juno: Add support for BL3-2 image ...

This patch implements the TSP on Juno. It executes from Secure RAM.

Also, the other bootloader images (i.e. BL1 R/W, BL2 and BL3-1) have
been moved around. The reason is, although there was enough space
overall to store the TSP in SRAM, there was no contiguous free chunk
of SRAM big enough to hold it.

This patch keeps the overall memory layout (i.e. keeping BL1 R/W at
the bottom, BL2 at the top and BL3-1 in between) but moves the base
addresses of all the bootloader images in such a way that:
 - memory fragmentation is reduced enough to fit BL3-2 in;
 - new base addresses are suitable for release builds as well as debug
   ones;
 - each image has a few extra kilobytes for future growth.
   BL3-1 and BL3-2 are the images which received the biggest slice
   of the cake since they will most probably grow the most.

A few useful numbers for reference (valid at the time of this patch):
        |-----------------------|-------------------------------
        |  image size (debug)   |  extra space for the future
--------|-----------------------|-------------------------------
BL1 R/W |         28 KB         |            4 KB
BL2     |         48 KB         |            4 KB
BL3-1   |         96 KB         |            8 KB
BL3-2   |         56 KB         |            8 KB
--------|-----------------------|-------------------------------
Total   |        228 KB         |           24 KB       = 252 KB
--------|-----------------------|-------------------------------

Note: On Juno, although the Secure RAM is 256 KB, the first 4KB
are reserved for the AP/SCP mailboxes.

Change-Id: I999ec39589c45beabe1ecd772641623e58569a6e

juno: Access MPIDR_EL1 register directly in assembler ...

Instead of using the read_mpidr() helper functions to read the
MPIDR_EL1 system register, assembler coded functions should
use MRS/MSR instructions. This results in faster and more
compact code.

Change-Id: I42bb61a926113c4f80aa1ce72ee29ab26cd8fa43

juno: Correct usage of mem. barriers in MMU setup code ...

Add memory barriers to ensure that all translation table writes
have drained into memory, the TLB invalidation is complete,
and translation register writes are committed before enabling
the MMU.

Also ensure the MMU enable takes effect immediately.

These changes are necessary because of commit 8cec598ba3b6.

Change-Id: I65b5c3593af27f19da3fd2170c55f631f1ce7b81

juno: Remove unused disable_mmu() function ...

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.

This patch removes the C version of this function in juno code.
An assembly version has been introduced in commit 2f5dcfef1db4.

Change-Id: I0de10dbe2db8d22855bf1f60f1e48540a4861cb6

juno: Constify some variables ...

Mark some of the variables in the juno code as 'const' where possible.

Change-Id: I14b19cccff5993c08a0ca11cd42e57d5435081f4

Remove duplicate TZC-400 header file ...

Because we needed to configure the trustzone controller on Juno,
minimal support for the TZC-400 had been added. However, a proper
TZC-400 driver has been introduced since then. This patch removes
the old, minimal header file and makes the necessary changes to use
the new one.

Change-Id: I4af1d8fb423e3214a0020c527bd2c1c2fcdb5c56

juno: Fix build errors due to recent changes ...

This is a miscellaneous commit that fixes all build
errors introduced by the rebase of the Juno codebase
on the latest trusted firmware.

 - Make codebase consistent in its use of #include "" syntax
   for user includes and #include <> syntax for system includes.

 - Sort header files alphabetically

 - Use tag names for structure types.
   Replace instances of the former io_handle and io_dev_handle
   types with uintptr_t.

 - Review the .c and .S files for which header files really need
   including and reorder the #include statements alphabetically.

Change-Id: I1d409fafb6dc257a38992ee15b22b0e890d040b0

Revert "juno: Initialise architected timer in BL3-1" ...

This reverts commit ff7480a.
because the architected timer is now initialised in architecture
code and no longer in platform code. See commit 9e86490f8f1.

Change-Id: I0f12e006ba1574c7c0fc03c616503f33958b9596

juno: Remove vpath usage in platform makefile ...

As per commit bee824171189, remove all usage of the vpath keyword
in makefiles. Specify the relative paths to source files instead.

Also reorder source files in makefiles alphabetically.

Change-Id: Ic85c396f34e7a25a7239533f12bde3eed8da0ca2

juno: Fix base addresses for UART2 and UART3 ...

Also remove 'PL011_BASE' macro because it is no longer used.

Change-Id: Iefe94037cf67293b630d5256e6cac3f82abda807

juno: Rename Juno "mmap" array to avoid name confusion ...

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

Change-Id: If2f2976b1bc9177a14625a2a4559c32c5236090f

juno: Place assembler functions in separate sections ...

This extends the --gc-sections behaviour to the Juno-specific assembler
support functions in the firmware images by placing each function
into its own code section. This is achieved by using the 'func'
macro when declaring a function label.

Change-Id: I738370c0515face104531ab7944cc5bbdad49a9d

juno: Initialise UART console in all bootloader stages ...

Ensure that each bootloader stage initializes the UART console
independently. As a result, both BL3-1 and BL2 platform code now
calls console_init() instead of relying on BL1 to perform console
setup.

Also perform the console initialisation earlier in BL1 because
it must be done before it is used e.g. through a printf() call
in an assert() statement.

Change-Id: I8bb58cf1f0e42a71a01abf65da30bfa4ae533665

juno: Semihosting: Fix file mode to load binaries on Windows ...

Propagate commit 886278e55f3 on Juno.

Change-Id: I1e5e1e3c019c51af6ed54bb02fee6b1ebc201a2a

juno: Fix build further to changes on UP/MP stacks ...

These changes are necessary because of commit 2bf28e620a6.

Change-Id: I3e42e97638fe895c885bcbf44392a899284956f8

juno: Fix build further to console driver changes ...

Change-Id: I5ff5c1a6253d29fca0b271c08d74fafe33cd8f2d

juno: Fix the disable_mmu code ...

Remove the hard coding of all the MMU related registers with 0 and
disable MMU by clearing the M and C bit in SCTLR_ELx.

Also remove use of partially qualified asm helper functions.

Change-Id: I383083f93a0a53143e58f146faf7755198f6a6ca

juno: Remove use of partially qualified asm helper functions ...

Change-Id: I6d7c040d7569df601a12007dd2413c39f40f07ce

juno: Increase L2RAM wait state to support higher cluster frequencies ...

Change-Id: I7f1fb4ed01ed73de1196ca17ed6fc1524478ec75

Enable Debug and SError exceptions on warm boot path ...

Enable Debug and SError exceptions:
 - when receiving an SMC;
 - when a CPU is physically powered up (upon resumption from suspend
   or in response to a PSCI cpu_on call)

Change-Id: I7e5613e34034be6ed68ec9e2aef4de66aa5ac65e

Do not route external abort and SError interrupts to EL3 ...

The software running at a given exception level should handle
external aborts and SError interrupts itself.

Change-Id: Ic249fdf8472e0c64306ce3913562a2ac89c78627

juno: Implement plat_get_syscnt_freq() function ...

In the Juno port, this function returns the first entry of the
frequency modes table from the memory mapped generic timer.

Workaround: Define BL32 base address ...

Workaround for issue #68

juno: Pull out some software components ...

On Juno, we don't need the following components so this patch
removes them of the images:
 - semihosting support;
 - FVP power controller support;
 - GICv3 support.

juno: Improve TZC-400 initialisation code ...

- Distinguish Juno specific from platform agnostic constants
 - Define constants for Juno TZC-400 NSAID

tzc-400: Export some TZC-400 related constants in a generic header

juno: Expose NIC-400 constants in the platform header file ...

It is easier to have all platform constants in the same place.

juno: Implement plat_report_exception() function ...

As for FVP platforms, Juno provides some LEDs that we can
use to report exceptions during the early boot code.

juno: BL2: Load BL30 ...

Signed-off-by: Ryan Harkin <ryan.harkin@linaro.org>

Add optional BL30 to fip make rule ...

Signed-off-by: Jon Medhurst <tixy@linaro.org>