[v2,0/2] ppc/pnv: ADU model for POWER9/10

Message

Nicholas Piggin May 10, 2024, 2:14 p.m. UTC

These patches adds the framework for a proper ADU model rather than
putting registers into the xscom default ops, and implements ADU's
indirect LPC access functionality which IBM's proprietary firmware
uses to provide consoles on UARTs.

Patch 1 should be quite a simple hooking up the xscom address space.

Patch 2 implements one of the memory access functions of the ADU that
drives access to LPC address space from XSCOM register operations which
is non-trivial but there are similar examples already in tree.

Since v1:
- Changed to GPL-2.0-or-later
- Added an assertion for adu-lpc link
- Renamed funcions to pnv_lpc_opb_ prefix rather than pnv_opb_lpc_
- Removed the unnecessary ADU class

Thanks,
Nick

Nicholas Piggin (2):
  ppc/pnv: Begin a more complete ADU LPC model for POWER9/10
  ppc/pnv: Implement ADU access to LPC space

 include/hw/ppc/pnv_adu.h   |  32 ++++++
 include/hw/ppc/pnv_chip.h  |   3 +
 include/hw/ppc/pnv_lpc.h   |   5 +
 include/hw/ppc/pnv_xscom.h |   6 ++
 hw/ppc/pnv.c               |  20 ++++
 hw/ppc/pnv_adu.c           | 206 +++++++++++++++++++++++++++++++++++++
 hw/ppc/pnv_lpc.c           |  12 +--
 hw/ppc/pnv_xscom.c         |   9 --
 hw/ppc/meson.build         |   1 +
 hw/ppc/trace-events        |   4 +
 10 files changed, 283 insertions(+), 15 deletions(-)
 create mode 100644 include/hw/ppc/pnv_adu.h
 create mode 100644 hw/ppc/pnv_adu.c