PCI9054中的DMPBAM寄存器的疑惑

DMPBAM: PCI Base Address (Remap) Register for PCI Initiator-to-PCI Memory
DMPBAM[31:16]: Remap Local-to-PCI Space into PCI Address Space. Bits in this register
remap (replace) Local Address bits used in decode as the PCI Address bits.
从上面来看是不是我们一次只能访问本地的64K（offset < 0x0000_FFFF）空间，如果要访问大于64K的空间是不是必须重新设置DMPBAM来做另一个64K空间的映射才行？