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Diffstat (limited to 'cpu-supplement/aarch64.rst')
-rw-r--r-- | cpu-supplement/aarch64.rst | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/cpu-supplement/aarch64.rst b/cpu-supplement/aarch64.rst index a102817..1e9b8d6 100644 --- a/cpu-supplement/aarch64.rst +++ b/cpu-supplement/aarch64.rst @@ -9,7 +9,7 @@ This chapter discusses the dependencies of the *ARM AArch64 architecture* (https://en.wikipedia.org/wiki/ARM_architecture#AArch64_features) in this port of RTEMS. The ARMv8-A versions are supported by RTEMS. Processors with a MMU -use a static configuration which is set up during system start. SMP is not +use a static configuration which is set up during system start. SMP is supported. **Architecture Documents** @@ -73,6 +73,11 @@ A flat 64-bit or 32-bit memory model is supported depending on the selected mult variant. All AArch64 CPU variants support a built-in MMU for which basic initialization for a flat memory model is handled. +Note that memcpy() and memset() must not be used on device memory as those +functions are hand-optimized and will take advantage of unaligned accesses. +*As per ARM*(https://developer.arm.com/documentation/ka004708/latest), unaligned +accesses are not permitted for device memory. + Interrupt Processing ==================== @@ -124,7 +129,9 @@ actions: Symmetric Multiprocessing ========================= -SMP is not currently supported on ARMv8-A. +SMP is supported on ARMv8-A. Available platforms are: + +- Xilinx ZynqMP (QEMU and hardware using PSCI via ARM Trusted Firmware) Thread-Local Storage ==================== |