> -----Original Message----- > From: Mark Jackson [mailto:mpfj-l...@newflow.co.uk] > Sent: Monday, June 17, 2013 11:10 AM > To: Stefan Roese > Cc: Rini, Tom; Kipisz, Steven; u-boot@lists.denx.de > Subject: Re: [U-Boot] [PATCH v2 7/7] am335x_evm: Add support to boot > from NOR. > > On 17/06/13 17:01, Stefan Roese wrote: > > Hi Mark, > > > > On 17.06.2013 17:23, Mark Jackson wrote: > > <snip> > > >> One question ... the SPL code has:- > >> > >> ... > >> gd = &gdata; > >> ... > >> > >> But there seems to be no similar assignment when in NOR boot mode. > >> I'm no expert in the internal workings of u-boot, so I thought I'd > >> check, just in case !?! > > > > I just noticed you mentioning "gd" here and wanted to point you to a > > patch that fixed a gd-related boot issue for me on OMAP3: > > > > [U-Boot] [PATCH 1/3] arm: spl: Fix SPL booting for OMAP3 > > > > (sorry, I can't find a link to this patch right now and I'm in a > > hurry) > > > > Not sure if this has something to do with your problem (I don't have > > the time to dig into this mail thread today as I'm leaving right now). > > I'll look at that thanks. > > But I've taken a slightly different approach, and added the following to the > start of s_init() ... > > > > void s_init(void) > { > unsigned short *p = (unsigned short*)0x08000000; > while (1) > { > int i; > for (i = 0; i < (1 * 1024); i++) > { > unsigned short d = p[i]; > d++; > *p = d; > } > } > ... > > AFAICT, that should just spin on reading/writing the NOR device, but I still > get > only an initial 350us burst on the CS0 line, and then nothing. > > So I can only assume that the boot code isn't getting as far as > s_init() at all !! > > In start.S and low_levelinit.c, there are various uses of:- > > #ifdef CONFIG_SPL_BUILD > > Do any of these also need referencing with a CONFIG_NOR_BOOT ? > > Mark J.
Do you have a u-boot.lds in board/ti/am335x? That should put s_init() earlier in the boot. Also, include/configs/am335x_evm.h should have /* Custom script for NOR */ #define CONFIG_SYS_LDSCRIPT "board/ti/am335x/u-boot.lds" Before using JTAG, take a look in System.map where s_init is located. For a multiplex NOR it should be in the first 64K of address space. Steve K. _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
