Address boundary

[rodrigomelo9]

AHB

The minimum address space that can be allocated to a single Subordinate is 1KB, and the start and the end of the
address region must exist on a 1KB boundary. All Managers are designed so that they do not perform incrementing
transfers over a 1KB address boundary. This ensures that a burst never crosses an address decode boundary.

AXI

The maximum size of a transaction is 4KB and transactions are not permitted to cross a 4KB boundary. However,
many Managers generate transactions which are guaranteed to be smaller than this.
A Subordinate or interconnect might benefit from this information. For example, a Subordinate might be able to
optimize away some decode logic. An interconnect striping at a granule smaller than 4KB might be able to avoid
burst splitting if it knows that transactions will not cross the stripe boundary.

[rodrigomelo9]

A burst must not cross a 4KB address boundary.

Note This prohibition prevents a burst from crossing a boundary between two Subordinates. It also limits the number of
address increments that a Subordinate must support.