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BASEPTR0 and BASEPTR1 together provide an initial system address for the first component in the system. Typically, this is the address of a top-level ROM table that indicates where APv2 APs are located. The size of the address is defined in DPIDR1.ASIZE, which defines the size of the whole address even though bits [11:0] are always zero, as the minimum address space for each component is 4KB.
The BASEPTR0 register characteristics are:
The following figure shows the bit assignments.
The following table shows the bit assignments.
Table 9-5 BASEPTR0 register bit assignments
Base address bits [31:12] of first component in the system. The address is aligned to a 4KB boundary. Depends on the interface tie-off value of baseaddr.
Indicates whether the base address is valid. Depends on the interface tie-off value of baseaddr_valid.