AArch32: Add tf_printf support

The tf_printf library uses 64 bit division to print numbers
in appropriate formats but AArch32 mode cannot do 64 bit division
natively. Hence this patch adds additiona

AArch32: Add tf_printf support

The tf_printf library uses 64 bit division to print numbers
in appropriate formats but AArch32 mode cannot do 64 bit division
natively. Hence this patch adds additional number printing routines
to handle AArch32 mode in tf_printf library. The decimal format
printing capability is limited to 32 bit integers whereas 64 bits
are supported in hexadecimal format. The library assumes that
secure world is running in Little-Endian mode to do bit
manipulations on 64 bit. Suitable assertions are present to
enforce this assumption.

Change-Id: I55a21e448cef4915d1834d76e48a84ccf0bec36d

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AArch32: Add assembly helpers

This patch adds various assembly helpers for AArch32 like :

* cache management : Functions to flush, invalidate and clean
cache by MVA. Also helpers to do cache operat

AArch32: Add assembly helpers

This patch adds various assembly helpers for AArch32 like :

* cache management : Functions to flush, invalidate and clean
cache by MVA. Also helpers to do cache operations by set-way
are also added.

* stack management: Macros to declare stack and get the current
stack corresponding to current CPU.

* Misc: Macros to access co processor registers in AArch32,
macros to define functions in assembly, assert macros, generic
`do_panic()` implementation and function to zero block of memory.

Change-Id: I7b78ca3f922c0eda39beb9786b7150e9193425be

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Merge pull request #673 from soby-mathew/sm/coverity_issue

Improve debug assertion for runtime svc number

Improve debug assertion for runtime svc number

This patch improves the debug assertion for runtime svc number
- Remove useless comparison ensuring that the number of descriptors
is a positive nu

Improve debug assertion for runtime svc number

This patch improves the debug assertion for runtime svc number
- Remove useless comparison ensuring that the number of descriptors
is a positive number. The variable is an unsigned integer so can't
be negative.
- Check that the end address of the descriptors is sane relative
to the start address.

Change-Id: Iea7be6b34e33b8b1cbd394eb923cc834ea964831

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Ensure addresses in is_mem_free() don't overflow

This patch adds some runtime checks to prevent some potential
pointer overflow issues in the is_mem_free() function. The overflow
could happen in the

Ensure addresses in is_mem_free() don't overflow

This patch adds some runtime checks to prevent some potential
pointer overflow issues in the is_mem_free() function. The overflow
could happen in the case where the end addresses, computed as the
sum of a base address and a size, results in a value large enough
to wrap around. This, in turn, could lead to unpredictable behaviour.

If such an overflow is detected, the is_mem_free() function will now
declare the memory region as not free. The overflow is detected using
a new macro, called check_uptr_overflow().

This patch also modifies all other places in the 'bl_common.c' file
where an end address was computed as the sum of a base address and a
size and instead keeps the two values separate. This avoids the need
to handle pointer overflows everywhere. The code doesn't actually need
to compute any end address before the is_mem_free() function is called
other than to print information message to the serial output.

This patch also introduces 2 slight changes to the reserve_mem()
function:

- It fixes the end addresses passed to choose_mem_pos(). It was
incorrectly passing (base + size) instead of (base + size - 1).

- When the requested allocation size is 0, the function now exits
straight away and says so using a warning message.
Previously, it used to actually reserve some memory. A zero-byte
allocation was not considered as a special case so the function
was using the same top/bottom allocation mechanism as for any
other allocation. As a result, the smallest area of memory starting
from the requested base address within the free region was
reserved.

Change-Id: I0e695f961e24e56ffe000718014e0496dc6e1ec6

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Make runtime_svc_init() function more robust

- Added some debug assertions checking that the runtime services
indexes computed by get_unique_oen() are sane.

- Do not print the name of the serv

Make runtime_svc_init() function more robust

- Added some debug assertions checking that the runtime services
indexes computed by get_unique_oen() are sane.

- Do not print the name of the service when its descriptor is
invalid. If the descriptor is corrupted then its name field
could be corrupted as well and we would end up reading an
arbitrary amount of invalid memory.

Change-Id: I16f61065277d01fe1555d5a9cf743f7b52ccaa60

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Improvements to runtime service init code

Light refactoring of the code in runtime_svc.c file.

- Declare validate_rt_svc_desc()'s argument as const.

- Remove 'goto' path in runtime_svc_init(). I

Improvements to runtime service init code

Light refactoring of the code in runtime_svc.c file.

- Declare validate_rt_svc_desc()'s argument as const.

- Remove 'goto' path in runtime_svc_init(). It was used in one
place only.

- Improve code readability by declaring a local variable holding the
service pointer.

Change-Id: I3b15c5adb9f37b786b5b993a9be70ea9dd017a83

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Introduce `el3_runtime` and `PSCI` libraries

This patch moves the PSCI services and BL31 frameworks like context
management and per-cpu data into new library components `PSCI` and
`el3_runtime` resp

Introduce `el3_runtime` and `PSCI` libraries

This patch moves the PSCI services and BL31 frameworks like context
management and per-cpu data into new library components `PSCI` and
`el3_runtime` respectively. This enables PSCI to be built independently from
BL31. A new `psci_lib.mk` makefile is introduced which adds the relevant
PSCI library sources and gets included by `bl31.mk`. Other changes which
are done as part of this patch are:

* The runtime services framework is now moved to the `common/` folder to
enable reuse.
* The `asm_macros.S` and `assert_macros.S` helpers are moved to architecture
specific folder.
* The `plat_psci_common.c` is moved from the `plat/common/aarch64/` folder
to `plat/common` folder. The original file location now has a stub which
just includes the file from new location to maintain platform compatibility.

Most of the changes wouldn't affect platform builds as they just involve
changes to the generic bl1.mk and bl31.mk makefiles.

NOTE: THE `plat_psci_common.c` FILE HAS MOVED LOCATION AND THE STUB FILE AT
THE ORIGINAL LOCATION IS NOW DEPRECATED. PLATFORMS SHOULD MODIFY THEIR
MAKEFILES TO INCLUDE THE FILE FROM THE NEW LOCATION.

Change-Id: I6bd87d5b59424995c6a65ef8076d4fda91ad5e86

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Rework type usage in Trusted Firmware

This patch reworks type usage in generic code, drivers and ARM platform files
to make it more portable. The major changes done with respect to
type usage are as

Rework type usage in Trusted Firmware

This patch reworks type usage in generic code, drivers and ARM platform files
to make it more portable. The major changes done with respect to
type usage are as listed below:

* Use uintptr_t for storing address instead of uint64_t or unsigned long.
* Review usage of unsigned long as it can no longer be assumed to be 64 bit.
* Use u_register_t for register values whose width varies depending on
whether AArch64 or AArch32.
* Use generic C types where-ever possible.

In addition to the above changes, this patch also modifies format specifiers
in print invocations so that they are AArch64/AArch32 agnostic. Only files
related to upcoming feature development have been reworked.

Change-Id: I9f8c78347c5a52ba7027ff389791f1dad63ee5f8

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Merge pull request #650 from Xilinx/zynqmp-updates

Zynqmp updates

Update comments in load_image()

- Fix the function documentation.
Since commit 16948ae1, load_image() uses image IDs rather than image
names.

- Clarify the consequences of a null entry point ar

Update comments in load_image()

- Fix the function documentation.
Since commit 16948ae1, load_image() uses image IDs rather than image
names.

- Clarify the consequences of a null entry point argument.

- Slightly reorganize the code to remove an unnecessary 'if' statement.

Change-Id: Iebea3149a37f23d3b847a37a206ed23f7e8ec717

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Merge pull request #636 from soby-mathew/sm/cpu_ctx_rem_aarch32_regs

Build option to include AArch32 registers in cpu context

Build option to include AArch32 registers in cpu context

The system registers that are saved and restored in CPU context include
AArch32 systems registers like SPSR_ABT, SPSR_UND, SPSR_IRQ, SPSR_FIQ

Build option to include AArch32 registers in cpu context

The system registers that are saved and restored in CPU context include
AArch32 systems registers like SPSR_ABT, SPSR_UND, SPSR_IRQ, SPSR_FIQ,
DACR32_EL2, IFSR32_EL2 and FPEXC32_EL2. Accessing these registers on an
AArch64-only (i.e. on hardware that does not implement AArch32, or at
least not at EL1 and higher ELs) platform leads to an exception. This patch
introduces the build option `CTX_INCLUDE_AARCH32_REGS` to specify whether to
include these AArch32 systems registers in the cpu context or not. By default
this build option is set to 1 to ensure compatibility. AArch64-only platforms
must set it to 0. A runtime check is added in BL1 and BL31 cold boot path to
verify this.

Fixes ARM-software/tf-issues#386

Change-Id: I720cdbd7ed7f7d8516635a2ec80d025f478b95ee

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Introduce some helper macros for exception vectors

This patch introduces some assembler macros to simplify the
declaration of the exception vectors. It abstracts the section
the exception code is pu

Introduce some helper macros for exception vectors

This patch introduces some assembler macros to simplify the
declaration of the exception vectors. It abstracts the section
the exception code is put into as well as the alignments
constraints mandated by the ARMv8 architecture. For all TF images,
the exception code has been updated to make use of these macros.

This patch also updates some invalid comments in the exception
vector code.

Change-Id: I35737b8f1c8c24b6da89b0a954c8152a4096fa95

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context: Fix typo in comment

Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>

Refactor the xlat_tables library code

The AArch32 long descriptor format and the AArch64 descriptor format
correspond to each other which allows possible sharing of xlat_tables
library code between

Refactor the xlat_tables library code

The AArch32 long descriptor format and the AArch64 descriptor format
correspond to each other which allows possible sharing of xlat_tables
library code between AArch64 and AArch32. This patch refactors the
xlat_tables library code to seperate the common functionality from
architecture specific code. Prior to this patch, all of the xlat_tables
library code were in `lib/aarch64/xlat_tables.c` file. The refactored code
is now in `lib/xlat_tables/` directory. The AArch64 specific programming
for xlat_tables is in `lib/xlat_tables/aarch64/xlat_tables.c` and the rest
of the code common to AArch64 and AArch32 is in
`lib/xlat_tables/xlat_tables_common.c`. Also the data types used in
xlat_tables library APIs are reworked to make it compatible between AArch64
and AArch32.

The `lib/aarch64/xlat_tables.c` file now includes the new xlat_tables
library files to retain compatibility for existing platform ports.
The macros related to xlat_tables library are also moved from
`include/lib/aarch64/arch.h` to the header `include/lib/xlat_tables.h`.

NOTE: THE `lib/aarch64/xlat_tables.c` FILE IS DEPRECATED AND PLATFORM PORTS
ARE EXPECTED TO INCLUDE THE NEW XLAT_TABLES LIBRARY FILES IN THEIR MAKEFILES.

Change-Id: I3d17217d24aaf3a05a4685d642a31d4d56255a0f

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Differentiate `long` and `long long` formats in tf_printf

This patch adds support to differentiate between `long` and `long long`
format specifiers in tf_printf(). In AArch64, they are the same whic

Differentiate `long` and `long long` formats in tf_printf

This patch adds support to differentiate between `long` and `long long`
format specifiers in tf_printf(). In AArch64, they are the same which is
a 64-bit word. But, in AArch32 they are different and tf_printf() needs
to handle these format specifiers separately. This patch also fixes the
type of variables used to generic C types.

Change-Id: If3bbb0245cd0183acbe13bc1fe0d9743f417578f

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Merge pull request #563 from sbranden/tf_issue_380

Add support for %z in tf_print()

Enable asynchronous abort exceptions during boot

Asynchronous abort exceptions generated by the platform during cold boot are
not taken in EL3 unless SCR_EL3.EA is set.

Therefore EA bit is set alon

Enable asynchronous abort exceptions during boot

Asynchronous abort exceptions generated by the platform during cold boot are
not taken in EL3 unless SCR_EL3.EA is set.

Therefore EA bit is set along with RES1 bits in early BL1 and BL31 architecture
initialisation. Further write accesses to SCR_EL3 preserve these bits during
cold boot.

A build flag controls SCR_EL3.EA value to keep asynchronous abort exceptions
being trapped by EL3 after cold boot or not.

For further reference SError Interrupts are also known as asynchronous external
aborts.

On Cortex-A53 revisions below r0p2, asynchronous abort exceptions are taken in
EL3 whatever the SCR_EL3.EA value is.

Fixes arm-software/tf-issues#368

Signed-off-by: Gerald Lejeune <gerald.lejeune@st.com>

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Add support for %z in tf_print()

Add support for %z format specific in tf_printf() to support
printing data of type size_t

Fixes ARM-software/tf-issues#380

Signed-off-by Scott Branden <scott.brand

Add support for %z in tf_print()

Add support for %z format specific in tf_printf() to support
printing data of type size_t

Fixes ARM-software/tf-issues#380

Signed-off-by Scott Branden <scott.branden@broadcom.com>

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Remove all non-configurable dead loops

Added a new platform porting function plat_panic_handler, to allow
platforms to handle unexpected error situations. It must be
implemented in assembly as it ma

Remove all non-configurable dead loops

Added a new platform porting function plat_panic_handler, to allow
platforms to handle unexpected error situations. It must be
implemented in assembly as it may be called before the C environment
is initialized. A default implementation is provided, which simply
spins.

Corrected all dead loops in generic code to call this function
instead. This includes the dead loop that occurs at the end of the
call to panic().

All unnecesary wfis from bl32/tsp/aarch64/tsp_exceptions.S have
been removed.

Change-Id: I67cb85f6112fa8e77bd62f5718efcef4173d8134

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Add support for %p in tf_printf()

This patch adds support for the `%p` format specifier in tf_printf()
following the example of the printf implementation of the stdlib used
in the trusted firmware.

Add support for %p in tf_printf()

This patch adds support for the `%p` format specifier in tf_printf()
following the example of the printf implementation of the stdlib used
in the trusted firmware.

Fixes ARM-software/tf-issues#292

Change-Id: I0b3230c783f735d3e039be25a9405f00023420da

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Miscellaneous doc fixes for v1.2

Change-Id: I6f49bd779f2a4d577c6443dd160290656cdbc59b

Remove dashes from image names: 'BL3-x' --> 'BL3x'

This patch removes the dash character from the image name, to
follow the image terminology in the Trusted Firmware Wiki page:

https://github.c

Remove dashes from image names: 'BL3-x' --> 'BL3x'

This patch removes the dash character from the image name, to
follow the image terminology in the Trusted Firmware Wiki page:

https://github.com/ARM-software/arm-trusted-firmware/wiki

Changes apply to output messages, comments and documentation.

non-ARM platform files have been left unmodified.

Change-Id: Ic2a99be4ed929d52afbeb27ac765ceffce46ed76

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Move context management code to common location

The upcoming Firmware Update feature needs transitioning across
Secure/Normal worlds to complete the FWU process and hence requires
context management

Move context management code to common location

The upcoming Firmware Update feature needs transitioning across
Secure/Normal worlds to complete the FWU process and hence requires
context management code to perform this task.

Currently context management code is part of BL31 stage only.
This patch moves the code from (include)/bl31 to (include)/common.
Some function declarations/definitions and macros have also moved
to different files to help code sharing.

Change-Id: I3858b08aecdb76d390765ab2b099f457873f7b0c

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