On Fri, Sep 10, 2010 at 03:42:32PM -0700, Ira W. Snyder wrote: > Newer Linux kernels can overrun the initial memory window used for > booting with their BSS area. When this happens, they overwrite the FDT > and silently fail to boot. > > On e300 CPUs, the Linux kernel uses an initial BAT covering the first > 256MB of RAM. See arch/powerpc/kernel/head_32.S for details. Increase > the value of CONFIG_SYS_BOOTMAPSZ to accommodate the maximum value > allowed by Linux. This will allow very large kernels to boot. > > Signed-off-by: Ira W. Snyder <i...@ovro.caltech.edu> > --- > > Wolfgang, > > I did both mpc83xx and mpc51xx (CONFIG_E300) at the same time. There > were fewer boards than I expected. A quick read through head_fsl_booke.S > shows that CONFIG_E500 could be increased to 64MB. I'll leave that to > that arch's maintainer. They have already increased theirs to 16MB, > after finding this problem. > > This patch doesn't attempt to add support for actually loading a kernel > larger than 8MB uncompressed (code + data, but not bss). That would mean > adding #define CONFIG_SYS_BOOTM_LEN SOME_VALUE_GREATER_THAN_8MB. > > This boots up fine on my MPC8349EMDS. >
Sorry about forgetting to CC maintainers before. I've added the 83xx and 5xxx maintainers, Kim and Wolfgang respectively. Is there anything I should do to help this patch into mainline. I haven't heard anything for about a week. Thanks, Ira _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
