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.