[v3] Add Model for Tenstorrent Atlantis PRCM

[PATCH v3 0/3] Add Model for Tenstorrent Atlantis PRCM

Anirudh Srinivasan posted 3 patches 3 weeks, 1 day ago

Diff against v1 v2
Download series mbox

Patches applied successfully (tree, apply log)
git fetch https://github.com/patchew-project/qemu tags/patchew/20260904-atlantis._5Fprcm-v3-0-8bf20795a381@oss.tenstorrent.com

Maintainers: Joel Stanley <joel@jms.id.au>, Nicholas Piggin <npiggin@gmail.com>, Anirudh Srinivasan <asrinivasan@oss.tenstorrent.com>, Michael Ellerman <mpe@kernel.org>, Portia Stephens <portias@oss.tenstorrent.com>, Pierrick Bouvier <pierrick.bouvier@oss.qualcomm.com>, Palmer Dabbelt <palmer@dabbelt.com>, Alistair Francis <alistair.francis@wdc.com>, Weiwei Li <liwei1518@gmail.com>, Daniel Henrique Barboza <daniel.barboza@oss.qualcomm.com>, Liu Zhiwei <zhiwei_liu@linux.alibaba.com>, Chao Liu <chao.liu@processmission.com>

MAINTAINERS                        |   2 +
docs/system/riscv/tt_atlantis.rst  |   1 +
hw/misc/meson.build                |   1 +
hw/misc/trace-events               |   4 +
hw/misc/tt_atlantis_prcm.c         | 446 +++++++++++++++++++++++++++++++++++++
hw/riscv/tt_atlantis.c             | 109 ++++++++-
include/hw/misc/tt_atlantis_prcm.h |  51 +++++
include/hw/riscv/tt_atlantis.h     |  28 +++
8 files changed, 632 insertions(+), 10 deletions(-)

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[PATCH v3 0/3] Add Model for Tenstorrent Atlantis PRCM

Posted by Anirudh Srinivasan 3 weeks, 1 day ago

This series adds a qemu model for the PRCM blocks present in Tenstorrent
Atlantis. This block controls clock, reset and other misc functionality
in the SoC. Linux support for the Clocks/Resets served by the RCPU PRCM
was added in [1]. This PRCM model has been tested with a linux DT that
enables the PRCM and sets the UART clk to the one provided by the PRCM.
This DT will be sent out shortly.

[1] https://lore.kernel.org/linux-riscv/20260306-atlantis-clocks-v8-0-6c9b14a4aa8e@oss.tenstorrent.com/

Signed-off-by: Anirudh Srinivasan <asrinivasan@oss.tenstorrent.com>
---
Changes in v3:
- Rebase on top of Joel's socify series v3 https://lore.kernel.org/qemu-riscv/20260903055131.257903-1-joel@jms.id.au/T/#t
- I2C and UART now use clk provided by PRCM, and periph_clk is dropped
- Addressed style edit comments from Joel (comment about clk IDs coming from DT bindings,) and Alistair (drop size from trace prints, move decalartions to top of function, use PRCM_DOMAIN enums)
- Link to v2: https://lore.kernel.org/qemu-devel/20260817-atlantis_prcm-v2-0-ffba0b944419@oss.tenstorrent.com

Changes in v2:
- Coding style edits based on Chao Liu's feedback
- Changed prcm to use Resettable inferface instead of legacy reset
- Edits requested by Daniel related to tracing, pll_en logic and unnecessary switch/case statement
- Added comments to some of the magic numbers in the reset values for PRCM registers
- Link to v1: https://lore.kernel.org/qemu-devel/20260729-atlantis_prcm-v1-0-502882933e51@oss.tenstorrent.com

---
Anirudh Srinivasan (3):
      hw/misc: Add Tenstorrent Atlantis PRCM model
      hw/riscv/tt-atlantis: Add PRCMs to tt-atlantis model
      hw/riscv/tt-atlantis: Update UART and I2C to use clk from PRCM

 MAINTAINERS                        |   2 +
 docs/system/riscv/tt_atlantis.rst  |   1 +
 hw/misc/meson.build                |   1 +
 hw/misc/trace-events               |   4 +
 hw/misc/tt_atlantis_prcm.c         | 446 +++++++++++++++++++++++++++++++++++++
 hw/riscv/tt_atlantis.c             | 109 ++++++++-
 include/hw/misc/tt_atlantis_prcm.h |  51 +++++
 include/hw/riscv/tt_atlantis.h     |  28 +++
 8 files changed, 632 insertions(+), 10 deletions(-)
---
base-commit: b23a62773a7856299cbb3782e64968b6a92c792f
change-id: 20260727-atlantis_prcm-b642cfb37d57

Best regards,
--  
Anirudh Srinivasan <asrinivasan@oss.tenstorrent.com>