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Line 8... |
// Email: admin@ultra-embedded.com
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// Email: admin@ultra-embedded.com
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//
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//
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// License: LGPL
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// License: LGPL
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//-----------------------------------------------------------------
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//-----------------------------------------------------------------
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//
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//
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// Copyright (C) 2011 - 2013 Ultra-Embedded.com
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// Copyright (C) 2011 - 2014 Ultra-Embedded.com
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//
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//
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// This source file may be used and distributed without
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// This source file may be used and distributed without
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// restriction provided that this copyright statement is not
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// restriction provided that this copyright statement is not
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// removed from the file and that any derivative work contains
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// removed from the file and that any derivative work contains
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// the original copyright notice and the associated disclaimer.
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// the original copyright notice and the associated disclaimer.
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| Line 76... |
Line 76... |
`include "altor32_funcs.v"
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`include "altor32_funcs.v"
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//-------------------------------------------------------------------
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//-------------------------------------------------------------------
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// Outstanding memory access logic
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// Outstanding memory access logic
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//-------------------------------------------------------------------
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//-------------------------------------------------------------------
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reg v_inst_load;
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reg inst_load_r;
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reg v_inst_store;
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reg inst_store_r;
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always @ *
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always @ *
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begin
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begin
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load_pending_o = load_pending_i;
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load_pending_o = load_pending_i;
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store_pending_o = store_pending_i;
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store_pending_o = store_pending_i;
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stall_o = 1'b0;
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stall_o = 1'b0;
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write_result_o = 1'b0;
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write_result_o = 1'b0;
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// Is this instruction a load or store?
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// Is this instruction a load or store?
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v_inst_load = is_load_operation(opcode_i);
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inst_load_r = is_load_operation(opcode_i);
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v_inst_store = is_store_operation(opcode_i);
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inst_store_r = is_store_operation(opcode_i);
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// Store operation just completed?
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// Store operation just completed?
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if (store_pending_o & mem_ack_i & ~mem_access_i)
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if (store_pending_o & mem_ack_i & ~mem_access_i)
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begin
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begin
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`ifdef CONF_CORE_DEBUG
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`ifdef CONF_CORE_DEBUG
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| Line 142... |
Line 142... |
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// If load or store in progress (and this instruction is valid)
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// If load or store in progress (and this instruction is valid)
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if ((load_pending_o | store_pending_o) & opcode_valid_i)
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if ((load_pending_o | store_pending_o) & opcode_valid_i)
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begin
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begin
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// Load or store whilst memory bus busy
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// Load or store whilst memory bus busy
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if (v_inst_load | v_inst_store)
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if (inst_load_r | inst_store_r)
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begin
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begin
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`ifdef CONF_CORE_DEBUG
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`ifdef CONF_CORE_DEBUG
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$display(" Data bus already busy, stall (load_pending_o=%d, store_pending_o=%d)", load_pending_o, store_pending_o);
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$display(" Data bus already busy, stall (load_pending_o=%d, store_pending_o=%d)", load_pending_o, store_pending_o);
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`endif
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`endif
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// Stall!
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// Stall!
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