diff options
Diffstat (limited to 'mistral/arch.h')
| -rw-r--r-- | mistral/arch.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/mistral/arch.h b/mistral/arch.h index 3d939c0d..d4f6bd5e 100644 --- a/mistral/arch.h +++ b/mistral/arch.h @@ -225,6 +225,45 @@ struct ArchRanges : BaseArchRanges using AllPipsRangeT = AllPipRange; }; +// This enum captures different 'styles' of cell pins +// This is a combination of the modes available for a pin (tied high, low or inverted) +// and the default value to set it to not connected +enum CellPinStyle +{ + PINOPT_NONE = 0x0, // no options, just signal as-is + PINOPT_LO = 0x1, // can be tied low + PINOPT_HI = 0x2, // can be tied high + PINOPT_INV = 0x4, // can be inverted + + PINOPT_LOHI = 0x3, // can be tied low or high + PINOPT_LOHIINV = 0x7, // can be tied low or high; or inverted + + PINOPT_MASK = 0x7, + + PINDEF_NONE = 0x00, // leave disconnected + PINDEF_0 = 0x10, // connect to 0 if not used + PINDEF_1 = 0x20, // connect to 1 if not used + + PINDEF_MASK = 0x30, + + PINGLB_CLK = 0x100, // pin is a 'clock' for global purposes + + PINGLB_MASK = 0x100, + + PINSTYLE_NONE = 0x000, // default + + PINSTYLE_COMB = 0x017, // combinational signal, defaults low, can be inverted and tied + PINSTYLE_CLK = 0x107, // CLK type signal, invertible and defaults to disconnected + PINSTYLE_CE = 0x027, // CE type signal, invertible and defaults to enabled + PINSTYLE_RST = 0x017, // RST type signal, invertible and defaults to not reset + PINSTYLE_DEDI = 0x000, // dedicated signals, leave alone + PINSTYLE_INP = 0x001, // general inputs, no inversion/tieing but defaults low + PINSTYLE_PU = 0x022, // signals that float high and default high + + PINSTYLE_CARRY = 0x001, // carry chains can be floating or 0? + +}; + struct Arch : BaseArch<ArchRanges> { ArchArgs args; @@ -410,6 +449,12 @@ struct Arch : BaseArch<ArchRanges> void assign_default_pinmap(CellInfo *cell); static const std::unordered_map<IdString, IdString> comb_pinmap; + + // ------------------------------------------------- + + typedef std::unordered_map<IdString, CellPinStyle> CellPinsData; // pins.cc + static const std::unordered_map<IdString, CellPinsData> cell_pins_db; // pins.cc + CellPinStyle get_cell_pin_style(const CellInfo *cell, IdString port) const; // pins.cc }; NEXTPNR_NAMESPACE_END |