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Added mrvq_recover_ready_state_st2 to optimize fills sent

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felsabbagh3
2020-05-23 21:47:51 -07:00
parent 0cd9bd689e
commit a1e9b512b0
1 changed files with 9 additions and 4 deletions
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13
hw/rtl/cache/VX_bank.v vendored
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@@ -386,6 +386,7 @@ module VX_bank #(
wire miss_add_because_miss;
wire valid_st1e;
wire from_mrvq_st1e;
wire mrvq_recover_ready_state_st1e;
assign from_mrvq_st1e = from_mrvq_st1[STAGE_1_CYCLES-1];
assign valid_st1e = valid_st1 [STAGE_1_CYCLES-1];
@@ -397,6 +398,9 @@ module VX_bank #(
assign force_request_miss_st1e = (valid_st1e && !from_mrvq_st1e && (mrvq_pending_hazard_st1e || st2_pending_hazard_st1e)) || (valid_st1e && from_mrvq_st1e && recover_mrvq_state_st2);
assign mrvq_recover_ready_state_st1e = valid_st1e && from_mrvq_st1e && recover_mrvq_state_st2 && (addr_st2 == addr_st1[STAGE_1_CYCLES-1]);
VX_tag_data_access #(
.CACHE_SIZE (CACHE_SIZE),
.BANK_LINE_SIZE (BANK_LINE_SIZE),
@@ -463,20 +467,21 @@ module VX_bank #(
wire snp_to_mrvq_st2;
wire from_mrvq_st2;
wire mrvq_init_ready_state_st2;
wire mrvq_recover_ready_state_st2;
wire mrvq_init_ready_state_unqual_st2;
wire mrvq_init_ready_state_hazard_st0_st1;
wire mrvq_init_ready_state_hazard_st1e_st1;
wire recover_mrvq_state_st2;
VX_generic_register #(
.N(1+ 1 + 1 + 1 + 1 + 1 + 1 + `LINE_ADDR_WIDTH + `BASE_ADDR_BITS + `WORD_WIDTH + `WORD_WIDTH + `BANK_LINE_WIDTH + `TAG_SELECT_BITS + 1 + 1 + `REQ_INST_META_WIDTH)
.N(1+ 1+ 1 + 1 + 1 + 1 + 1 + 1 + `LINE_ADDR_WIDTH + `BASE_ADDR_BITS + `WORD_WIDTH + `WORD_WIDTH + `BANK_LINE_WIDTH + `TAG_SELECT_BITS + 1 + 1 + `REQ_INST_META_WIDTH)
) st_1e_2 (
.clk (clk),
.reset(reset),
.stall(stall_bank_pipe),
.flush(1'b0),
.in ({from_mrvq_st1e_st2, mrvq_init_ready_state_st1e , snp_to_mrvq_st1e, is_snp_st1e, fill_saw_dirty_st1e, is_fill_st1[STAGE_1_CYCLES-1] , qual_valid_st1e_2, addr_st1[STAGE_1_CYCLES-1], wsel_st1[STAGE_1_CYCLES-1], writeword_st1[STAGE_1_CYCLES-1], readword_st1e, readdata_st1e, readtag_st1e, miss_st1e, dirty_st1e, inst_meta_st1[STAGE_1_CYCLES-1]}),
.out ({from_mrvq_st2 , mrvq_init_ready_state_unqual_st2, snp_to_mrvq_st2 , is_snp_st2 , fill_saw_dirty_st2 , is_fill_st2 , valid_st2 , addr_st2 , wsel_st2, writeword_st2 , readword_st2 , readdata_st2 , readtag_st2 , miss_st2 , dirty_st2 , inst_meta_st2 })
.in ({mrvq_recover_ready_state_st1e, from_mrvq_st1e_st2, mrvq_init_ready_state_st1e , snp_to_mrvq_st1e, is_snp_st1e, fill_saw_dirty_st1e, is_fill_st1[STAGE_1_CYCLES-1] , qual_valid_st1e_2, addr_st1[STAGE_1_CYCLES-1], wsel_st1[STAGE_1_CYCLES-1], writeword_st1[STAGE_1_CYCLES-1], readword_st1e, readdata_st1e, readtag_st1e, miss_st1e, dirty_st1e, inst_meta_st1[STAGE_1_CYCLES-1]}),
.out ({mrvq_recover_ready_state_st2 , from_mrvq_st2 , mrvq_init_ready_state_unqual_st2, snp_to_mrvq_st2 , is_snp_st2 , fill_saw_dirty_st2 , is_fill_st2 , valid_st2 , addr_st2 , wsel_st2, writeword_st2 , readword_st2 , readdata_st2 , readtag_st2 , miss_st2 , dirty_st2 , inst_meta_st2 })
);
@@ -626,7 +631,7 @@ module VX_bank #(
// .invalidate_fill (invalidate_fill)
// );
wire dram_fill_req_unqual = miss_add_unqual && (!mrvq_init_ready_state_st2 || from_mrvq_st2);
wire dram_fill_req_unqual = miss_add_unqual && (!mrvq_init_ready_state_st2 || (from_mrvq_st2 && !mrvq_recover_ready_state_st2));
assign dram_fill_req_valid = dram_fill_req_unqual
&& dram_fill_req_ready