wu-arch/chipyard
1
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

Add BringupHostConfig and TetheredChip dual-chip sim configs

Browse Source
This commit is contained in:
Jerry Zhao
2023-05-25 23:41:42 -07:00
parent 68402ab99f
commit 8a46de0d9d
1 changed files with 14 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files

30
generators/chipyard/src/main/scala/config/ChipConfigs.scala
View File

@@ -48,44 +48,42 @@ class ChipLikeRocketConfig extends Config(
class ChipBringupHostConfig extends Config(
//=============================
// Set up TestHarness for standalone-sim
// These fragments only affect the design when simulated by itself (without the ChipLikeRocketConfig)
//=============================
new chipyard.harness.WithAbsoluteFreqHarnessClockInstantiator ++
new chipyard.harness.WithSerialTLTiedOff ++ // when doing standalone sim, tie off the serial-tl port
new chipyard.harness.WithSimTSIToUARTTSI ++
new chipyard.iobinders.WithSerialTLPunchthrough ++
new chipyard.harness.WithAbsoluteFreqHarnessClockInstantiator ++ // Generate absolute frequencies
new chipyard.harness.WithSerialTLTiedOff ++ // when doing standalone sim, tie off the serial-tl port
new chipyard.harness.WithSimTSIToUARTTSI ++ // Attach SimTSI-over-UART to the UART-TSI port
new chipyard.iobinders.WithSerialTLPunchthrough ++ // Don't generate IOCells for the serial TL (this design maps to FPGA)
//=============================
// Setup the SerialTL side on the bringup device
//=============================
new testchipip.WithSerialTLWidth(4) ++ // match width with the chip
new testchipip.WithSerialTLMem(base = 0x0, size = BigInt(1) << 48, // accessible memory of the chip
idBits = 4, isMainMemory = false) ++
new testchipip.WithSerialTLMem(base = 0x0, size = 0x80000000L, // accessible memory of the chip that doesn't come from the tethered host
idBits = 4, isMainMemory = false) ++ // This assumes off-chip mem starts at 0x8000_0000
new testchipip.WithSerialTLClockDirection(provideClockFreqMHz = Some(75)) ++ // bringup board drives the clock for the serial-tl receiver on the chip, use 50MHz clock
//============================
// Setup bus topology on the bringup system
//============================
new testchipip.WithOffchipBusManager(SBUS,
blockRange = AddressSet.misaligned(0x80000000L, (BigInt(1) << 30) * 4),
replicationBase = Some(BigInt(1) << 48)) ++
new testchipip.WithOffchipBusManager(SBUS, // offchip bus hans off the SBUS
blockRange = AddressSet.misaligned(0x80000000L, (BigInt(1) << 30) * 4)) ++ // offchip bus should not see the main memory of the testchip, since that can be accesses directly through this system
new testchipip.WithOffchipBus ++ // offchip bus
//=============================
// Set up memory on the bringup system
//=============================
new freechips.rocketchip.subsystem.WithExtMemSize((1 << 30) * 4L) ++ // match what the chip believes
new freechips.rocketchip.subsystem.WithExtMemSize((1 << 30) * 4L) ++ // match what the chip believes the max size should be
//=============================
// Generate the TSI-over-UART side of the bringup system
//=============================
new testchipip.WithUARTTSIClient(initBaudRate = BigInt(921600)) ++ // nonstandard baud rate to improve performance
new testchipip.WithUARTTSIClient(initBaudRate = BigInt(921600)) ++ // nonstandard baud rate to improve performance
//=============================
// Set up clocks of the bringup system
//=============================
new chipyard.clocking.WithPassthroughClockGenerator ++ // pass all the clocks through, since this isn't a chip
new chipyard.config.WithFrontBusFrequency(75.0) ++
new chipyard.clocking.WithPassthroughClockGenerator ++ // pass all the clocks through, since this isn't a chip
new chipyard.config.WithFrontBusFrequency(75.0) ++ // run all buses of this system at 75 MHz
new chipyard.config.WithMemoryBusFrequency(75.0) ++
new chipyard.config.WithPeripheryBusFrequency(75.0) ++
@@ -93,7 +91,7 @@ class ChipBringupHostConfig extends Config(
new chipyard.NoCoresConfig)
class TetheredChipLikeRocketConfig extends Config(
new chipyard.harness.WithAbsoluteFreqHarnessClockInstantiator ++ // use absolute freqs for sims in the harness
new chipyard.harness.WithMultiChipSerialTL(0, 1) ++
new chipyard.harness.WithAbsoluteFreqHarnessClockInstantiator ++ // use absolute freqs for sims in the harness
new chipyard.harness.WithMultiChipSerialTL(0, 1) ++ // connect the serial-tl ports of the chips together
new chipyard.harness.WithMultiChip(0, new ChipLikeRocketConfig) ++
new chipyard.harness.WithMultiChip(1, new ChipBringupHostConfig))