Cache On and ECC clear

[Eric W. Biederman]

Li-Ta Lo <ollie at lanl.gov> writes:

> On Fri, 2004-03-26 at 01:06, Eric W. Biederman wrote:
> > Li-Ta Lo <ollie at lanl.gov> writes:
> > 
> > > Eric,
> > > 
> > > I tried to call cache_on() first than the cpufixeup()
> > > in cpu.c to fix the "slow ecc clear" problem. It still
> > > works that way. Is there any reason we can't do this ?
> > 
> > Hmm.  I don't see this.  I have the cache on and things
> > clear quite quickly.  I may have a slightly different calling
> > order then the standard tree.  
> > 
> > Ollie can you compare what is checked into the tree with 
> > the last release I did for Lightning?  It works there...
> > 
> 
> BTW, why are you using inline asm to clearing the memory ?

Mostly it was just a copy from the romcc code.  And I have
a little distrust of compilers when I want a tight loop.

> Isn't it just one line in C to clear the memory ? Why not use
> string instruction instead of mov ?

A string mov instruction is slower.

Eric