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lowRISC / opentitan

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Failed to read priv register. after mdw 0x8000 0x10 #7692

Closed nicolast0604 closed 1 year ago

nicolast0604 commented 3 years ago

mdw 0x8000 0x10 Failed to read priv register.

nicolast0604@nicolast0604-VirtualBox:~$ telnet localhost 4444 Trying 127.0.0.1... Connected to localhost. Escape character is '^]'. Open On-Chip Debugger

mdw 0x8000 0x10 Failed to read priv register. 0x00008000: 2ad0006f 00000000 00000000 2a70006f 00000000 00000000 00000000 2970006f 0x00008020: 00000000 00000000 00000000 2870006f 00000000 00000000 00000000 00000000

Open On-Chip Debugger 0.11.0 Licensed under GNU GPL v2 For bug reports, read http://openocd.org/doc/doxygen/bugs.html DEPRECATED! use 'adapter speed' not 'adapter_khz' Info : Hardware thread awareness created force hard breakpoints none separate

Info : Listening on port 6666 for tcl connections Info : Listening on port 4444 for telnet connections Info : clock speed 30000 kHz Info : JTAG tap: riscv.tap tap/device found: 0x00000001 (mfg: 0x000 (), part: 0x0000, ver: 0x0) Warn : JTAG tap: riscv.tap UNEXPECTED: 0x00000001 (mfg: 0x000 (), part: 0x0000, ver: 0x0) Error: JTAG tap: riscv.tap expected 1 of 1: 0x04f5484d (mfg: 0x426 (Google Inc), part: 0x4f54, ver: 0x0) Error: Trying to use configured scan chain anyway... Warn : Bypassing JTAG setup events due to errors Info : datacount=2 progbufsize=8 Info : Examined RISC-V core; found 1 harts Info : hart 0: XLEN=32, misa=0x40101104 Info : starting gdb server for riscv.tap.0 on 3333 Info : Listening on port 3333 for gdb connections Info : accepting 'telnet' connection on tcp/4444 Error: Failed to read priv register.

estimate 2

andreaskurth commented 1 year ago

Triaged for rv_dm. Assigning to M2.5 with https://github.com/lowRISC/opentitan/labels/Priority%3AP2 because we should try to reproduce this and ensure there's no bug hiding here.

GregAC commented 1 year ago

Revised estimate lower. Given this is an old issue it's worth spending a little time to try the actions that lead to the reported problem but not spending excessive time on it as many fixed have been occurring around debug.

GregAC commented 1 year ago

Closing as other test cases will cover this and this is an old issue that hasn't been reported as broken again.