wu-arch/kernels
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Icache/Dcache finally done + configurability tested:

Browse Source
This commit is contained in:
felsabbagh3
2019-11-09 00:03:15 -05:00
parent 8b81989bfd
commit ea7bd485ca
8 changed files with 517 additions and 349 deletions
Download Patch File Download Diff File Expand all files Collapse all files

51
rtl/cache/VX_d_cache.v vendored
View File

@@ -103,6 +103,8 @@ module VX_d_cache
assign o_p_readdata = new_final_data_read_Qual;
reg[CACHE_WAY_INDEX-1:0] global_way_to_evict;
wire[CACHE_BANKS - 1 : 0][NUM_REQ-1:0] thread_track_banks; // Valid thread mask per bank
wire[CACHE_BANKS - 1 : 0][LOG_NUM_REQ-1:0] index_per_bank; // Index of thread each bank will try to service
@@ -116,9 +118,9 @@ module VX_d_cache
reg[CACHE_BANKS-1:0] eviction_wb_old;
wire[CACHE_BANKS -1 : 0][CACHE_WAY_INDEX-1:0] evicted_way_new;
reg [CACHE_BANKS -1 : 0][CACHE_WAY_INDEX-1:0] evicted_way_old;
wire[CACHE_BANKS -1 : 0][CACHE_WAY_INDEX-1:0] way_used;
// wire[CACHE_BANKS -1 : 0][CACHE_WAY_INDEX-1:0] evicted_way_new;
// reg [CACHE_BANKS -1 : 0][CACHE_WAY_INDEX-1:0] evicted_way_old;
// wire[CACHE_BANKS -1 : 0][CACHE_WAY_INDEX-1:0] way_used;
// Internal State
reg [3:0] state;
@@ -133,7 +135,7 @@ module VX_d_cache
reg[CACHE_BANKS - 1 : 0][31:0] eviction_addr_per_bank;
reg[31:0] miss_addr;
reg[31:0] evict_addr;
// reg[31:0] evict_addr;
wire curr_processor_request_valid = (|i_p_valid);
@@ -240,6 +242,9 @@ module VX_d_cache
// Handle if there is more than one miss
assign new_stored_valid = use_valid & (~threads_serviced_Qual);
wire update_global_way_to_evict = ((state == RECIV_MEM_RSP) && (new_state == CACHE_IDLE) && (CACHE_WAYS)) && (CACHE_WAYS > 1);
///////////////////////////////////////////////////////////////////////
genvar cur_t;
integer init_b;
@@ -251,28 +256,37 @@ module VX_d_cache
stored_valid <= 0;
// eviction_addr_per_bank <= 0;
miss_addr <= 0;
evict_addr <= 0;
// evict_addr <= 0;
// threads_serviced_Qual = 0;
// for (init_b = 0; init_b < NUMBER_BANKS; init_b=init_b+1)
// begin
// debug_hit_per_bank_mask[init_b] <= 0;
// end
evicted_way_old <= 0;
eviction_wb_old <= 0;
// evicted_way_old <= 0;
// eviction_wb_old <= 0;
global_way_to_evict <= 0;
end else begin
global_way_to_evict <= (update_global_way_to_evict) ? (global_way_to_evict+1) : global_way_to_evict;
state <= new_state;
stored_valid <= new_stored_valid;
if (miss_found) begin
miss_addr <= i_p_addr[send_index_to_bank[miss_bank_index]];
evict_addr <= eviction_addr_per_bank[miss_bank_index];
if (state == CACHE_IDLE) begin
if (miss_found) begin
miss_addr <= i_p_addr[send_index_to_bank[miss_bank_index]];
// evict_addr <= eviction_addr_per_bank[miss_bank_index];
end else begin
miss_addr <= 0;
// evict_addr <= 0;
end
end
final_data_read <= new_final_data_read_Qual;
evicted_way_old <= evicted_way_new;
eviction_wb_old <= eviction_wb;
// evicted_way_old <= evicted_way_new;
// eviction_wb_old <= eviction_wb;
end
end
@@ -281,13 +295,13 @@ module VX_d_cache
generate
for (bank_id = 0; bank_id < CACHE_BANKS; bank_id = bank_id + 1)
begin
wire[31:0] bank_addr = (state == SEND_MEM_REQ) ? evict_addr :
wire[31:0] bank_addr = (state == SEND_MEM_REQ) ? miss_addr :
(state == RECIV_MEM_RSP) ? miss_addr :
i_p_addr[send_index_to_bank[bank_id]];
assign evicted_way_new[bank_id] = (state == SEND_MEM_REQ) ? way_used[bank_id] :
(state == RECIV_MEM_RSP) ? evicted_way_old[bank_id] :
0;
// assign evicted_way_new[bank_id] = (state == SEND_MEM_REQ) ? way_used[bank_id] :
// (state == RECIV_MEM_RSP) ? evicted_way_old[bank_id] :
// 0;
wire[1:0] byte_select = bank_addr[1:0];
wire[OFFSET_SIZE_END:OFFSET_SIZE_START] cache_offset = bank_addr[ADDR_OFFSET_END:ADDR_OFFSET_START];
@@ -344,8 +358,7 @@ module VX_d_cache
.data_evicted (o_m_writedata[bank_id]),
.eviction_wb (eviction_wb[bank_id]), // Something needs to be written back
.fetched_writedata(i_m_readdata[bank_id]), // Data From memory
.evicted_way (evicted_way_new[bank_id]),
.way_use (way_used[bank_id])
.evicted_way (global_way_to_evict)
);
end
@@ -354,7 +367,7 @@ module VX_d_cache
// Mem Rsp
// Req to mem:
assign o_m_evict_addr = evict_addr & MEM_ADDR_REQ_MASK;
assign o_m_evict_addr = (eviction_addr_per_bank[0]) & MEM_ADDR_REQ_MASK; // Could be anything because tag+index are same
assign o_m_read_addr = miss_addr & MEM_ADDR_REQ_MASK;
assign o_m_valid = (state == SEND_MEM_REQ);
assign o_m_read_or_write = (state == SEND_MEM_REQ) && (|eviction_wb);