Coordinate systems docs

[pjanevskiTT]

Write a doc about coordinate systems. Base for this document is open-umd document which explains all coordinate systems we have

Note for reviews

Feel free to suggest any naming conventions for these coordinate systems. Naming from the initial doc is going to be followed for now, just because it seems that this is mostly accepted across different tenstorrent products (syseng tools, tt-metal, tt-umd)

[pjanevskiTT]

Comment from original harvesting PR #202 (comment)

[pjanevskiTT]

One more comment from original PR #202 (comment)

[alewycky-tenstorrent]

Suggestion on naming:

• Physical: actual chip layout, not used by SW
• NOC post-translate: the burned-in NOC coordinates (currently "Physical")
• NOC pre-translate: NOC translation LUT input coordinates (currently "HW translated")
• Virtualized: no change (virtualized is the coord space that makes NOC pre-translate look like a chip without translation at all)
• Logical: no change (logical is the coord space with just tensixes based at 0-0?)

Also I suggest addressing them in this order (or the reverse) because that's how they are layered.

[pjanevskiTT]

@joelsmithTT I know you had useful remarks about original harvesting docs. Let me know if you think docs/coordinate_systems.md is a step in the right direction, in order to continue working on expanding the docs here

fyi @broskoTT

[joelsmithTT]

Is there a reason we use the word physical for these? I think it'd be clearer to call them NOC coordinates.

The physical layout of the chip (if you are looking down at it) is not consistent with what we have been calling "physical" coordinates.

[pjanevskiTT]

Yes I know and I agree, I can rename that both in the docs and in the CoreCoord