4.4 Cache Algorithms
Store hits to a Shared block result in a processor upgrade request. This indicates to external agents containing caches that the block must be invalidated.
There is no difference between an uncached accelerated load and an uncached load. Only word or doubleword stores can take advantage of this mode.
Stores under the Uncached accelerated cache algorithm bypass the primary and secondary caches. Stores to identical or sequential addresses are gathered in the uncached buffer, described in Chapter 6, the section titled "Uncached Buffer."
Completely gathered uncached accelerated blocks are issued to the System interface as processor block write requests. Incompletely gathered uncached accelerated blocks are issued to the System interface using processor double/single-word write requests; this is also described in Chapter 6, the section titled "Uncached Buffer."