README.fsl-trustzone-components 1.3 KB

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  1. Freescale ARM64 SoCs like LS2080A have ARM TrustZone components like
  2. TZPC-BP147 (TrustZone Protection Controller) and TZASC-400 (TrustZone
  3. Address Space Controller).
  4. While most of the configuration related programming of these peripherals
  5. is left to a root-of-trust security software layer (running in EL3
  6. privilege mode), but still some configurations of these peripherals
  7. might be required while the bootloader is executing in EL3 privilege
  8. mode. The following sections define how to turn on these features for
  9. LS2080A like SoCs.
  10. TZPC-BP147 (TrustZone Protection Controller)
  11. ============================================
  12. - Depends on CONFIG_FSL_TZPC_BP147 configuration flag.
  13. - Separates Secure World and Normal World on-chip RAM (OCRAM) spaces.
  14. - Provides a programming model to set access control policy via the TZPC
  15. TZDECPROT Registers.
  16. TZASC-400 (TrustZone Address Space Controller)
  17. ==============================================
  18. - Depends on CONFIG_FSL_TZASC_400 configuration flag.
  19. - Separates Secure World and Normal World external memory spaces for bus masters
  20. such as processors and DMA-equipped peripherals.
  21. - Supports 8 fully programmable address regions, initially inactive at reset,
  22. and one base region, always active, that covers the remaining address space.