• Linus Walleij's avatar
    ARM: realview: add an DT SMP boot method · 5420b4b1
    Linus Walleij authored
    This adds an SMP boot method for the ARM RealView reference
    designs. We also select HAVE_SMP by default and make it use
    SMP_ON_UP so we only need to support one single kernel across
    the RealView reference designs when using DT.
    
    The RealViews need to have the SCU (Snoop Control Unit)
    activated on boot, and this is now done by looking up its
    address from the device tree and initializing it and counting
    the available cores.
    
    The RealViews boot by using a magic address register in the
    system controller (SYS_FLAGS) to store the boot address,
    the ROM will then read this register to the PC when the CPUs
    are taken out of WFI. This code uses a handle to the syscon
    regmap to access this register.
    Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
    5420b4b1
cpus.txt 10.4 KB