| commit | 61da4d35575ddf7f62d4f5c687356f65a7246aed | [log] [tgz] |
|---|---|---|
| author | Anton Moberg <anton.moberg@arm.com> | Tue Dec 22 16:00:31 2020 +0100 |
| committer | Anton Moberg <anton.moberg@arm.com> | Wed Jan 27 15:27:28 2021 +0100 |
| tree | d87b749774bf4f1ee75a78cad2013816ae6dac2f | |
| parent | 91e0be55cf752112c60480faefe124cfd8ff211c [diff] |
MLBEDSW-3796 Ethos-U driver interface multiple NPUs ---ethosu_driver--- Modified: Declarations for the driver interfaces to support multiNPU (takes *drv) Added: ethosu_register_driver(...) to allow for a specific NPU driver to be instantiated Added: ethosu_deregister_Driver(...) to allow for a specific NPU driver to be de-registered Added: ethosu_reserve_driver(...) to reserve & return the first NPU driver instance available Added: ethosu_release_driver(...) to release a specific NPU driver instance and make it available again Added: *registered_drivers - A static linked list of drivers ready be used ---ethosu_pmu--- Modified: Declarations for pmu interfaces to support multiNPU (takes *drv) ---ethosu_device--- Modified: Resolved a circular include dependency (Remove include and add ETHOSU_PMU_NCOUNTERS macro) Change-Id: Iede41cd41bb0d5d483bd9d929d1b6c9ca5d3c48e
This repository contains a device driver for the Arm Ethos-U NPU.
The source code comes with a CMake based build system. The driver is expeced to be cross compiled for any of the supported Arm Cortex-m CPUs, which will require the user to setup a custom toolchain file.
The user is also required to define CMAKE_SYSTEM_PROCESSOR for the target CPU, for example cortex-m55+nodsp+nofp. This can be done either in the toolchain file or on the command line.
$ mkdir build $ cd build $ cmake .. -DCMAKE_TOOLCHAIN_FILE=<toolchain> -DCMAKE_SYSTEM_PROCESSOR=cortex-m<nr><features> $ make
For running the driver on Arm CPUs which are configured with datacache, the cache maintenance functions in the driver are exported with weakly linked symbols that should be overriden. An example implementation using the CMSIS primitives found in cachel1_armv7.h could be as below:
extern "C" {
void ethosu_flush_dcache(uint32_t *p, size_t bytes) {
if (p)
SCB_CleanDCache_by_Addr(p, bytes);
else
SCB_CleanDCache();
}
void ethosu_invalidate_dcache(uint32_t *p, size_t bytes) {
if (p)
SCB_InvalidateDCache_by_Addr(p, bytes);
else
SCB_InvalidateDCache();
}
}
The Arm Ethos-U Core Driver is provided under an Apache-2.0 license. Please see LICENSE.txt for more information.
The Arm Ethos-U project welcomes contributions under the Apache-2.0 license.
Before we can accept your contribution, you need to certify its origin and give us your permission. For this process we use the Developer Certificate of Origin (DCO) V1.1 (https://developercertificate.org).
To indicate that you agree to the terms of the DCO, you "sign off" your contribution by adding a line with your name and e-mail address to every git commit message. You must use your real name, no pseudonyms or anonymous contributions are accepted. If there are more than one contributor, everyone adds their name and e-mail to the commit message.
Author: John Doe \<john.doe@example.org\> Date: Mon Feb 29 12:12:12 2016 +0000 Title of the commit Short description of the change. Signed-off-by: John Doe john.doe@example.org Signed-off-by: Foo Bar foo.bar@example.org
The contributions will be code reviewed by Arm before they can be accepted into the repository.
Please see Security.