[parisc-linux] Prefetch macros for PA-RISC

[Jim Hull]

Matthew, you wrote:

> on PA, we have prefetch for read and prefetch for write.  They're encoded
> as loads to the 0 register.  prefetch read is ldd (load 64-bit quantity)
> and prefetch-write is ldw (load 32-bit quantity).

Actually, Table 6-10 in the PA-RISC 2.0 book is wrong -- LDW is prefetch
for read, LDD is prefetch for write.  See this erratum description:

http://devresource.hp.com/devresource/Docs/Refs/PA2_0/updates/e1.html

 -- Jim