Hi Peter & Philip,

JTAG works on my hikey platform. Great thanks for your work.

But it seems that there're still some issues on supporting aarch64.

1. After linux booted, I use "halt" command to stop kernel. Then use "reg" command.
===== arm v8 registers
(34) x0 (/64): 0x0000000039613818 (dirty)
(35) x1 (/64): 0x0000000000000066
(36) x2 (/64): 0x0000000000000039
(37) x3 (/64): 0x00000000004ACAC4
(38) x4 (/64): 0x0000000000000301
(39) x5 (/64): 0x0000000000BF0778
(40) x6 (/64): 0x0000000000BF3295
(41) x7 (/64): 0x00000000642D6973
(42) x8 (/64): 0x0000000065757165
(43) x9 (/64): 0x0000000000000000
(44) x10 (/64): 0x0000000000000006
(45) x11 (/64): 0x00000000000000EE
(46) x12 (/64): 0x0000000030402070
(47) x13 (/64): 0x0000000000000006
(48) x14 (/64): 0x0000000030306632
(49) x15 (/64): 0x0000000000000003
(50) x16 (/64): 0x0000000000A4FCD0
(51) x17 (/64): 0x0000000000000004
(52) x18 (/64): 0x0000000000000001
(53) x19 (/64): 0x0000000000BF3290
(54) x20 (/64): 0x0000000000BF3296
(55) x21 (/64): 0x0000000039613818
(56) x22 (/64): 0x00000000004ACAC4
(57) x23 (/64): 0x00000000007F4000
(58) x24 (/64): 0x0000000000A21E00
(59) x25 (/64): 0x000000003D65B8F0
(60) x26 (/64): 0x0000000000BF2D30
(61) x27 (/64): 0x000000000000004E
(62) x28 (/64): 0x0000000000000006
(63) x29 (/64): 0x000000003D2979D0
(64) x30 (/64): 0x00000000004A1028
(65) sp (/64): 0x000000003D2979D0
(66) pc (/64): 0x00000000004ACAD0
(67) CPSR (/32): 0x200000C5

PC value is wrong. I think that it should be 0xffffffc000xxxxxx.

2. Fail to resume after halting at linux kernel.

3. "virt2phys" command isn't supported.

4. How to load symbol table when I debug firmware or linux kernel?

Best Regards
Haojian

Date: Fri, 31 Jul 2015 12:38:59 +0100
From: peter.griffin@linaro.org
To: dev@lists.96boards.org
CC: philip.attfield@linaro.org
Subject: [Dev] HiKey and OpenOCD

Hi folks,

For anyone who is interested there is a open source OpenOCD / GDB WIP debug solution available for HiKey.

I've created a wiki page here https://github.com/96boards/documentation/wiki/JTAG-on-HiKey

Which documents the hardware setup, where you can get the code, and a overview of what is currently working.

Thanks to Philip Attfield who has already provided some patches to overcome several issues I was facing with read_memory and GDB config.

Please feel free to update the wiki page with any additional info you find out (thanks to Dan Thompson for already doing this), and patches making OpenOCD support for HiKey even better are most welcome :)

regards,

Peter.


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