...

The Makefile used to specify a blacklist of rules for which
dependency checking must not be triggered.  This list included
cleaning rules only, whereas all other non-build targets (e.g.
help, checkpatch, etc.) should also be included.

This approach seems a bit fragile because it is easy to forget
some non-building rules in the blacklist, as the experience
showed us.  It is more robust to specify a whitelist of rules
for which dependency checking is required.

Fixes ARM-software/tf-issues#112

Change-Id: I030c405abb35972a726a5200396430316d18f963

Initialise UART console in all bootloader stages ...

This patch reworks the console driver to ensure that each bootloader stage
initializes it independently. As a result, both BL3-1 and BL2 platform code
now calls console_init() instead of relying on BL1 to perform console setup

Fixes ARM-software/tf-issues#120

Change-Id: Ic4d66e0375e40a2fc7434afcabc8bbb4715c14ab

Move console functions out of pl011.c ...

This commit isolates the accessor functions in pl011.c and builds
a wrapper layer for console functions.

This also modifies the console driver to use the pl011 FIFO.

Fixes ARM-software/tf-issues#63

Change-Id: I3b402171cd14a927831bf5e5d4bb310b6da0e9a8

Build system: Remove last traces of 'PLAT=all' ...

It used to be possible to build all bootloader binaries for all platforms 
using 'PLAT=all'. This feature has been removed but there are still some 
traces of its existence. This patch removes them.

Change-Id: Ic671a5c20c5b64acbd0a912d2e4db8f9d9574610

Fix build by correcting asm helper function usage in TSPD ...

This patch fixes a regression failure due to the use of functions by the 
TSPD code which access system registers with partially qualified names. 
These functions had been removed in an earlier patch. The relevant code 
has been updated to access these registers with their fully qualified 
names.

Fixes ARM-software/tf-issues#119

Change-Id: Ide1bc5036e1b8164a42f7b7fe86186ad860e0ef9

Separate out BL2, BL3-1 and BL3-2 early exception vectors from BL1 ...

bl1/aarch64/early_exceptions.S used to be re-used by BL2, BL3-1 and
BL3-2.  There was some early SMC handling code in there that was not
required by the other bootloader stages.  Therefore this patch
introduces an even simpler exception vector source file for BL2,
BL3-1 and BL3-2.

Fixes ARM-software/tf-issues#38

Change-Id: I0244b80e9930b0f8035156a0bf91cc3e9a8f995d

Move per cpu exception stack in BL31 to tzfw_normal_stacks ...

Fixes ARM-software/tf-issues#70

Change-Id: I7f024f173fbdecd315076f528b05d6295aff7276

Add standby state support in PSCI cpu_suspend api ...

This patch adds support in the generic PSCI implementation to call a
platform specific function to enter a standby state using an example
implementation in ARM FVP port

Fixes ARM-software/tf-issues#94
Change-Id: Ic1263fcf25f28e09162ad29dca954125f9aa8cc9

Semihosting: Fix file mode to load binaries on Windows ...

Trusted firmware binaries loaded via semihosting used to be
opened using 'r' mode (i.e. read mode).  This is fine on POSIX
conforming systems (including Linux) but for Windows it also means
that the file should be opened in text mode. 'rb' mode must be
specified instead for binary mode.  On POSIX conforming systems,
'rb' mode is equivalent to 'r' mode so it does no harm.

Fixes ARM-software/tf-issues#69

Change-Id: Ifa53f2ecfd765f572dea5dd73191f9fe2b2c2011

Remove partially qualified asm helper functions ...

Each ARM Trusted Firmware image should know in which EL it is running
and it should use the corresponding register directly instead of reading
currentEL and knowing which asm register to read/write

Change-Id: Ief35630190b6f07c8fbb7ba6cb20db308f002945

Fix the disable_mmu code ...

Remove the hard coding of all the MMU related registers with 0 and disable MMU
by clearing the M and C bit in SCTLR_ELx

Change-Id: I4a0b1bb14a604734b74c32eb31315d8504a7b8d8

TSP: Make the platform-specific makefile mandatory ...

The Test Secure-EL1 Payload implementation should always have a
platform-specific component.  Therefore, there should always
be a platform-specific sub-makefile for the TSP.  If there is
none then assume TSP is not supported on this specific platform
and throw an error at build time if the user tries to compile it.

Change-Id: Ibfbe6e4861cc7786a29f2fc0341035b852925193

Fix file_to_uuid() function ...

This patch fixes a bug in the 'file_to_uuid()' function: it used
to cause an exception by dereferencing a null pointer when
a given UUID was not found in the UUID array. The fix is to delete
the final null entry in the UUID array, which is not needed because
the array is statically declared so its size is known at build time.

Fixes ARM-software/tf-issues#43

Change-Id: I0a003485b88134564c0d36f57c274215d9e16532

FIP tool: Fix error message for missing FIP filename ...

Previously to this path, the FIP tool used to print the following,
misleading error message when called without any argument or with
'--help' option:

  ERROR: Too many arguments

This patch fixes this behavior by printing the following error
message instead:

  ERROR: Missing FIP filename

If called with '--help', no error message is printed and only the
help message is displayed.

Change-Id: Ib281b056f5cd3bc2f66d98be0b0cb2a0aed7c6a8

FIP tool: Add support for '--help' option. ...

Also improve the help message printed by the FIP tool.

Change-Id: If0f802f1083458182ca8ce57e8c104d40eee0dbe

FIP tool: Small optimisation for option parsing ...

This patch makes use of different values for '--dump' and other
command-line options. This makes the code simpler and also
optimises it a bit (because it avoids a string comparison).

Change-Id: I1c8345f210074fc5f962ea0282fd3625775dec69

Rework bakery lock with WFE/SEV sequence ...

Current implementation of Bakery Lock does tight-loop waiting upon lock
contention.

This commit reworks the implementation to use WFE instruction for
waiting, and SEV to signal lock availability. It also adds the rationale
for choosing Bakery Locks instead of exclusion primitives, and more
comments for the lock algorithm.

Fixes ARM-software/tf-issue#67

Change-Id: Ie351d3dbb27ec8e64dbc9507c84af07bd385a7df
Co-authored-by: Vikram Kanigiri <vikram.kanigiri@arm.com>

Specify image entry in linker script ...

At present, the entry point for each BL image is specified via the
Makefiles and provided on the command line to the linker. When using a
link script the entry point should rather be specified via the ENTRY()
directive in the link script.

This patch updates linker scripts of all BL images to specify the entry
point using the ENTRY() directive. It also removes the --entry flag
passed to the linker through Makefile.

Fixes issue ARM-software/tf-issues#66

Change-Id: I1369493ebbacea31885b51185441f6b628cf8da0

Implement standard calls for TSP ...

This patch adds call count, UID and version information SMC calls for
the Trusted OS, as specified by the SMC calling convention.

Change-Id: I9a3e84ac1bb046051db975d853dcbe9612aba6a9

Implement ARM Standard Service ...

This patch implements ARM Standard Service as a runtime service and adds
support for call count, UID and revision information SMCs. The existing
PSCI implementation is subsumed by the Standard Service calls and all
PSCI calls are therefore dispatched by the Standard Service to the PSCI
handler.

At present, PSCI is the only specification under Standard Service. Thus
call count returns the number of PSCI calls implemented. As this is the
initial implementation, a revision number of 0.1 is returned for call
revision.

Fixes ARM-software/tf-issues#62

Change-Id: I6d4273f72ad6502636efa0f872e288b191a64bc1

Move architecture timer setup to platform-specific code ...

At present, bl1_arch_setup() and bl31_arch_setup() program the counter
frequency using a value from the memory mapped generic timer. The
generic timer however is not necessarily present on all ARM systems
(although it is architected to be present on all server systems).

This patch moves the timer setup to platform-specific code and updates
the relevant documentation. Also, CNTR.FCREQ is set as the specification
requires the bit corresponding to the counter's frequency to be set when
enabling. Since we intend to use the base frequency, set bit 8.

Fixes ARM-software/tf-issues#24

Change-Id: I32c52cf882253e01f49056f47c58c23e6f422652

Remove unused 'CPU present' flag ...

This patch removes the 'CPU present' flag that's being set but not
referred or used anywhere else.

Change-Id: Iaf82bdb354134e0b33af16c7ba88eb2259b2682a

Remove change log instructions from contribution.md ...

Remove the instructions to update the change log from
contribution.md. The change log no longer contains a
"Detailed changes since last release" section.

Also, update the documentation links following recent
documentation changes.

Change-Id: Id9df43d666f7f9a60dcc6f663a8a85cdd2ff7cc4

bl_common: add image_size() ...

Fixes ARM-software/tf-issues#42

Some callers of load_image() may need to get the size of the image
before/after loading it.

Change-Id: I8dc067b69fc711433651a560ba5a8c3519445857
Signed-off-by: Ryan Harkin <ryan.harkin@linaro.org>

fvp: plat_io_storage: remove duplicated code ...

Fixes ARM-software/tf-issues#41

The policy functions for each file to be loaded were implemented by
copy/pasting one method and then varying the data checked.

This patch creates a generic function to check the policy based on the
data stored in a table.

This removes the amount of duplicated code but also makes the code
simpler and more efficient.

Change-Id: I1c52eacf6f18a1442dabbb33edd03d4bb8bbeae0
Signed-off-by: Ryan Harkin <ryan.harkin@linaro.org>

Enable platforms to omit some bootloaders ...

If a platform doesn't specify a BLx_SOURCE variable, then building
of the corresponding bootloader isn't attempted. Also allow BL3-3 to
be omitted from the FIP.

Note, this change also removes support for PLAT=all and the 'fip' target
from the 'all' recipe.

Fixes ARM-software/tf-issues#30

Change-Id: Ibdfead0440256eaf364617ecff65290ca6fe6240
Signed-off-by: Jon Medhurst <tixy@linaro.org>

Generate build time and date message at link time. ...

So it updates each time a bootloader changes, not just when bl*_main.c
files are recompiled.

Fixes ARM-software/tf-issues#33

Change-Id: Ie8e1a7bd7e1913d2e96ac268606284f76af8c5ab
Signed-off-by: Jon Medhurst <tixy@linaro.org>

fvp: Make use of the generic MMU translation table setup code ...

Change-Id: I559c5a4d86cad55ce3f6ad71285b538d3cfd76dc
Signed-off-by: Jon Medhurst <tixy@linaro.org>