1. 29 Sep, 2020 1 commit
    • Andre Przywara's avatar
      drivers: arm: gicv3: Allow detecting number of cores · 79d89e3d
      Andre Przywara authored
      
      
      A GICv3 interrupt controller will be instantiated for a certain number
      of cores. This will result in the respective number of GICR frames. The
      last frame will have the "Last" bit set in its GICR_TYPER register.
      
      For platforms with a topology unknown at build time (the Arm FPGAs, for
      instance), we need to learn the number of used cores at runtime, to size
      the GICR region in the devicetree accordingly.
      
      Add a generic function that iterates over all GICR frames until it
      encounters one with the "Last" bit set. It returns the number of cores
      the GICv3 has been configured for.
      
      Change-Id: I79f033c50dfc1c275aba7122725868811abcc4f8
      Signed-off-by: default avatarAndre Przywara <andre.przywara@arm.com>
      79d89e3d
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