From mboxrd@z Thu Jan 1 00:00:00 1970 From: Scott Wood Date: Tue, 01 Mar 2016 09:54:29 -0600 Subject: [U-Boot] [PATCH 2/2] boards: ls2080: Disable fdt copying by default In-Reply-To: References: <1456790301-28685-1-git-send-email-york.sun@nxp.com> <1456790301-28685-2-git-send-email-york.sun@nxp.com> ,<1456790427.5360.62.camel@buserror.net> <1456796562.5360.63.camel@buserror.net> Message-ID: <1456847669.5360.66.camel@buserror.net> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de On Tue, 2016-03-01 at 03:55 +0000, Prabhakar Kushwaha wrote: > > -----Original Message----- > > From: Scott Wood [mailto:oss at buserror.net] > > Sent: Tuesday, March 01, 2016 7:13 AM > > To: york sun ; U-Boot Mailing List > boot at lists.denx.de> > > Cc: Prabhakar Kushwaha > > Subject: Re: [U-Boot] [PATCH 2/2] boards: ls2080: Disable fdt copying by > > default > > > > On Tue, 2016-03-01 at 00:08 +0000, york sun wrote: > > > Sorry for top posting. I am on outlook web access. > > > > > > There may be some limitation on fdt relocation. Without setting > > > fdt_high, u -boot relocates the device tree toward the end of useable > > > memory. I haven't got a chance to debug why it doesn't work. > > > > > > This patch is to disable the relocation by default. A magic number > > > 0xa0000000 doesn't make much sense here. > > > > I agree, if the number is arbitrary. But if Linux has a limitation, as it > > does on > > arm32, then it should be expressed here. > > > > Just for understanding purpose. > u-boot in case of arm32 can only access memory in 32 bit range. > Will there be possibility of u-boot copying dtb in any memory not > accessible to core. No, but that is not the only limitation that needs to be honored regarding device tree and initrd placement. -Scott