diff options
Diffstat (limited to 'docs/sections/building.md')
| -rw-r--r-- | docs/sections/building.md | 102 |
1 files changed, 4 insertions, 98 deletions
diff --git a/docs/sections/building.md b/docs/sections/building.md index 6241286..c53b1f5 100644 --- a/docs/sections/building.md +++ b/docs/sections/building.md @@ -2,23 +2,22 @@ ## Contents -- [Building the Code Samples application from sources](#building-the-ml-embedded-code-sample-applications-from-sources) +- [Building the ML embedded code sample applications from sources](#building-the-ml-embedded-code-sample-applications-from-sources) - [Contents](#contents) - [Build prerequisites](#build-prerequisites) - [Build options](#build-options) - [Build process](#build-process) - [Preparing build environment](#preparing-build-environment) - [Create a build directory](#create-a-build-directory) - - [Configuring the build for `MPS3: SSE-300`](#configuring-the-build-for-mps3-sse-300) - - [Configuring the build for `MPS3: SSE-200`](#configuring-the-build-for-mps3-sse-200) + - [Configuring the build for MPS3: SSE-300](#configuring-the-build-for-mps3-sse-300) + - [Configuring the build for MPS3: SSE-200](#configuring-the-build-for-mps3-sse-200) - [Configuring native unit-test build](#configuring-native-unit-test-build) - - [Configuring the build for `simple_platform`](#configuring-the-build-for-simple_platform) + - [Configuring the build for simple_platform](#configuring-the-build-for-simple_platform) - [Building the configured project](#building-the-configured-project) - [Building timing adapter with custom options](#building-timing-adapter-with-custom-options) - [Add custom inputs](#add-custom-inputs) - [Add custom model](#add-custom-model) - [Optimize custom model with Vela compiler](#optimize-custom-model-with-vela-compiler) - - [Memory constraints](#memory-constraints) - [Automatic file generation](#automatic-file-generation) This section assumes the use of an **x86 Linux** build machine. @@ -674,99 +673,6 @@ Vela Compiler documentation for more details. > **Note:** By default, use of the Ethos-U55 NPU is enabled in the CMake configuration. This could be changed by passing `-DETHOS_U55_ENABLED`. -## Memory constraints - -Both the MPS3 Fixed Virtual Platform and the MPS3 FPGA platform share -the linker script (scatter file) for SSE-300 design. The design is set -by the CMake configuration parameter `TARGET_SUBSYSTEM` as described in -the previuous section. - -The memory map exposed by this design is presented in Appendix 1. This -can be used as a reference when editing the scatter file, especially to -make sure that region boundaries are respected. The snippet from MPS3's -scatter file is presented below: - -``` -;--------------------------------------------------------- -; First load region -;--------------------------------------------------------- -LOAD_REGION_0 0x00000000 0x00080000 -{ - ;----------------------------------------------------- - ; First part of code mem -- 512kiB - ;----------------------------------------------------- - itcm.bin 0x00000000 0x00080000 - { - *.o (RESET, +First) - * (InRoot$$Sections) - .ANY (+RO) - } - - ;----------------------------------------------------- - ; 128kiB of 512kiB bank is used for any other RW or ZI - ; data. Note: this region is internal to the Cortex-M CPU - ;----------------------------------------------------- - dtcm.bin 0x20000000 0x00020000 - { - .ANY(+RW +ZI) - } - - ;----------------------------------------------------- - ; 128kiB of stack space within the DTCM region - ;----------------------------------------------------- - ARM_LIB_STACK 0x20020000 EMPTY ALIGN 8 0x00020000 - {} - - ;----------------------------------------------------- - ; 256kiB of heap space within the DTCM region - ;----------------------------------------------------- - - ARM_LIB_HEAP 0x20040000 EMPTY ALIGN 8 0x00040000 - {} - - ;----------------------------------------------------- - ; SSE-300's internal SRAM - ;----------------------------------------------------- - isram.bin 0x21000000 UNINIT ALIGN 16 0x00080000 - { - ; activation buffers a.k.a tensor arena - *.o (.bss.NoInit.activation_buf) - } -} - -;--------------------------------------------------------- -; Second load region -;--------------------------------------------------------- -LOAD_REGION_1 0x60000000 0x02000000 -{ - ;----------------------------------------------------- - ; 32 MiB of DRAM space for nn model and input vectors - ;----------------------------------------------------- - dram.bin 0x60000000 ALIGN 16 0x02000000 - { - ; nn model's baked in input matrices - *.o (ifm) - - ; nn model - *.o (nn_model) - - ; if the activation buffer (tensor arena) doesn't - ; fit in the SRAM region, we accommodate it here - *.o (activation_buf) - } -} -``` - -It is worth noting that in the bitfile implementation, only the BRAM, -internal SRAM and DDR memory regions are accessible to the Ethos-U55 NPU -block. In the above snippet, the internal SRAM region memory can be seen -to be utilized by activation buffers with a limit of 512kiB. If used, -this region will be written to by the Ethos-U55 NPU block frequently. A bigger -region of memory for storing the model is placed in the DDR region, -under LOAD_REGION_1. The two load regions are necessary as the MPS3's -motherboard configuration controller limits the load size at address -0x00000000 to 512kiB. This has implications on how the application **is -deployed** on MPS3 as explained under the section 3.8.3. ## Automatic file generation |