On Sat, Jan 09, 2016 at 01:12:33AM +0900, Masahiro Yamada wrote: > Hi Tom, > > > 2016-01-05 4:59 GMT+09:00 Tom Rini <tr...@konsulko.com>: > > On Thu, Dec 17, 2015 at 05:19:35PM +0900, Masahiro Yamada wrote: > > > >> To boot Linux, we should prevent Initramdisk and FDT from going too > >> high. > > > > OK, why? I could be entirely wrong here but I had thought for some > > reason that if the ramdisk was in "highmem" the kernel would relocate > > contents (or if compressed, uncompress to a non-highmem location). The > > FDT must be in lowmem as that tells the kernel where memory even is. Is > > this not the case? Thanks! > > > Just in case, I asked this in the kernel ML. > > > See this thread: > https://lkml.org/lkml/2016/1/8/169 > > > Jon gave me the answer. > > > > 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.
Which explains why I picked the regions I picked for ti_armv7_common.h that I did. So, OK, thanks! I'll apply this patch shortly. -- Tom
signature.asc
Description: Digital signature
_______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot