Merge pull request #2805 from The-OpenROAD-Project-staging/ihp-ir-drop

ihp: enable IR-drop analysis

Author: maliberty

flow/designs/gf180/uart-blocks/uart_rx/config.mk

@@ -11,7 +11,7 @@ export CORE_ASPECT_RATIO      = 1
 export CORE_MARGIN            = 2
 export PLACE_DENSITY          = 0.60
 
-export PDN_TCL = $(DESIGN_HOME)/$(PLATFORM)/uart-blocks/BLOCKS_grid_strategy.tcl
+export PDN_TCL = $(DESIGN_HOME)/$(PLATFORM)/uart-blocks/uart_rx/pdn.tcl
 
 export PLACE_PINS_ARGS    = -exclude bottom:* -exclude top:* -exclude right:*
 

flow/designs/gf180/uart-blocks/uart_rx/pdn.tcl

@@ -0,0 +1,24 @@
+####################################
+# global connections
+####################################
+add_global_connection -net {VDD} -inst_pattern {.*} -pin_pattern {^VDD$} -power
+add_global_connection -net {VDD} -inst_pattern {.*} -pin_pattern {^VDDPE$}
+add_global_connection -net {VDD} -inst_pattern {.*} -pin_pattern {^VDDCE$}
+add_global_connection -net {VDD} -inst_pattern {.*} -pin_pattern {^VDDP$}
+add_global_connection -net {VDD} -inst_pattern {.*} -pin_pattern {^VDDC$}
+add_global_connection -net {VDD} -inst_pattern {.*} -pin_pattern {^VNW$}
+add_global_connection -net {VSS} -inst_pattern {.*} -pin_pattern {^VSS$} -ground
+add_global_connection -net {VSS} -inst_pattern {.*} -pin_pattern {^VSSE$}
+add_global_connection -net {VSS} -inst_pattern {.*} -pin_pattern {^VSSC$}
+add_global_connection -net {VSS} -inst_pattern {.*} -pin_pattern {^VPW$}
+####################################
+# voltage domains
+####################################
+set_voltage_domain -name {CORE} -power {VDD} -ground {VSS}
+####################################
+# standard cell grid
+####################################
+define_pdn_grid -name {block} -voltage_domains {CORE} 
+add_pdn_stripe -grid {block} -layer {Metal1} -width {0.900} -pitch {5.040} -offset {0} -followpins
+add_pdn_stripe -grid {block} -layer {Metal4} -width {4.480} -spacing {0.56} -pitch {44.8} -offset {22.4}
+add_pdn_connect -grid {block} -layers {Metal1 Metal4}

flow/platforms/gf180/config.mk

@@ -120,20 +120,29 @@ export RCX_RC_CORNER                          = $($(CORNER)_RCX_RC_CORNER)
 #----------------------------------------------------------------------------------------------------
 export BC_LIB_FILES                           = $(abspath $(PLATFORM_DIR)/lib/gf180mcu_fd_sc_mcu$(TRACK_OPTION)$(POWER_OPTION)__ff_n40C_5v50.lib.gz)
 export BC_TEMPERATURE                         = -40c
+export BC_VOLTAGE                             = 5.5
 
 export WC_LIB_FILES                           = $(abspath $(PLATFORM_DIR)/lib/gf180mcu_fd_sc_mcu$(TRACK_OPTION)$(POWER_OPTION)__ss_125C_4v50.lib.gz)
 export WC_TEMPERATURE                         = 125c
+export WC_VOLTAGE                             = 4.5
 
 export TC_LIB_FILES                           = $(abspath $(PLATFORM_DIR)/lib/gf180mcu_fd_sc_mcu$(TRACK_OPTION)$(POWER_OPTION)__tt_025C_5v00.lib.gz)
 export TC_TEMPERATURE                         = 25c
+export TC_VOLTAGE                             = 5.0
 
 # ----------------------------------------------------------------------------------------------------
 # now, set files from user setting CORNER
 # ----------------------------------------------------------------------------------------------------
 export TEMPERATURE                           = $($(CORNER)_TEMPERATURE)
+export VOLTAGE                               = $($(CORNER)_VOLTAGE)
 export LIB_FILES                             = $($(CORNER)_LIB_FILES) \
                                                $(ADDITIONAL_LIBS)
 
+# IR drop estimation supply net name to be analyzed and supply voltage variable
+export PWR_NETS_VOLTAGES  ?= VDD $(VOLTAGE)
+export GND_NETS_VOLTAGES  ?= VSS 0.0
+export IR_DROP_LAYER ?= Metal1
+
 # For proprietary tool enablements that are not public
 export GF180_PRIVATE_DIR ?= ../../gf180-private
 -include $(GF180_PRIVATE_DIR)/private.mk