modules: add an Arm Ethos-U HAL module

Adding module files for building the Arm Ethos-U Core driver.
Updating TFLU module file to build Ethos-U operator.

Adding hal_ethos_u to west manifest.

Signed-off-by: Kristofer Jonsson <kristofer.jonsson@arm.com>
Signed-off-by: Fredrik Knutsson <fredrik.knutsson@arm.com>

modules/hal_ethos_u/CMakeLists.txt

@@ -0,0 +1,25 @@
+# Copyright 2022 Arm Limited and/or its affiliates <open-source-office@arm.com>
+#
+# SPDX-License-Identifier: Apache-2.0
+
+if(CONFIG_ARM_ETHOS_U AND CONFIG_MULTITHREADING)
+    set(ETHOSU_TARGET_NPU_CONFIG ${CONFIG_ARM_ETHOS_U_NPU_NAME})
+
+    # Mapping log level from Zephyr (none=0, err=1, wrn=2, inf=3, dbg=4) to
+    # Ethos-U driver (err=0, warn=1, info=2, debug=3)
+    set(ETHOSU_LOG_SEVERITY_MAP err err warning info debug)
+    list(LENGTH ETHOSU_LOG_SEVERITY_MAP ETHOSU_LOG_SEVERITY_MAP_LENGTH)
+
+    if ("${CONFIG_ARM_ETHOS_U_LOG_LEVEL}" LESS_EQUAL "${ETHOSU_LOG_SEVERITY_MAP_LENGTH}")
+        list(GET ETHOSU_LOG_SEVERITY_MAP ${CONFIG_ARM_ETHOS_U_LOG_LEVEL} ETHOSU_LOG_SEVERITY)
+    else()
+        set(ETHOSU_LOG_SEVERITY debug)
+    endif()
+
+    add_subdirectory(${ZEPHYR_CURRENT_MODULE_DIR} ethos-u-core-driver)
+
+    target_link_libraries(ethosu_core_driver PUBLIC
+       zephyr_interface)
+
+    zephyr_link_libraries(ethosu_core_driver)
+endif()

modules/hal_ethos_u/Kconfig

@@ -0,0 +1,45 @@
+# Copyright 2021-2022 Arm Limited and/or its affiliates <open-source-office@arm.com>
+#
+# SPDX-License-Identifier: Apache-2.0
+
+config ARM_ETHOS_U
+	bool "Ethos-U core driver"
+	default n
+	depends on MULTITHREADING
+	help
+	  This option enables the Arm Ethos-U core driver.
+
+menu "Arm Ethos-U NPU configuration"
+choice  ARM_ETHOS_U_NPU_CONFIG
+	prompt "Arm Ethos-U NPU configuration"
+	depends on ARM_ETHOS_U
+	default ARM_ETHOS_U55_128
+config ARM_ETHOS_U55_64
+	bool "using Ethos-U55 with 64 macs"
+config ARM_ETHOS_U55_128
+	bool "using Ethos-U55 with 128 macs"
+config ARM_ETHOS_U55_256
+	bool "using Ethos-U55 with 256 macs"
+config ARM_ETHOS_U65_128
+	bool "using Ethos-U65 with 128 macs"
+config ARM_ETHOS_U65_256
+	bool "using Ethos-U65 with 256 macs"
+config ARM_ETHOS_U65_512
+	bool "using Ethos-U65 with 512 macs"
+endchoice
+endmenu
+
+config ARM_ETHOS_U_NPU_NAME
+	string
+	default "ethos-u55-64" if ARM_ETHOS_U55_64
+	default "ethos-u55-128" if ARM_ETHOS_U55_128
+	default "ethos-u55-256" if ARM_ETHOS_U55_256
+	default "ethos-u65-128" if ARM_ETHOS_U65_128
+	default "ethos-u65-256" if ARM_ETHOS_U65_256
+	default "ethos-u65-512" if ARM_ETHOS_U65_512
+	help
+		Name of the used Arm NPU
+
+module = ARM_ETHOS_U
+module-str = arm_ethos_u
+source "subsys/logging/Kconfig.template.log_config"

modules/tflite-micro/CMakeLists.txt

@@ -23,6 +23,10 @@ if(CONFIG_TENSORFLOW_LITE_MICRO)
     zephyr_library_compile_definitions(CMSIS_NN)
   endif()
 
+  if (CONFIG_ARM_ETHOS_U)
+    set(ETHOSU_CO_PROCESSOR ethos_u)
+  endif()
+
   zephyr_library_sources(
     ${TENSORFLOW_LITE_MICRO_DIR}/tensorflow/lite/micro/simple_memory_allocator.cc
     ${TENSORFLOW_LITE_MICRO_DIR}/tensorflow/lite/micro/debug_log.cc
@@ -73,7 +77,7 @@ if(CONFIG_TENSORFLOW_LITE_MICRO)
     ${TENSORFLOW_LITE_MICRO_DIR}/tensorflow/lite/micro/kernels/detection_postprocess.cc
     ${TENSORFLOW_LITE_MICRO_DIR}/tensorflow/lite/micro/kernels/elementwise.cc
     ${TENSORFLOW_LITE_MICRO_DIR}/tensorflow/lite/micro/kernels/elu.cc
-    ${TENSORFLOW_LITE_MICRO_DIR}/tensorflow/lite/micro/kernels/ethosu.cc
+    ${TENSORFLOW_LITE_MICRO_DIR}/tensorflow/lite/micro/kernels/${ETHOSU_CO_PROCESSOR}/ethosu.cc
     ${TENSORFLOW_LITE_MICRO_DIR}/tensorflow/lite/micro/kernels/exp.cc
     ${TENSORFLOW_LITE_MICRO_DIR}/tensorflow/lite/micro/kernels/expand_dims.cc
     ${TENSORFLOW_LITE_MICRO_DIR}/tensorflow/lite/micro/kernels/fill.cc

west.yml

@@ -62,6 +62,11 @@ manifest:
       west-commands: west/west-commands.yml
       groups:
         - hal
+    - name: hal_ethos_u
+      revision: 90ada2ea5681b2a2722a10d2898eac34c2510791
+      path: modules/hal/ethos_u
+      groups:
+        - hal
     - name: hal_gigadevice
       revision: dd0e0322474462b58059e6fedaf1d67d2a0864d0
       path: modules/hal/gigadevice