Re: [OpenOCD-user] Advice on Snapdragon 820

[Matthias W. <mat...@we...>]

Hello Sergei,

On Thursday 05 January 2017 01:25:35 Sergei Antonov wrote:
> Hello!
> I'd like to use OpenOCD with a development board containing a Qualcomm
> Snapdragon 820 (APQ8096) processor, its architecture is AArch64. Here
> is the scanned JTAG chain:
> 
> Info : JTAG tap: auto0.tap tap/device found: 0x5ba00477 (mfg: 0x23b
> (ARM Ltd.), part: 0xba00, ver: 0x5)
> Info : JTAG tap: auto1.tap tap/device found: 0x000016dd (mfg: 0x36e
> (Certicom Corporation), part: 0x0001, ver: 0x0)
> Info : JTAG tap: auto2.tap tap/device found: 0x4003e0e1 (mfg: 0x070
> (Qualcomm), part: 0x003e, ver: 0x4)
> 
> I suppose, I can debug device 0x5ba00477 as aarch64 target using
> development source code. What repo/branch of OpenOCD should I use?
> On Gerrit there are lots of patches for aarch64, I'm confused about
> what exactly is state-of-the-art or has best chances to work on my
> hardware.

If you checkout http://openocd.zylin.com/#/c/3832, you get a pretty good base 
for aarch64 debugging. You will also likely need this patch:

http://openocd.zylin.com/#/c/3710 on top, you should be able to cherry-pick 
it.

If you need realtime support, good chance you can reach me on #openocd on 
irc.freenode.net.

BR,
Matthias

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