linux-kernel - Re: [PATCH v15 0/4] add zynqmp TCM bindings

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Message-ID: <Zh6uTkK/ZoI5+l/F@p14s>
Date: Tue, 16 Apr 2024 10:58:54 -0600
From: Mathieu Poirier <mathieu.poirier@...aro.org>
To: Tanmay Shah <tanmay.shah@....com>
Cc: andersson@...nel.org, robh@...nel.org,
	krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
	michal.simek@....com, ben.levinsky@....com,
	linux-remoteproc@...r.kernel.org, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v15 0/4] add zynqmp TCM bindings

On Fri, Apr 12, 2024 at 11:37:04AM -0700, Tanmay Shah wrote:
> Tightly-Coupled Memories(TCMs) are low-latency memory that provides
> predictable instruction execution and predictable data load/store
> timing. Each Cortex-R5F processor contains exclusive two 64 KB memory
> banks on the ATCM and BTCM ports, for a total of 128 KB of memory.
> In lockstep mode, both 128KB memory is accessible to the cluster.
> 
> As per ZynqMP Ultrascale+ Technical Reference Manual UG1085, following
> is address space of TCM memory. The bindings in this patch series
> introduces properties to accommodate following address space with
> address translation between Linux and Cortex-R5 views.
> 
> |     |     |     |
> | --- | --- | --- |
> |      *Mode*        |   *R5 View* | *Linux view* |  Notes               |
> | *Split Mode*       | *start addr*| *start addr* |                      |
> | R5_0 ATCM (64 KB)  | 0x0000_0000 | 0xFFE0_0000  |                      |
> | R5_0 BTCM (64 KB)  | 0x0002_0000 | 0xFFE2_0000  |                      |
> | R5_1 ATCM (64 KB)  | 0x0000_0000 | 0xFFE9_0000  | alias of 0xFFE1_0000 |
> | R5_1 BTCM (64 KB)  | 0x0002_0000 | 0xFFEB_0000  | alias of 0xFFE3_0000 |
> |  ___               |     ___     |    ___       |                      |
> | *Lockstep Mode*    |             |              |                      |
> | R5_0 ATCM (128 KB) | 0x0000_0000 | 0xFFE0_0000  |                      |
> | R5_0 BTCM (128 KB) | 0x0002_0000 | 0xFFE2_0000  |                      |
> 
> References:
> UG1085 TCM address space:
> https://docs.xilinx.com/r/en-US/ug1085-zynq-ultrascale-trm/Tightly-Coupled-Memory-Address-Map
>

I have applied patches 1, 2 and 4 of this set.  Patch 3 should to through
Michal's tree.

Thanks,
Mathieu

> ---
> 
> prerequisite-patch-link: https://lore.kernel.org/all/d4556268-8274-4089-949f-3b97d67793c7@gmail.com/
> Base Branch: 6.9.rc2
> 
> Changes in v15:
>   - Use hardcode TCM addresses as fallback method if "reg" unavailable
>   - Use new bindings for r5fss subsystem
> 
> Changes in v14:
>   - Add xlnx,tcm-mode property and use it for TCM configuration
>   - Add Versal and Versal-NET platform support
>   - Maintain backward compatibility for ZynqMP platform and use hardcode
>     TCM addresses
> 
> Changes in v13:
>   - Have power-domains property for lockstep case instead of
>     keeping it flexible.
>   - Add "items:" list in power-domains property
> 
> 
> Radhey Shyam Pandey (1):
>   dt-bindings: remoteproc: add Tightly Coupled Memory (TCM) bindings
> 
> Tanmay Shah (3):
>   remoteproc: zynqmp: fix lockstep mode memory region
>   dts: zynqmp: add properties for TCM in remoteproc
>   remoteproc: zynqmp: parse TCM from device tree
> 
>  .../remoteproc/xlnx,zynqmp-r5fss.yaml         | 279 ++++++++++++++++--
>  .../boot/dts/xilinx/zynqmp-zcu102-rev1.0.dts  |   8 +
>  arch/arm64/boot/dts/xilinx/zynqmp.dtsi        |  67 ++++-
>  drivers/remoteproc/xlnx_r5_remoteproc.c       | 273 +++++++++--------
>  4 files changed, 459 insertions(+), 168 deletions(-)
> 
> 
> base-commit: 4d5aabb6843939fad36912be8bf109adf9af0848
> -- 
> 2.25.1
>