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This patch updates the user guide section about the memory layout.
  - Explain the verifications that the linker scripts does on the
    global memory layout.
  - Refer to the new linker symbols.
  - Describe the linker symbols exported to the trusted firmware code.

Change-Id: I033ab2b867e8b9776deb4185b9986bcb8218f286

A single binary can be compiled using a command such as:
  make CROSS_COMPILE=aarch64-none-elf- bl1

Also make use of brackets consistent in the Makefile.

Change-Id: I2180fdb473411ef7cffe39670a7b2de82def812e

- Large RAM-disks may have trouble starting with 2GB of memory.
- Increase from 2GB to 4GB in FDT.

Change-Id: I12c1b8e5db41114b88c69c48621cb21247a6a6a7

Any asynchronous exception caused by the firmware should be handled
in the firmware itself.  For this reason, unmask SError exceptions
(and Debug ones as well) on all boot paths.  Also route external
abort and SError interrupts to EL3, otherwise they will target EL1.

Change-Id: I9c191d2d0dcfef85f265641c8460dfbb4d112092

Global and static variables are expected to be initialised to zero
by default.  This is specified by the C99 standard. This patch
removes some unnecessary initialisations of such variables.

It fixes a compilation warning at the same time:
  plat/fvp/bl31_plat_setup.c:82:3: warning: missing braces around
  initializer [-Wmissing-braces]
     section("tzfw_coherent_mem"))) = {0};
     ^
  plat/fvp/bl31_plat_setup.c:82:3: warning: (near initialization for
  ‘ns_entry_info[0]’) [-Wmissing-braces]

Note that GCC should not have emitted this warning message in the
first place.  The C Standard permits braces to be elided around
subaggregate initializers.  See this GCC bug report:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53119

Change-Id: I13cb0c344feb9803bca8819f976377741fa6bc35

Change-Id: I4e2a9daa97e3be3d2f53894f2ec7947ba6bb3a16

Change-Id: I5e47ba96e128d3a793517441f5a6c9f2ccbdfc66