Some of our specialized sections are not prefixed with the conventional
period. The compiler uses input section names to derive certain other
section names (e.g. `.rela.text`, `.relacpu_ops`), and these can be
difficult to select in linker scripts when there is a lack of a
delimiter.
This change introduces the period prefix to all specialized section
names.
BREAKING-CHANGE: All input and output linker section names have been
prefixed with the period character, e.g. `cpu_ops` -> `.cpu_ops`.
Change-Id: I51c13c5266d5975fbd944ef4961328e72f82fc1c
Signed-off-by: Chris Kay <chris.kay@arm.com>
A runtime service is registered using the ``DECLARE_RT_SVC()`` macro, specifying
the name of the service, the range of OENs covered, the type of service and
initialization and call handler functions. This macro instantiates a ``const struct rt_svc_desc`` for the service with these details (see ``runtime_svc.h``).
This structure is allocated in a special ELF section ``rt_svc_descs``, enabling
This structure is allocated in a special ELF section ``.rt_svc_descs``, enabling
the framework to find all service descriptors included into BL31.
The specific service for a SMC Function is selected based on the OEN and call
@ -2165,7 +2165,7 @@ To use bakery locks when ``USE_COHERENT_MEM`` is disabled, the lock data structu
has been redesigned. The changes utilise the characteristic of Lamport's Bakery
algorithm mentioned earlier. The bakery_lock structure only allocates the memory
for a single CPU. The macro ``DEFINE_BAKERY_LOCK`` allocates all the bakery locks
needed for a CPU into a section ``bakery_lock``. The linker allocates the memory
needed for a CPU into a section ``.bakery_lock``. The linker allocates the memory
for other cores by using the total size allocated for the bakery_lock section
and multiplying it with (PLATFORM_CORE_COUNT - 1). This enables software to
perform software cache maintenance on the lock data structure without running
@ -2193,7 +2193,7 @@ with n bakery locks are:
::
bakery_lock section start
.bakery_lock section start
|----------------|
| `bakery_info_t`| <-- Lock_0 per-CPU field
| Lock_0 | for CPU0
@ -2230,7 +2230,7 @@ with n bakery locks are:
Consider a system of 2 CPUs with 'N' bakery locks as shown above. For an
operation on Lock_N, the corresponding ``bakery_info_t`` in both CPU0 and CPU1
``bakery_lock`` section need to be fetched and appropriate cache operations need
``.bakery_lock`` section need to be fetched and appropriate cache operations need
to be performed for each access.
On Arm Platforms, bakery locks are used in psci (``psci_locks``) and power controller
Chris Kay
2 years ago