On Mon, Sep 02, 2013 at 12:24:06PM +0200, Jean-Christophe PLAGNIOL-VILLARD wrote: > On 11:05 Mon 02 Sep , Sascha Hauer wrote: > > On Sat, Aug 31, 2013 at 05:54:22PM +0200, Jean-Christophe PLAGNIOL-VILLARD wrote: > > > For high vectors if memory start at 0x0. We have to > > > live without being able to catch NULL pointer dereferences. > > > > > Why not add the check to vectors_init() instead of passing this as > > argument? > > > > I must say I'm not entirely happy with this approach. Being able to > > catch NULL pointer derefs is really a good thing. When exactly does the > > faulting zero SDRAM page become a problem for you? obviously something > > like > > > > cp /somehing /dev/ram0 > > > > does not work. Some care must probably be taken when setting up the > > kernel parameters. Are these the problems or is there something else? > yes it's get issue with uImage that get data load there :( > > as I can not control the load addr from uImage :( > > and on ux5x0 and arm board I have ddr starting at 0x0 Maybe we should add some hook which dynamically enables/disables the zero page. The bootm code could then disable it. Anyway, for now we can also apply the current patch, but please move the is_start_zero test to vectors_init(). Sascha -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
