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Diffstat (limited to 'techlibs/xilinx/brams_xc4v.txt')
| -rw-r--r-- | techlibs/xilinx/brams_xc4v.txt | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/techlibs/xilinx/brams_xc4v.txt b/techlibs/xilinx/brams_xc4v.txt new file mode 100644 index 000000000..2301835ea --- /dev/null +++ b/techlibs/xilinx/brams_xc4v.txt @@ -0,0 +1,169 @@ +# Block RAMs for Virtex 4+. +# The corresponding mapping files are: +# - brams_xc3sda_map.v: Spartan 3A DSP, Spartan 6 +# - brams_xc4v_map.v: Virtex 4 +# - brams_xc5v_map.v: Virtex 5 +# - brams_xc6v_map.v: Virtex 6, Series 7 +# - brams_xcu_map.v: Ultrascale + +ram block $__XILINX_BLOCKRAM_TDP_ { + byte 9; + ifdef HAS_SIZE_36 { + option "MODE" "HALF" { + abits 14; + widths 1 2 4 9 18 per_port; + cost 129; + } + option "MODE" "FULL" { + abits 15; + widths 1 2 4 9 18 36 per_port; + cost 257; + } + ifdef HAS_CASCADE { + option "MODE" "CASCADE" { + abits 16; + # hack to enforce same INIT layout as in the other modes + widths 1 2 4 9 per_port; + cost 513; + } + } + } else { + option "MODE" "FULL" { + abits 14; + widths 1 2 4 9 18 36 per_port; + cost 129; + } + ifdef HAS_CASCADE { + option "MODE" "CASCADE" { + abits 15; + widths 1 2 4 9 per_port; + cost 257; + } + } + } + init any; + port srsw "A" "B" { + option "MODE" "HALF" { + width mix; + } + option "MODE" "FULL" { + width mix; + } + option "MODE" "CASCADE" { + width mix 1; + } + ifdef HAS_ADDRCE { + # TODO + # addrce; + } + # Spartan 6 and Virtex 6 have a bug where READ_FIRST is not usable with asynchronous clocks. + ifdef HAS_CONFLICT_BUG { + option "HAS_RDFIRST" 1 { + clock posedge "C"; + } + option "HAS_RDFIRST" 0 { + clock posedge; + } + } else { + clock posedge; + } + clken; + rdsrst any gated_clken; + rdinit any; + portoption "WRITE_MODE" "NO_CHANGE" { + rdwr no_change; + option "MODE" "CASCADE" { + forbid; + } + } + portoption "WRITE_MODE" "WRITE_FIRST" { + ifdef HAS_SIZE_36 { + rdwr new; + } else { + rdwr new_only; + } + } + ifdef HAS_CONFLICT_BUG { + option "HAS_RDFIRST" 1 { + portoption "WRITE_MODE" "READ_FIRST" { + rdwr old; + wrtrans all old; + } + } + } else { + portoption "WRITE_MODE" "READ_FIRST" { + rdwr old; + wrtrans all old; + } + } + optional_rw; + } +} + +ifdef HAS_SIZE_36 { + ram block $__XILINX_BLOCKRAM_SDP_ { + byte 9; + option "MODE" "HALF" { + abits 14; + widths 1 2 4 9 18 36 per_port; + cost 129; + } + option "MODE" "FULL" { + abits 15; + widths 1 2 4 9 18 36 72 per_port; + cost 257; + } + init any; + port sw "W" { + ifndef HAS_MIXWIDTH_SDP { + option "MODE" "HALF" width 36; + option "MODE" "FULL" width 72; + } + ifdef HAS_ADDRCE { + # TODO + # addrce; + } + # Spartan 6 and Virtex 6 have a bug where READ_FIRST is not usable with asynchronous clocks. + ifdef HAS_CONFLICT_BUG { + option "WRITE_MODE" "READ_FIRST" { + clock posedge "C"; + } + option "WRITE_MODE" "WRITE_FIRST" { + clock posedge; + } + } else { + clock posedge; + } + clken; + option "WRITE_MODE" "READ_FIRST" { + wrtrans all old; + } + optional; + } + port sr "R" { + ifndef HAS_MIXWIDTH_SDP { + option "MODE" "HALF" width 36; + option "MODE" "FULL" width 72; + } + ifdef HAS_ADDRCE { + # TODO + # addrce; + } + # Spartan 6 and Virtex 6 have a bug where READ_FIRST is not usable with asynchronous clocks. + ifdef HAS_CONFLICT_BUG { + option "WRITE_MODE" "READ_FIRST" { + clock posedge "C"; + } + option "WRITE_MODE" "WRITE_FIRST" { + clock posedge; + } + } else { + clock posedge; + } + clken; + rdsrst any gated_clken; + rdinit any; + optional; + } + } +} |