|Freescale ARM64 SoCs like LS2085A have ARM TrustZone components like
|TZPC-BP147 (TrustZone Protection Controller) and TZASC-400 (TrustZone
|Address Space Controller).
|While most of the configuration related programming of these peripherals
|is left to a root-of-trust security software layer (running in EL3
|privilege mode), but still some configurations of these peripherals
|might be required while the bootloader is executing in EL3 privilege
|mode. The following sections define how to turn on these features for
|LS2085A like SoCs.
|TZPC-BP147 (TrustZone Protection Controller)
|- Depends on CONFIG_FSL_TZPC_BP147 configuration flag.
|- Separates Secure World and Normal World on-chip RAM (OCRAM) spaces.
|- Provides a programming model to set access control policy via the TZPC
| TZDECPROT Registers.
|TZASC-400 (TrustZone Address Space Controller)
|- Depends on CONFIG_FSL_TZASC_400 configuration flag.
|- Separates Secure World and Normal World external memory spaces for bus masters
| such as processors and DMA-equipped peripherals.
|- Supports 8 fully programmable address regions, initially inactive at reset,
| and one base region, always active, that covers the remaining address space.