From mboxrd@z Thu Jan 1 00:00:00 1970 From: Aneesh V Date: Tue, 01 Feb 2011 13:56:40 +0530 Subject: [U-Boot] BSS footprint of FAT very high - SPL issues In-Reply-To: References: <4D4798E2.3050500@ti.com> Message-ID: <4D47C3C0.7060806@ti.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Hi Vaibhav, On Tuesday 01 February 2011 12:22 PM, Bedia, Vaibhav wrote: > Hi Aneesh, > > On Tuesday, February 01, 2011 10:54 AM, Aneesh V wrote: >> Dear Wolfgang, >> >> I had been working on creating an MMC SPL for OMAP4. OMAP boards >> typically support booting from the FAT partition of a removable >> SD/MMC card. So, we need to have FAT support in the SPL. But I am >> having some difficulties in adding FAT support to SPL. >> >> BSS footprint of fat.c is very high. It has three buffers each of >> size 64KB. To workaround this problem I have done something like >> below(The way x-loader works around this problem today). >> CONFIG_SYS_SPL_FAT_BUFFER_BASE is in SDRAM.Is this ok? >> > [...] > > I guess you will hit a similar issue with the networking related code is used (I am not sure if SPL uses it). That also requires a decent size of bss. Luckily we don't need networking related code in SPL. > > Is having a config option to specify the location of bss (like CONFIG_SYS_BSS_ADDR) better/acceptable? I would prefer to have rest of the BSS in internal RAM itself. best regards, Aneesh