Merge branch 'openroad' of https://github.com/ucb-bar/chipyard into openroad

README.md

@@ -84,6 +84,7 @@ These additional publications cover many of the internal components used in Chip
     * **FireMarshal**: N. Pemberton, et al., *ISPASS'21*. [PDF](https://ieeexplore.ieee.org/document/9408192).
 * **VLSI**
     * **Hammer**: E. Wang, et al., *ISQED'20*. [PDF](https://www.isqed.org/English/Archives/2020/Technical_Sessions/113.html).
+    * **Hammer**: H. Liew, et al., *DAC'22*. [PDF](https://dl.acm.org/doi/abs/10.1145/3489517.3530672).
 
 ## Acknowledgements
 

docs/VLSI/ASAP7-Tutorial.rst

@@ -126,9 +126,9 @@ To run DRC & LVS, and view the results in Calibre:
 .. code-block:: shell
 
     make drc CONFIG=TinyRocketConfig
-    ./build/drc-rundir/generated-scripts/view-drc
+    ./build/chipyard.TestHarness.TinyRocketConfig-ChipTop/drc-rundir/generated-scripts/view-drc
     make lvs CONFIG=TinyRocketConfig
-    ./build/lvs-rundir/generated-scripts/view-lvs
+    ./build/chipyard.TestHarness.TinyRocketConfig-ChipTop/lvs-rundir/generated-scripts/view-lvs
 
 Some DRC errors are expected from this PDK, as explained in the `ASAP7 plugin readme <https://github.com/ucb-bar/hammer/blob/master/hammer/technology/asap7>`__.
 Furthermore, the dummy SRAMs that are provided in this tutorial and PDK do not have any geometry inside, so will certainly cause DRC errors.

docs/VLSI/Sky130-Commercial-Tutorial.rst

@@ -1,7 +1,7 @@
 .. _sky130-commercial-tutorial:
 
-Sky130 Tutorial
+Sky130 Commercial Tutorial
-===============
+==========================
 The ``vlsi`` folder of this repository contains an example Hammer flow with the TinyRocketConfig from Chipyard. This example tutorial uses the built-in Sky130 technology plugin and requires access to the included Cadence and Mentor tool plugin submodules. Cadence is necessary for synthesis & place-and-route, while Mentor is needed for DRC & LVS.
 
 Project Structure
@@ -121,6 +121,15 @@ The command ``make buildfile`` generates a set of Make targets in ``build/hammer
 It needs to be re-run if environment variables are changed.
 It is recommended that you edit these variables directly in the Makefile rather than exporting them to your shell environment.
 
+The ``buildfile`` make target has dependencies on both (1) the Verilog that is elaborated from all Chisel sources
+and (2) the mapping of memory instances in the design to SRAM macros;
+all files related to these two steps reside in the ``generated-src/chipyard.TestHarness.TinyRocketConfig-ChipTop`` directory.
+Note that the files in ``generated-src`` vary for each tool/technology flow.
+This especially applies to the Sky130 Commercial vs OpenROAD tutorial flows 
+(due to the ``ENABLE_YOSYS_FLOW`` flag present for the OpenROAD flow), so these flows should be run in separate
+chipyard installations. If the wrong sources are generated, simply run ``make buildfile -B`` to rebuild all targets correctly.
+
+
 For the purpose of brevity, in this tutorial we will set the Make variable ``tutorial=sky130-commercial``,
 which will cause additional variables to be set in ``tutorial.mk``, a few of which are summarized as follows:
 
@@ -161,9 +170,9 @@ To run DRC & LVS, and view the results in Calibre:
 .. code-block:: shell
 
     make drc tutorial=sky130-commercial
-    ./build/drc-rundir/generated-scripts/view_drc
+    ./build/chipyard.TestHarness.TinyRocketConfig-ChipTop/drc-rundir/generated-scripts/view_drc
     make lvs tutorial=sky130-commercial
-    ./build/lvs-rundir/generated-scripts/view_lvs
+    ./build/chipyard.TestHarness.TinyRocketConfig-ChipTop/lvs-rundir/generated-scripts/view_lvs
 
 Some DRC errors are expected from this PDK, especially with regards to the SRAMs, as explained in the
 `Sky130 Hammer plugin README  <https://github.com/ucb-bar/hammer/blob/master/hammer/technology/sky130>`__.

docs/VLSI/Sky130-OpenROAD-Tutorial.rst

@@ -148,6 +148,15 @@ The command ``make buildfile`` generates a set of Make targets in ``build/hammer
 It needs to be re-run if environment variables are changed.
 It is recommended that you edit these variables directly in the Makefile rather than exporting them to your shell environment.
 
+The ``buildfile`` make target has dependencies on both (1) the Verilog that is elaborated from all Chisel sources
+and (2) the mapping of memory instances in the design to SRAM macros;
+all files related to these two steps reside in the ``generated-src/chipyard.TestHarness.TinyRocketConfig-ChipTop`` directory.
+Note that the files in ``generated-src`` vary for each tool/technology flow.
+This especially applies to the Sky130 Commercial vs OpenROAD tutorial flows 
+(due to the ``ENABLE_YOSYS_FLOW`` flag, explained below), so these flows should be run in separate
+chipyard installations. If the wrong sources are generated, simply run ``make buildfile -B`` to rebuild all targets correctly.
+
+
 For the sake of brevity, in this tutorial we will set the Make variable ``tutorial=sky130-openroad``,
 which will cause additional variables to be set in ``tutorial.mk``, a few of which are summarized as follows:
 
@@ -184,7 +193,7 @@ Hammer generates a convenient script to launch these sessions
 
 .. code-block:: shell
 
-    cd ./build/par-rundir
+    cd ./build/chipyard.TestHarness.TinyRocketConfig-ChipTop/par-rundir
     ./generated-scripts/open_chip
 
 Note that the conda OpenROAD package was compiled with the GUI disabled, so in order to view the layout,
@@ -199,7 +208,7 @@ These databases can be restored using the same ``open_chip`` script for debuggin
 
 .. code-block:: shell
 
-    cd build/par-rundir
+    cd build/chipyard.TestHarness.TinyRocketConfig-ChipTop/par-rundir
     ./generated_scripts/open_chip -h
     "
         Usage: ./generated-scripts/open_chip [-t] [openroad_db_name]
@@ -215,7 +224,7 @@ These databases can be restored using the same ``open_chip`` script for debuggin
     # load post-clock tree database with timing inforamtion
     ./generated_scripts/open_chip -t post_clock_tree
 
-.. Timing reports are found in ``build/par-rundir/timingReports``. They are gzipped text files.
+Various reports, including timing reports, are found in ``build/par-rundir/reports``.
 
 See the `OpenROAD tool plugin <https://github.com/ucb-bar/hammer/blob/master/hammer/par/openroad>`__ for the full list of OpenROAD tool steps and their implementations.
 
@@ -232,9 +241,9 @@ To run DRC & LVS in Magic & Netgen, respectively:
 .. code-block:: shell
 
     make drc tutorial=sky130-openroad
-    ./build/drc-rundir/generated-scripts/view_drc
+    ./build/chipyard.TestHarness.TinyRocketConfig-ChipTop/drc-rundir/generated-scripts/view_drc
     make lvs tutorial=sky130-openroad
-    ./build/lvs-rundir/generated-scripts/view_lvs
+    ./build/chipyard.TestHarness.TinyRocketConfig-ChipTop/lvs-rundir/generated-scripts/view_lvs
 
 Note that in ``sky130-openroad.yml`` we have set the following YAML keys:
 

vlsi/example-asap7.yml

@@ -37,54 +37,47 @@ vlsi.inputs.placement_constraints:
       right: 0
       top: 0
       bottom: 0
-  - path: "ChipTop/system/tile_prci_domain/tile_reset_domain/tile/dcache/data/data_arrays_0/data_arrays_0_ext/mem_0_0"
+  - path: "ChipTop/system/tile_prci_domain/tile_reset_domain_tile/dcache/data/data_arrays_0/data_arrays_0_ext/mem_0_0"
     type: hardmacro
     x: 550
     y: 25
     orientation: "r0"
     top_layer: "M4"
     master: "SRAM1RW4096x8"
-  - path: "ChipTop/system/tile_prci_domain/tile_reset_domain/tile/dcache/data/data_arrays_0/data_arrays_0_ext/mem_0_1"
+  - path: "ChipTop/system/tile_prci_domain/tile_reset_domain_tile/dcache/data/data_arrays_0/data_arrays_0_ext/mem_0_1"
     type: hardmacro
     x: 550
     y: 270
     orientation: "r0"
     top_layer: "M4"
-  - path: "ChipTop/system/tile_prci_domain/tile_reset_domain/tile/dcache/data/data_arrays_0/data_arrays_0_ext/mem_0_2"
+  - path: "ChipTop/system/tile_prci_domain/tile_reset_domain_tile/dcache/data/data_arrays_0/data_arrays_0_ext/mem_0_2"
     type: hardmacro
     x: 675
     y: 25
     orientation: "r0"
     top_layer: "M4"
     master: "SRAM1RW4096x8"
-  - path: "ChipTop/system/tile_prci_domain/tile_reset_domain/tile/dcache/data/data_arrays_0/data_arrays_0_ext/mem_0_3"
+  - path: "ChipTop/system/tile_prci_domain/tile_reset_domain_tile/dcache/data/data_arrays_0/data_arrays_0_ext/mem_0_3"
     type: hardmacro
     x: 675
     y: 270
     orientation: "r0"
     top_layer: "M4"
     master: "SRAM1RW4096x8"
-  - path: "ChipTop/system/tile_prci_domain/tile_reset_domain/tile/frontend/icache/tag_array/tag_array_ext/mem_0_0"
+  - path: "ChipTop/system/tile_prci_domain/tile_reset_domain_tile/frontend/icache/tag_array_0/tag_array_0_ext/mem_0_0"
     type: hardmacro
     x: 125
     y: 150
     orientation: "my"
     top_layer: "M4"
     master: "SRAM1RW64x21"
-  - path: "ChipTop/system/tile_prci_domain/tile_reset_domain/tile/frontend/icache/data_arrays_0/data_arrays_0_0_ext/mem_0_0"
+  - path: "ChipTop/system/tile_prci_domain/tile_reset_domain_tile/frontend/icache/data_arrays_0_0/data_arrays_0_0_ext/mem_0_0"
     type: hardmacro
     x: 0
     y: 25
     orientation: "my"
     top_layer: "M4"
     master: "SRAM1RW1024x32"
-  - path: "ChipTop/system/tile_prci_domain/tile_reset_domain/tile/ptw/l2_tlb_ram/l2_tlb_ram_ext/mem_0_0"
-    type: hardmacro
-    x: 0
-    y: 260
-    orientation: "my"
-    top_layer: "M4"
-    master: "SRAM1RW1024x37"
 
 # Pin placement constraints
 vlsi.inputs.pin_mode: generated

vlsi/example-designs/sky130-commercial.yml

@@ -2,149 +2,18 @@
 
 # Specify clock signals
 vlsi.inputs.clocks: [
-  {name: "clock_clock", period: "5ns", uncertainty: "1ns"}
+  {name: "clock_clock", period: "30ns", uncertainty: "2ns"}
 ]
 
-# Power Straps
-par.power_straps_mode: generate
-par.generate_power_straps_method: by_tracks
-par.blockage_spacing: 40.0
-par.blockage_spacing_top_layer: met4
-par.generate_power_straps_options:
-  by_tracks:
-    strap_layers:
-      - met4
-      - met5
-    pin_layers:
-      - met5
-    blockage_spacing_met2: 4.0
-    blockage_spacing_met4: 2.0
-    track_width: 3
-    track_width_met5: 1
-    track_spacing: 5
-    track_start: 10
-    track_start_met5: 1
-    power_utilization: 0.1
-    power_utilization_met4: 0.1
-    power_utilization_met5: 0.1
-
 # Placement Constraints
-vlsi.inputs.placement_constraints:
+# If overriding the placement constraints in example-sky130.yml,
-  - path: "ChipTop"
+# ensure one of the toplevel margin sides corresponding with the power pin metal layers
-    type: toplevel
+# is set to 0 so that Innovus actually creates those pins (otherwise LVS will fail).
-    x: 0
+# For example, in example-sky130.yml we set 
-    y: 0
+#   par.generate_power_straps_options.by_tracks.pin_layers: 'met5'  # horizontal layer
-    width: 4000
+# therefore we must also set:
-    height: 2500
+#   vlsi.inputs.placement_constraints:
-    margins:
+#     - path: "ChipTop"
-      left: 0
+#       ...
-      right: 0
+#       margins:
-      top: 0
+#         right: 0  # or left: 0
-      bottom: 0
-
-  # Place data cache SRAM instances
-  - path: "ChipTop/system/tile_prci_domain/tile_reset_domain/tile/dcache/data/data_arrays_0/data_arrays_0_ext/mem_0_0"
-    type: hardmacro
-    x: 50
-    y: 100
-    orientation: r0
-
-  - path: "ChipTop/system/tile_prci_domain/tile_reset_domain/tile/dcache/data/data_arrays_0/data_arrays_0_ext/mem_1_0"
-    type: hardmacro
-    x: 50
-    y: 700
-    orientation: r0
-
-  - path: "ChipTop/system/tile_prci_domain/tile_reset_domain/tile/dcache/data/data_arrays_0/data_arrays_0_ext/mem_2_0"
-    type: hardmacro
-    x: 50
-    y: 1300
-    orientation: r0
-
-  - path: "ChipTop/system/tile_prci_domain/tile_reset_domain/tile/dcache/data/data_arrays_0/data_arrays_0_ext/mem_3_0"
-    type: hardmacro
-    x: 50
-    y: 1900
-    orientation: r0
-
-  - path: "ChipTop/system/tile_prci_domain/tile_reset_domain/tile/dcache/data/data_arrays_0/data_arrays_0_ext/mem_4_0"
-    type: hardmacro
-    x: 1000
-    y: 1900
-    orientation: r0
-
-
-  - path: "ChipTop/system/tile_prci_domain/tile_reset_domain/tile/dcache/data/data_arrays_0/data_arrays_0_ext/mem_5_0"
-    type: hardmacro
-    x: 1000
-    y: 1300
-    orientation: r0
-
-  - path: "ChipTop/system/tile_prci_domain/tile_reset_domain/tile/dcache/data/data_arrays_0/data_arrays_0_ext/mem_6_0"
-    type: hardmacro
-    x: 1000
-    y: 700
-    orientation: r0
-
-  - path: "ChipTop/system/tile_prci_domain/tile_reset_domain/tile/dcache/data/data_arrays_0/data_arrays_0_ext/mem_7_0"
-    type: hardmacro
-    x: 1000
-    y: 100
-    orientation: r0
-
-  # Place instruction cache SRAM instances
-  - path: "ChipTop/system/tile_prci_domain/tile_reset_domain/tile/frontend/icache/data_arrays_0/data_arrays_0_0_ext/mem_0_0"
-    type: hardmacro
-    x: 3250
-    y: 100
-    orientation: r0
-
-  - path: "ChipTop/system/tile_prci_domain/tile_reset_domain/tile/frontend/icache/data_arrays_0/data_arrays_0_0_ext/mem_1_0"
-    type: hardmacro
-    x: 3250
-    y: 700
-    orientation: r0
-
-  - path: "ChipTop/system/tile_prci_domain/tile_reset_domain/tile/frontend/icache/tag_array/tag_array_ext/mem_0_0"
-    type: hardmacro
-    x: 3450
-    y: 1300
-    orientation: r0
-
-  # Place L2 TLB SRAM instances
-  - path: "ChipTop/system/tile_prci_domain/tile_reset_domain/tile/ptw/l2_tlb_ram/l2_tlb_ram_ext/mem_0_0"
-    type: hardmacro
-    x: 2000
-    y: 1300
-    orientation: "r0"
-
-  - path: "ChipTop/system/tile_prci_domain/tile_reset_domain/tile/ptw/l2_tlb_ram/l2_tlb_ram_ext/mem_0_1"
-    type: hardmacro
-    x: 2000
-    y: 1900
-    orientation: "r0"
-
-  - path: "ChipTop/system/tile_prci_domain/tile_reset_domain/tile/ptw/l2_tlb_ram/l2_tlb_ram_ext/mem_0_2"
-    type: hardmacro
-    x: 2750
-    y: 1300
-    orientation: "r0"
-
-  - path: "ChipTop/system/tile_prci_domain/tile_reset_domain/tile/ptw/l2_tlb_ram/l2_tlb_ram_ext/mem_0_3"
-    type: hardmacro
-    x: 2750
-    y: 1900
-    orientation: "r0"
-
-  - path: "ChipTop/system/tile_prci_domain/tile_reset_domain/tile/ptw/l2_tlb_ram/l2_tlb_ram_ext/mem_0_4"
-    type: hardmacro
-    x: 3460
-    y: 1900
-    orientation: "r0"
-
-# Pin placement constraints
-vlsi.inputs.pin_mode: generated
-vlsi.inputs.pin.generate_mode: semi_auto
-vlsi.inputs.pin.assignments: [
-  {pins: "*", layers: ["met2", "met4"], side: "bottom"}
-]

vlsi/example-designs/sky130-openroad.yml

@@ -3,9 +3,42 @@
 # Specify clock signals
 # Relax the clock period for OpenROAD to meet timing
 vlsi.inputs.clocks: [
-  {name: "clock_clock", period: "30ns", uncertainty: "1ns"}
+  {name: "clock_clock", period: "50ns", uncertainty: "2ns"}
 ]
 
+# Flow parameters that yield a routable design with reasonable timing
+par.openroad:
+  timing_driven: true  # set to false to drastically speed up runs
+  create_archive_mode: none
+
+  write_reports: true  # set to false to slightly speed up runs
+
+  floorplan_mode: generate
+
+  macro_placement.halo: [50, 50]
+
+  global_placement.timing_driven: true
+  global_placement.routability_driven: true
+
+  global_placement.placement_padding: 6
+  detailed_placement.placement_padding: 4
+  clock_tree.placement_padding: 2
+  clock_tree_resize.placement_padding: 0
+
+  clock_tree_resize.setup_margin: 0.0
+  clock_tree_resize.hold_margin: 0.20
+  global_route_resize.hold_margin: 0.60
+  clock_tree_resize.hold_max_buffer_percent: 80  
+
+  global_placement.routing_adjustment: 0.5
+  global_route.routing_adjustment: 0.3
+  global_route_resize.routing_adjustment: 0.2
+
+# DRC/LVS configuration
+drc.magic.generate_only: true
+lvs.netgen.generate_only: true
+
+
 # Placement Constraints
 vlsi.inputs.placement_constraints:
   - path: "ChipTop"
@@ -13,78 +46,47 @@ vlsi.inputs.placement_constraints:
     x: 0
     y: 0
     width: 4000
-    height: 2500
+    height: 3000
     margins:
       left: 10
-      right: 10
+      right: 0
       top: 10
       bottom: 10
 
- # Place data cache SRAM instances
+  # Place SRAM memory instances
-  - path: "ChipTop/system.tile_prci_domain.tile_reset_domain.tile.dcache.data.data_arrays_0.data_arrays_0_ext.mem_0_0"
+  # SRAM paths and configurations are slightly different due to ENABLE_YOSYS_FLOW flag
+  # data cache
+  - path: "ChipTop/system/tile_prci_domain/tile_reset_domain_tile/dcache/data/data_arrays_0_0/data_arrays_0_0_ext/mem_0_0"
     type: hardmacro
     x: 50
-    y: 100
+    y: 50
-    orientation: r0
+    orientation: r90
-
+  - path: "ChipTop/system/tile_prci_domain/tile_reset_domain_tile/dcache/data/data_arrays_0_1/data_arrays_0_0_ext/mem_0_0"
-  - path: "ChipTop/system.tile_prci_domain.tile_reset_domain.tile.dcache.data.data_arrays_0.data_arrays_0_ext.mem_1_0"
     type: hardmacro
     x: 50
-    y: 700
+    y: 450
-    orientation: r0
+    orientation: r90
-
+  - path: "ChipTop/system/tile_prci_domain/tile_reset_domain_tile/dcache/data/data_arrays_0_2/data_arrays_0_0_ext/mem_0_0"
-  - path: "ChipTop/system.tile_prci_domain.tile_reset_domain.tile.dcache.data.data_arrays_0.data_arrays_0_ext.mem_2_0"
     type: hardmacro
     x: 50
-    y: 1300
+    y: 850
-    orientation: r0
+    orientation: r90
-
+  - path: "ChipTop/system/tile_prci_domain/tile_reset_domain_tile/dcache/data/data_arrays_0_3/data_arrays_0_0_ext/mem_0_0"
-  - path: "ChipTop/system.tile_prci_domain.tile_reset_domain.tile.dcache.data.data_arrays_0.data_arrays_0_ext.mem_3_0"
     type: hardmacro
     x: 50
-    y: 1900
+    y: 1250
-    orientation: r0
+    orientation: r90
  
-  - path: "ChipTop/system.tile_prci_domain.tile_reset_domain.tile.dcache.data.data_arrays_0.data_arrays_0_ext.mem_4_0"
+  # tag array
+  - path: "ChipTop/system/tile_prci_domain/tile_reset_domain_tile/frontend/icache/tag_array_0/tag_array_0_ext/mem_0_0"
     type: hardmacro
-    x: 1000
+    x: 50
-    y: 1900
+    y: 1600
-    orientation: r0
+    orientation: r90
 
-
+  # instruction cache
-  - path: "ChipTop/system.tile_prci_domain.tile_reset_domain.tile.dcache.data.data_arrays_0.data_arrays_0_ext.mem_5_0"
+  - path: "ChipTop/system/tile_prci_domain/tile_reset_domain_tile/frontend/icache/data_arrays_0_0/data_arrays_0_0_0_ext/mem_0_0"
     type: hardmacro
-    x: 1000
+    x: 50
-    y: 1300
+    y: 2100
-    orientation: r0
+    orientation: r90
-
-  - path: "ChipTop/system.tile_prci_domain.tile_reset_domain.tile.dcache.data.data_arrays_0.data_arrays_0_ext.mem_6_0"
-    type: hardmacro
-    x: 1000
-    y: 700
-    orientation: r0
-
-  - path: "ChipTop/system.tile_prci_domain.tile_reset_domain.tile.dcache.data.data_arrays_0.data_arrays_0_ext.mem_7_0"
-    type: hardmacro
-    x: 1000
-    y: 100
-    orientation: r0
-
-  # Place instruction cache SRAM instances
-  - path: "ChipTop/system.tile_prci_domain.tile_reset_domain.tile.frontend.icache.data_arrays_0.data_arrays_0_0_ext.mem_0_0"
-    type: hardmacro
-    x: 3250
-    y: 100
-    orientation: r0
-
-  - path: "ChipTop/system.tile_prci_domain.tile_reset_domain.tile.frontend.icache.data_arrays_0.data_arrays_0_0_ext.mem_1_0"
-    type: hardmacro
-    x: 3250
-    y: 700
-    orientation: r0
-
-  - path: "ChipTop/system.tile_prci_domain.tile_reset_domain.tile.frontend.icache.tag_array.tag_array_ext.mem_0_0"
-    type: hardmacro
-    x: 3450
-    y: 1300
-    orientation: r0

vlsi/example-sky130.yml

@@ -20,31 +20,55 @@ vlsi.inputs.power_spec_type: "cpf"
 
 # Specify clock signals
 vlsi.inputs.clocks: [
-  {name: "clock_clock", period: "10ns", uncertainty: "1ns"}
+  {name: "clock_clock", period: "20ns", uncertainty: "1ns"}
 ]
 
 # Generate Make include to aid in flow
 vlsi.core.build_system: make
 
+
 # Placement Constraints
 vlsi.inputs.placement_constraints:
   - path: "ChipTop"
     type: toplevel
     x: 0
     y: 0
-    width: 3500
+    width: 4000
-    height: 2500
+    height: 3000
     margins:
       left: 10
-      right: 10
+      right: 0
       top: 10
       bottom: 10
 
+  # Place SRAM memory instances
+    # data cache
+  - path: "ChipTop/system/tile_prci_domain/tile_reset_domain_tile/dcache/data/data_arrays_0/data_arrays_0_ext/mem_0_0"
+    type: hardmacro
+    x: 50
+    y: 50
+    orientation: r90
+
+  # tag array
+  - path: "ChipTop/system/tile_prci_domain/tile_reset_domain_tile/frontend/icache/tag_array_0/tag_array_0_ext/mem_0_0"
+    type: hardmacro
+    x: 50
+    y: 1600
+    orientation: r90
+
+  # instruction cache
+  - path: "ChipTop/system/tile_prci_domain/tile_reset_domain_tile/frontend/icache/data_arrays_0_0/data_arrays_0_0_ext/mem_0_0"
+    type: hardmacro
+    x: 50
+    y: 2100
+    orientation: r90
+
+
 # Power Straps
 par.power_straps_mode: generate
 par.generate_power_straps_method: by_tracks
-par.blockage_spacing: 40.0
+par.blockage_spacing: 2.0
-par.blockage_spacing_top_layer: met4
+par.blockage_spacing_top_layer: met3
 par.generate_power_straps_options:
   by_tracks:
     strap_layers:
@@ -63,6 +87,7 @@ par.generate_power_straps_options:
     power_utilization_met4: 0.1
     power_utilization_met5: 0.1
 
+
 # Pin placement constraints
 vlsi.inputs.pin_mode: generated
 vlsi.inputs.pin.generate_mode: semi_auto
@@ -70,5 +95,6 @@ vlsi.inputs.pin.assignments: [
   {pins: "*", layers: ["met2", "met4"], side: "bottom"}
 ]
 
+
 # SRAM Compiler compiler options
 vlsi.core.sram_generator_tool: "hammer.technology.sky130.sram_compiler"

vlsi/tutorial.mk

@@ -1,10 +1,7 @@
 #########################################################################################
 # makefile variables for Hammer tutorials
 #########################################################################################
-# tutorial ?= none
+tutorial ?= none
-tutorial ?= sky130-openroad
-
-extra ?=
 
 # TODO: eventually have asap7 commercial/openroad tutorial flavors
 ifeq ($(tutorial),asap7)
@@ -39,5 +36,3 @@ ifeq ($(tutorial),sky130-openroad)
     # Yosys compatibility for CIRCT-generated Verilog, at the expense of elaboration time.
     ENABLE_YOSYS_FLOW  = 1
 endif
-
-HAMMER_EXTRA_ARGS      ?= -p $(TOOLS_CONF) -p $(TECH_CONF) -p $(DESIGN_CONF) $(extra)