SPRADC1 june   2023 DRA829J , DRA829J-Q1 , DRA829V , DRA829V-Q1 , TDA4VM , TDA4VM-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1 Different Types of Memories on the TDA4VM
  5. 2Memory Overview and Intended Usage
    1. 2.1 PSROM
      1. 2.1.1 Typical Use Cases
    2. 2.2 PSRAM
      1. 2.2.1 Typical Use Cases
    3. 2.3 MSMC RAM
      1. 2.3.1 Typical Use Cases
      2. 2.3.2 Relevant Links
    4. 2.4 MSRAM
      1. 2.4.1 Typical Use Cases
    5. 2.5 ARM Cortex A72 Subsystem
      1. 2.5.1 L1/L2 Cache Memory
      2. 2.5.2 L3 Memory
      3. 2.5.3 Relevant Links
    6. 2.6 ARM Cortex R5F Subsystem
      1. 2.6.1 L1 Memory System
      2. 2.6.2 Cache
      3. 2.6.3 Tightly Coupled Memory (TCM)
      4. 2.6.4 Typical Use Case
      5. 2.6.5 Relevant Links
    7. 2.7 TI's C6x Subsystem
      1. 2.7.1 Memory Layout
      2. 2.7.2 Relevant Links
    8. 2.8 TI's C7x Subsystem
      1. 2.8.1 Memory Layout
      2. 2.8.2 Relevant Links
    9. 2.9 DDR Subsystem
      1. 2.9.1 Relevant Links
  6. 3Performance numbers
    1. 3.1 SDK Data Sheet
    2. 3.2 Memory Access Latency
  7. 4Software Careabouts When Using Different Memories
    1. 4.1 How to Modify Memory Map for RTOS Firmwares
    2. 4.2 DDR Sharing Between RTOS Core and HLOS
    3. 4.3 MCU On-Chip RAM Usage by Bootloader
    4. 4.4 MSMC RAM Default SDK Usage
      1. 4.4.1 MSMC RAM Reserved Sections
      2. 4.4.2 MSMC RAM Configuration as Cache and SRAM
    5. 4.5 Usage of ATCM from MCU R5F
    6. 4.6 Usage of DDR to Execute Code from R5F
  8. 5Summary

MSMC RAM Reserved Sections

For TDA4VM (J721E) 8MB of MSMC RAM is present and mapped at 0x7000_0000. 128KB from start and 64KB from end is reserved by ATF and DMSC (for IPC) respectively and hence should not be used.

Table 4-2 MSMC RAM Reserved Sections
Name Start Address End Address Size Attributes Description
MSMC_MPU1 0x70000000 0x7001FFFF 128.00 KB RWIX MSMC reserved for ATF (Arm Trusted Firmware) on MPU1
Usable MSMC
(Default SDK assigns this to MSMC_C7x_1)
0x70020000 0x707E7FFF 7.78 KB RWIX MSMC for C7x_1
MSMC_DMSC 0x707F0000 0x707FFFFF 64.00 KB RWIX MSMC reserved for DMSC IPC