| commit | e96730f7612a3fb85637d8d91645355806752c8a | [log] [tgz] |
|---|---|---|
| author | Timothy Chen <timothytim@google.com> | Mon Sep 14 23:10:42 2020 -0700 |
| committer | tjaychen <timothytim@google.com> | Thu Sep 17 17:12:53 2020 -0700 |
| tree | 9a2dfa88c8453e5d8994ad5fa0f054d7fe30bb29 | |
| parent | 34ca5429362fbdcdf204293bf8b78bbda2e15ea9 [diff] |
[flash_ctrl] Add ECC to program / erase datapaths
- New parameters are defined to represent the "metadata" of flas
- Software only has direct access to data portion
- Metadata area is used for empty detection as well as ECC
- There are currently no plans to make metadata directly accessible to
software, although that can be done.
- ECC and scramble are always disabled / enabled at the same time.
- ECC is calculated on the scrambled data.
- There is no good DV / verilator support yet, To get around the issue,
prim_generic_flash instantiates a memory for main, and another for metadata.
- long term there will need to be a better backdoor solution to flash.
- ECC uncorrectable errors are forwarded up to both the host / controller
- When an uncorrectable error occurs, all F's are returned to the reading agent.
Signed-off-by: Timothy Chen <timothytim@google.com>
[flash_ctrl] update for review comments
Signed-off-by: Timothy Chen <timothytim@google.com>
OpenTitan is an open source silicon Root of Trust (RoT) project. OpenTitan will make the silicon RoT design and implementation more transparent, trustworthy, and secure for enterprises, platform providers, and chip manufacturers. OpenTitan is administered by lowRISC CIC as a collaborative project to produce high quality, open IP for instantiation as a full-featured product. See the OpenTitan site and OpenTitan docs for more information about the project.
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