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.