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18 Commits

Author SHA1 Message Date
Marcelina Kościelnicka e6f3d1c225 kernel/mem: Introduce transparency masks. 2021-08-11 00:04:16 +02:00
Marcelina Kościelnicka 19720b970d memory: Introduce $meminit_v2 cell, with EN input. 2021-07-28 23:18:38 +02:00
Marcelina Kościelnicka 8bf9cb407d kernel/mem: Add a coalesce_inits helper. 
While this helper is already useful to squash sequential initializations
into one in cxxrtl, its main purpose is to squash overlapping masked memory
initializations (when they land) and avoid having to deal with them in
cxxrtl runtime.
 2021-07-13 15:59:11 +02:00
Marcelina Kościelnicka 0565c642a0 kernel/mem: Use delayed removal for inits as well. 2021-07-12 18:28:20 +02:00
Marcelina Kościelnicka 6d7d9ab077 kernel/mem: Add documentation for more helper functions. 2021-07-12 18:28:08 +02:00
Marcelina Kościelnicka c86a79bf0b kernel/mem: Make the Mem helpers inherit from AttrObject. 2021-07-12 02:51:08 +02:00
Marcelina Kościelnicka b019db1f37 kernel/mem: Add helpers for write port widening. 2021-05-27 14:32:51 +02:00
Marcelina Kościelnicka 83a218141c kernel/mem: Add sub_addr helpers. 2021-05-26 03:34:02 +02:00
Marcelina Kościelnicka 57ca51be76 kernel/mem: Add prepare_wr_merge helper. 2021-05-26 02:55:00 +02:00
Marcelina Kościelnicka 24b880b2de kernel/mem: Add model support for read port init value and resets. 
Like wide port support, this is still completely unusable, and support
in various passes will be gradually added later.  It also has no support
at all in the cell library, so attempting to create a read port with
a reset or initial value will cause an assert failure for now.
 2021-05-25 20:06:00 +02:00
Marcelina Kościelnicka 4858721637 kernel/mem: Add emulate_priority helper. 2021-05-25 12:25:58 +02:00
Marcelina Kościelnicka 35ee774ea8 kernel/mem: Add a Mem::narrow helper to split up wide ports. 2021-05-25 02:07:25 +02:00
Marcelina Kościelnicka ff9713dd86 kernel/mem: Add model for wide ports. 
Such ports cannot actually be created or used yet, this just adds the
necessary plumbing in the helper.  Subsequent commits will gradually
add wide port support to various yosys passes.
 2021-05-25 02:07:25 +02:00
Marcelina Kościelnicka 95a39d3425 kernel/mem: Add priority_mask to model. 
This is going to be used to store arbitrary priority masks in the
future.  Right now, it is not supported by our cell library, so the
priority_mask is computed from port order on helper construction,
and discarded when emitted.  However, this allows us to already convert
helper-using passes to the new model.
 2021-05-25 00:38:20 +02:00
Marcelina Kościelnicka afd5366fc2 extract_rdff: Add initvals parameter. 
This is not used yet, but will be needed when read port reset/initial
value support lands.
 2021-05-23 22:05:26 +02:00
Marcelina Kościelnicka c7076495f1 kernel/mem: Add a check() function. 2021-05-22 21:42:53 +02:00
Marcelina Kościelnicka ff9e0394b8 kernel/mem: defer port removal to emit() 2021-05-22 21:42:53 +02:00
Marcelina Kościelnicka 8720482ebd Add new helper structures to represent memories. 2020-10-21 17:51:20 +02:00