[cfg] Add PMP parameters to ibex_config.yaml

Also renames configs as part of this as they start to get unweildy if
all features get described in the config name.

Makefile

@@ -1,4 +1,4 @@
-IBEX_CONFIG ?= small-3cmult
+IBEX_CONFIG ?= small
 
 FUSESOC_CONFIG_OPTS = $(shell ./util/ibex_config.py $(IBEX_CONFIG) fusesoc_opts)
 

azure-pipelines.yml

@@ -154,6 +154,6 @@ jobs:
   - template : ci/ibex-rtl-ci-steps.yml
     parameters:
       ibex_configs:
-        - small-3cmult
+        - small
-        - experimental-maxperf-1cmult
+        - experimental-maxperf-pmp
-        - experimental-maxperf-bm-1cmult
+        - experimental-maxperf-pmp-bm

dv/riscv_compliance/ibex_riscv_compliance.core

@@ -28,32 +28,60 @@ parameters:
     datatype: int
     paramtype: vlogparam
     default: 1
-    description: Enable the M ISA extension (hardware multiply/divide)
+    description: "Enable the M ISA extension (hardware multiply/divide) [0/1]"
+
   RV32E:
     datatype: int
     paramtype: vlogparam
     default: 0
-    description: Enable the E ISA extension (reduced register set)
+    description: "Enable the E ISA extension (reduced register set) [0/1]"
+
   RV32B:
     datatype: int
     paramtype: vlogparam
     default: 0
-    description: Enable the B ISA extension (bit manipulation EXPERIMENTAL)
+    description: "Enable the B ISA extension (bit manipulation EXPERIMENTAL) [0/1]"
+
+  SRAM_INIT_FILE:
+    datatype: str
+    paramtype: vlogdefine
+    description: "Path to a vmem file to initialize the RAM with"
+
   MultiplierImplementation:
     datatype: str
     paramtype: vlogparam
     description: "Multiplier implementation. Valid values: fast, slow, single-cycle"
     default: "fast"
+
   BranchTargetALU:
     datatype: int
     paramtype: vlogparam
     default: 0
-    description: Enables seperate branch target ALU (increasing branch performance EXPERIMENTAL)
+    description: "Enables seperate branch target ALU (increasing branch performance EXPERIMENTAL)"
+
   WritebackStage:
     datatype: int
     paramtype: vlogparam
     default: 0
-    description: Enables third pipeline stage (EXPERIMENTAL)
+    description: "Enables third pipeline stage (EXPERIMENTAL)"
+
+  PMPEnable:
+    datatype: int
+    default: 0
+    paramtype: vlogparam
+    description: "Enable PMP"
+
+  PMPGranularity:
+    datatype: int
+    default: 0
+    paramtype: vlogparam
+    description: "Granularity of NAPOT range, 0 = 4 byte, 1 = byte, 2 = 16 byte, 3 = 32 byte etc"
+
+  PMPNumRegions:
+    datatype: int
+    default: 0
+    paramtype: vlogparam
+    description: "Number of PMP regions"
 
 targets:
   sim:
@@ -68,6 +96,9 @@ targets:
       - MultiplierImplementation
       - BranchTargetALU
       - WritebackStage
+      - PMPEnable
+      - PMPGranularity
+      - PMPNumRegions
     toplevel: ibex_riscv_compliance
     tools:
       verilator:

dv/riscv_compliance/rtl/ibex_riscv_compliance.sv

@@ -15,6 +15,9 @@ module ibex_riscv_compliance (
   input IO_RST_N
 );
 
+  parameter bit          PMPEnable       = 1'b0;
+  parameter int unsigned PMPGranularity  = 0;
+  parameter int unsigned PMPNumRegions   = 4;
   parameter bit RV32E                    = 1'b0;
   parameter bit RV32M                    = 1'b1;
   parameter bit RV32B                    = 1'b0;
@@ -105,14 +108,17 @@ module ibex_riscv_compliance (
   );
 
   ibex_core_tracing #(
-      .DmHaltAddr(32'h00000000),
+      .PMPEnable                (PMPEnable               ),
-      .DmExceptionAddr(32'h00000000),
+      .PMPGranularity           (PMPGranularity          ),
+      .PMPNumRegions            (PMPNumRegions           ),
       .RV32E                    (RV32E                   ),
       .RV32M                    (RV32M                   ),
       .RV32B                    (RV32B                   ),
       .MultiplierImplementation (MultiplierImplementation),
       .BranchTargetALU          (BranchTargetALU         ),
-      .WritebackStage(WritebackStage)
+      .WritebackStage           (WritebackStage          ),
+      .DmHaltAddr               (32'h00000000            ),
+      .DmExceptionAddr          (32'h00000000            )
     ) u_core (
       .clk_i          (clk_sys           ),
       .rst_ni         (rst_sys_n         ),

examples/simple_system/ibex_simple_system.core

@@ -27,36 +27,60 @@ parameters:
     datatype: int
     paramtype: vlogparam
     default: 1
-    description: Enable the M ISA extension (hardware multiply/divide) [0/1]
+    description: "Enable the M ISA extension (hardware multiply/divide) [0/1]"
+
   RV32E:
     datatype: int
     paramtype: vlogparam
     default: 0
-    description: Enable the E ISA extension (reduced register set) [0/1]
+    description: "Enable the E ISA extension (reduced register set) [0/1]"
+
   RV32B:
     datatype: int
     paramtype: vlogparam
     default: 0
-    description: Enable the B ISA extension (bit manipulation EXPERIMENTAL) [0/1]
+    description: "Enable the B ISA extension (bit manipulation EXPERIMENTAL) [0/1]"
+
   SRAM_INIT_FILE:
     datatype: str
     paramtype: vlogdefine
-    description: Path to a vmem file to initialize the RAM with
+    description: "Path to a vmem file to initialize the RAM with"
+
   MultiplierImplementation:
     datatype: str
     paramtype: vlogparam
     description: "Multiplier implementation. Valid values: fast, slow, single-cycle"
     default: "fast"
+
   BranchTargetALU:
     datatype: int
     paramtype: vlogparam
     default: 0
-    description: Enables seperate branch target ALU (increasing branch performance EXPERIMENTAL)
+    description: "Enables seperate branch target ALU (increasing branch performance EXPERIMENTAL)"
+
   WritebackStage:
     datatype: int
     paramtype: vlogparam
     default: 0
-    description: Enables third pipeline stage (EXPERIMENTAL)
+    description: "Enables third pipeline stage (EXPERIMENTAL)"
+
+  PMPEnable:
+    datatype: int
+    default: 0
+    paramtype: vlogparam
+    description: "Enable PMP"
+
+  PMPGranularity:
+    datatype: int
+    default: 0
+    paramtype: vlogparam
+    description: "Granularity of NAPOT range, 0 = 4 byte, 1 = byte, 2 = 16 byte, 3 = 32 byte etc"
+
+  PMPNumRegions:
+    datatype: int
+    default: 0
+    paramtype: vlogparam
+    description: "Number of PMP regions"
 
 targets:
   sim:
@@ -71,6 +95,9 @@ targets:
       - MultiplierImplementation
       - BranchTargetALU
       - WritebackStage
+      - PMPEnable
+      - PMPGranularity
+      - PMPNumRegions
       - SRAM_INIT_FILE
     toplevel: ibex_simple_system
     tools:

examples/simple_system/rtl/ibex_simple_system.sv

@@ -19,6 +19,9 @@ module ibex_simple_system (
   input IO_RST_N
 );
 
+  parameter bit          PMPEnable       = 1'b0;
+  parameter int unsigned PMPGranularity  = 0;
+  parameter int unsigned PMPNumRegions   = 4;
   parameter bit RV32E                    = 1'b0;
   parameter bit RV32M                    = 1'b1;
   parameter bit RV32B                    = 1'b0;
@@ -138,15 +141,18 @@ module ibex_simple_system (
   );
 
   ibex_core_tracing #(
+      .PMPEnable                ( PMPEnable                ),
+      .PMPGranularity           ( PMPGranularity           ),
+      .PMPNumRegions            ( PMPNumRegions            ),
       .MHPMCounterNum           ( 29                       ),
-      .DmHaltAddr               ( 32'h00100000             ),
-      .DmExceptionAddr          ( 32'h00100000             ),
       .RV32E                    ( RV32E                    ),
       .RV32M                    ( RV32M                    ),
       .RV32B                    ( RV32B                    ),
       .BranchTargetALU          ( BranchTargetALU          ),
       .WritebackStage           ( WritebackStage           ),
-      .MultiplierImplementation ( MultiplierImplementation )
+      .MultiplierImplementation ( MultiplierImplementation ),
+      .DmHaltAddr               ( 32'h00100000             ),
+      .DmExceptionAddr          ( 32'h00100000             )
     ) u_core (
       .clk_i                 (clk_sys),
       .rst_ni                (rst_sys_n),

ibex_configs.yaml

@@ -7,13 +7,16 @@
 
 # Two-stage pipeline without additional branch target ALU and 3 cycle multiplier
 # (4 cycles for mulh), resulting in 2 stall cycles for mul (3 for mulh)
-small-3cmult:
+small:
   RV32E                    : 0
   RV32M                    : 1
   RV32B                    : 0
   BranchTargetALU          : 0
   WritebackStage           : 0
   MultiplierImplementation : "fast"
+  PMPEnable                : 0
+  PMPGranularity           : 0
+  PMPNumRegions            : 4
 
 # ===============================
 # * EXPERIMENTAL CONFIGURATIONS *
@@ -21,20 +24,26 @@ small-3cmult:
 
 # Three-stage pipeline with additional branch traget ALU and 1 cycle multiplier
 # (2 cycles for mulh) so mul does not stall (mulh stall 1 cycles). This is the
-# maximum performance configuration.
+# maximum performance configuration. PMP is enabled with 16 regions.
-experimental-maxperf-1cmult:
+experimental-maxperf-pmp:
   RV32E                    : 0
   RV32M                    : 1
   RV32B                    : 0
   BranchTargetALU          : 1
   WritebackStage           : 1
   MultiplierImplementation : "single-cycle"
+  PMPEnable                : 1
+  PMPGranularity           : 0
+  PMPNumRegions            : 16
 
-# maxpref-1cmult config above with bitmanip extension
+# experimental-maxperf-pmp config above with bitmanip extension
-experimental-maxperf-bm-1cmult:
+experimental-maxperf-pmp-bm:
   RV32E                    : 0
   RV32M                    : 1
   RV32B                    : 1
   BranchTargetALU          : 1
   WritebackStage           : 1
   MultiplierImplementation : "single-cycle"
+  PMPEnable                : 1
+  PMPGranularity           : 0
+  PMPNumRegions            : 16

ibex_core.core

@@ -108,6 +108,24 @@ parameters:
     paramtype: vlogparam
     description: "Enables security hardening features (EXPERIMENTAL) [0/1]"
 
+  PMPEnable:
+    datatype: int
+    default: 0
+    paramtype: vlogparam
+    description: "Enable PMP"
+
+  PMPGranularity:
+    datatype: int
+    default: 0
+    paramtype: vlogparam
+    description: "Granularity of NAPOT range, 0 = 4 byte, 1 = byte, 2 = 16 byte, 3 = 32 byte etc"
+
+  PMPNumRegions:
+    datatype: int
+    default: 0
+    paramtype: vlogparam
+    description: "Number of PMP regions"
+
 targets:
   default:
     filesets:

ibex_core_tracing.core

@@ -83,6 +83,24 @@ parameters:
     paramtype: vlogparam
     description: "Enables security hardening features (EXPERIMENTAL) [0/1]"
 
+  PMPEnable:
+    datatype: int
+    default: 0
+    paramtype: vlogparam
+    description: "Enable PMP"
+
+  PMPGranularity:
+    datatype: int
+    default: 0
+    paramtype: vlogparam
+    description: "Granularity of NAPOT range, 0 = 4 byte, 1 = byte, 2 = 16 byte, 3 = 32 byte etc"
+
+  PMPNumRegions:
+    datatype: int
+    default: 0
+    paramtype: vlogparam
+    description: "Number of PMP regions"
+
 targets:
   default:
     filesets:
@@ -108,6 +126,9 @@ targets:
       - WritebackStage
       - MultiplierImplementation
       - SecureIbex
+      - PMPEnable
+      - PMPGranularity
+      - PMPNumRegions
     default_tool: verilator
     toplevel: ibex_core_tracing
     tools:

lint/verilator_waiver.vlt

@@ -20,6 +20,7 @@ lint_off -rule WIDTH -file "*/rtl/ibex_core_tracing.sv" -match "*'RV32B'*"
 lint_off -rule WIDTH -file "*/rtl/ibex_core_tracing.sv" -match "*'BranchTargetALU'*"
 lint_off -rule WIDTH -file "*/rtl/ibex_core_tracing.sv" -match "*'WritebackStage'*"
 lint_off -rule WIDTH -file "*/rtl/ibex_core_tracing.sv" -match "*'SecureIbex'*"
+lint_off -rule WIDTH -file "*/rtl/ibex_core_tracing.sv" -match "*'PMPEnable'*"
 
 // Filename 'ibex_register_file_ff' does not match MODULE name: ibex_register_file
 // ibex_register_file_ff and ibex_register_file_latch provide two