Add IO abstraction framework

This is intended primarily for use as a storage abstraction.
It allows operations such as image-loading to be implemented
in a platform-independent fashion. Each platfo

Add IO abstraction framework

This is intended primarily for use as a storage abstraction.
It allows operations such as image-loading to be implemented
in a platform-independent fashion. Each platform registers
a set of IO drivers during initialisation. The platform must
also provide a function that will return a device and a specifier
that can be used to access specified content.

Clients of the API will primarily use device and entity handles.
The term "entity" is deliberately vague, to allow for different
representations of content accessed using different types of
specifier, but will often be interpreted as a "file" where the
specifier will normally be its path.

This commit builds, but is intended to be paired with a sample
implementation of "load_image" using a semi-hosting driver on FVP.

Change-Id: Id3b52f1c0eb9ce76b44b99fc6b6460803668cc86

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Fix asserts appearing in release builds

Also fix warnings generated in release builds when assert code
is absent.

Change-Id: I45b9173d3888f9e93e98eb5b4fdc06727ba5cbf4

Compile assembly files with -DDEBUG flag

Change-Id: Ic6cf19402a0936161baf6b91bf75d64d95269a3c

Allow style checking of tree and local changes

New phony Makefile targets have been added:

* checkcodebase
* checkpatch

The checkcodebase target will run a Linux style compliance check over the

Allow style checking of tree and local changes

New phony Makefile targets have been added:

* checkcodebase
* checkpatch

The checkcodebase target will run a Linux style compliance check over the
entire codebase, and honours the V=1 Makefile verbose setting and so will
show more information when this is enabled.

If the local directory is a git checkout then the output of git ls-files is
used to decide which files to test for compliance. If the local directory
is not under git control then a 'best attempt' is made, but in this case it
should be noted that it is possible for additional non-codebase files to be
tested, so care should be taken when parsing the output.

The checkpatch target will compare local changes against the git origin/master
to allow issues with the last set of changes to be identified. To override
the change comparision location, set the BASE_COMMIT variable to your
desired git branch.

Both targets rely on the Linux source tree script checkpatch.pl to do the
syntax checking, and expects that the CHECKPATCH environment variable points
to the location of this file.

Notes on the usage of these targets have been added to the contributing.md
and docs/user-guide.md text files.

Change-Id: I6d73c97af578e24a34226d972afadab9d30f1d8d

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Build system: Add cscope target to the Makefile

Fixes arm-software/tf-issues#15

Signed-off-by: Joakim Bech <joakim.bech@linaro.org>

Build system: add 'make help' option

Add the 'help' target to the Makefile to present a brief guide to the
various build options available.

Change-Id: Ic3a3489860b6362eb236470ea6b43a16a1b2fe3a
Sign

Build system: add 'make help' option

Add the 'help' target to the Makefile to present a brief guide to the
various build options available.

Change-Id: Ic3a3489860b6362eb236470ea6b43a16a1b2fe3a
Signed-off-by: Ryan Harkin <ryan.harkin@linaro.org>

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Build system: minor spacing tidyup

Tidy up the spacing of variable definitions within the makefiles to make
them more consistent, easier to read and amend.

Change-Id: Ic6d7c8489ca4330824abb5cd1ead8

Build system: minor spacing tidyup

Tidy up the spacing of variable definitions within the makefiles to make
them more consistent, easier to read and amend.

Change-Id: Ic6d7c8489ca4330824abb5cd1ead8f1d449d1a85
Signed-off-by: Ryan Harkin <ryan.harkin@linaro.org>

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Build system: Fixes #2: Add multi-platform support

Move all explicit platform or architecture specific references
into a new platform.mk file that is defined for each platform.

Change-Id: I9d6320d1

Build system: Fixes #2: Add multi-platform support

Move all explicit platform or architecture specific references
into a new platform.mk file that is defined for each platform.

Change-Id: I9d6320d1ba957e0cc8d9b316b3578132331fa428
Signed-off-by: Ryan Harkin <ryan.harkin@linaro.org>

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Do not trap access to floating point registers

Traps when accessing architectural features are disabled by clearing bits
in CPTR_EL3 during early boot, including accesses to floating point
registers

Do not trap access to floating point registers

Traps when accessing architectural features are disabled by clearing bits
in CPTR_EL3 during early boot, including accesses to floating point
registers. The value of this register was previously undetermined, causing
unwanted traps to EL3. Future EL3 code (for example, context save/restore
code) may use floating point registers, although they are not used by current
code.

Also, the '-mgeneral-regs-only' flag is enabled in the GCC settings to
prevent generation of code that uses floating point registers.

Change-Id: I9a03675f6387bbbee81a6f2c9ccf81150db03747

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Update year in copyright text to 2014

Change-Id: Ic7fb61aabae1d515b9e6baf3dd003807ff42da60

Build project with 'pedantic'

Tighten up ISO C standard checking. Fix 'CASSERT' implementation to
conform to C99 as opposed to GNU99 standard.

Change-Id: I58ddc61913617b66f11da5b6e3f7363136d5cf7d

Do not let GCC use built-in functions

In order to reduce the software dependency on the compiler, the project
is now compiled with the '-ffreestanding' flag. This is to prevent GCC
from replacing fu

Do not let GCC use built-in functions

In order to reduce the software dependency on the compiler, the project
is now compiled with the '-ffreestanding' flag. This is to prevent GCC
from replacing functions with more optimised versions. An example is
where GCC replaces a simple printf() with a puts().

Change-Id: I1973fe6957cd708e8432a0039af9d50e037bd884

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Create local C library implementation (1/2)

- This change is split into two separate patches in order to
simplify the history as interpreted by 'git'. The split is
between the move/rename and ad

Create local C library implementation (1/2)

- This change is split into two separate patches in order to
simplify the history as interpreted by 'git'. The split is
between the move/rename and addition of new files.
- Remove dependency on toolchain C library headers and functions in
order to ensure behavioural compatibility between toolchains.
- Use FreeBSD as reference for C library implementation.
- Do not let GCC use default library include paths.
- Remove unused definitions in modified headers and implementations.
- Move C library files to 'lib/stdlib' and 'include/stdlib'.
- Break std.c functions out into separate files.

Change-Id: I91cddfb3229775f770ad781589670c57d347a154

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Enable third party contributions

- Add instructions for contributing to ARM Trusted Firmware.

- Update copyright text in all files to acknowledge contributors.

Change-Id: I9311aac81b00c6c167d2f8c8

Enable third party contributions

- Add instructions for contributing to ARM Trusted Firmware.

- Update copyright text in all files to acknowledge contributors.

Change-Id: I9311aac81b00c6c167d2f8c889aea403b84450e5

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Treat compiler, assembler and linker warnings as errors

Change-Id: I56284ebf63bef99de1beb4fd86e2d8b6a7962ac0

Generate build products in sub-directories

A single binary can be compiled using a command such as:
make CROSS_COMPILE=aarch64-none-elf- bl1

Also make use of brackets consistent in the Makefile.

Generate build products in sub-directories

A single binary can be compiled using a command such as:
make CROSS_COMPILE=aarch64-none-elf- bl1

Also make use of brackets consistent in the Makefile.

Change-Id: I2180fdb473411ef7cffe39670a7b2de82def812e

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ARMv8 Trusted Firmware release v0.2