Artturin/riscv-bluespec-classic
1
0
Fork 0
forked from ReferenceProjects/riscv-bluespec-classic
Code Pull requests Activity

reverting as it seems we really cant condition rules on arguments safely

Browse source
This commit is contained in:
Yehowshua Immanuel 2025-03-23 18:30:56 -04:00
parent 996febbff5
commit 35fc49382d
2 changed files with 47 additions and 26 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

38
bs/TagEngine.bs
View file

@ -9,8 +9,7 @@ import Util
interface (TagEngine :: # -> *) numTags =
requestTag :: ActionValue UIntLog2N(numTags)
setTagToRetire :: UIntLog2N(numTags) -> Action
retireTag :: Action
retireTag :: UIntLog2N(numTags) -> Action
-- The tag engine returns a tag that is unique for the duration of
-- the lifetime of the tag. Useful when you need to tag transactions
@ -30,9 +29,6 @@ mkTagEngine =
stackPtr :: (Reg (Maybe(UIntLog2N(numTags))))
stackPtr <- mkReg |> Just |> reifiedNumTags - 1
tagToRetire :: RWire (UIntLog2N(numTags))
tagToRetire <- mkRWireSBR
debugOnce <- mkReg True
addRules $
@ -60,27 +56,19 @@ mkTagEngine =
when
Just sampledStackPtr <- stackPtr
setTagToRetire :: UIntLog2N(numTags) -> Action
setTagToRetire tag =
let
tagValid = tag < (reifiedNumTags - 1)
tagInUse = readReg (select inUseVec tag)
in
do
if (tagValid && tagInUse)
then do tagToRetire.wset tag
else do action {}
retireTag :: Action
retireTag =
retireTag :: UIntLog2N(numTags) -> Action
retireTag tag =
do
let nextStackPtrUint =
let
tagValid = tag < reifiedNumTags
tagInUse = readReg (select inUseVec tag)
nextStackPtrUint =
case stackPtr of
Nothing -> 0
Just n -> n + 1
(select freeStackVec nextStackPtrUint) := tag
stackPtr := Just nextStackPtrUint
(select inUseVec tag) := False
when
Valid tag <- tagToRetire.wget
if (tagValid && tagInUse)
then do
(select inUseVec tag) := False
(select freeStackVec nextStackPtrUint) := tag
stackPtr := Just nextStackPtrUint
else action {}

35
bs/Top.bs
View file

@ -8,6 +8,7 @@ import CBindings
import Bus
import TagEngine
import List
import ActionSeq
type FCLK = 25000000
type BAUD = 9600
@ -102,12 +103,44 @@ mkSim = do
let cfg :: BRAM_Configure = defaultValue
tagEngine :: TagEngine 5 <- mkTagEngine
count :: Reg (UInt 3) <- mkReg 0;
count :: Reg (UInt 4) <- mkReg 0;
initCFunctions :: Reg Bool <- mkReg False;
core :: Core FCLK <- mkCore;
s :: ActionSeq
s <- actionSeq
$ do
$display "got tag : " tagEngine.requestTag
|> do
$display "got tag : " tagEngine.requestTag
|> do
$display "got tag : " tagEngine.requestTag
|> do
$display "retiring tag : 3"
tagEngine.retireTag 3
|> do
$display "got tag : " tagEngine.requestTag
|> do
$display "got tag : " tagEngine.requestTag
|> do
$display "retiring tag : 4"
tagEngine.retireTag 4
|> do
$display "got tag : " tagEngine.requestTag
|> do
$display "got tag : " tagEngine.requestTag
|> do
$display "retiring tag : 1"
tagEngine.retireTag 1
|> do
$display "got tag : " tagEngine.requestTag
addRules $
rules
"testIncrement": when (count < 10) ==>
do
count := count + 1
s.start
"initCFunctionsOnce": when not initCFunctions ==>
do
initTerminal