Hi Marek, Thanks for the swift reply and for the useful references/links. On Tue, May 07, 2019 at 03:23:12PM +0200, Marek Vasut wrote: > On 5/7/19 12:41 PM, Eugeniu Rosca wrote: > > Dear Marek, dear Kieran, > > Hi, > > [...] > > > 1.c Use OpenOCD > > + Presumably same advantages as using a Lauterbach > > + Based on Kieran's https://github.com/kbingham/renesas-jtag > > and on Adam's https://github.com/ntfreak/openocd/commit/1afec4f561392 > > the solution is currently in use. > > ? Any ideas on the model/price of the JTAG adapter? > > Any FT2232H (the H is important, due to MPSSE) works. > I like Flyswatter2 from TinCanTools. > > > ? Not tested. Any patches needed on top of vanilla OpenOCD? > > http://openocd.zylin.com/5149 and related ones, it adds RPC HF support. > However, there are two problems with this: > 1) Even with buffered write, the programming is slow > - This could be improved by running code on one of the Gen3 CPUs > instead of whacking registers via JTAG adapter. I believe that's > what lauterbach and everyone else does too. The data upload to > SRAM/DRAM is fast via JTAG, register IO is not great. > 2) LifeC locks the RPC HF access > - This is a problem, since the JTAG probe cannot access it once > it's locked. There might be a way around it, but it's rather > nasty -- use boundary scan test mode to either flip MD pins or > access the HF bus directly and bitbang at least erase command > to wipe the first few sectors, then reset the CPU and have it > drop to SCIF loader mode, then stop the CPU and reprogram the > HF (since the SCIF loader runs in EL3 and does not touch the > lifec settings. > > Neither of 1) and 2) is implemented, but can be implemented if there is > interest. 1) looks like a performance issue to me (suboptimal flashing time). To be honest, I don't think this is a deal-breaker, assuming that erasing/re-writing the whole 64MiB HF doesn't exceed ~10-15min. It is also my understanding this is subject of future optimization. 2) looks like a functional issue (insufficient permission to write-access HF). To make things clear, could you please stress if http://openocd.zylin.com/5149 already allows updating ATF/U-Boot/OPTEE on HF of R-Car Gen3 or is it still awaiting some fixes? > > > 1.d. Use CPLD Configurator > > + H3_M3_StarterKit_Configurator.exe is a Windows tool shipped by > > Renesas, hence readily available, which allows to modify the MD > > pins, to conveniently switch between QSPI/Hyperflash/SCIF > > boot mode from a GUI > > + Most of the advantages pointed out above > > - ULCB-only solution (i.e. does not apply to Salvator-X) > > - Requires a Windows host > > Where can I obtain this and are there sources / documentation available? I am able to find below related package freely available: https://elinux.org/File:H3_StarterKit_CPLD_Update_20190408.zip Unfortunately, it doesn't include H3_M3_StarterKit_Configurator.exe. The user who uploaded the file is https://elinux.org/User:RenesasJa. Are you aware of any messaging/commenting feature on elinux.org? If not, I hope Michael (CC-ed) can answer your question. Hopefully he sees this message. If not, I can forward your question to him via mantis. Thank you! > > -- > Best regards, > Marek Vasut -- Best Regards, Eugeniu.
