Belisko Marek wrote:
> On Fri, Oct 29, 2010 at 11:26 AM, Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
wrote:
> > On 10/29/2010 11:21 AM, Belisko Marek wrote:
> >>>>> do you have a "MEM=32" on your command line?
> >>>>
> >>>> Well I add it but same result:
> >>>
> >>> BTW: It must be "mem=", in lowercase, but you did this.
> >>>
> >>> What I was meant to ask was, if you forget to add the "M" to "32".
> >>> Because with mem=32 you tell Linux just to use 32 bytes of memory.
> >>> Maybe your ATAGs are broken, Linux might not see the whole RAM or any
> >>> if it.
> >>
> >> yes it was typo I forgot put M after 32. Kernel now properly boot :).
> >
> > How much RAM you you have? Adjust mem= accordingly.
>
> Have 64M I will adjust.
>
> >> U-boot somehow
> >> add kernel this parameter? Because for u-boot I don't need to set this
> >> parameter.
> >
> > Nope - u-boot and barebox set up this information in the ATAG list.
> > Seems something is broken with your ATAG list.
>
> Could be a problem thats I load barebox directly to ram and run it and
> then RAM size isn't probed
> and correctly set in atags?
No, you need something like that:
[...]
static struct memory_platform_data ram_pdata = {
.name = "ram0",
.flags = DEVFS_RDWR,
};
struct device_d mini_sdram_dev = {
.id = -1,
.name = "mem",
.map_base = CS6_BASE,
.size = 64 * 1024 * 1024,
.platform_data = &ram_pdata,
};
[...]
static int mini2440_devices_init(void)
{
[...]
register_device(&mini2440_sdram_dev);
[...]
armlinux_add_dram(&mini2440_sdram_dev);
[...]
}
jbe
--
Pengutronix e.K. | Juergen Beisert |
Linux Solutions for Science and Industry | Phone: +49-8766-939 228 |
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