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Sitara Processors Forum
DMA mode support for nand prefetch/post-write engine
Hi every one,
This is my frist posting ever in any Forum. I am implementing a boot loader for ARM am3517 on a TI Sitara am3517evm board. I have a x-Loader code from TI, shipped with the board that accesses the NAND blocks page by page which is very slow.
I am looking for a complete code that I can compile for accessing the NAND in DMA mode with prefetch and write-posting Engine support.
The code probably includes: dma.h, gpmc.h, nand.h, dma.c, gpmc.c, nand.c
I found some patches from firstname.lastname@example.org
I tried to contact him, but his email address is not working.
Thank you for looking into this posting.
I'll check for some reference code and reply to this thread shortly. UBOOT or the Linux driver may provide the best reference.
PS: Please mark this post as answered via the Verify Answer button below if you think it answers your question. Thanks!
Checkout the UBoot/SPL patches for AM35x:
The recent AM35x SDK (version 05.03 and later) use UBoot/SPL (as does AM37x), and the above patches were the start of using DMA for NAND.
Thanks a lot for the response. I am working with the x-loader to boot the ti board. The last x-loader I installed was "x-load-1.51-psp04.02.00.07" for ti_am3517 evm board. The x-loader runs from the SRAM in am3517 and copies the raw data/program from NAND into the SDRAM. It calls nand_read_block() to read one block of 128KB page by page at the time, whereas a page is 2KB.
This method, however is slow in compare to DMA. I would like the same implementation for x-loader but with support of DMA mode. I would like to have the source code for a newer version of the x-loader.
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