From: "Andreas Färber" <afaerber@suse.de>
To: u-boot@lists.denx.de
Subject: [U-Boot] SDRAM
Date: Sat, 06 Jun 2015 07:36:03 +0900 [thread overview]
Message-ID: <55722453.3010007@suse.de> (raw)
In-Reply-To: <OF206C0BB2.AEA8211E-ON85257E53.00510251-85257E53.005167B5@LocalDomain>
Hi,
Am 28.05.2015 um 23:49 schrieb Naitik Amin:
> I am using Altera SOC, under my includes, I have a file called
> /include/configs/socfpga_common.h
>
> In this file, I have #define as below.
> #define PHYS_SDRAM_1_SIZE 0x20000000
>
> If this #define is set to 0x20000000, and uboot is compiled and loaded,
> the system when boots up into Linux, issuing free command under linux
> shows 512 MB. Which is *correct*. If I change that #define to 0x40000000,
> upon executing free command, linux shows 1G.
>
> My questions, is how does this info from uboot reach kernel ?
That will depend on your boot environment. :) The new mechanism would be
the Device Tree node /memory, if you are passing a .dtb file to
bootm/bootz. The legacy mechanism is so-called atags.
HTH,
Andreas
--
SUSE Linux GmbH, Maxfeldstr. 5, 90409 N?rnberg, Germany
GF: Felix Imend?rffer, Jane Smithard, Dilip Upmanyu, Graham Norton; HRB
21284 (AG N?rnberg)
next prev parent reply other threads:[~2015-06-05 22:36 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-28 14:49 [U-Boot] SDRAM Naitik Amin
2015-06-05 22:36 ` Andreas Färber [this message]
2015-06-23 3:51 ` Naitik Amin
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