Merge pull request #1719 from ucb-bar/add-default-scratch

CHANGE: Set scratchpad as default config

fpga/src/main/scala/arty/Configs.scala

@@ -30,7 +30,8 @@ class WithArtyTweaks extends Config(
   new chipyard.config.WithFrontBusFrequency(32) ++
   new chipyard.config.WithControlBusFrequency(32) ++
   new chipyard.config.WithPeripheryBusFrequency(32) ++
-  new testchipip.serdes.WithNoSerialTL
+  new testchipip.serdes.WithNoSerialTL ++
+  new testchipip.soc.WithNoScratchpads
 )
 
 class TinyRocketArtyConfig extends Config(

fpga/src/main/scala/arty100t/Configs.scala

@@ -46,7 +46,6 @@ class WithArty100TTweaks(freqMHz: Double = 50) extends Config(
 
 class RocketArty100TConfig extends Config(
   new WithArty100TTweaks ++
-  new testchipip.soc.WithMbusScratchpad(base = 0x08000000, size = 128 * 1024) ++ // add on-chip scratchpad for small programs
   new chipyard.config.WithBroadcastManager ++ // no l2
   new chipyard.RocketConfig)
 

generators/chipyard/src/main/scala/config/AbstractConfig.scala

@@ -69,6 +69,8 @@ class AbstractConfig extends Config(
       width = 32                                                    // serial-tilelink interface with 32 lanes
     )
   )) ++
+  new testchipip.soc.WithMbusScratchpad(base = 0x08000000,          // add 64 KiB on-chip scratchpad
+                                        size = 64 * 1024) ++
   new chipyard.config.WithDebugModuleAbstractDataWords(8) ++        // increase debug module data capacity
   new chipyard.config.WithBootROM ++                                // use default bootrom
   new chipyard.config.WithUART ++                                   // add a UART

generators/chipyard/src/main/scala/config/NoCConfigs.scala

@@ -146,7 +146,7 @@ class MultiNoCConfig extends Config(
  * L2 3   | MI  | Cache[3]   |    6
  * DRAM 0 | MO  | system[0]  |    3
  * DRAM 1 | MO  | system[1]  |    5
- * extram | MO  | serial_tl_0  |    9
+ * spad   | MO  | ram[0]     |    9
  */
 // DOC include start: SharedNoCConfig
 class SharedNoCConfig extends Config(
@@ -169,7 +169,7 @@ class SharedNoCConfig extends Config(
         "Cache[0]" -> 0, "Cache[1]" -> 2, "Cache[2]" -> 8, "Cache[3]" -> 6),
       outNodeMapping = ListMap(
         "system[0]" -> 3, "system[1]" -> 5,
-        "serial_tl_0" -> 9))
+        "ram[0]" -> 9))
   )) ++
   new constellation.soc.WithSbusNoC(constellation.protocol.GlobalTLNoCParams(
     constellation.protocol.DiplomaticNetworkNodeMapping(

generators/chipyard/src/main/scala/config/NoCoreConfigs.scala

@@ -4,6 +4,7 @@ import org.chipsalliance.cde.config.{Config}
 
 // A empty config with no cores. Useful for testing
 class NoCoresConfig extends Config(
+  new testchipip.soc.WithNoScratchpads ++
   new testchipip.boot.WithNoBootAddrReg ++
   new testchipip.boot.WithNoCustomBootPin ++
   new chipyard.config.WithNoCLINT ++

generators/chipyard/src/main/scala/config/RocketConfigs.scala

@@ -12,7 +12,8 @@ class RocketConfig extends Config(
   new chipyard.config.AbstractConfig)
 
 class TinyRocketConfig extends Config(
-  new chipyard.harness.WithDontTouchChipTopPorts(false) ++         // TODO FIX: Don't dontTouch the ports
+  new chipyard.harness.WithDontTouchChipTopPorts(false) ++        // TODO FIX: Don't dontTouch the ports
+  new testchipip.soc.WithNoScratchpads ++                         // All memory is the Rocket TCMs
   new freechips.rocketchip.subsystem.WithIncoherentBusTopology ++ // use incoherent bus topology
   new freechips.rocketchip.subsystem.WithNBanks(0) ++             // remove L2$
   new freechips.rocketchip.subsystem.WithNoMemPort ++             // remove backing memory
@@ -36,6 +37,7 @@ class RV32RocketConfig extends Config(
 // DOC include start: l1scratchpadrocket
 class ScratchpadOnlyRocketConfig extends Config(
   new chipyard.config.WithL2TLBs(0) ++
+  new testchipip.soc.WithNoScratchpads ++                      // remove subsystem scratchpads, confusingly named, does not remove the L1D$ scratchpads
   new freechips.rocketchip.subsystem.WithNBanks(0) ++
   new freechips.rocketchip.subsystem.WithNoMemPort ++          // remove offchip mem port
   new freechips.rocketchip.subsystem.WithScratchpadsOnly ++    // use rocket l1 DCache scratchpad as base phys mem

generators/chipyard/src/main/scala/config/SodorConfigs.scala

@@ -7,6 +7,7 @@ import org.chipsalliance.cde.config.{Config}
 class Sodor1StageConfig extends Config(
   // Create a Sodor 1-stage core
   new sodor.common.WithNSodorCores(1, internalTile = sodor.common.Stage1Factory) ++
+  new testchipip.soc.WithNoScratchpads ++                      // No scratchpads
   new testchipip.serdes.WithSerialTLWidth(32) ++
   new freechips.rocketchip.subsystem.WithScratchpadsOnly ++    // use sodor tile-internal scratchpad
   new freechips.rocketchip.subsystem.WithNoMemPort ++          // use no external memory
@@ -16,6 +17,7 @@ class Sodor1StageConfig extends Config(
 class Sodor2StageConfig extends Config(
   // Create a Sodor 2-stage core
   new sodor.common.WithNSodorCores(1, internalTile = sodor.common.Stage2Factory) ++
+  new testchipip.soc.WithNoScratchpads ++                      // No scratchpads
   new testchipip.serdes.WithSerialTLWidth(32) ++
   new freechips.rocketchip.subsystem.WithScratchpadsOnly ++    // use sodor tile-internal scratchpad
   new freechips.rocketchip.subsystem.WithNoMemPort ++          // use no external memory
@@ -25,6 +27,7 @@ class Sodor2StageConfig extends Config(
 class Sodor3StageConfig extends Config(
   // Create a Sodor 1-stage core with two ports
   new sodor.common.WithNSodorCores(1, internalTile = sodor.common.Stage3Factory(ports = 2)) ++
+  new testchipip.soc.WithNoScratchpads ++                      // No scratchpads
   new testchipip.serdes.WithSerialTLWidth(32) ++
   new freechips.rocketchip.subsystem.WithScratchpadsOnly ++    // use sodor tile-internal scratchpad
   new freechips.rocketchip.subsystem.WithNoMemPort ++          // use no external memory
@@ -34,6 +37,7 @@ class Sodor3StageConfig extends Config(
 class Sodor3StageSinglePortConfig extends Config(
   // Create a Sodor 3-stage core with one ports (instruction and data memory access controlled by arbiter)
   new sodor.common.WithNSodorCores(1, internalTile = sodor.common.Stage3Factory(ports = 1)) ++
+  new testchipip.soc.WithNoScratchpads ++                      // No scratchpads
   new testchipip.serdes.WithSerialTLWidth(32) ++
   new freechips.rocketchip.subsystem.WithScratchpadsOnly ++    // use sodor tile-internal scratchpad
   new freechips.rocketchip.subsystem.WithNoMemPort ++          // use no external memory
@@ -43,6 +47,7 @@ class Sodor3StageSinglePortConfig extends Config(
 class Sodor5StageConfig extends Config(
   // Create a Sodor 5-stage core
   new sodor.common.WithNSodorCores(1, internalTile = sodor.common.Stage5Factory) ++
+  new testchipip.soc.WithNoScratchpads ++                      // No scratchpads
   new testchipip.serdes.WithSerialTLWidth(32) ++
   new freechips.rocketchip.subsystem.WithScratchpadsOnly ++    // use sodor tile-internal scratchpad
   new freechips.rocketchip.subsystem.WithNoMemPort ++          // use no external memory
@@ -52,6 +57,7 @@ class Sodor5StageConfig extends Config(
 class SodorUCodeConfig extends Config(
   // Construct a Sodor microcode-based single-bus core
   new sodor.common.WithNSodorCores(1, internalTile = sodor.common.UCodeFactory) ++
+  new testchipip.soc.WithNoScratchpads ++                      // No scratchpads
   new testchipip.serdes.WithSerialTLWidth(32) ++
   new freechips.rocketchip.subsystem.WithScratchpadsOnly ++    // use sodor tile-internal scratchpad
   new freechips.rocketchip.subsystem.WithNoMemPort ++          // use no external memory