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Override default baud rate for FireChip

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This avoids target software needing to explicitly set the divisor to
match the UART bridge.
This commit is contained in:
Albert Ou
2020-07-07 23:00:14 -07:00
parent 60f7ec60bd
commit b55e579c91
3 changed files with 8 additions and 7 deletions
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7
generators/firechip/src/main/scala/TargetConfigs.scala
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@@ -69,7 +69,8 @@ class WithNVDLASmall extends nvidia.blocks.dla.WithNVDLA("small")
class WithFireSimConfigTweaks extends Config(
// Required*: When using FireSim-as-top to provide a correct path to the target bootrom source
new WithBootROM ++
// Optional*: Removing this will require target-software changes to properly capture UART output
// Optional*: Removing this will require adjusting the UART baud rate and
// potential target-software changes to properly capture UART output
new WithPeripheryBusFrequency(BigInt(3200000000L)) ++
// Required: Existing FAME-1 transform cannot handle black-box clock gates
new WithoutClockGating ++
@@ -85,8 +86,8 @@ class WithFireSimConfigTweaks extends Config(
new testchipip.WithTSI ++
// Optional: Removing this will require using an initramfs under linux
new testchipip.WithBlockDevice ++
// Required*:
new chipyard.config.WithUART
// Required*: Scale default baud rate with periphery bus frequency
new chipyard.config.WithUART(BigInt(3686400L))
)
/*******************************************************************************