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  • York Sun's avatar
    Reserve secure memory · e8149522
    York Sun authored
    
    
    Secure memory is at the end of memory, separated and reserved
    from OS, tracked by gd->secure_ram. Secure memory can host
    MMU tables, security monitor, etc. This is different from PRAM
    used to reserve private memory. PRAM offers memory at the top
    of u-boot memory, not necessarily the real end of memory for
    systems with very large DDR. Using the end of memory simplifies
    MMU setup and avoid memory fragmentation.
    
    "bdinfo" command shows gd->secure_ram value if this memory is
    marked as secured.
    
    Signed-off-by: default avatarYork Sun <yorksun@freescale.com>
    e8149522