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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

Fixes ARM-software/tf-issues#70

Change-Id: I7f024f173fbdecd315076f528b05d6295aff7276

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

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

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

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

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

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

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

Also improve the help message printed by the FIP tool.

Change-Id: If0f802f1083458182ca8ce57e8c104d40eee0dbe

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

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>

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

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

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

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

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

Change-Id: Iaf82bdb354134e0b33af16c7ba88eb2259b2682a

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

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>

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>

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>

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>

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

Change-Id: I5b8d040ebc6672e40e4f13925e2fd5bc124103f4
Signed-off-by: Jon Medhurst <tixy@linaro.org>

This change requires all platforms to now specify a list of source files
rather than object files.

New source files should preferably be specified by using the path as
well and we should add this in the future for all files so we can remove
use of vpath. This is desirable because vpath hides issues like the fact
that BL2 currently pulls in a BL1 file bl1/aarch64/early_exceptions.S
and if in the future we added bl2/aarch64/early_exceptions.S then it's
likely only one of the two version would be used for both bootloaders.

This change also removes the 'dump' build target and simply gets
bootloaders to always generate a dump file. At the same time the -x
option is added so the section headers and symbols table are listed.

Fixes ARM-software/tf-issues#11

Change-Id: Ie38f7be76fed95756c8576cf3f3ea3b7015a18dc
Signed-off-by: Jon Medhurst <tixy@linaro.org>

Make gicd_set_ipriorityr() actually write to the priority register.

Also correct callers of this function which want the highest priority
to use the value zero as this is the highest priority value according
to the ARM Generic Interrupt Controller Architecture Specification.

To make this easier to get right, we introduce defines for the lowest
and highest priorities for secure and non-secure interrupts.

Fixes ARM-software/tf-issues#21
Signed-off-by: Jon Medhurst <tixy@linaro.org>

bakery_lock_release() expects an mpidr as the first argument however
bakery_lock_release() is calling it with the 'entry' argument it has
calculated. Rather than fixing this to pass the mpidr value it would be
much more efficient to just replace the call with

   assert(bakery->owner == entry)

As this leaves no remaining users of bakery_lock_held(), we might as
well delete it.

Fixes ARM-software/tf-issues#27
Signed-off-by: Jon Medhurst <tixy@linaro.org>

Update the readme.md and change-log.md with release information.

Also, remove the "Detailed changes since last release" section of
the change-log.md since the same information can be found in the
GIT commit messages. Fixes ARM-software/tf-issues#22.

Change-Id: I968cc8aaf588aa5c34ba8f1c12a5b797a46e04f5

Consolidate firmware-design.md and porting-guide.pm so
that recently added sections fit better with
pre-existing sections. Make the documentation more
consistent in use of terminology.

Change-Id: Id87050b096122fbd845189dc2fe1cd17c3003468

1. Add design information on EL3 runtime services and
Secure-EL1 Payload Dispatchers (SPD) to
firmware-design.md.

2. Create new EL3 runtime service writer's guide
(rt-svc-writers-guide.md) to ease creation of new
runtime services.

Change-Id: I670aeb5fc246e25c6e599a15139aac886a0074fd

Move the firmware design documentation out of user-guide.md
and into a new file - firmware-design.md. Reformat the
section headers.

Change-Id: I664815dd47011c7c1cf2202aa4472a8fd78ebb92

1. Update user-guide.md with the latest versions of dependent
components required by the tested configurations of ARM Trusted
Firmware. This includes the tested versions of Fixed Virtual
Platforms (FVPs), toolchain, EFI Development Kit 2(EDK2),
Linux kernel and Linux file system.

2. Remove the instructions to configure the Cortex Base FVP
with the legacy GICv2 memory map as this is no longer supported
since version 5.3 of the Base FVPs.

3. General tidyup of "Using the software" section.

Change-Id: If8264cd29036b59dc5ff435b5f8b1d072dd36ef0

The BL31 and BL2 linker scripts ended up having duplicate descriptions
for xlat_tables section. This patch removes those duplicate
descriptions.

Change-Id: Ibbdda0902c57fca5ea4e91e0baefa6df8f0a9bb1

The UART used to be initialised in bl1_platform_setup(). This is too
late because there are some calls to the assert() macro, which needs
to print some messages on the console, before that.

This patch moves the UART initialisation code to
bl1_early_platform_setup().

Fixes ARM-software/tf-issues#49

Change-Id: I98c83a803866372806d2a9c2e1ed80f2ef5b3bcc

At present, the firmware panics if a runtime service fails to
initialize. An earlier patch had implemented late binding for all
runtime service handlers.

With that in place, this patch allows the firmware to proceed even when
a service fails to initialize.

Change-Id: I6cf4de2cecea9719f4cd48272a77cf459b080d4e

At present SPD power management hooks and BL3-2 entry are implemented
using weak references. This would have the handlers bound and registered
with the core framework at build time, but leaves them dangling if a
service fails to initialize at runtime.

This patch replaces implementation by requiring runtime handlers to
register power management and deferred initialization hooks with the
core framework at runtime. The runtime services are to register the
hooks only as the last step, after having all states successfully
initialized.

Change-Id: Ibe788a2a381ef39aec1d4af5ba02376e67269782

This commit updates contributing.md to point to the ARM website
for downloading copies of the Contribution License Agreement (CLA).
It is no longer necessary to email ARM for these.

Change-Id: Iaf58680631a626f26827577709ac5471e3b84566

Change-Id: Ia8502f8d0566025d8bad150029f49cb63815261d

Commit 375f538a in Github accidentally removed the BL2 targets from the
Makefile help message. This patch reverts that change.

Change-Id: I825a9abe5b4ba0f15d02879dda1056912e2ad60c

This patch updates .gitignore file to ignore potential build products,
tool object files and binaries

Also fixes issue ARM-software/tf-issues#35

Change-Id: I053dfba4ec8fecbcca081cad5b4bf94f8abfb15c