| ; Copyright (c) 2021 Arm Limited. All rights reserved. |
| ; SPDX-License-Identifier: Apache-2.0 |
| ; |
| ; Licensed under the Apache License, Version 2.0 (the "License"); |
| ; you may not use this file except in compliance with the License. |
| ; You may obtain a copy of the License at |
| ; |
| ; http://www.apache.org/licenses/LICENSE-2.0 |
| ; |
| ; Unless required by applicable law or agreed to in writing, software |
| ; distributed under the License is distributed on an "AS IS" BASIS, |
| ; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| ; See the License for the specific language governing permissions and |
| ; limitations under the License. |
| |
| ; ************************************************************* |
| ; *** Scatter-Loading Description File *** |
| ; ************************************************************* |
| ; Please see docs/sections/appendix.md for memory mapping |
| ; information. |
| ; |
| ; Note: Ethos-U NPU can access BRAM, internal SRAM and the DDR |
| ; sections => activation buffers and the model should |
| ; only be placed in those regions. |
| ; |
| |
| ;--------------------------------------------------------- |
| ; First load region (SRAM/BRAM) 2MiB region |
| ;--------------------------------------------------------- |
| LOAD_REGION_0 0x11000000 0x00200000 |
| { |
| ;----------------------------------------------------- |
| ; 0.5 MiB of SRAM/BRAM region. Our vector table also |
| ; resides here as the default INITSVTOR is 0x11000000. |
| ; We currently do not use the ITCM for any code, but |
| ; could potentially put some critical code in there |
| ; if we need to. |
| ;----------------------------------------------------- |
| bram.bin 0x11000000 0x00080000 |
| { |
| *.o (RESET, +First) |
| * (InRoot$$Sections) |
| |
| ; Essentially only RO (code + data) |
| .ANY (+RO) |
| } |
| |
| ;----------------------------------------------------- |
| ; Next 0.5 MiB of SRAM/BRAM region for RO, RW and ZI |
| ; data, 8 byte aligned. |
| ;----------------------------------------------------- |
| data.bin 0x11080000 ALIGN 8 0x00080000 |
| { |
| ; Any RO-DATA |
| .ANY (+RO-DATA) |
| |
| ; Any R/W and/or zero initialised data |
| .ANY(+RW +ZI) |
| } |
| |
| ;----------------------------------------------------- |
| ; 768 KiB of remaining part of the 1MiB BRAM used as |
| ; heap space. |
| ;----------------------------------------------------- |
| ARM_LIB_HEAP 0x11100000 EMPTY ALIGN 8 0x000C0000 |
| {} |
| |
| ;----------------------------------------------------- |
| ; 32 kiB of stack space occupying the DTCM region. |
| ;----------------------------------------------------- |
| ARM_LIB_STACK 0x30000000 EMPTY ALIGN 8 0x00008000 |
| {} |
| |
| ;----------------------------------------------------- |
| ; FPGA internal SRAM of 2MiB - reserved for activation |
| ; buffers. The total memory is 4 MiB (we are choosing |
| ; to not use the other bank). This region should have |
| ; 3 cycle read latency from both CPU and Ethos-U NPU. |
| ;----------------------------------------------------- |
| isram.bin 0x31000000 UNINIT ALIGN 16 0x00200000 |
| { |
| ; Cache area (if used) |
| *.o (.bss.NoInit.ethos_u_cache) |
| |
| ; activation buffers a.k.a tensor arena when |
| ; memory mode sram only or shared sram |
| *.o (.bss.NoInit.activation_buf_sram) |
| } |
| } |
| |
| ;--------------------------------------------------------- |
| ; Second load region (DDR) |
| ;--------------------------------------------------------- |
| LOAD_REGION_1 0x70000000 0x02000000 |
| { |
| ;----------------------------------------------------- |
| ; 32 MiB of DDR space for neural network model, |
| ; input vectors and labels. If the activation buffer |
| ; size required by the network is bigger than the |
| ; SRAM size available, it is accommodated here. |
| ;----------------------------------------------------- |
| ddr.bin 0x70000000 ALIGN 16 0x02000000 |
| { |
| ; nn model's baked in input matrices |
| *.o (ifm) |
| |
| ; nn model's default space |
| *.o (nn_model) |
| |
| ; labels |
| *.o (labels) |
| |
| ; activation buffers a.k.a tensor arena when memory mode dedicated sram |
| *.o (activation_buf_dram) |
| } |
| |
| ;----------------------------------------------------- |
| ; The following regions are for use by the FVP to |
| ; allow loading or dumping of dynamic data into or |
| ; from the memory. These regions are mentioned in |
| ; the CMake subsystem profile. Do not change the |
| ; addresses and sizes below in isolation. |
| ;----------------------------------------------------- |
| ; 32 MiB of model space for run-time load of model |
| ;----------------------------------------------------- |
| runtime_model 0x90000000 EMPTY ALIGN 16 0x02000000 |
| {} |
| |
| ;----------------------------------------------------- |
| ; 16 MiB of IFM space for run-time loading (FVP only) |
| ;----------------------------------------------------- |
| runtime_ifm 0x92000000 EMPTY ALIGN 16 0x01000000 |
| {} |
| |
| ;----------------------------------------------------- |
| ; 16 MiB of OFM space for run-time loading (FVP only) |
| ;----------------------------------------------------- |
| runtime_ofm 0x93000000 EMPTY ALIGN 16 0x01000000 |
| {} |
| } |