From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michal Simek Date: Tue, 28 Jan 2014 15:23:23 +0100 Subject: [U-Boot] u-boot spl with fat32 on arm Message-ID: <52E7BD5B.8020702@monstr.eu> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Hi guys, I do play a little bit with u-boot spl and I am curious about fat32 implementation. There is MAX_CLUSTSIZE which is 65k and there are 3 buffers in fat.c code do_fat_read_at_block get_contents_vfatname_block get_dentfromdir_block All these 3 are placed to bss section. I have just 192k of memory for SPL that's why I tried 2 things 1. Place these 3 fat arrays to different memory which is working fine 2. Decrease MAX_CLUSTSIZE to any low value (I do use 8k). Unfortunately if I decrease MAX_CLUSTSIZE and add them to bss section SPL doesn't work. If I add them to a different section in front of or behind bss everything is just fine. That's why I have a question where can be the problem in this behaviour that keeping 8k MAX_CLUSTSIZE in bss section doesn't work and keeping 8k MAX_CLUSTSIZE out of bss section works. bss relocation is not done in SPL. Maybe someone could know where the problem can be before I look at ASM code. Thanks for your hints, Michal -- Michal Simek, Ing. (M.Eng), OpenPGP -> KeyID: FE3D1F91 w: www.monstr.eu p: +42-0-721842854 Maintainer of Linux kernel - Microblaze cpu - http://www.monstr.eu/fdt/ Maintainer of Linux kernel - Xilinx Zynq ARM architecture Microblaze U-BOOT custodian and responsible for u-boot arm zynq platform -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 263 bytes Desc: OpenPGP digital signature URL: