Implement an assert() callable from assembly code

The patch implements a macro ASM_ASSERT() which can
be invoked from assembly code. When assertion happens,
file name and line number of the check is

Implement an assert() callable from assembly code

The patch implements a macro ASM_ASSERT() which can
be invoked from assembly code. When assertion happens,
file name and line number of the check is written
to the crash console.

Fixes ARM-software/tf-issues#95

Change-Id: I6f905a068e1c0fa4f746d723f18df60daaa00a86

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Merge pull request #130 from athoelke/at/inline-asm-sysreg-v2

Make system register functions inline assembly v2

Make system register functions inline assembly

Replace the current out-of-line assembler implementations of
the system register and system instruction operations with
inline assembler.

This enables

Make system register functions inline assembly

Replace the current out-of-line assembler implementations of
the system register and system instruction operations with
inline assembler.

This enables better compiler optimisation and code generation
when accessing system registers.

Fixes ARM-software/tf-issues#91

Change-Id: I149af3a94e1e5e5140a3e44b9abfc37ba2324476

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Merge pull request #61 from athoelke/use-mrs-msr-from-assembler-v2

Use MRS/MSR instructions in assembler code v2

Merge pull request #60 from athoelke/disable-mmu-v2

Replace disable_mmu with assembler version v2

Merge pull request #59 from athoelke/review-barriers-v2

Correct usage of data and instruction barriers v2

Remove unused or invalid asm helper functions

There are a small number of non-EL specific helper functions
which are no longer used, and also some unusable helper
functions for non-existant register

Remove unused or invalid asm helper functions

There are a small number of non-EL specific helper functions
which are no longer used, and also some unusable helper
functions for non-existant registers.

This change removes all of these functions.

Change-Id: Idd656cef3b59cf5c46fe2be4029d72288b649c24

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Replace disable_mmu with assembler version

disable_mmu() cannot work as a C function as there is no control
over data accesses generated by the compiler between disabling and
cleaning the data cache

Replace disable_mmu with assembler version

disable_mmu() cannot work as a C function as there is no control
over data accesses generated by the compiler between disabling and
cleaning the data cache. This results in reading stale data from
main memory.

As assembler version is provided for EL3, and a variant that also
disables the instruction cache which is now used by the BL1
exception handling function.

Fixes ARM-software/tf-issues#147

Change-Id: I0cf394d2579a125a23c2f2989c2e92ace6ddb1a6

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Correct usage of data and instruction barriers

The current code does not always use data and instruction
barriers as required by the architecture and frequently uses
barriers excessively due to thei

Correct usage of data and instruction barriers

The current code does not always use data and instruction
barriers as required by the architecture and frequently uses
barriers excessively due to their inclusion in all of the
write_*() helper functions.

Barriers should be used explicitly in assembler or C code
when modifying processor state that requires the barriers in
order to enable review of correctness of the code.

This patch removes the barriers from the helper functions and
introduces them as necessary elsewhere in the code.

PORTING NOTE: check any port of Trusted Firmware for use of
system register helper functions for reliance on the previous
barrier behaviour and add explicit barriers as necessary.

Fixes ARM-software/tf-issues#92

Change-Id: Ie63e187404ff10e0bdcb39292dd9066cb84c53bf

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Merge pull request #48 from danh-arm/dh/major-refactoring

dh/major refactoring

Reduce deep nesting of header files

Reduce the number of header files included from other header
files as much as possible without splitting the files. Use forward
declarations where possible. This

Reduce deep nesting of header files

Reduce the number of header files included from other header
files as much as possible without splitting the files. Use forward
declarations where possible. This allows removal of some unnecessary
"#ifndef __ASSEMBLY__" statements.

Also, review the .c and .S files for which header files really need
including and reorder the #include statements alphabetically.

Fixes ARM-software/tf-issues#31

Change-Id: Iec92fb976334c77453e010b60bcf56f3be72bd3e

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Move include and source files to logical locations

Move almost all system include files to a logical sub-directory
under ./include. The only remaining system include directories
not under ./include

Move include and source files to logical locations

Move almost all system include files to a logical sub-directory
under ./include. The only remaining system include directories
not under ./include are specific to the platform. Move the
corresponding source files to match the include directory
structure.

Also remove pm.h as it is no longer used.

Change-Id: Ie5ea6368ec5fad459f3e8a802ad129135527f0b3

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