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AR# 55329

Zynq-7000 AP SoC, Boot Sys - BootROM 128-KB CRC self-check is not supported

Description

BootROM will not perform a full 128-KB CRC self-check of the ROM contents even if the corresponding eFuse bit setting is programmed in the PS.

Solution

Impact: Trivial. If there is a post-production bit failure in the ROM, then the behavior will be undefined instead of shutting down.
Work-around: Insert a DMB or DSB instruction between the write to Strongly Ordered memory region and the LDREX instruction.
Configurations Affected: Systems that use the CPUs.
Device Revision(s) Affected: Refer to (Xilinx Answer 47916) - Zynq-7000 AP SoC Silicon Revision Differences.


Note:
the ROM is tested and screened for manufacturing defects during production.

AR# 55329
Date Created 04/02/2013
Last Updated 05/28/2013
Status Active
Type Design Advisory
Devices
  • XA Zynq-7000
  • Zynq-7000
  • Zynq-7000Q