• Roberto Vargas's avatar
    ARM platforms: Demonstrate mem_protect from el3_runtime · 638b034c
    Roberto Vargas authored
    
    
    Previously mem_protect used to be only supported from BL2. This is not
    helpful in the case when ARM TF-A BL2 is not used. This patch demonstrates
    mem_protect from el3_runtime firmware on ARM Platforms specifically
    when RESET_TO_BL31 or RESET_TO_SP_MIN flag is set as BL2 may be absent
    in these cases. The Non secure DRAM is dynamically mapped into EL3 mmap
    tables temporarily and then the protected regions are then cleared. This
    avoids the need to map the non secure DRAM permanently to BL31/sp_min.
    
    The stack size is also increased, because DYNAMIC_XLAT_TABLES require
    a bigger stack.
    
    Change-Id: Ia44c594192ed5c5adc596c0cff2c7cc18c001fde
    Signed-off-by: default avatarRoberto Vargas <roberto.vargas@arm.com>
    638b034c
platform_def.h 5 KB