On Wed, 28 Jan 2009 10:37:53 +0000, Ralf Baechle <ralf@xxxxxxxxxxxxxx> wrote: > > The Cavium OCTEON port overrides the default memcpy and does use > > prefetch. It was recently merged (2.6.29-rc2). Look at octeon-memcpy.S > > > > I have thought that memcpy could be generated by mm/page.c as copy_page > > and clear_page are. > > No, these two only generate copy_page and clear_page. I and Thiemo were > considering to extend this to a full memcopy however. BTW, this code in memcpy.S (and memcpy-atomic.S) looks weird. #if !defined(CONFIG_DMA_COHERENT) || !defined(CONFIG_DMA_IP27) #undef CONFIG_CPU_HAS_PREFETCH #endif #ifdef CONFIG_MIPS_MALTA #undef CONFIG_CPU_HAS_PREFETCH #endif Are there any configuration which do not undef CONFIG_CPU_HAS_PREFETCH ? ;-) --- Atsushi Nemoto
