From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from vega.surpasshosting.com ([72.29.83.9]) by bombadil.infradead.org with esmtps (Exim 4.69 #1 (Red Hat Linux)) id 1N0suw-0002Za-CE for linux-mtd@lists.infradead.org; Thu, 22 Oct 2009 08:21:10 +0000 Message-ID: <4AE015DD.1010009@embedded-sol.com> Date: Thu, 22 Oct 2009 10:20:45 +0200 From: Felix Radensky MIME-Version: 1.0 To: Scott Wood Subject: Re: UBIFS problem on MPC8536DS References: <4AD5ADC9.30503@embedded-sol.com> <4AD5C5B4.3060303@nokia.com> <4AD5D053.9000901@embedded-sol.com> <4AD5FFE7.7080703@nokia.com> <4AD60EF4.4080306@embedded-sol.com> <4AD614E4.6030005@freescale.com> <4AD7811A.6040501@freescale.com> <4AD7FE37.1060705@embedded-sol.com> <20091016153128.GA11838@loki.buserror.net> In-Reply-To: <20091016153128.GA11838@loki.buserror.net> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: "linuxppc-dev@ozlabs.org" , "linux-mtd@lists.infradead.org" List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Hi, Scott Scott Wood wrote: > On Fri, Oct 16, 2009 at 07:01:43AM +0200, Felix Radensky wrote: > >> Thanks for confirmation. So the real problem is eLBC ? >> What happens if I access other devices on eLBC (e.g. FPGA) >> simultaneously with NAND or NOR ? >> > > AFAICT, the problem is NAND being accessed simultaneously with anything else > on the eLBC (at least GPCM -- not sure about UPM). Instead of delaying the > memory-like transaction until the NAND special operation has completed, it > seems to just abort the NAND operation. > > eLBC can't really tell the difference whether you've got NOR or FPGA hooked > up to a GPCM chip select, so the problem should still apply. > Are you aware of Freescale plans to fix the problem in new silicon revisions ? Also, can you please tell what CPUs are affected by this, except 8536 and 8572. Thanks a lot. Felix.