On Mon, Aug 05, 2013 at 02:50:59PM -0500, Dennis Gilmore wrote: > On Mon, 05 Aug 2013 12:39:03 -0600 > Stephen Warren <swar...@wwwdotorg.org> wrote: > > > On 08/03/2013 01:11 AM, Dennis Gilmore wrote: [snip] > > > when it comes to memory addressing a distro and user shouldn't need > > > to know anything. Ideally u-boot will auto allocate addresses based > > > on the size of loaded objects. starting with a base address > > > internal to u-boot you load a kernel, when loading an initramfs > > > u-boot automatically calculates an address that ensures it does not > > > overlap with the kernel. same for a fdt if loaded. I say auto > > > calculated because what we think today will be enough room may not > > > be tomorrow, dynamically calculating gives the flexibility for > > > whatever may come. > > > > The way I've approached this for Tegra is to have the default > > environment define certain standard environment variables that U-Boot > > scripts can use, without a care. For example, the kernel should be > > loaded at ${kernel_addr_r}, initrd at ${ramdisk_addr_r}, DTB at > > ${fdt_addr_r}, etc. > I really don't want to need to deal with variable names either. I > really want to just say load a kernel initramfs and here is some > arguments and have the rest just work.
Note that the pxe menu parsing code in turn relies on ${kernel_addr_r} and ${ramdisk_addr_r} (and ${bootargs}) to know where to place what's requested. -- Tom
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