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- common functions lg2() and po2() added

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- reworked cop0_ctrl_in/out types

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git-svn-id: http://moon:8086/svn/vhdl/trunk@388 cc03376c-175c-47c8-b038-4cd826a8556b
This commit is contained in:
jens
2009-03-15 20:09:27 +00:00
parent a332b172b3
commit b44d2ba1f9
1 changed files with 49 additions and 33 deletions
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lib/CPUs/MIPS/src/core/mips_types.vhd
+49 -33
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@@ -23,8 +23,8 @@
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.numeric_std.ALL;
use IEEE.NUMERIC_STD.ALL;
use IEEE.MATH_REAL.ALL;
--------------------------------------------------------------------------
package mips_types is
@@ -150,6 +150,29 @@ package mips_types is
alu_lts
);
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;
WB_nop : STD_LOGIC;
ID_stall : STD_LOGIC;
EX_stall : STD_LOGIC;
MEM_stall : STD_LOGIC;
WB_stall : STD_LOGIC;
end record;
type hdu_t is record
alu_fwd_a_ex : boolean;
alu_fwd_a_mem : boolean;
alu_fwd_a_wb : boolean;
alu_fwd_b_ex : boolean;
alu_fwd_b_mem : boolean;
alu_fwd_b_wb : boolean;
end record;
type alu_flags_t is record
c : STD_LOGIC;
uvf : STD_LOGIC;
@@ -196,7 +219,9 @@ package mips_types is
cause : word_t;
end record;
type cop_ctrl_in_t is record
type cop0_ctrl_in_t is record
sdu : sdu_t;
events : event_t;
bd_wb : STD_LOGIC;
epc_mem : word_t;
epc_wb : word_t;
@@ -205,43 +230,16 @@ package mips_types is
exc_left : STD_LOGIC;
end record;
type cop_ctrl_out_t is record
type cop0_ctrl_out_t is record
RE : STD_LOGIC;
ee : STD_LOGIC;
ec : STD_LOGIC;
exc_commit : STD_LOGIC;
exc_pending : STD_LOGIC;
exc_exit : STD_LOGIC;
reg_write : STD_LOGIC;
cop_read : STD_LOGIC;
user_mode : STD_LOGIC;
int : STD_LOGIC;
exc_vec : word_t;
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;
WB_nop : STD_LOGIC;
ID_stall : STD_LOGIC;
EX_stall : STD_LOGIC;
MEM_stall : STD_LOGIC;
WB_stall : STD_LOGIC;
end record;
type hdu_t is record
alu_fwd_a_ex : boolean;
alu_fwd_a_mem : boolean;
alu_fwd_a_wb : boolean;
alu_fwd_b_ex : boolean;
alu_fwd_b_mem : boolean;
alu_fwd_b_wb : boolean;
end record;
type alu_ctrl_t is record
outsel : alu_outsel_t;
add : STD_LOGIC;
@@ -307,6 +305,7 @@ package mips_types is
shamt : shamt_t;
ctrl : ctrl_lines_t;
reg_write : STD_LOGIC;
cop_read : STD_LOGIC;
reg_a_rptr : reg_ptr_t;
reg_b_rptr : reg_ptr_t;
reg_a : word_t;
@@ -331,6 +330,7 @@ package mips_types is
alu_flags : alu_flags_t;
result : word_t;
reg_write : STD_LOGIC;
cop_read : STD_LOGIC;
wreg_we : STD_LOGIC;
reg_wptr : reg_ptr_t;
reg_a_rptr : reg_ptr_t;
@@ -382,6 +382,9 @@ package mips_types is
function event_is_active(e : event_t) return std_logic;
function "or" (a, b : event_t) return event_t;
function lg2(x : natural) return natural;
function po2(x : natural) return natural;
end mips_types;
--------------------------------------------------------------------------
@@ -572,6 +575,7 @@ package body mips_types is
end events_clr;
--------------------------------------------------------------------------
function event_is_active(e : event_t) return std_logic is
variable result : std_logic;
begin
@@ -595,6 +599,7 @@ package body mips_types is
end event_is_active;
--------------------------------------------------------------------------
function "or" (a, b : event_t) return event_t is
variable result : event_t;
begin
@@ -616,7 +621,18 @@ package body mips_types is
end "or";
--------------------------------------------------------------------------
end mips_types;
function lg2(x : natural) return natural is
begin
return natural(ceil(log2(real(x))));
end lg2;
--------------------------------------------------------------------------
function po2(x : natural) return natural is
begin
return 2**lg2(x);
end po2;
--------------------------------------------------------------------------
--------------------------------------------------------------------------
end mips_types;