Merge pull request #1751 from vwadekar/tegra-scatter-file-support ...

Tegra scatter file support

Minor changes to documentation and comments ...

Fix some typos and clarify some sentences.

Change-Id: Id276d1ced9a991b4eddc5c47ad9a825e6b29ef74
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>

Tegra: Support for scatterfile for the BL31 image ...

This patch provides support for using the scatterfile format as
the linker script with the 'armlink' linker for Tegra platforms.

In order to enable the scatterfile usage the following changes
have been made:

* provide mapping for ld.S symbols in bl_common.h
* include bl_common.h from all the affected files
* update the makefile rules to use the scatterfile and armlink
  to compile BL31
* update pubsub.h to add sections to the scatterfile

NOTE: THIS CHANGE HAS BEEN VERIFIED WITH TEGRA PLATFORMS ONLY.

Change-Id: I7bb78b991c97d74a842e5635c74cb0b18e0fce67
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

Add support for pointer authentication ...

The previous commit added the infrastructure to load and save
ARMv8.3-PAuth registers during Non-secure <-> Secure world switches, but
didn't actually enable pointer authentication in the firmware.

This patch adds the functionality needed for platforms to provide
authentication keys for the firmware, and a new option (ENABLE_PAUTH) to
enable pointer authentication in the firmware itself. This option is
disabled by default, and it requires CTX_INCLUDE_PAUTH_REGS to be
enabled.

Change-Id: I35127ec271e1198d43209044de39fa712ef202a5
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>

Add ARMv8.3-PAuth registers to CPU context ...

ARMv8.3-PAuth adds functionality that supports address authentication of
the contents of a register before that register is used as the target of
an indirect branch, or as a load.

This feature is supported only in AArch64 state.

This feature is mandatory in ARMv8.3 implementations.

This feature adds several registers to EL1. A new option called
CTX_INCLUDE_PAUTH_REGS has been added to select if the TF needs to save
them during Non-secure <-> Secure world switches. This option must be
enabled if the hardware has the registers or the values will be leaked
during world switches.

To prevent leaks, this patch also disables pointer authentication in the
Secure world if CTX_INCLUDE_PAUTH_REGS is 0. Any attempt to use it will
be trapped in EL3.

Change-Id: I27beba9907b9a86c6df1d0c5bf6180c972830855
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>

plat/arm: Support for Cortex A5 in FVP Versatile Express platform ...

Cortex A5 doesnt support VFP, Large Page addressing and generic timer
which are addressed in this patch. The device tree for Cortex a5
is also included.

Change-Id: I0722345721b145dfcc80bebd36a1afbdc44bb678
Signed-off-by: Usama Arif <usama.arif@arm.com>

libc: Move setjmp to libc folder ...

Now that setjmp() and longjmp() are compliant with the standard they can
be moved with the other libc files.

Change-Id: Iea3b91c34eb353ace5e171e72f331602d57774d5
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>

Introduce build option to override libc ...

This patch introduces a build option 'OVERRIDE_LIBC' that platforms
can set to override libc from the BL image. The default value is '0'
to keep the library.

Change-Id: I10a0b247f6a782eeea4a0359e30a8d79b1e9e4e1
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

Remove support for the SMC Calling Convention 2.0 ...

This reverts commit 2f370465241c ("Add support for the SMC Calling
Convention 2.0").

SMCCC v2.0 is no longer required for SPM, and won't be needed in the
future. Removing it makes the SMC handling code less complicated.

The SPM implementation based on SPCI and SPRT was using it, but it has
been adapted to SMCCC v1.0.

Change-Id: I36795b91857b2b9c00437cfbfed04b3c1627f578
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>

Make device tree pre-processing similar to U-boot/Linux ...

Following changes are done to make DT pre-processing similar to that of
U-boot/Linux kernel.

1. Creating seperate CPPFLAGS for DT preprocessing so that compiler
options specific to it can be accommodated.
e.g: "-undef" compiler option avoids replacing "linux" string(used in
device trees) with "1" as "linux" is a pre-defined macro in gnu99
standard.

2. Replace CPP with PP for DT pre-processing, as CPP in U-boot/Linux is
exported as "${CROSS_COMPILE}gcc -E" while in TF-A it is exported as
"${CROSS_COMPILE}cpp".

Change-Id: If4c61a249d51614d9f53ae30b602036d50c02349
Signed-off-by: Manish Pandey <manish.pandey2@arm.com>

SPM: Rename SPM_DEPRECATED flag to SPM_MM ...

The SPM implementation based on MM is going to be kept for the
foreseeable future.

Change-Id: I11e96778a4f52a1aa803e7e048d9a7cb24a53954
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
Acked-by: Sumit Garg <sumit.garg@linaro.org>

build: Support BL-specific build flags ...

With this patch, each BL image can have its own compiler flags.

Change-Id: Ic9075a20bc6f6dc8a277587b9bee5e062306c090
Signed-off-by: Jeenu Viswambharan <jeenu.viswambharan@arm.com>

SPM: Deprecate the current implementation ...

The current SPM is a prototype that only supports one secure partition
in EL0. The objective of SPM is to have multiple partitions. The current
MM interface isn't adequate for this, so it is needed to modify heavily
the code to add proper support for it.

However, there are platforms which are already using this (like SGI) and
removing the code would break it.  For this reason, the current SPM code
has been duplicated in order to temporarily preserve compatibility. All
new improvements/changes to SPM will be done in the non-deprecated copy,
that may change without notice.

The new build option SPM_DEPRECATED has been introduced to select the SPM
implementation. It defaults to 1, that selects the deprecated SPM.

Change-Id: Ic9f80b53b450e97b4d3f47e4ef4a138ee8d87443
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>

romlib: Allow patching of romlib functions ...

This change allows patching of functions in the
romlib. This can be done by adding "patch" at the
end of the jump table entry for the function that
needs to be patched in the file jmptbl.i.
Functions patched in the jump table list will be
built as part of the BL image and the romlib
version will not be used

Change-Id: Iefb200cb86e2a4b61ad3ee6180d3ecc39bad537f
Signed-off-by: Sathees Balya <sathees.balya@arm.com>

Basic Makefile changes for PIE ...

Change-Id: I0b8ccba15024c55bb03927cdb50370913eb8010c
Signed-off-by: Soby Mathew <soby.mathew@arm.com>

Makefile: Fix verbose builds on Windows ...

Commit <ee1ba6d4ddf1> ("Makefile: Support totally quiet output with -s")
broke verbose (V=1) builds on Windows. This patch fixes it by adding
helpers to silence echo prints in a OS-dependent way.

Change-Id: I24669150457516e9fb34fa32fa103398efe8082d
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>

Makefile: Support totally quiet output with -s ...

"-s" is a command line option to the make tool, to suppress normal output,
something to the effect of prepending every line with '@' in the Makefile.
However with our V={0|1} support, we now print the shortened command line
output in any case (even with V=1, in addition to the long line!).
Normally -s helps to not miss non-fatal warnings, which tend to scroll out
of the window easily.

Introduce a new Makefile variable ECHO, to control the shortened output.
We only set it in the (current default) V=0 case, and replace every
occurence of "@echo" with that variable.
When the user specifies "-s", we set ECHO to some magic string which
changes the output line into a comment, so the output is suppressed.

Beside suppressing every output for "-s", we also avoid the redundant
short output when compiling with V=1.

This changes the output to:
==========
$ make -s PLAT=.... bl31

Built build/.../release/bl31.bin

==========
$ make PLAT=.... bl31
...
  CC      lib/libc/strncmp.c
  CC      lib/libc/strnlen.c
...
==========
$ make V=1 PLAT=.... bl31
...
gcc -DDEBUG=0 .... -o build/.../release/libc/strncmp.o
gcc -DDEBUG=0 .... -o build/.../release/libc/strnlen.o
...
==========

Signed-off-by: Andre Przywara <andre.przywara@arm.com>

Merge pull request #1595 from Yann-lms/dts_dep ...

MAKE_DTB: dependencies on device tree source files

Introduce RECLAIM_INIT_CODE build flag ...

This patch introduces a build flag "RECLAIM_INIT_CODE" to mark boot time
code which allows platforms to place this memory in an appropriate
section to be reclaimed later. This features is primarily targeted for
BL31. Appropriate documentation updates are also done.

Change-Id: If0ca062851614805d769c332c771083d46599194
Signed-off-by: Daniel Boulby <daniel.boulby@arm.com>

Set the IMAGE_BLx flag for the linker preprocessor ...

Change-Id: Ibc91f119c99413ded59a9db3db918d22f0517bc1
Signed-off-by: Daniel Boulby <daniel.boulby@arm.com>

gic: Remove deprecated driver and interfaces ...

Change-Id: I567a406edb090ae9d109382f6874846a79dd7473
Co-authored-by: Roberto Vargas <roberto.vargas@arm.com>
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>

tbbr: Use USE_TBBR_DEFS=1 by default ...

Change-Id: I2885b0d8cb9bb16da1fa96a30e46cccde434dc42
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>

Remove build option LOAD_IMAGE_V2 ...

The code of LOAD_IMAGE_V2=0 has been removed.

Change-Id: Iea03e5bebb90c66889bdb23f85c07d0c9717fffe
Co-authored-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>

MAKE_DTB: dependencies on device tree source files ...

Fixes the dependencies issue for DTB image build.

Use -MT $(DTBS) -MMD -MF $(DTSDEP) to generate the precompilation
dependencies on DTS file(s).
"-MT $(DTBS)" builds a dependency for the target DTS file.
"-MMD" includes header file dependencies but not on system header files.
"-MF $(DTSDEP)" generates a Makefile script to define the dependencies
 which is included afterward.

This change renames existing variable DEP into DTBDEP.

Signed-off-by: Yann Gautier <yann.gautier@st.com>
Signed-off-by: Etienne Carriere <etienne.carriere@st.com>

Allow manually setting the AArch32 instruction set ...

At the moment the AArch32 instruction set isn't specified in the command
line, which means that the compiler is free to choose the one it sees
fit. This decision may change between compiler versions, so it is better
to specify it manually.

The build option AARCH32_INSTRUCTION_SET has been introduced for this
reason. This option can be set to T32 or A32 to pass the correct flags
to the compiler.

The current behaviour is to default to T32 due to it's smaller size.

Change-Id: I02297eb1d9404b5868ff7c054fbff9b3cda7fdb6
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>

AArch64: Enable MPAM for lower ELs ...

Memory Partitioning And Monitoring is an Armv8.4 feature that enables
various memory system components and resources to define partitions.
Software running at various ELs can then assign themselves to the
desired partition to control their performance aspects.

With this patch, when ENABLE_MPAM_FOR_LOWER_ELS is set to 1, EL3 allows
lower ELs to access their own MPAM registers without trapping to EL3.
This patch however doesn't make use of partitioning in EL3; platform
initialisation code should configure and use partitions in EL3 if
required.

Change-Id: I5a55b6771ccaa0c1cffc05543d2116b60cbbcdcd
Co-authored-by: James Morse <james.morse@arm.com>
Signed-off-by: Jeenu Viswambharan <jeenu.viswambharan@arm.com>

Add support for romlib in the build system ...

Romlib is a new image that is stored in ROM and contains the code of
several libraries that can be shared between different images. All
the functions within in the library are accessed using a jump table
which allows to update the romlib image whithout changing the binary
compatibility. This jump table can be also stored in RAM and it can
allow to patch a romlib with potential bugs fixes..

Change-Id: If980ccdaca24b7aaca900e32acc68baf6f94ab35
Signed-off-by: Roberto Vargas <roberto.vargas@arm.com>

Add make macros to build library archives ...

This patch adds all the make macros needed to create a library archive
and to use it in the link stage.

Change-Id: I26597bfd6543649d0b68a9b1e06aec1ba353e6de
Signed-off-by: Roberto Vargas <roberto.vargas@arm.com>

make: support libraries in MAKE_BL macro ...

Add support for BLx stages to use libraries in MAKE_BL macro.
This change does not affect BL stages that do not have
BL_LIBS variable defined in their makefiles.
However in case that BL wants to use external library
(for instance vendor-specific DDR initialization code supplied
as a library), this patch will allow to build BL image linked
with such library.

Change-Id: Ife29069a72dc4aff833db6ef8b828736d6689b78
Signed-off-by: Konstantin Porotchkin <kostap@marvell.com>

Build: add cpp build processing for dtb ...

This is an add-on feature that allows processing
device tree with external includes.

"-Iinclude" is also added to INCLUDES.
It allows inclusion of dt-bindings files either in dts files or drivers,
as those files will be in include/dt-bindings/.

"-i fdts" is added to the DTC command line.
As the pre-processed files are in build directory, the DT source directory
has to be explicitely included, to manages /include/ directives.

fixes arm-software/tf-issues#595

Signed-off-by: Lionel Debieve <lionel.debieve@st.com>
Signed-off-by: Yann Gautier <yann.gautier@st.com>