riscv/rocket-chip
1
0
Fork 0
Code Releases Activity

Simplify TileLink Narrower

Browse Source 
It's not necessary to use addr_beat to determine where to put the Grant
data.  Just stripe it across all lanes.

This also gets rid of a dependence on addr_beat in Grant.  If we move
towards a regime where TileLink is only narrowed, not widened, we may
be able to drop the field altogether.
This commit is contained in:
Andrew Waterman 2016-04-26 16:44:54 -07:00
parent f6e44b1348
commit 356efe2fd5
1 changed files with 1 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
uncore/src/main/scala/converters.scala
View File

@ -1011,9 +1011,6 @@ class TileLinkIONarrower(innerTLId: String, outerTLId: String)
data = gnt_data_buffer.toBits)(innerConfig) data = gnt_data_buffer.toBits)(innerConfig)
val smallget_grant = ognt.g_type === Grant.getDataBeatType val smallget_grant = ognt.g_type === Grant.getDataBeatType
val get_grant_align = io.out.grant.bits.addr_beat(
innerByteAddrBits - outerByteAddrBits - 1, 0)
val get_grant_shift = Cat(get_grant_align, UInt(0, outerByteAddrBits + 3))
val get_grant = Grant( val get_grant = Grant(
is_builtin_type = Bool(true), is_builtin_type = Bool(true),
@ -1021,7 +1018,7 @@ class TileLinkIONarrower(innerTLId: String, outerTLId: String)
client_xact_id = ognt.client_xact_id, client_xact_id = ognt.client_xact_id,
manager_xact_id = ognt.manager_xact_id, manager_xact_id = ognt.manager_xact_id,
addr_beat = ognt.addr_beat >> UInt(log2Up(factor)), addr_beat = ognt.addr_beat >> UInt(log2Up(factor)),
data = ognt.data << get_grant_shift)(innerConfig) data = Fill(factor, ognt.data))(innerConfig)
io.in.grant.valid := sending_get || (io.out.grant.valid && !ognt_block) io.in.grant.valid := sending_get || (io.out.grant.valid && !ognt_block)
io.out.grant.ready := !sending_get && (ognt_block || io.in.grant.ready) io.out.grant.ready := !sending_get && (ognt_block || io.in.grant.ready)