How to config xLen in rocket core?
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I am trying to use rocket core as a baseline core and add some additional features for research purpose, but I can't find where or how to change the value "xLen".
riscv chisel rocket-chip
asked Nov 9 at 3:54
Shibo Chen
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I am trying to use rocket core as a baseline core and add some additional features for research purpose, but I can't find where or how to change the value "xLen".
riscv chisel rocket-chip
asked Nov 9 at 3:54
Shibo Chen
152
Hi , Welcome to stack overflow .Please take the time to read to see How to Ask
– core114
Nov 9 at 4:57
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up vote
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favorite
up vote
0
down vote
favorite
I am trying to use rocket core as a baseline core and add some additional features for research purpose, but I can't find where or how to change the value "xLen".
riscv chisel rocket-chip
asked Nov 9 at 3:54
Shibo Chen
152
I am trying to use rocket core as a baseline core and add some additional features for research purpose, but I can't find where or how to change the value "xLen".
riscv chisel rocket-chip
riscv chisel rocket-chip
asked Nov 9 at 3:54
Shibo Chen
152
asked Nov 9 at 3:54
Shibo Chen
152
asked Nov 9 at 3:54
Shibo Chen
152
asked Nov 9 at 3:54
Shibo Chen
152
asked Nov 9 at 3:54
Shibo Chen
152
152
Hi , Welcome to stack overflow .Please take the time to read to see How to Ask
– core114
Nov 9 at 4:57
add a comment |
Hi , Welcome to stack overflow .Please take the time to read to see How to Ask
– core114
Nov 9 at 4:57
Hi , Welcome to stack overflow .Please take the time to read to see How to Ask
– core114
Nov 9 at 4:57
Hi , Welcome to stack overflow .Please take the time to read to see How to Ask
– core114
Nov 9 at 4:57
add a comment |
1 Answer
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Rocket Chip uses a default XLen of 64 in it's DefaultConfig. However, this can be changed to 32 via a different top-level System configuration of DefaultRV32Config.
If you're working with the Rocket Chip emulator, you can compile these two different configurations with
cd emulator
CONFIG=DefaultConfig make
CONFIG=DefaultRV32Config make
For reference, take a look at the Rocket Chip System configurations defined in the system package as well as the subsystem configurations:
src/main/scala/system/Configs.scalasrc/main/scala/subsystem/Configs.scala
The former defines DefaultConfig and DefaultRV32Config. The latter defines WithRV32. WithRV32 is what changes XLen to 32 (and also sets fLen to 32). Alternatively, you can replicate the behavior of WithRV32 in your own subclass of Config.
answered Nov 9 at 16:36
seldridge
62549
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
0
down vote
accepted
Rocket Chip uses a default XLen of 64 in it's DefaultConfig. However, this can be changed to 32 via a different top-level System configuration of DefaultRV32Config.
If you're working with the Rocket Chip emulator, you can compile these two different configurations with
cd emulator
CONFIG=DefaultConfig make
CONFIG=DefaultRV32Config make
For reference, take a look at the Rocket Chip System configurations defined in the system package as well as the subsystem configurations:
src/main/scala/system/Configs.scalasrc/main/scala/subsystem/Configs.scala
The former defines DefaultConfig and DefaultRV32Config. The latter defines WithRV32. WithRV32 is what changes XLen to 32 (and also sets fLen to 32). Alternatively, you can replicate the behavior of WithRV32 in your own subclass of Config.
answered Nov 9 at 16:36
seldridge
62549
add a comment |
up vote
0
down vote
accepted
Rocket Chip uses a default XLen of 64 in it's DefaultConfig. However, this can be changed to 32 via a different top-level System configuration of DefaultRV32Config.
If you're working with the Rocket Chip emulator, you can compile these two different configurations with
cd emulator
CONFIG=DefaultConfig make
CONFIG=DefaultRV32Config make
For reference, take a look at the Rocket Chip System configurations defined in the system package as well as the subsystem configurations:
src/main/scala/system/Configs.scalasrc/main/scala/subsystem/Configs.scala
The former defines DefaultConfig and DefaultRV32Config. The latter defines WithRV32. WithRV32 is what changes XLen to 32 (and also sets fLen to 32). Alternatively, you can replicate the behavior of WithRV32 in your own subclass of Config.
answered Nov 9 at 16:36
seldridge
62549
add a comment |
up vote
0
down vote
accepted
up vote
0
down vote
accepted
Rocket Chip uses a default XLen of 64 in it's DefaultConfig. However, this can be changed to 32 via a different top-level System configuration of DefaultRV32Config.
If you're working with the Rocket Chip emulator, you can compile these two different configurations with
cd emulator
CONFIG=DefaultConfig make
CONFIG=DefaultRV32Config make
For reference, take a look at the Rocket Chip System configurations defined in the system package as well as the subsystem configurations:
src/main/scala/system/Configs.scalasrc/main/scala/subsystem/Configs.scala
The former defines DefaultConfig and DefaultRV32Config. The latter defines WithRV32. WithRV32 is what changes XLen to 32 (and also sets fLen to 32). Alternatively, you can replicate the behavior of WithRV32 in your own subclass of Config.
answered Nov 9 at 16:36
seldridge
62549
Rocket Chip uses a default XLen of 64 in it's DefaultConfig. However, this can be changed to 32 via a different top-level System configuration of DefaultRV32Config.
If you're working with the Rocket Chip emulator, you can compile these two different configurations with
cd emulator
CONFIG=DefaultConfig make
CONFIG=DefaultRV32Config make
For reference, take a look at the Rocket Chip System configurations defined in the system package as well as the subsystem configurations:
src/main/scala/system/Configs.scalasrc/main/scala/subsystem/Configs.scala
The former defines DefaultConfig and DefaultRV32Config. The latter defines WithRV32. WithRV32 is what changes XLen to 32 (and also sets fLen to 32). Alternatively, you can replicate the behavior of WithRV32 in your own subclass of Config.
answered Nov 9 at 16:36
seldridge
62549
answered Nov 9 at 16:36
seldridge
62549
answered Nov 9 at 16:36
seldridge
62549
answered Nov 9 at 16:36
seldridge
62549
62549
add a comment |
add a comment |
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Hi , Welcome to stack overflow .Please take the time to read to see How to Ask
– core114
Nov 9 at 4:57