[PATCH 5/9] ps3: Preallocate bootmem memory for ps3fb

Arnd Bergmann arnd at arndb.de
Tue Jan 30 21:44:41 EST 2007


On Tuesday 30 January 2007 10:08, Benjamin Herrenschmidt wrote:
> 
> > I'm afraid that assumption is usually false, as you only need to access the
> > FLASH when you want to change boot flags or update the boot loader.
> 
> At the same time, flash doesn't have to be fast... can't we use a
> smaller bounce buffer (a page) and divide the transfer ?

No, the problem is that the flash interface only supports an hcall
for 'erase+write', but not separately, so the writes need to do
in erase block size, even if the physical medium can probably
handle smaller writes after a block was erased.

	Arnd <><



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