Am 09.05.2013 14:59, schrieb Sricharan R: > On Wednesday 08 May 2013 06:54 PM, An Schall wrote: >> Hi there, >> >> my task is to output the uninitialized SDRAM values over UART during device >> startup. >> >> Therefore, I first searched for the code that handles the SDRAM >> initialization since I have to put my code in front of it. After digging >> through the code and reading some mailing list entries, I guess it takes >> place either in: >> >> arch/arm/cpu/armv7/start.S: after line 159 (after CPU was set to SVC3232 >> mode) >> >> or >> >> arch/arm/cpu/armv7/omap-common/lowlevel_init.S (which is quiet confusing to >> me). >> >> I guess it takes place in start.S. If you could confirm this, it would be >> very helpful.ti >> >> Next, I need to configure UART so I can iterate over the SDRAM and put each >> single byte on UART. >> >> Do you have any information where I can find info on how to write ASM to >> configure UART? ARM helpcenter is way too huge to find info in reasonable >> time. >> >> Thanks in advance, >> André >> >> >> >> _______________________________________________ >> U-Boot mailing list >> U-Boot@lists.denx.de >> http://lists.denx.de/mailman/listinfo/u-boot > If your task is print the the uninitialised EMIF registers, then just > add prints before the function sdram_init() in s_init > > arch/arm/cpu/armv7/omap-common/hwinit-common.c > > Regards, > Sricharan > Hi,
I have to get values of any *ram source. Currently I see the following options: 1. The best solution would be to somehow read the whole SRAM of the pandaboar (the development board I am experimenting with) 2. The memories in the subsystems (A9, DSP, M3-subsystem, ABE, IVA-HD) 3. SAR RAM 4. L3 OCM RAM The EMIF registers are one possible choice. I am a little bit confused reading the TRM. It states [1] size of EMIF1 and EMIF2 is 16 MB. However, the documented registers are only 0xE8 bytes in size. What are the residual bytes (64MB-0xE8?). Is there a possibility to also address the other sources of SRAM, mentioned above? Thanks in advance. André [1] - http://makelinux.net/lib/ti/OMAP4460/doc-3397
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