From f3b18ead59ae02f95dabbf0a1dea40873a816975 Mon Sep 17 00:00:00 2001
From: Alejandro Soto <alejandro@34project.org>
Date: Sun, 21 Jan 2024 06:23:46 -0600
Subject: rtl: refactor filenames and directory hierarchy

---
 rtl/core/mmu/arbiter.sv | 132 ------------------------------------------------
 1 file changed, 132 deletions(-)
 delete mode 100644 rtl/core/mmu/arbiter.sv

(limited to 'rtl/core/mmu/arbiter.sv')

diff --git a/rtl/core/mmu/arbiter.sv b/rtl/core/mmu/arbiter.sv
deleted file mode 100644
index b0da7c8..0000000
--- a/rtl/core/mmu/arbiter.sv
+++ /dev/null
@@ -1,132 +0,0 @@
-module core_mmu_arbiter
-(
-	input  logic      clk,
-	                  rst_n,
-
-	input  logic      bus_ready,
-	                  bus_ex_fail,
-	input  word       bus_data_rd,
-	                  data_data_wr,
-	input  ptr        insn_addr,
-	                  data_addr,
-	input  logic      insn_start,
-	                  data_start,
-	                  data_write,
-	                  data_ex_lock,
-	input  logic[3:0] data_data_be,
-
-	output word       bus_data_wr,
-	output logic[3:0] bus_data_be,
-	output ptr        bus_addr,
-	output logic      bus_start,
-	                  bus_write,
-	                  bus_ex_lock,
-	                  insn_ready,
-	                  data_ready,
-	                  data_ex_fail,
-	output word       insn_data_rd,
-	                  data_data_rd
-);
-
-	enum int unsigned
-	{
-		INSN,
-		DATA
-	} master, next_master;
-
-	ptr hold_addr;
-	word hold_data_wr;
-	logic active, hold_ex_lock, hold_start, hold_write, hold_issue, hold_free, transition;
-	logic[3:0] hold_data_be;
-
-	assign data_ex_fail = bus_ex_fail;
-	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
-
-		bus_data_wr = data_data_wr;
-		unique case(next_master)
-			INSN: begin
-				bus_addr = insn_addr;
-				bus_write = 0;
-				bus_start = insn_start;
-				bus_data_be = 4'b1111;
-				bus_ex_lock = 0;
-			end
-
-			DATA: begin
-				bus_addr = data_addr;
-				bus_write = data_write;
-				bus_start = data_start;
-				bus_data_be = data_data_be;
-				bus_ex_lock = data_ex_lock;
-			end
-		endcase
-
-		if(hold_issue) begin
-			bus_addr = hold_addr;
-			bus_write = hold_write;
-			bus_start = 1;
-			bus_data_wr = hold_data_wr;
-			bus_data_be = hold_data_be;
-			bus_ex_lock = hold_ex_lock;
-		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;
-			hold_data_be <= 0;
-			hold_ex_lock <= 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;
-						hold_data_be <= data_data_be;
-						hold_ex_lock <= data_ex_lock;
-					end
-
-					DATA: begin
-						hold_addr <= insn_addr;
-						hold_start <= insn_start;
-						hold_write <= 0;
-						hold_data_be <= 4'b1111;
-						hold_ex_lock <= 0;
-					end
-				endcase
-		end
-
-endmodule
-- 
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