upf模板，来自synopsys rm golden.upf

create_power_domain {TOP}没有指定-elements和-include_scope。意义是默认所有elements属于TOP power domain，除非后续有单独的create_power_domain -elements命令设置。
关断电源，有两种方案：

芯片输出gpio管脚，控制PCB板，把电源关断。注意内部iso enable控制流程。
内部power switch cell，实现芯片内关断。
相比芯片外和芯片内关断方案，芯片外关断，具有电源关断更彻底，不需要芯片增加power switch cell，但是占用一个GPIO管脚等特点。

加ISO cell，有手动RTL和综合自动两种方案：

推荐手动RTL添加ISO cell，因为钳位信号，可以灵活处理。

关断后数据保留，有两种方案：

retention register。
软件方案，把需要保留的数据，存储在常开区。优点是不需要retention register cell，缺点是需要软件实现数据保留的过程。

#################################################################################
#################################################################################
# Example 2: UPF using domain dependent supply nets.
#################################################################################
################################################################################### Create Power Domains
#######################
# Power Domains
create_power_domain {TOP}
create_power_domain {LEON3_p0}   -elements {u0_0/pd_switchable}
create_power_domain {LEON3_p1}   -elements {u0_1/pd_switchable}
create_power_domain {LEON3_p2}   -elements {u0_2/pd_switchable}
create_power_domain {LEON3_p3}   -elements {u0_3/pd_switchable}
create_power_domain {LEON3_misc} -elements {u_m/u_m_pd}## Power Supply Network
#######################
# Top Level Domain at 1.08V
create_supply_port {VDD}
create_supply_net  {VDD} -domain {TOP}
create_supply_net  {VDD} -domain {LEON3_misc} -reuse# Processors u0_0 and u0_1 are high performance and need to operate at 1.08V
create_supply_net {VDD} -domain {LEON3_p0} -reuse
create_supply_net {VDD} -domain {LEON3_p1} -reuse
create_supply_net {VDD} -domain {LEON3_p2} -reuse
create_supply_net {VDD} -domain {LEON3_p3} -reuseconnect_supply_net {VDD} -ports {VDD}# Top level Low Voltage Port at 0.9V
create_supply_port {VDD_LOW}
create_supply_net  {VDD_LOW} -domain {TOP}# Processors u0_2 and u0_3 are low performance and need to operate at 0.9V
create_supply_net  {VDD_LOW} -domain {LEON3_p2} -reuse
create_supply_net  {VDD_LOW} -domain {LEON3_p3} -reuse
connect_supply_net {VDD_LOW} -ports  {VDD_LOW}# Create Ground Nets
create_supply_port {VSS}create_supply_net {VSS} -domain {TOP}
create_supply_net {VSS} -domain {LEON3_p0}   -reuse
create_supply_net {VSS} -domain {LEON3_p1}   -reuse
create_supply_net {VSS} -domain {LEON3_p2}   -reuse
create_supply_net {VSS} -domain {LEON3_p3}   -reuse
create_supply_net {VSS} -domain {LEON3_misc} -reuseconnect_supply_net {VSS} -ports {VSS}# power Nets for the different domains
create_supply_net {VDDS_p0}   -domain {LEON3_p0}
create_supply_net {VDDS_p1}   -domain {LEON3_p1}
create_supply_net {VDDS_misc} -domain {LEON3_misc}create_supply_net {VDD_LOWS_p2} -domain {LEON3_p2}
create_supply_net {VDD_LOWS_p3} -domain {LEON3_p3}## Setting Power Domain's Primary Supply Nets
#############################################
# Specify the Primary Supply
set_domain_supply_net {TOP}        -primary_power_net {VDD}         -primary_ground_net {VSS}
set_domain_supply_net {LEON3_p0}   -primary_power_net {VDDS_p0}     -primary_ground_net {VSS}
set_domain_supply_net {LEON3_p1}   -primary_power_net {VDDS_p1}     -primary_ground_net {VSS}
set_domain_supply_net {LEON3_misc} -primary_power_net {VDDS_misc}   -primary_ground_net {VSS}
set_domain_supply_net {LEON3_p2}   -primary_power_net {VDD_LOWS_p2} -primary_ground_net {VSS}
set_domain_supply_net {LEON3_p3}   -primary_power_net {VDD_LOWS_p3} -primary_ground_net {VSS}## Power Definition for Power Domain u0_0/LEON3_p0
##################################################
# Create Power Switch
create_power_switch {leon3_p0_sw}                              \-domain             {LEON3_p0}                               \-input_supply_port  {in VDD}                                 \-output_supply_port {out VDDS_p0}                            \-control_port       {p0_sd u_m/u_power_controller_top/p0_sd} \-on_state           {p0_on_state in {!p0_sd}}# Define Isolation Constraints
set_isolation {leon3_p0_iso_out}     \-domain               {LEON3_p0}  \-isolation_power_net  {VDD}       \-isolation_ground_net {VSS}       \-clamp_value          1           \-applies_to           outputsset_isolation_control {leon3_p0_iso_out}                        \-domain            {LEON3_p0}                                \-isolation_signal  {u_m/u_power_controller_top/p0_isolation} \-isolation_sense   high                                      \-location          parent## Power Definition for Power Domain u0_1/LEON3_p1
##################################################
# Create Power Switch
create_power_switch {leon3_p1_sw}                              \-domain             {LEON3_p1}                               \-input_supply_port  {in VDD}                                 \-output_supply_port {out VDDS_p1}                            \-control_port       {p1_sd u_m/u_power_controller_top/p1_sd} \-on_state           {p1_on_state in {!p1_sd}}# Define Isolation Constraints
set_isolation {leon3_p1_iso_out}     \-domain               {LEON3_p1}  \-isolation_power_net  {VDD}       \-isolation_ground_net {VSS}       \-clamp_value          1           \-applies_to           outputsset_isolation_control {leon3_p1_iso_out}                        \-domain           {LEON3_p1}                                 \-isolation_signal {u_m/u_power_controller_top/p1_isolation}  \-isolation_sense  high                                       \-location         self## Power Definition for Power Domain u0_2/LEON3_p2
##################################################
# Create Power Switch
create_power_switch {leon3_p2_sw}                               \-domain             {LEON3_p2}                                \-input_supply_port  {in VDD_LOW}                              \-output_supply_port {out VDD_LOWS_p2}                         \-control_port       {p2_sd u_m/u_power_controller_top/p2_sd}  \-on_state           {p2_on_state in {!p2_sd}}# Define Isolation Constraints
set_isolation {leon3_p2_iso_out}      \-domain                {LEON3_p2}  \-isolation_power_net   {VDD_LOW}   \-isolation_ground_net  {VSS}       \-clamp_value           1           \-applies_to            outputsset_isolation_control {leon3_p2_iso_out}                        \-domain           {LEON3_p2}                                 \-isolation_signal {u_m/u_power_controller_top/p2_isolation}  \-isolation_sense  high                                       \-location         parent# Set the level shifter strategy based on LS available in the Library
set_level_shifter -domain {LEON3_p2} -applies_to inputs  -location self   {u0_2_ls_in}
set_level_shifter -domain {LEON3_p2} -applies_to outputs -location parent {u0_2_ls_out}## Power Definition for Power Domain u0_3/LEON3_p3
##################################################
# Create Power Switch
create_power_switch {leon3_p3_sw}                               \-domain             {LEON3_p3}                                \-input_supply_port  {in VDD_LOW}                              \-output_supply_port {out VDD_LOWS_p3}                         \-control_port       {p3_sd u_m/u_power_controller_top/p3_sd}  \-on_state           {p3_on_state in {!p3_sd}}# Define Isolation Constraints
set_isolation {leon3_p3_iso_out}      \-domain               {LEON3_p3}   \-isolation_power_net  {VDD_LOW}    \-isolation_ground_net {VSS}        \-clamp_value          1            \-applies_to           outputsset_isolation_control {leon3_p3_iso_out}                        \-domain           {LEON3_p3}                                 \-isolation_signal {u_m/u_power_controller_top/p3_isolation}  \-isolation_sense  high                                       \-location         self# Set the level shifter strategy based on LS available in the Library
set_level_shifter -domain {LEON3_p3} -applies_to inputs  -location self   {u0_3_ls_in}
set_level_shifter -domain {LEON3_p3} -applies_to outputs -location parent {u0_3_ls_out}## Power Definition for Power Domain LEON3_misc
###############################################
# Create Power Switch
create_power_switch {leon3_misc_sw}                               \-domain             {LEON3_misc}                                \-input_supply_port  {in VDD}                                    \-output_supply_port {out VDDS_misc}                             \-control_port       {all_sd u_m/u_power_controller_top/all_sd}  \-on_state           {misc_on_state in {!all_sd}}# Define Isolation Constraints
set_isolation {leon3_misc_iso_out}     \-domain               {LEON3_misc}  \-isolation_power_net  {VDD}         \-isolation_ground_net {VSS}         \-clamp_value          1             \-applies_to           outputsset_isolation_control {leon3_misc_iso_out}                       \-domain           {LEON3_misc}                                \-isolation_signal {u_m/u_power_controller_top/all_isolation}  \-isolation_sense  high                                        \-location         self# Define Retention Register Constraint
set_retention {misc_ret} -domain {LEON3_misc} -retention_power_net {VDD} -retention_ground_net {VSS}set_retention_control {misc_ret}                                \-domain         {LEON3_misc}                                 \-save_signal    {u_m/u_power_controller_top/all_save high}   \-restore_signal {u_m/u_power_controller_top/all_restore low}map_retention_cell {misc_ret}                  \-domain {LEON3_misc}                        \-lib_cells {RDFFSRX1      RDFFSRASRX1       \RSDFFSRX1     RSDFFSRASRX1      \RDFFSRX2      RDFFSRASRX2       \RSDFFSRX2     RSDFFSRASRX2      \RDFFSRX1_HVT  RDFFSRASRX1_HVT   \RSDFFSRX1_HVT RSDFFSRASRX1_HVT  \RDFFSRX2_HVT  RDFFSRASRX2_HVT   \RSDFFSRX2_HVT RSDFFSRASRX2_HVT  \RDFFSRX1_LVT  RDFFSRASRX1_LVT   \RSDFFSRX1_LVT RSDFFSRASRX1_LVT  \RDFFSRX2_LVT  RDFFSRASRX2_LVT   \RSDFFSRX2_LVT RSDFFSRASRX2_LVT  } ## Define Port State for each Domain
####################################
add_port_state {VDD}     -state {TOP_HV 1.08}
add_port_state {VDD_LOW} -state {TOP_LV 0.7}
add_port_state {VSS}     -state {GND 0.0}add_port_state {leon3_p0_sw/out}   -state {P0_HV 1.08}    -state {P0_OFF off}
add_port_state {leon3_p1_sw/out}   -state {P1_HV 1.08}    -state {P1_OFF off}
add_port_state {leon3_p2_sw/out}   -state {P2_LV 0.7}     -state {P2_OFF off}
add_port_state {leon3_p3_sw/out}   -state {P3_LV 0.7}     -state {P3_OFF off}
add_port_state {leon3_misc_sw/out} -state {MISC_HV 1.08}  -state {MISC_OFF off}## Define the Port State Table for the Entire System
####################################################
create_pst {LEON3_MP_PST}                      -supplies {VDD    VDD_LOW  VDDS_p0  VDDS_p1  VDD_LOWS_p2  VDD_LOWS_p3  VDDS_misc  VSS}add_pst_state {INIT}          -pst {LEON3_MP_PST} -state {TOP_HV  TOP_LV  P0_OFF   P1_OFF   P2_OFF       P3_OFF       MISC_OFF   GND}
add_pst_state {P0_BOOT}       -pst {LEON3_MP_PST} -state {TOP_HV  TOP_LV  P0_HV    P1_OFF   P2_OFF       P3_OFF       MISC_OFF   GND}
add_pst_state {P0_P1_BOOT}    -pst {LEON3_MP_PST} -state {TOP_HV  TOP_LV  P0_HV    P1_HV    P2_OFF       P3_OFF       MISC_OFF   GND}
add_pst_state {P0_P1_P3_BOOT} -pst {LEON3_MP_PST} -state {TOP_HV  TOP_LV  P0_HV    P1_HV    P2_LV        P3_OFF       MISC_OFF   GND}
add_pst_state {ALL_ON}        -pst {LEON3_MP_PST} -state {TOP_HV  TOP_LV  P0_HV    P1_HV    P2_LV        P3_LV        MISC_HV    GND}
add_pst_state {HIGH_PERF}     -pst {LEON3_MP_PST} -state {TOP_HV  TOP_LV  P0_HV    P1_HV    P2_OFF       P3_OFF       MISC_HV    GND}
add_pst_state {LOW_PERF}      -pst {LEON3_MP_PST} -state {TOP_HV  TOP_LV  P0_OFF   P1_OFF   P2_LV        P3_LV        MISC_HV    GND}
add_pst_state {P3_DROWSY}     -pst {LEON3_MP_PST} -state {TOP_HV  TOP_LV  P0_OFF   P1_OFF   P2_OFF       P3_LV        MISC_HV    GND}
add_pst_state {P2_DROWSY}     -pst {LEON3_MP_PST} -state {TOP_HV  TOP_LV  P0_OFF   P1_OFF   P2_LV        P3_OFF       MISC_HV    GND}
add_pst_state {P1_DROWSY}     -pst {LEON3_MP_PST} -state {TOP_HV  TOP_LV  P0_HV    P1_OFF   P2_OFF       P3_LV        MISC_HV    GND}
add_pst_state {P0_DROWSY}     -pst {LEON3_MP_PST} -state {TOP_HV  TOP_LV  P0_OFF   P1_HV    P2_OFF       P3_LV        MISC_HV    GND}
add_pst_state {ULTRA_DROWSY}  -pst {LEON3_MP_PST} -state {TOP_HV  TOP_LV  P0_OFF   P1_HV    P2_OFF       P3_OFF       MISC_OFF   GND}set_port_attributes -elements { . } -attribute related_supply_default_primary true

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upf模板，来自synopsys rm golden.upf

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