When setting the following parameters for
PCIe®
address mapping,
C_PCIEBAR2AXIBAR_n and PF0_BARn_APERTURE_SIZE, be
sure these are set to allow for the addressing space on the AXI system. For example, the
following setting is illegal and results in an invalid AXI address.
C_PCIEBAR2AXIBAR_n=0x00000000_FFFFF000
PF0_BARn_APERTURE_SIZE=0x06 (8 KB)For an 8 Kilobyte BAR, the lower 13 bits must be zero. As a result, the C_PCIEBAR2AXIBAR_n value should be modified to be 0x00000000_FFFFE0000. Also, check for a larger value on
PF0_BARn_APERTURE_SIZE compared to the value
assigned to the C_PCIEBAR2AXIBAR_n parameter. And
example parameter setting follows.
C_PCIEBAR2AXIBAR_n=0xFFFF_E000
PF0_BARn_APERTURE_SIZE=0x0D (1 MB)To keep the AXIBAR upper address bits as 0xFFFF_E000 (to reference bits [31:13]), the PF0_BARn_APERTURE_SIZE parameter must be set to 0x06 (8
KB).