From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tom Rini Date: Fri, 28 Mar 2014 12:25:22 -0400 Subject: [U-Boot] [PATCH 1/6] add README.distro file In-Reply-To: <53359F28.5000400@wwwdotorg.org> References: <1392659798-1665-1-git-send-email-dennis@ausil.us> <1395353581-5839-1-git-send-email-dennis@ausil.us> <1395353581-5839-2-git-send-email-dennis@ausil.us> <5331E5EE.1040906@wwwdotorg.org> <20140328154222.GN16360@bill-the-cat> <53359F28.5000400@wwwdotorg.org> Message-ID: <20140328162522.GR16360@bill-the-cat> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de On Fri, Mar 28, 2014 at 10:11:20AM -0600, Stephen Warren wrote: > On 03/28/2014 09:42 AM, Tom Rini wrote: > > On Tue, Mar 25, 2014 at 02:24:14PM -0600, Stephen Warren wrote: > >> On 03/20/2014 04:12 PM, Dennis Gilmore wrote: > > [snip] > >>> +You should not set initrd_high and fdt_high to 0xffffffff as the user should > >>> +not need to edit the memory locations having the initramfs and dtb being > >>> +relocatable is best to ensure the system will boot in all situations. > >> > >> Perhaps CONFIG_SYS_BOOTMAPSZ is worth a mention too. The commit > >> description for 7f1b767aea94 "ARM: tegra: define CONFIG_SYS_BOOTMAPSZ" > >> might be useful when writing this part of the document. > > > > I would swear (and I just dug up the notes from the last time I was > > looking at this) that no, CONFIG_SYS_BOOTMAPSZ is not sufficient because > > it doesn't cover the ramdisk case, which is important for generic > > distro, unless you also add in initrd_high=top-of-lowmem-value or know > > it'll be in an always-good spot and set it to 0xffffffff. > > Isn't that a bug? In other words, shouldn't CONFIG_SYS_BOOTMAPSZ affect > a ramdisk too? No, because it's a per-arch thing on if you can have a ramdisk in high memory or not (and then the kernel deals with it), iirc. I _think_ this is one of those cases where ARM is much more strict about things than other architectures, but I lack the easy access to other platforms that I used to have. -- Tom -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 836 bytes Desc: Digital signature URL: