feat(ethos-n)!: load NPU firmware at BL2
BL2 on Juno now loads the Arm(R) Ethos(TM)-N NPU firmware into a fixed
address, using the existing image loading framework.
Includes support for TRUSTED_BOARD_BOOT, if enabled, using the firmware
content and key certificates from the FIP.
Supports the ARM_IO_IN_DTB option so can specify the firmware location
from the dtb rather than it being hardcoded to the FIP
Update makefile to automatically embed the appropriate images into the
FIP.
BREAKING CHANGE: Building the FIP when TZMP1 support is enabled in the
NPU driver now requires a parameter to specify the NPU firmware file.
Signed-off-by: Rob Hughes <robert.hughes@arm.com>
Signed-off-by: Mikael Olsson <mikael.olsson@arm.com>
Change-Id: I8cd64fb20d58f8bd539facb085606213d6cead06
diff --git a/docs/getting_started/porting-guide.rst b/docs/getting_started/porting-guide.rst
index b3092c7..5b88fcb 100644
--- a/docs/getting_started/porting-guide.rst
+++ b/docs/getting_started/porting-guide.rst
@@ -587,6 +587,21 @@
Defines the Non-secure Access IDentity (NSAID) that the NPU shall use to
access the protected memory that contains inference data.
+- **ARM_ETHOSN_NPU_FW_IMAGE_BASE** and **ARM_ETHOSN_NPU_FW_IMAGE_LIMIT**
+
+- Provide FCONF entries to configure the image source for NPU firmware (and certificates).
+
+- Add MMU mappings such that:
+
+ - BL2 can write the NPU firmware into the region defined by
+ ``ARM_ETHOSN_NPU_FW_IMAGE_BASE`` and ``ARM_ETHOSN_NPU_FW_IMAGE_LIMIT``
+ - BL31 (SiP service) can read the NPU firmware from the same region
+
+- Add the firmware image ID ``ARM_ETHOSN_NPU_FW_IMAGE_ID`` to the list of images loaded by BL2
+
+Please see the reference implementation code for the Juno platform as an example.
+
+
The following constant is optional. It should be defined to override the default
behaviour of the ``assert()`` function (for example, to save memory).