On Wed, Mar 12, 2014 at 11:51:41PM +0100, Michael Walle wrote: > Hi Tom, > > Am 2014-03-12 22:32, schrieb Tom Rini: > >On Wed, Mar 12, 2014 at 07:42:54PM +0100, Michael Walle wrote: > > > >>Move addresses for kernel, ramdisk and fdt blob to own > >>variables. Add dtb > >>blob loading to all existing boot scripts, dtb filenames were > >>taken from > >>vanilla kernel. Introduce new boot script bootcmd_legacy, which > >>only loads > >>a kernel and a ramdisk. Make this the default boot script. This > >>should also > >>restore the behaviour of the original bootloader. > > > >How much memory do these platforms have? > > LS-CHLv2 has 64MB and LS-XHL has 256MB. The kernel_addr and > ramdisk_addr are the value which was also used in the original > bootloader.
OK, so we don't have to worry about relocation to bad places... > >Having just spent a bunch of > >time issues about where to load what on TI platforms, I'm a little > >worried about some of the locations: > > > >>+ "kernel_addr=0x00100000\0" \ > > > >Below 32MB which isn't optimal. > > why is that? iirc the kernel is unpacked to 0x8000, isn't it? ok > there might be some problems unpacking the kernel. Documentation/arm/Booting in the kernel suggests above 32MB to avoid relocation. > >>+ "ramdisk_addr=0x00800000\0" \ > >>+ "fdt_addr=0x007f0000\0" \ > > > >This doesn't leave a whole lot of space for the kernel before > >overwriting either of these. > > I must admit i've never worried about where to put these. Any > suggestions? initrd at the end of the ram? although i'd like to keep > both platforms the same, eg. i'd take 64MB as the end of ram. Well, I guess it comes down to how much you worry about things like Fedora or SuSE running on the system. I'd suggest moving the above to 32MB/just below 32MB to allow a fairly bigish kernel to still work as that's one of the thing that will bite commodity distro kernels. -- Tom
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