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. -- Best Regards Masahiro Yamada _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
