feat(ethos-n): add support to set up NSAID
For the TZC to allow the Arm(R) Ethos(TM)-N NPU to access the buffers
allocated in a protected memory region, it must include the correct
NSAID for that region in its transactions to the memory. This change
updates the SiP service to configure the NSAIDs specified by a platform
define. When doing a protected access the SiP service now configures the
NSAIDs specified by the platform define. For unprotected access the
NSAID is set to zero.
Signed-off-by: Rajasekaran Kalidoss <rajasekaran.kalidoss@arm.com>
Signed-off-by: Rob Hughes <robert.hughes@arm.com>
Signed-off-by: Mikael Olsson <mikael.olsson@arm.com>
Change-Id: I3360ef33705162aba5c67670386922420869e331
diff --git a/docs/getting_started/porting-guide.rst b/docs/getting_started/porting-guide.rst
index 8d6a2bf..b3092c7 100644
--- a/docs/getting_started/porting-guide.rst
+++ b/docs/getting_started/porting-guide.rst
@@ -574,6 +574,19 @@
PLAT_PARTITION_BLOCK_SIZE := 4096
$(eval $(call add_define,PLAT_PARTITION_BLOCK_SIZE))
+If the platform port uses the Arm® Ethos™-N NPU driver with TZMP1 support
+enabled, the following constants must also be defined.
+
+- **ARM_ETHOSN_NPU_PROT_FW_NSAID**
+
+ Defines the Non-secure Access IDentity (NSAID) that the NPU shall use to
+ access the protected memory that contains the NPU's firmware.
+
+- **ARM_ETHOSN_NPU_PROT_DATA_NSAID**
+
+ Defines the Non-secure Access IDentity (NSAID) that the NPU shall use to
+ access the protected memory that contains inference data.
+
The following constant is optional. It should be defined to override the default
behaviour of the ``assert()`` function (for example, to save memory).