Hi Andreas, I thought of it too. I thought it was dtb all along. But all changed was below line, without even touching the dtb. I just replaced the uboot and I started to see 1G SDRAM. Thats why I got confused.
From: Andreas Färber <afaer...@suse.de> To: Naitik Amin <naitik.a...@ametek.com>, u-boot@lists.denx.de, Date: 06/05/2015 06:36 PM Subject: Re: [U-Boot] SDRAM 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 Nürnberg, Germany GF: Felix Imendörffer, Jane Smithard, Dilip Upmanyu, Graham Norton; HRB 21284 (AG Nürnberg) _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
