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Line 16... |
// You should have received a copy of the GNU General Public
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// You should have received a copy of the GNU General Public
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// License along with this work; if not, write to the Free Software
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// License along with this work; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
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// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
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//
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//
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// ========== Copyright Header End ============================================
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// ========== Copyright Header End ============================================
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`ifdef SIMPLY_RISC_TWEAKS
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`define SIMPLY_RISC_SCANIN .si(0)
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`else
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`define SIMPLY_RISC_SCANIN .si()
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`endif
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////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////
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/*
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/*
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// Module Name: sparc_ifu_lru4
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// Module Name: sparc_ifu_lru4
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// Description:
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// Description:
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// LRU scheduler. Least priority to the last granted
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// LRU scheduler. Least priority to the last granted
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| Line 148... |
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assign used1_nxt = reset ? 4'b0010 : used1_calc;
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assign used1_nxt = reset ? 4'b0010 : used1_calc;
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assign used2_nxt = reset ? 4'b0100 : used2_calc;
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assign used2_nxt = reset ? 4'b0100 : used2_calc;
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assign used3_nxt = reset ? 4'b1000 : used3_calc;
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assign used3_nxt = reset ? 4'b1000 : used3_calc;
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// use 4X4 matrix to hold lru info
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// use 4X4 matrix to hold lru info
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dff #(4) use0_reg(.din (used0_nxt),
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dff_s #(4) use0_reg(.din (used0_nxt),
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.q (used0),
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.q (used0),
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.clk (clk), .se(se), .si(), .so());
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.clk (clk), .se(se), `SIMPLY_RISC_SCANIN, .so());
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dff #(4) use1_reg(.din (used1_nxt),
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dff_s #(4) use1_reg(.din (used1_nxt),
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.q (used1),
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.q (used1),
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.clk (clk), .se(se), .si(), .so());
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.clk (clk), .se(se), `SIMPLY_RISC_SCANIN, .so());
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dff #(4) use2_reg(.din (used2_nxt),
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dff_s #(4) use2_reg(.din (used2_nxt),
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.q (used2),
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.q (used2),
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.clk (clk), .se(se), .si(), .so());
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.clk (clk), .se(se), `SIMPLY_RISC_SCANIN, .so());
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// used3 is lru
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// used3 is lru
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dff #(4) use3_reg(.din (used3_nxt),
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dff_s #(4) use3_reg(.din (used3_nxt),
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.q (used3),
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.q (used3),
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.clk (clk), .se(se), .si(), .so());
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.clk (clk), .se(se), `SIMPLY_RISC_SCANIN, .so());
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assign used23_nxt = used2_nxt | used3_nxt;
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assign used23_nxt = used2_nxt | used3_nxt;
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dff #(4) use23_reg(.din (used23_nxt),
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dff_s #(4) use23_reg(.din (used23_nxt),
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.q (used23),
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.q (used23),
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.clk (clk), .se(se), .si(), .so());
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.clk (clk), .se(se), `SIMPLY_RISC_SCANIN, .so());
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// grant request based on lru
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// grant request based on lru
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// save some loading on req_vec by not doing this
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// save some loading on req_vec by not doing this
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