| Line 44... |
Line 44... |
---- Basic types ---------------------------------------------------------------
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---- Basic types ---------------------------------------------------------------
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subtype t_word is std_logic_vector(31 downto 0);
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subtype t_word is std_logic_vector(31 downto 0);
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subtype t_halfword is std_logic_vector(15 downto 0);
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subtype t_halfword is std_logic_vector(15 downto 0);
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subtype t_byte is std_logic_vector(7 downto 0);
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subtype t_byte is std_logic_vector(7 downto 0);
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subtype t_pc is std_logic_vector(31 downto 2);
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subtype t_regindex is std_logic_vector(4 downto 0);
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---- Interface types -----------------------------------------------------------
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type t_cop0_mosi is record
|
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index : t_regindex;
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we : std_logic;
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data : t_word;
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pc_restart : t_pc;
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in_delay_slot : std_logic;
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pipeline_stalled : std_logic;
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exception : std_logic;
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rfe : std_logic;
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unknown_opcode : std_logic;
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missing_cop : std_logic;
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syscall : std_logic;
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stall : std_logic;
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end record t_cop0_mosi;
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type t_cop0_miso is record
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data : t_word;
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kernel : std_logic;
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idcache_enable : std_logic;
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icache_invalidate : std_logic;
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end record t_cop0_miso;
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---- System configuration constants --------------------------------------------
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---- System configuration constants --------------------------------------------
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-- True to use standard-ish MIPS-1 memory map, false to use Plasma's
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-- True to use standard-ish MIPS-1 memory map, false to use Plasma's
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-- (see implementation of function decode_addr below).
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-- (see implementation of function decode_addr below).
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subtype t_addr is std_logic_vector(31 downto 0);
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subtype t_addr is std_logic_vector(31 downto 0);
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subtype t_dword is std_logic_vector(63 downto 0);
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subtype t_dword is std_logic_vector(63 downto 0);
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subtype t_regnum is std_logic_vector(4 downto 0);
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subtype t_regnum is std_logic_vector(4 downto 0);
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type t_rbank is array(0 to 31) of t_word;
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type t_rbank is array(0 to 31) of t_word;
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subtype t_pc is std_logic_vector(31 downto 2);
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-- This is used as a textual shortcut only
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-- This is used as a textual shortcut only
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constant ZERO : t_word := (others => '0');
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constant ZERO : t_word := (others => '0');
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-- control word for ALU
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-- control word for ALU
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type t_alu_control is record
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type t_alu_control is record
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logic_sel : std_logic_vector(1 downto 0);
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logic_sel : std_logic_vector(1 downto 0);
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