tree 2ef41fb6599db04172a27339e5a59ea9523f4a6e
parent b236bfee9a9362bd35b299c11184138edc0359c5
author Alex Van Damme <atv@google.com> 1670449409 -0800
committer Alex Van Damme <atv@google.com> 1674584024 -0800

Fixups to run on Nexus platform

- Update the linker scripts to reflect real memory addresses and sizes.
- Updates to some constants (cpu freq, peripheral clock, baud rates).
- Regenerate PLIC constants via regtool, to sync with the current HW.
- Add in a GPIO stub and debug writer interface, and replace the "panic
  panic panic" panic handler with Tock's real one: this gives really
  nice output if you do happen to hit a panic.

Bug: 258850990
Change-Id: I266b54e84b89bd8998f655702b01dfd85735321a