| commit | 69b002acc268aace343a625aa9db8e452d463838 | [log] [tgz] |
|---|---|---|
| author | Pirmin Vogel <vogelpi@lowrisc.org> | Wed Nov 16 03:05:37 2022 +0100 |
| committer | Pirmin Vogel <vogelpi@lowrisc.org> | Wed Nov 16 10:51:48 2022 +0100 |
| tree | 833e9b23c35a1741bd4cafffe2c5726cb62abe1d | |
| parent | f3d5a218d0794e4a7e55daf0be573a4bcd5185b8 [diff] |
[csrng, dv] Fix calls to `cg_err_code_sample()` It turned out that: 1. The previous way of passing the error code to sample didn't work. Somehow, `get_mirrored_value()` doesn't seem to work in this context. Instead, this commit changes the code to now perform a backdoor read of the CSR using `csr_rd()`. 2. Previously, we were using `$clog2()` to convert from the observed error code to the coverpoint. This doesn't work as in quite many cases multiple bits in ERR_CODE are set. Therefore, the sampling function is now called separately for every bit set in ERR_CODE. This has side effect of oversampling the other coverpoints in the same group which certainly isn't nice but it's still sufficient to detect if some bins aren't hit at all. Signed-off-by: Pirmin Vogel <vogelpi@lowrisc.org>
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