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- put dependency signals 'imem_dep', 'dmem_dep' and 'mul_dep' into structure for easier debugging

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git-svn-id: http://moon:8086/svn/vhdl/trunk@352 cc03376c-175c-47c8-b038-4cd826a8556b
This commit is contained in:
jens
2009-02-15 11:08:50 +00:00
parent 3057cdd154
commit e874bfa228
2 changed files with 13 additions and 13 deletions
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lib/CPUs/MIPS/src/core/mips_pipeline.vhd
+10 -13
View File
@@ -179,9 +179,6 @@ architecture Behavioral of pipeline is
signal ctrl_lines : ctrl_lines_t;
signal branch_ce : STD_LOGIC;
signal cpu_run : STD_LOGIC;
signal mul_dep : STD_LOGIC;
signal imem_dep : STD_LOGIC;
signal dmem_dep : STD_LOGIC;
signal cop_ctrl : cop_ctrl_in_t;
signal cop_stat : cop_ctrl_out_t;
signal cop_din : word_t;
@@ -214,21 +211,21 @@ begin
cpu_run <= ce;
-- Stall Detection Unit ---------------------------------------------------
sdu.ID_nop <= imem_dep or cop_stat.exc_pending or EX_stage.exc or MEM_stage.exc;
sdu.EX_nop <= mul_dep or ID_stage.nop or ID_stage.exc;
sdu.ID_nop <= sdu.imem_dep or cop_stat.exc_pending or EX_stage.exc or MEM_stage.exc;
sdu.EX_nop <= sdu.mul_dep or ID_stage.nop or ID_stage.exc;
sdu.MEM_nop <= EX_stage.nop or EX_stage.exc;
sdu.WB_nop <= dmem_dep or MEM_stage.nop;
sdu.WB_nop <= sdu.dmem_dep or MEM_stage.nop;
sdu.ID_stall <= dmem_dep or imem_dep or mul_dep or ID_stage.exc;
sdu.EX_stall <= dmem_dep;
sdu.MEM_stall <= dmem_dep;
sdu.ID_stall <= sdu.dmem_dep or sdu.imem_dep or sdu.mul_dep or ID_stage.exc;
sdu.EX_stall <= sdu.dmem_dep;
sdu.MEM_stall <= sdu.dmem_dep;
sdu.WB_stall <= '0';
mul_dep <= ID_stage.ctrl.mul_access and (EX_stage.ctrl.mul_start or mul_busy);
imem_dep <= not imem_rdy;
dmem_dep <= not dmem_rdy and MEM_stage.ctrl.dmem_en;
sdu.mul_dep <= ID_stage.ctrl.mul_access and (EX_stage.ctrl.mul_start or mul_busy);
sdu.imem_dep <= not imem_rdy;
sdu.dmem_dep <= not dmem_rdy and MEM_stage.ctrl.dmem_en;
---------------------------------------------------------------------------
imem_en <= cpu_run and not (mul_dep or dmem_dep or cop_stat.exc_commit);
imem_en <= cpu_run and not (sdu.mul_dep or sdu.dmem_dep or cop_stat.exc_commit);
--------------------------------------------------------------------------
-- Muldiv
lib/CPUs/MIPS/src/core/mips_types.vhd
+3
View File
@@ -220,6 +220,9 @@ package mips_types is
end record;
type sdu_t is record
imem_dep : STD_LOGIC;
dmem_dep : STD_LOGIC;
mul_dep : STD_LOGIC;
ID_nop : STD_LOGIC;
EX_nop : STD_LOGIC;
MEM_nop : STD_LOGIC;