How can I support 2GB of memory in Linux kernel on 440SPe

[Vincitore]

Hi Michele,

I also tried this and it did not work. It also panics while unpacking rootfs

Onced your system is up do you see all of the 2GB of Memory.

# cat /proc/meminfo

Thank You,

Vincitore


On 12/28/07, Michele Pallaro <michele.pallaro at alcatel-lucent.it> wrote:
> CONFIG_ADVANCED_OPTIONS=y
> # CONFIG_HIGHMEM_START_BOOL is not set
> CONFIG_HIGHMEM_START=0xfe000000
> # CONFIG_LOWMEM_SIZE_BOOL is not set
> CONFIG_LOWMEM_SIZE=0x30000000
> CONFIG_KERNEL_START_BOOL=y
> CONFIG_KERNEL_START=0x80000000
> # CONFIG_TASK_SIZE_BOOL is not set
> CONFIG_TASK_SIZE=0x80000000
>
> I use ppc 8555E with 2G
>
> Michele
>
>
> Vincitore wrote:
> > Hi,
> >
> > I need to support 2GB of memory on a custom 440SPe board.
> >
> > I see to support 1GB of memory on the 440SPe yucca board the following
> > configuration changes were done.
> >
> > #
> > # Advanced setup
> > #
> >
> > CONFIG_ADVANCED_OPTIONS=y
> > CONFIG_HIGHMEM_START=0xfe000000
> > CONFIG_LOWMEM_SIZE_BOOL=y
> > CONFIG_LOWMEM_SIZE=0x40000000
> > CONFIG_KERNEL_START_BOOL=y
> > CONFIG_KERNEL_START=0xa0000000
> > # CONFIG_TASK_SIZE_BOOL is not set
> > CONFIG_TASK_SIZE=0x80000000
> > # CONFIG_CONSISTENT_START_BOOL is not set CONFIG_CONSISTENT_START=0xff100000
> > # CONFIG_CONSISTENT_SIZE_BOOL is not set
> > CONFIG_CONSISTENT_SIZE=0x00200000 # CONFIG_BOOT_LOAD_BOOL is not set
> > CONFIG_BOOT_LOAD=0x01000000
> >
> > It looks like the only thing I would need to do is modify the
> > following for 2GB support.
> >
> > CONFIG_LOWMEM_SIZE=0x80000000
> > and
> > CONFIG_KERNEL_START=0x60000000
> >
> > But this does not work. It almost does, but right after I get to the
> > Linux prompt, this system panics. If I scale back to one 1GB
> > everything works great.
> >
> > Any ideas?
> >
> > Thank You,
> >
> > Vincitore
> > _______________________________________________
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> > Linuxppc-embedded at ozlabs.org
> > https://ozlabs.org/mailman/listinfo/linuxppc-embedded
> >
>
>