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| author | Lofty <dan.ravensloft@gmail.com> | 2022-03-10 10:28:57 +0000 |
|---|---|---|
| committer | Lofty <dan.ravensloft@gmail.com> | 2022-03-12 17:08:20 +0000 |
| commit | 883f27480274cd6385bce118dc31d260ec9ae832 (patch) | |
| tree | 635dc5ad6d5919e8cbdbac1dda5defa2fb142098 /mistral | |
| parent | 3e688a3ac9ae35a894d5c2c19f2d9591b746d8da (diff) | |
| download | nextpnr-883f27480274cd6385bce118dc31d260ec9ae832.tar.gz nextpnr-883f27480274cd6385bce118dc31d260ec9ae832.tar.bz2 nextpnr-883f27480274cd6385bce118dc31d260ec9ae832.zip | |
mistral: M10K initialisation support
Diffstat (limited to 'mistral')
| -rw-r--r-- | mistral/bitstream.cc | 19 | ||||
| -rw-r--r-- | mistral/constids.inc | 1 |
2 files changed, 18 insertions, 2 deletions
diff --git a/mistral/bitstream.cc b/mistral/bitstream.cc index 6a2c3825..c5105008 100644 --- a/mistral/bitstream.cc +++ b/mistral/bitstream.cc @@ -153,9 +153,24 @@ struct MistralBitgen cv->bmux_b_set(CycloneV::M10K, pos, CycloneV::DISABLE_UNUSED, bi, 0); - // Note for future us: the RAM init contents are inverted. + auto permute_init = [](int64_t init) -> int64_t { + const int permutation[40] = {0, 20, 10, 30, 1, 21, 11, 31, 2, 22, 12, 32, 3, 23, 13, 33, 4, 24, 14, 34, + 5, 25, 15, 35, 6, 26, 16, 36, 7, 27, 17, 37, 8, 28, 18, 38, 9, 29, 19, 39}; + + int64_t output = 0; + for (int bit = 0; bit < 40; bit++) + output |= ((init >> permutation[bit]) & 1) << bit; + return ~output; // RAM init is inverted. + }; + + Property init; + if (ci->params.count(id_INIT) == 0) { + init = Property{0, 10240}; + } else { + init = ci->params.at(id_INIT); + } for (int bi = 0; bi < 256; bi++) - cv->bmux_r_set(CycloneV::M10K, pos, CycloneV::RAM, bi, 0xffffffffff); + cv->bmux_r_set(CycloneV::M10K, pos, CycloneV::RAM, bi, permute_init(init.extract(bi * 40, 40).as_int64())); } void write_cells() diff --git a/mistral/constids.inc b/mistral/constids.inc index 262fd12a..754a96b3 100644 --- a/mistral/constids.inc +++ b/mistral/constids.inc @@ -100,6 +100,7 @@ X(cyclonev_oscillator) X(cyclonev_hps_interface_mpu_general_purpose) X(MISTRAL_M10K) +X(INIT) X(ADDRSTALLA) X(ADDRSTALLB) X(CFG_ABITS) |