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nexus: Adding pin definitions

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Signed-off-by: David Shah <dave@ds0.me>
This commit is contained in:
David Shah 2020-01-20 15:20:00 +00:00
parent 46010f33ad
commit 887d7c717b
3 changed files with 75 additions and 0 deletions
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12
nexus/arch.h
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@ -1271,6 +1271,18 @@ struct Arch : BaseCtx
int wire = pip_data(pip).to_wire;
return db->loctypes[chip_info->grid[pip.tile].loc_type].wires[wire].name;
}
// -------------------------------------------------
// Get a map cell type -> pins that can be inverted
void get_invertible_pins(std::unordered_map<IdString, std::unordered_set<IdString>> &pins) const;
// Get a map cell -> pin -> value _it takes_ if disconnected
void get_pins_floating_value(std::unordered_map<IdString, std::unordered_map<IdString, bool>> &pins) const;
// Get a map cell -> pin -> value _it must be connected to_ if disconnected
// Default value for all pins, if not specified is 0
void
get_pins_default_value(std::unordered_map<IdString, std::unordered_map<IdString, Property::State>> &pins) const;
// -------------------------------------------------
NeighWireRange neigh_wire_range(WireId wire) const

10
nexus/pack.cc
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@ -40,6 +40,7 @@ struct NexusPacker
std::unordered_map<IdString, IdString> param_xform;
std::vector<std::pair<IdString, std::string>> set_attrs;
std::vector<std::pair<IdString, Property>> set_params;
std::vector<std::pair<IdString, Property>> default_params;
};
void xform_cell(const std::unordered_map<IdString, XFormRule> &rules, CellInfo *ci)
@ -87,6 +88,10 @@ struct NexusPacker
for (auto &attr : rule.set_attrs)
ci->attrs[attr.first] = attr.second;
for (auto &param : rule.default_params)
if (!ci->params.count(param.first))
ci->params[param.first] = param.second;
for (auto &param : rule.set_params)
ci->params[param.first] = param.second;
}
@ -134,6 +139,11 @@ struct NexusPacker
ff_rules[type].port_xform[id_D] = id_M; // will be rerouted to DI later if applicable
ff_rules[type].port_xform[id_SP] = id_CE;
ff_rules[type].port_xform[id_Q] = id_Q;
ff_rules[id_FD1P3BX].default_params.emplace_back(id_CLKMUX, std::string("CLK"));
ff_rules[id_FD1P3BX].default_params.emplace_back(id_CEMUX, std::string("CE"));
ff_rules[id_FD1P3BX].default_params.emplace_back(id_LSRMUX, std::string("LSR"));
ff_rules[id_FD1P3BX].set_params.emplace_back(id_LSRMODE, std::string("LSR"));
}
// Async preload
ff_rules[id_FD1P3BX].set_params.emplace_back(id_SRMODE, std::string("ASYNC"));

53
nexus/pins.cc Normal file
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@ -0,0 +1,53 @@
/*
* nextpnr -- Next Generation Place and Route
*
* Copyright (C) 2020 David Shah <dave@ds0.me>
*
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
#include "nextpnr.h"
NEXTPNR_NAMESPACE_BEGIN
void Arch::get_invertible_pins(std::unordered_map<IdString, std::unordered_set<IdString>> &pins) const
{
pins[id_OXIDE_FF] = {id_CLK, id_LSR, id_CE};
pins[id_RAMW] = {id_WCK};
pins[id_SEIO18_CORE] = {id_T};
pins[id_SEIO33_CORE] = {id_T};
}
void Arch::get_pins_floating_value(std::unordered_map<IdString, std::unordered_map<IdString, bool>> &pins) const
{
pins[id_OXIDE_COMB] = {{id_A, true}, {id_B, true}, {id_C, true}, {id_D, true}, {id_SEL, true}};
pins[id_OXIDE_FF] = {{id_CLK, false}, {id_LSR, true}, {id_CE, true}};
pins[id_SEIO18_CORE] = {{id_T, true}};
pins[id_SEIO33_CORE] = {{id_T, true}};
}
void Arch::get_pins_default_value(
std::unordered_map<IdString, std::unordered_map<IdString, Property::State>> &pins) const
{
pins[id_OXIDE_COMB] = {{id_A, Property::S1}, {id_B, Property::S1}, {id_C, Property::S1},
{id_D, Property::S1}, {id_SEL, Property::S1}, {id_WAD0, Property::Sx},
{id_WAD1, Property::Sx}, {id_WAD2, Property::Sx}, {id_WAD3, Property::Sx},
{id_WCK, Property::Sx}, {id_WRE, Property::Sx}, {id_WD, Property::Sx}};
pins[id_OXIDE_FF] = {{id_CE, Property::S1}, {id_DI, Property::Sx}};
pins[id_SEIO18_CORE] = {{id_T, Property::S1}};
pins[id_SEIO33_CORE] = {{id_T, Property::S1}};
}
NEXTPNR_NAMESPACE_END