Use --gc-sections during link

All common functions are being built into all binary images,
whether or not they are actually used. This change enables the
use of -ffunction-sections, -fdata-sections and --gc-sections
in the compiler and linker to remove unused code and data from
the images.

Change-Id: Ia9f78c01054ac4fa15d145af38b88a0d6fb7d409
Place assembler functions in separate sections

This extends the --gc-sections behaviour to the many assembler
support functions in the firmware images by placing each function
into its own code section. This is achieved by creating a 'func'
macro used to declare each function label.

Fixes ARM-software/tf-issues#80

Change-Id: I301937b630add292d2dec6d2561a7fcfa6fec690
Move console.c to pl011 specific driver location

Rename drivers/console/console.c to
drivers/arm/peripherals/pl011/pl011_console.c. This makes it clear
that this is a pl011 specific console implementation.

Fixes ARM-software/tf-issues#129

Change-Id: Ie2f8109602134c5b86993e32452c70734c45a3ed
Merge pull request #36 from athoelke/at/gc-sections-80

Using GCC --gc-sections to eliminate unused code and data
Rename FVP "mmap" array to avoid name confusion

Rename the array "mmap" in plat/fvp/aarch64/plat_common.c to
"fvp_mmap", to avoid confusion with the array of the same name
in lib/arch/aarch64/xlat_tables.c

Fixes ARM-software/tf-issues#114

Change-Id: I61478c0070aa52d5dcf5d85af2f353f56c060cfb
Allocate single stacks for BL1 and BL2

The BL images share common stack management code which provides
one coherent and one cacheable stack for every CPU. BL1 and BL2
just execute on the primary CPU during boot and do not require
the additional CPU stacks. This patch provides separate stack
support code for UP and MP images, substantially reducing the
RAM usage for BL1 and BL2 for the FVP platform.

This patch also provides macros for declaring stacks and
calculating stack base addresses to improve consistency where
this has to be done in the firmware.

The stack allocation source files are now included via
platform.mk rather than the common BLx makefiles. This allows
each platform to select the appropriate MP/UP stack support
for each BL image.

Each platform makefile must be updated when including this
commit.

Fixes ARM-software/tf-issues#76

Change-Id: Ia251f61b8148ffa73eae3f3711f57b1ffebfa632
Merge pull request #40 from athoelke/at/up-stacks-76-v2

Allocate single stacks for BL1 and BL2 (v2)
Remove redundant code from bl1_plat_helpers.S

Remove redundant code in plat_secondary_cold_boot_setup() in
plat/fvp/aarch64/bl1_plat_helpers.S.

Fixes ARM-software/tf-issues#136

Change-Id: I98c0a46d95cfea33125e34e609c83dc2c97cd86e
Merge pull request #45 from danh-arm/dh/tf-issues#114

Rename FVP "mmap" array to avoid name confusion
Merge pull request #44 from danh-arm/dh/tf-issues#136

Remove redundant code from bl1_plat_helpers.S
Merge pull request #43 from danh-arm/dh/tf-issues#129

Move console.c to pl011 specific driver location
Add TrustZone (TZC-400) driver

The TZC-400 performs security checks on transactions to memory or
peripherals. Separate regions can be created in the address space each
with individual security settings.

Limitations:
This driver does not currently support raising an interrupt on access
violation.

Change-Id: Idf8ed64b4d8d218fc9b6f9d75acdb2cd441d2449
Enable secure memory support for FVPs

- Use the TrustZone controller on Base FVP to program DRAM access
  permissions. By default no access to DRAM is allowed if
  'secure memory' is enabled on the Base FVP.
- The Foundation FVP does not have a TrustZone controller but instead
  has fixed access permissions.
- Update FDTs for Linux to use timers at the correct security level.
- Starting the FVPs with 'secure memory' disabled is also supported.

Limitations:
Virtio currently uses a reserved NSAID. This will be corrected in
future FVP releases.

Change-Id: I0b6c003a7b5982267815f62bcf6eb82aa4c50a31
FVP secure memory support documentation

Fixes ARM-software/tf-issues#64

Change-Id: I4e56c25f9dc7f486fbf6fa2f7d8253874119b989
Merge pull request #33 from hliebel/hl/secure-memory

Hl/secure memory