1.. _build_options_arm_fvp_platform: 2 3Arm FVP Platform Specific Build Options 4--------------------------------------- 5 6- ``FVP_CLUSTER_COUNT`` : Configures the cluster count to be used to 7 build the topology tree within TF-A. By default TF-A is configured for dual 8 cluster topology and this option can be used to override the default value. 9 10- ``FVP_INTERCONNECT_DRIVER``: Selects the interconnect driver to be built. The 11 default interconnect driver depends on the value of ``FVP_CLUSTER_COUNT`` as 12 explained in the options below: 13 14 - ``FVP_CCI`` : The CCI driver is selected. This is the default 15 if 0 < ``FVP_CLUSTER_COUNT`` <= 2. 16 - ``FVP_CCN`` : The CCN driver is selected. This is the default 17 if ``FVP_CLUSTER_COUNT`` > 2. 18 19- ``FVP_MAX_CPUS_PER_CLUSTER``: Sets the maximum number of CPUs implemented in 20 a single cluster. This option defaults to 4. 21 22- ``FVP_MAX_PE_PER_CPU``: Sets the maximum number of PEs implemented on any CPU 23 in the system. This option defaults to 1. Note that the build option 24 ``ARM_PLAT_MT`` doesn't have any effect on FVP platforms. 25 26- ``FVP_USE_GIC_DRIVER`` : Selects the GIC driver to be built. Options: 27 28 - ``FVP_GICV2`` : The GICv2 only driver is selected 29 - ``FVP_GICV3`` : The GICv3 only driver is selected (default option) 30 - ``FVP_GICV5`` : The GICv5 only driver is selected 31 32- ``FVP_HW_CONFIG_DTS`` : Specify the path to the DTS file to be compiled 33 to DTB and packaged in FIP as the HW_CONFIG. See :ref:`Firmware Design` for 34 details on HW_CONFIG. By default, this is initialized to a sensible DTS 35 file in ``fdts/`` folder depending on other build options. But some cases, 36 like shifted affinity format for MPIDR, cannot be detected at build time 37 and this option is needed to specify the appropriate DTS file. 38 39- ``FVP_HW_CONFIG`` : Specify the path to the HW_CONFIG blob to be packaged in 40 FIP. See :ref:`Firmware Design` for details on HW_CONFIG. This option is 41 similar to the ``FVP_HW_CONFIG_DTS`` option, but it directly specifies the 42 HW_CONFIG blob instead of the DTS file. This option is useful to override 43 the default HW_CONFIG selected by the build system. 44 45- ``FVP_GICR_REGION_PROTECTION``: Mark the redistributor pages of 46 inactive/fused CPU cores as read-only. The default value of this option 47 is ``0``, which means the redistributor pages of all CPU cores are marked 48 as read and write. 49 50- ``INITRD_SIZE`` : Enable the insertion of initrd properties to the device 51 tree blob at build time. Takes an initrd size value in hex format 52 53- ``INITRD_PATH`` : Enable the insertion of initrd properties to the device tree 54 blob at build time. Takes a path to an initrd file. Can be used as an 55 alternative to ``INITRD_SIZE``. ``INITRD_SIZE`` takes precedence over 56 ``INITRD_PATH`` if both values are provided. 57 58- ``INITRD_BASE`` : Provide the preloaded initrd base address in memory (hex format). 59 60-------------- 61 62*Copyright (c) 2019-2025, Arm Limited. All rights reserved.* 63