On Wed, Aug 6, 2008 at 8:07 AM, Kumar Gala <[EMAIL PROTECTED]> wrote: > > On Aug 6, 2008, at 1:02 AM, Grant Likely wrote: > >> From: Grant Likely <[EMAIL PROTECTED]> >> >> ioremap_bat() is useful for things like mapping SoC internally memory >> mapped >> register and early text because it allows mappings to devices to be setup >> early in the boot process where they are needed, and the mappings persist >> after the MMU is configured. >> >> Without ioremap_bat(), setting up the MMU would cause the early text >> mappings to get lost and mostly likely result in a kernel panic on the >> next >> attempt at output. >> >> Signed-off-by: Grant Likely <[EMAIL PROTECTED]> >> --- > > why can't we just do this in ioremap itself?
I suppose we could; but the usecase is somewhat different and I wanted to keep it simple. Using a separate API also helps reenforce that the caller really needs to know what they are doing because BATs are a limited resource. g. -- Grant Likely, B.Sc., P.Eng. Secret Lab Technologies Ltd. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
