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Fixed Stall Pipeline Logic

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This commit is contained in:
felsabbagh3
2020-03-09 22:08:46 -07:00
parent e2ffbcf14b
commit cf0173ae15
5 changed files with 88 additions and 8 deletions
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18
rtl/VX_cache/VX_bank.v
View File

@@ -37,6 +37,8 @@ module VX_bank
parameter DFQQ_SIZE = 8,
// Lower Level Cache Hit Queue Size
parameter LLVQ_SIZE = 16,
// Fill Forward SNP Queue
parameter FFSQ_SIZE = 8,
// Fill Invalidator Size {Fill invalidator must be active}
parameter FILL_INVALIDAOR_SIZE = 16,
@@ -95,7 +97,10 @@ module VX_bank
// Snp Request
input wire snp_req,
input wire[31:0] snp_req_addr
input wire[31:0] snp_req_addr,
output wire snp_fwd,
output wire[31:0] snp_fwd_addr
);
@@ -511,7 +516,7 @@ module VX_bank
// Enqueue to miss reserv if it's a valid miss
assign miss_add = valid_st2 && miss_st2 && !mrvq_full && !((cwbq_push && cwbq_full) || (dwbq_push && dwbq_full) || (dram_fill_req && dram_fill_req_queue_full));
assign miss_add = valid_st2 && miss_st2 && !mrvq_full && !(((valid_st2 && !miss_st2) && cwbq_full) || (((valid_st2 && miss_st2 && dirty_st2) || fill_saw_dirty_st2) && dwbq_full) || (valid_st2 && miss_st2 && mrvq_full));
assign miss_add_pc = pc_st2;
assign miss_add_addr = addr_st2;
assign miss_add_data = writeword_st2;
@@ -519,7 +524,7 @@ module VX_bank
// Enqueue to CWB Queue
wire cwbq_push = (valid_st2 && !miss_st2) && !cwbq_full && !((FUNC_ID == `LLFUNC_ID) && (miss_add_wb == 0));
wire cwbq_push = (valid_st2 && !miss_st2) && !cwbq_full && !((FUNC_ID == `LLFUNC_ID) && (miss_add_wb == 0)) && !( (((valid_st2 && miss_st2 && dirty_st2) || fill_saw_dirty_st2) && dwbq_full) || (valid_st2 && miss_st2 && mrvq_full) || (valid_st2 && miss_st2 && !invalidate_fill && dram_fill_req_queue_full));
wire [`WORD_SIZE_RNG] cwbq_data = readword_st2;
wire [`vx_clog2(NUMBER_REQUESTS)-1:0] cwbq_tid = miss_add_tid;
wire [4:0] cwbq_rd = miss_add_rd;
@@ -544,7 +549,7 @@ module VX_bank
);
// Enqueue to DWB Queue
wire dwbq_push = ((valid_st2 && miss_st2 && dirty_st2) || fill_saw_dirty_st2) && !dwbq_full && !(!fill_saw_dirty_st2 && mrvq_full);
wire dwbq_push = ((valid_st2 && miss_st2 && dirty_st2) || fill_saw_dirty_st2) && !dwbq_full && !(((valid_st2 && !miss_st2) && cwbq_full) || (valid_st2 && miss_st2 && mrvq_full) || (valid_st2 && miss_st2 && !invalidate_fill && dram_fill_req_queue_full));
wire[31:0] dwbq_req_addr = {readtag_st2, addr_st2[`LINE_SELECT_ADDR_END:0]} & `BASE_ADDR_MASK;
wire[`BANK_LINE_SIZE_RNG][`WORD_SIZE-1:0] dwbq_req_data = readdata_st2;
wire dwbq_empty;
@@ -603,9 +608,12 @@ module VX_bank
.full (dwbq_full)
);
wire snp_fwd_push;
wire snp_fwd_pop;
assign stall_bank_pipe = (cwbq_push && cwbq_full) || (dwbq_push && dwbq_full) || (miss_add && mrvq_full) || (dram_fill_req && dram_fill_req_queue_full);
assign stall_bank_pipe = ((valid_st2 && !miss_st2) && cwbq_full) || (((valid_st2 && miss_st2 && dirty_st2) || fill_saw_dirty_st2) && dwbq_full) || (valid_st2 && miss_st2 && mrvq_full) || (valid_st2 && miss_st2 && !invalidate_fill && dram_fill_req_queue_full);
endmodule

3
rtl/VX_cache/VX_cache.v
View File

@@ -37,6 +37,8 @@ module VX_cache
parameter DFQQ_SIZE = 8,
// Lower Level Cache Hit Queue Size
parameter LLVQ_SIZE = 16,
// Fill Forward SNP Queue
parameter FFSQ_SIZE = 8,
// Fill Invalidator Size {Fill invalidator must be active}
parameter FILL_INVALIDAOR_SIZE = 16,
@@ -343,6 +345,7 @@ module VX_cache
.DWBQ_SIZE (DWBQ_SIZE),
.DFQQ_SIZE (DFQQ_SIZE),
.LLVQ_SIZE (LLVQ_SIZE),
.FFSQ_SIZE (FFSQ_SIZE),
.FILL_INVALIDAOR_SIZE (FILL_INVALIDAOR_SIZE),
.SIMULATED_DRAM_LATENCY_CYCLES(SIMULATED_DRAM_LATENCY_CYCLES)
)