From mboxrd@z Thu Jan 1 00:00:00 1970 From: tixy@linaro.org (Jon Medhurst (Tixy)) Date: Fri, 08 Jan 2016 10:22:24 +0000 Subject: [Question] Any restriction for the location of initramdisk? In-Reply-To: References: Message-ID: <1452248544.3006.2.camel@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Fri, 2016-01-08 at 16:16 +0900, Masahiro Yamada wrote: > Hi. > > > I know DTB should be located within the reach of the kernel > so that the kernel can get access to it at the early boot stage. > In other words, DTB should be put in the low memory area. > > Does initramdisk has the similar restriction? I assume so, as that's what Documentation/arm/Booting says ... 5. Load initramfs. ------------------ Existing boot loaders: OPTIONAL New boot loaders: OPTIONAL If an initramfs is in use then, as with the dtb, it must be placed in a region of memory where the kernel decompressor will not overwrite it while also with the region which will be covered by the kernel's low-memory mapping. A safe location is just above the device tree blob which itself will be loaded just above the 128MiB boundary from the start of RAM as recommended above. -- Tixy