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authorAlejandro Soto <alejandro@34project.org>2022-11-15 16:28:30 -0600
committerAlejandro Soto <alejandro@34project.org>2022-11-15 16:28:30 -0600
commit1d08cc6aff97a24bffa5ba5b578c52bb545fc393 (patch)
tree84884ab3452692afe143e113d658b313235d4bb1 /rtl/core/mmu/mmu.sv
parent044558e53d50ebd053abc76930723c9d7f606569 (diff)
Rename existing MMU components to MMU arbiter
Diffstat (limited to 'rtl/core/mmu/mmu.sv')
-rw-r--r--rtl/core/mmu/mmu.sv91
1 files changed, 4 insertions, 87 deletions
diff --git a/rtl/core/mmu/mmu.sv b/rtl/core/mmu/mmu.sv
index 5928d00..a4be70e 100644
--- a/rtl/core/mmu/mmu.sv
+++ b/rtl/core/mmu/mmu.sv
@@ -22,93 +22,10 @@ module core_mmu
data_data_rd
);
- enum int unsigned
- {
- INSN,
- DATA
- } master, next_master;
-
- ptr hold_addr;
- word hold_data_wr;
- logic active, hold_start, hold_write, hold_issue, hold_free, transition;
-
//TODO
- assign insn_data_rd = bus_data_rd;
- assign data_data_rd = bus_data_rd;
-
- always_comb begin
- next_master = master;
- if(bus_ready || !active)
- unique case(master)
- DATA: next_master = data_start ? DATA : INSN;
- INSN: next_master = !data_start && !hold_start ? INSN : DATA;
- endcase
-
- // Causa UNOPTFLAT en Verilator con assign
- transition = master != next_master;
- hold_issue = transition && hold_start;
- hold_free = transition || !hold_start;
-
- insn_ready = 0;
- data_ready = 0;
-
- unique case(master)
- INSN: insn_ready = bus_ready;
- DATA: data_ready = bus_ready;
- endcase
-
- unique case(next_master)
- INSN: begin
- bus_addr = insn_addr;
- bus_write = 0;
- bus_start = insn_start;
- bus_data_wr = {32{1'bx}};
- end
-
- DATA: begin
- bus_addr = data_addr;
- bus_write = data_write;
- bus_start = data_start;
- bus_data_wr = data_data_wr;
- end
- endcase
-
- if(hold_issue) begin
- bus_addr = hold_addr;
- bus_write = hold_write;
- bus_start = 1;
- bus_data_wr = hold_data_wr;
- end
- end
-
- always_ff @(posedge clk or negedge rst_n)
- if(!rst_n) begin
- master <= INSN;
- active <= 0;
-
- hold_addr <= 30'b0;
- hold_start <= 0;
- hold_write <= 0;
- hold_data_wr <= 0;
- end else begin
- master <= next_master;
- active <= bus_start || (active && !bus_ready);
-
- if(hold_free)
- unique case(next_master)
- INSN: begin
- hold_addr <= data_addr;
- hold_start <= data_start;
- hold_write <= data_write;
- hold_data_wr <= data_data_wr;
- end
-
- DATA: begin
- hold_addr <= insn_addr;
- hold_start <= insn_start;
- hold_write <= 0;
- end
- endcase
- end
+ core_mmu_arbiter arbiter
+ (
+ .*
+ );
endmodule