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Jimmy Brisson 0d422fc9b6 Increase type widths to satisfy width requirements 
Usually, C has no problem up-converting types to larger bit sizes. MISRA
rule 10.7 requires that you not do this, or be very explicit about this.
This resolves the following required rule:

    bl1/aarch64/bl1_context_mgmt.c:81:[MISRA C-2012 Rule 10.7 (required)]<None>
    The width of the composite expression "0U | ((mode & 3U) << 2U) | 1U |
    0x3c0U" (32 bits) is less that the right hand operand
    "18446744073709547519ULL" (64 bits).

This also resolves MISRA defects such as:

    bl2/aarch64/bl2arch_setup.c:18:[MISRA C-2012 Rule 12.2 (required)]
    In the expression "3U << 20", shifting more than 7 bits, the number
    of bits in the essential type of the left expression, "3U", is
    not allowed.

Further, MISRA requires that all shifts don't overflow. The definition of
PAGE_SIZE was (1U << 12), and 1U is 8 bits. This caused about 50 issues.
This fixes the violation by changing the definition to 1UL << 12. Since
this uses 32bits, it should not create any issues for aarch32.

This patch also contains a fix for a build failure in the sun50i_a64
platform. Specifically, these misra fixes removed a single and
instruction,

    92407e73        and     x19, x19, #0xffffffff

from the cm_setup_context function caused a relocation in
psci_cpus_on_start to require a linker-generated stub. This increased the
size of the .text section and caused an alignment later on to go over a
page boundary and round up to the end of RAM before placing the .data
section. This sectionn is of non-zero size and therefore causes a link
error.

The fix included in this reorders the functions during link time
without changing their ording with respect to alignment.

Change-Id: I76b4b662c3d262296728a8b9aab7a33b02087f16
Signed-off-by: Jimmy Brisson <jimmy.brisson@arm.com>
 		2020-10-12 10:51:21 -05:00
bl1 Increase type widths to satisfy width requirements 2020-10-12 10:51:21 -05:00
bl2 TF-A: Add support for Measured Boot driver in BL1 and BL2 2020-07-21 20:33:20 +00:00
bl2u linker_script: move .data section to bl_common.ld.h 2020-04-25 20:09:08 +09:00
bl31 Increase type widths to satisfy width requirements 2020-10-12 10:51:21 -05:00
bl32 Increase type widths to satisfy width requirements 2020-10-12 10:51:21 -05:00
common Increase type widths to satisfy width requirements 2020-10-12 10:51:21 -05:00
docs Workaround for Cortex A77 erratum 1925769 2020-10-07 21:15:38 +00:00
drivers Increase type widths to satisfy width requirements 2020-10-12 10:51:21 -05:00
fdts fdts: enable virtio-rng component for morello fvp platform 2020-10-08 18:39:55 +05:30
include Increase type widths to satisfy width requirements 2020-10-12 10:51:21 -05:00
lib Increase type widths to satisfy width requirements 2020-10-12 10:51:21 -05:00
make_helpers Merge "build_macros.mk: include assert and define loop macros" into integration 2020-09-21 08:28:50 +00:00
plat Increase type widths to satisfy width requirements 2020-10-12 10:51:21 -05:00
services spmd: Fix signedness comparison warning 2020-10-02 12:14:02 +00:00
tools Update makefile to build fiptool for Windows 2020-09-14 15:06:56 +01:00
.checkpatch.conf Re-apply GIT_COMMIT_ID check for checkpatch 2019-07-12 11:06:24 +01:00
.editorconfig doc: Final, pre-release fixes and updates 2019-10-22 13:15:02 +00:00
.gitignore Ignore the ctags file 2020-01-22 16:08:27 +00:00
.gitreview Specify integration as the default branch for git-review 2020-04-02 07:57:17 +00:00
Makefile Merge "build_macros.mk: include assert and define loop macros" into integration 2020-09-21 08:28:50 +00:00
dco.txt Drop requirement for CLA in contribution.md 2016-09-27 21:52:03 +01:00
license.rst doc: De-duplicate readme and license files 2019-10-08 16:36:15 +00:00
readme.rst doc: Formatting fixes for readme.rst 2019-10-09 15:37:59 +00:00

readme.rst 

Trusted Firmware-A
==================

Trusted Firmware-A (TF-A) is a reference implementation of secure world software
for `Arm A-Profile architectures`_ (Armv8-A and Armv7-A), including an Exception
Level 3 (EL3) `Secure Monitor`_. It provides a suitable starting point for
productization of secure world boot and runtime firmware, in either the AArch32
or AArch64 execution states.

TF-A implements Arm interface standards, including:

-  `Power State Coordination Interface (PSCI)`_
-  `Trusted Board Boot Requirements CLIENT (TBBR-CLIENT)`_
-  `SMC Calling Convention`_
-  `System Control and Management Interface (SCMI)`_
-  `Software Delegated Exception Interface (SDEI)`_

The code is designed to be portable and reusable across hardware platforms and
software models that are based on the Armv8-A and Armv7-A architectures.

In collaboration with interested parties, we will continue to enhance TF-A
with reference implementations of Arm standards to benefit developers working
with Armv7-A and Armv8-A TrustZone technology.

Users are encouraged to do their own security validation, including penetration
testing, on any secure world code derived from TF-A.

More Info and Documentation
---------------------------

To find out more about Trusted Firmware-A, please `view the full documentation`_
that is available through `trustedfirmware.org`_.

--------------

*Copyright (c) 2013-2019, Arm Limited and Contributors. All rights reserved.*

.. _Armv7-A and Armv8-A: https://developer.arm.com/products/architecture/a-profile
.. _Secure Monitor: http://www.arm.com/products/processors/technologies/trustzone/tee-smc.php
.. _Power State Coordination Interface (PSCI): PSCI_
.. _PSCI: http://infocenter.arm.com/help/topic/com.arm.doc.den0022d/Power_State_Coordination_Interface_PDD_v1_1_DEN0022D.pdf
.. _Trusted Board Boot Requirements CLIENT (TBBR-CLIENT): https://developer.arm.com/docs/den0006/latest/trusted-board-boot-requirements-client-tbbr-client-armv8-a
.. _SMC Calling Convention: http://infocenter.arm.com/help/topic/com.arm.doc.den0028b/ARM_DEN0028B_SMC_Calling_Convention.pdf
.. _System Control and Management Interface (SCMI): SCMI_
.. _SCMI: http://infocenter.arm.com/help/topic/com.arm.doc.den0056a/DEN0056A_System_Control_and_Management_Interface.pdf
.. _Software Delegated Exception Interface (SDEI): SDEI_
.. _SDEI: http://infocenter.arm.com/help/topic/com.arm.doc.den0054a/ARM_DEN0054A_Software_Delegated_Exception_Interface.pdf
.. _Arm A-Profile architectures: https://developer.arm.com/architectures/cpu-architecture/a-profile
.. _view the full documentation: https://www.trustedfirmware.org/docs/tf-a
.. _trustedfirmware.org: http://www.trustedfirmware.org