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Remove IO path from LSU interface

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This commit is contained in:
Florian Zaruba 2017-05-18 20:26:41 +02:00
parent 66d2f0c572
commit ccf6a059bd
2 changed files with 11 additions and 15 deletions
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22
src/lsu.sv
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@ -268,7 +268,7 @@ module lsu #(
lsu_ready_o = 1'b1;
// LSU result is valid
// we need to give the valid result even to stores
lsu_valid_o = 1'b0;
lsu_valid_o = data_rvalid_o[1];
// is the store valid e.g.: can we put it in the store buffer
st_valid = 1'b0;
// as a default we are not requesting on the read interface
@ -333,24 +333,20 @@ module lsu #(
if (enable_translation_i) begin
// translation from the previous cycle was valid
if (translation_valid_q) begin
lsu_ready_o = 1'b1;
// output the physical address
address_i[1] = paddr_q;
// wait for the rvalid
if (data_rvalid_o[1]) begin
lsu_ready_o = 1'b1;
lsu_valid_o = 1'b1;
// we can make a new request here
if (lsu_valid_i)
make_request = 1'b1;
end
end else begin
// we can make a new request here
if (lsu_valid_i)
make_request = 1'b1;
end else begin // TODO: Abort in case of access exception
data_tag_status_i[1] = `WAIT_TRANSLATION;
end
// we do not need address translation, we can simply wait for the rvalid
end else if (data_rvalid_o) begin
end else if (lsu_valid) begin
// we can make a new request here
if (lsu_valid_i)
make_request = 1'b1;
make_request = 1'b1;
lsu_ready_o = 1'b1;
end
end
// we've got a flush request but have an outstanding rvalid, wait for it

4
src/mem_arbiter.sv
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@ -144,8 +144,8 @@ module mem_arbiter #(
// ----------------------------
// Multi-cycle memory requests
// ----------------------------
// do we have an outstanding request e.g.: a request which is waiting for a grant or an tag_valid
// here we need to wait for the tag
// do we have an outstanding request e.g.: a request which is waiting for a grant or a tag_valid
// here we need to wait for the grant
WAIT_GNT: begin
// we can check for it since we only stay in this state if didn't yet receive a grant
if (data_gnt_i) begin