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820 lines
31 KiB
VHDL
820 lines
31 KiB
VHDL
library ieee;
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use ieee.std_logic_1164.all;
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use ieee.numeric_std.all;
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library work;
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use work.utils.all;
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use work.decode_types.all;
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package common is
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-- Processor Version Number
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constant PVR_MICROWATT : std_ulogic_vector(31 downto 0) := x"00630000";
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-- MSR bit numbers
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constant MSR_SF : integer := (63 - 0); -- Sixty-Four bit mode
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constant MSR_EE : integer := (63 - 48); -- External interrupt Enable
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constant MSR_PR : integer := (63 - 49); -- PRoblem state
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constant MSR_FP : integer := (63 - 50); -- Floating Point available
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constant MSR_FE0 : integer := (63 - 52); -- Floating Exception mode
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constant MSR_SE : integer := (63 - 53); -- Single-step bit of TE field
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constant MSR_BE : integer := (63 - 54); -- Branch trace bit of TE field
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constant MSR_FE1 : integer := (63 - 55); -- Floating Exception mode
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constant MSR_IR : integer := (63 - 58); -- Instruction Relocation
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constant MSR_DR : integer := (63 - 59); -- Data Relocation
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constant MSR_PMM : integer := (63 - 61); -- Performance Monitor Mark
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constant MSR_RI : integer := (63 - 62); -- Recoverable Interrupt
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constant MSR_LE : integer := (63 - 63); -- Little Endian
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-- SPR numbers
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subtype spr_num_t is integer range 0 to 1023;
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function decode_spr_num(insn: std_ulogic_vector(31 downto 0)) return spr_num_t;
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constant SPR_XER : spr_num_t := 1;
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constant SPR_LR : spr_num_t := 8;
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constant SPR_CTR : spr_num_t := 9;
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constant SPR_TAR : spr_num_t := 815;
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constant SPR_DSISR : spr_num_t := 18;
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constant SPR_DAR : spr_num_t := 19;
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constant SPR_TB : spr_num_t := 268;
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constant SPR_TBU : spr_num_t := 269;
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constant SPR_DEC : spr_num_t := 22;
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constant SPR_SRR0 : spr_num_t := 26;
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constant SPR_SRR1 : spr_num_t := 27;
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constant SPR_CFAR : spr_num_t := 28;
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constant SPR_HSRR0 : spr_num_t := 314;
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constant SPR_HSRR1 : spr_num_t := 315;
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constant SPR_SPRG0 : spr_num_t := 272;
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constant SPR_SPRG1 : spr_num_t := 273;
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constant SPR_SPRG2 : spr_num_t := 274;
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constant SPR_SPRG3 : spr_num_t := 275;
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constant SPR_SPRG3U : spr_num_t := 259;
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constant SPR_HSPRG0 : spr_num_t := 304;
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constant SPR_HSPRG1 : spr_num_t := 305;
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constant SPR_PID : spr_num_t := 48;
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constant SPR_PTCR : spr_num_t := 464;
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constant SPR_PVR : spr_num_t := 287;
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-- PMU registers
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constant SPR_UPMC1 : spr_num_t := 771;
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constant SPR_UPMC2 : spr_num_t := 772;
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constant SPR_UPMC3 : spr_num_t := 773;
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constant SPR_UPMC4 : spr_num_t := 774;
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constant SPR_UPMC5 : spr_num_t := 775;
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constant SPR_UPMC6 : spr_num_t := 776;
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constant SPR_UMMCR0 : spr_num_t := 779;
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constant SPR_UMMCR1 : spr_num_t := 782;
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constant SPR_UMMCR2 : spr_num_t := 769;
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constant SPR_UMMCRA : spr_num_t := 770;
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constant SPR_USIER : spr_num_t := 768;
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constant SPR_USIAR : spr_num_t := 780;
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constant SPR_USDAR : spr_num_t := 781;
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constant SPR_PMC1 : spr_num_t := 787;
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constant SPR_PMC2 : spr_num_t := 788;
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constant SPR_PMC3 : spr_num_t := 789;
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constant SPR_PMC4 : spr_num_t := 790;
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constant SPR_PMC5 : spr_num_t := 791;
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constant SPR_PMC6 : spr_num_t := 792;
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constant SPR_MMCR0 : spr_num_t := 795;
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constant SPR_MMCR1 : spr_num_t := 798;
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constant SPR_MMCR2 : spr_num_t := 785;
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constant SPR_MMCRA : spr_num_t := 786;
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constant SPR_SIER : spr_num_t := 784;
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constant SPR_SIAR : spr_num_t := 796;
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constant SPR_SDAR : spr_num_t := 797;
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-- GPR indices in the register file (GPR only)
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subtype gpr_index_t is std_ulogic_vector(4 downto 0);
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-- Extended GPR index (can hold an SPR or a FPR)
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subtype gspr_index_t is std_ulogic_vector(6 downto 0);
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-- FPR indices
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subtype fpr_index_t is std_ulogic_vector(4 downto 0);
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-- Some SPRs are stored in the register file, they use the magic
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-- GPR numbers above 31.
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--
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-- The function fast_spr_num() returns the corresponding fast
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-- pseudo-GPR number for a given SPR number. The result MSB
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-- indicates if this is indeed a fast SPR. If clear, then
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-- the SPR is not stored in the GPR file.
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--
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-- FPRs are also stored in the register file, using GSPR
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-- numbers from 64 to 95.
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--
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function fast_spr_num(spr: spr_num_t) return gspr_index_t;
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-- Indices conversion functions
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function gspr_to_gpr(i: gspr_index_t) return gpr_index_t;
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function gpr_to_gspr(i: gpr_index_t) return gspr_index_t;
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function gpr_or_spr_to_gspr(g: gpr_index_t; s: gspr_index_t) return gspr_index_t;
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function is_fast_spr(s: gspr_index_t) return std_ulogic;
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function fpr_to_gspr(f: fpr_index_t) return gspr_index_t;
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-- The XER is split: the common bits (CA, OV, SO, OV32 and CA32) are
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-- in the CR file as a kind of CR extension (with a separate write
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-- control). The rest is stored in ctrl_t (effectively in execute1).
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type xer_common_t is record
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ca : std_ulogic;
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ca32 : std_ulogic;
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ov : std_ulogic;
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ov32 : std_ulogic;
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so : std_ulogic;
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end record;
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constant xerc_init : xer_common_t := (others => '0');
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subtype spr_selector is std_ulogic_vector(2 downto 0);
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type spr_id is record
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sel : spr_selector;
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valid : std_ulogic;
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ispmu : std_ulogic;
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end record;
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constant spr_id_init : spr_id := (sel => "000", others => '0');
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constant SPRSEL_TB : spr_selector := 3x"0";
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constant SPRSEL_TBU : spr_selector := 3x"1";
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constant SPRSEL_DEC : spr_selector := 3x"2";
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constant SPRSEL_PVR : spr_selector := 3x"3";
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constant SPRSEL_LOGA : spr_selector := 3x"4";
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constant SPRSEL_LOGD : spr_selector := 3x"5";
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constant SPRSEL_CFAR : spr_selector := 3x"6";
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constant SPRSEL_XER : spr_selector := 3x"7";
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-- FPSCR bit numbers
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constant FPSCR_FX : integer := 63 - 32;
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constant FPSCR_FEX : integer := 63 - 33;
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constant FPSCR_VX : integer := 63 - 34;
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constant FPSCR_OX : integer := 63 - 35;
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constant FPSCR_UX : integer := 63 - 36;
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constant FPSCR_ZX : integer := 63 - 37;
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constant FPSCR_XX : integer := 63 - 38;
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constant FPSCR_VXSNAN : integer := 63 - 39;
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constant FPSCR_VXISI : integer := 63 - 40;
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constant FPSCR_VXIDI : integer := 63 - 41;
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constant FPSCR_VXZDZ : integer := 63 - 42;
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constant FPSCR_VXIMZ : integer := 63 - 43;
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constant FPSCR_VXVC : integer := 63 - 44;
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constant FPSCR_FR : integer := 63 - 45;
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constant FPSCR_FI : integer := 63 - 46;
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constant FPSCR_C : integer := 63 - 47;
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constant FPSCR_FL : integer := 63 - 48;
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constant FPSCR_FG : integer := 63 - 49;
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constant FPSCR_FE : integer := 63 - 50;
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constant FPSCR_FU : integer := 63 - 51;
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constant FPSCR_VXSOFT : integer := 63 - 53;
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constant FPSCR_VXSQRT : integer := 63 - 54;
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constant FPSCR_VXCVI : integer := 63 - 55;
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constant FPSCR_VE : integer := 63 - 56;
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constant FPSCR_OE : integer := 63 - 57;
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constant FPSCR_UE : integer := 63 - 58;
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constant FPSCR_ZE : integer := 63 - 59;
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constant FPSCR_XE : integer := 63 - 60;
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constant FPSCR_NI : integer := 63 - 61;
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constant FPSCR_RN : integer := 63 - 63;
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-- Real addresses
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-- REAL_ADDR_BITS is the number of real address bits that we store
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constant REAL_ADDR_BITS : positive := 56;
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subtype real_addr_t is std_ulogic_vector(REAL_ADDR_BITS - 1 downto 0);
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function addr_to_real(addr: std_ulogic_vector(63 downto 0)) return real_addr_t;
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-- Used for tracking instruction completion and pending register writes
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constant TAG_COUNT : positive := 4;
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constant TAG_NUMBER_BITS : natural := log2(TAG_COUNT);
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subtype tag_number_t is integer range 0 to TAG_COUNT - 1;
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subtype tag_index_t is unsigned(TAG_NUMBER_BITS - 1 downto 0);
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type instr_tag_t is record
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tag : tag_number_t;
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valid : std_ulogic;
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end record;
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constant instr_tag_init : instr_tag_t := (tag => 0, valid => '0');
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function tag_match(tag1 : instr_tag_t; tag2 : instr_tag_t) return boolean;
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subtype intr_vector_t is integer range 0 to 16#fff#;
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-- For now, fixed 16 sources, make this either a parametric
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-- package of some sort or an unconstrainted array.
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type ics_to_icp_t is record
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-- Level interrupts only, ICS just keeps prsenting the
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-- highest priority interrupt. Once handling edge, something
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-- smarter involving handshake & reject support will be needed
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src : std_ulogic_vector(3 downto 0);
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pri : std_ulogic_vector(7 downto 0);
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end record;
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-- This needs to die...
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type ctrl_t is record
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tb: std_ulogic_vector(63 downto 0);
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dec: std_ulogic_vector(63 downto 0);
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msr: std_ulogic_vector(63 downto 0);
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cfar: std_ulogic_vector(63 downto 0);
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xer_low: std_ulogic_vector(17 downto 0);
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end record;
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constant ctrl_t_init : ctrl_t :=
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(xer_low => 18x"0", others => (others => '0'));
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type Fetch1ToIcacheType is record
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req: std_ulogic;
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virt_mode : std_ulogic;
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priv_mode : std_ulogic;
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big_endian : std_ulogic;
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stop_mark: std_ulogic;
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predicted : std_ulogic;
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pred_ntaken : std_ulogic;
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nia: std_ulogic_vector(63 downto 0);
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end record;
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type IcacheToDecode1Type is record
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valid: std_ulogic;
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stop_mark: std_ulogic;
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fetch_failed: std_ulogic;
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nia: std_ulogic_vector(63 downto 0);
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insn: std_ulogic_vector(31 downto 0);
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big_endian: std_ulogic;
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next_predicted: std_ulogic;
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next_pred_ntaken: std_ulogic;
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end record;
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type IcacheEventType is record
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icache_miss : std_ulogic;
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itlb_miss_resolved : std_ulogic;
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end record;
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type Decode1ToDecode2Type is record
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valid: std_ulogic;
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stop_mark : std_ulogic;
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nia: std_ulogic_vector(63 downto 0);
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insn: std_ulogic_vector(31 downto 0);
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ispr1: gspr_index_t; -- (G)SPR used for branch condition (CTR) or mfspr
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ispr2: gspr_index_t; -- (G)SPR used for branch target (CTR, LR, TAR)
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ispro: gspr_index_t; -- (G)SPR written with LR or CTR
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decode: decode_rom_t;
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br_pred: std_ulogic; -- Branch was predicted to be taken
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big_endian: std_ulogic;
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spr_info : spr_id;
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end record;
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constant Decode1ToDecode2Init : Decode1ToDecode2Type :=
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(valid => '0', stop_mark => '0', nia => (others => '0'), insn => (others => '0'),
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ispr1 => (others => '0'), ispr2 => (others => '0'), ispro => (others => '0'),
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decode => decode_rom_init, br_pred => '0', big_endian => '0',
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spr_info => spr_id_init);
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type Decode1ToFetch1Type is record
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redirect : std_ulogic;
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redirect_nia : std_ulogic_vector(63 downto 0);
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end record;
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type bypass_data_t is record
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tag : instr_tag_t;
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data : std_ulogic_vector(63 downto 0);
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end record;
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constant bypass_data_init : bypass_data_t := (tag => instr_tag_init, data => (others => '0'));
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type cr_bypass_data_t is record
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tag : instr_tag_t;
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data : std_ulogic_vector(31 downto 0);
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end record;
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constant cr_bypass_data_init : cr_bypass_data_t := (tag => instr_tag_init, data => (others => '0'));
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type Decode2ToExecute1Type is record
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valid: std_ulogic;
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unit : unit_t;
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fac : facility_t;
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insn_type: insn_type_t;
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nia: std_ulogic_vector(63 downto 0);
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instr_tag : instr_tag_t;
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write_reg: gspr_index_t;
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write_reg_enable: std_ulogic;
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read_reg1: gspr_index_t;
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read_reg2: gspr_index_t;
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read_reg3: gspr_index_t;
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read_data1: std_ulogic_vector(63 downto 0);
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read_data2: std_ulogic_vector(63 downto 0);
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read_data3: std_ulogic_vector(63 downto 0);
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cr: std_ulogic_vector(31 downto 0);
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xerc: xer_common_t;
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lr: std_ulogic;
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br_abs: std_ulogic;
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rc: std_ulogic;
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oe: std_ulogic;
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invert_a: std_ulogic;
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addm1 : std_ulogic;
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invert_out: std_ulogic;
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input_carry: carry_in_t;
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output_carry: std_ulogic;
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input_cr: std_ulogic;
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output_cr: std_ulogic;
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output_xer: std_ulogic;
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is_32bit: std_ulogic;
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is_signed: std_ulogic;
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insn: std_ulogic_vector(31 downto 0);
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data_len: std_ulogic_vector(3 downto 0);
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byte_reverse : std_ulogic;
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sign_extend : std_ulogic; -- do we need to sign extend?
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update : std_ulogic; -- is this an update instruction?
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reserve : std_ulogic; -- set for larx/stcx
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br_pred : std_ulogic;
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result_sel : std_ulogic_vector(2 downto 0); -- select source of result
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sub_select : std_ulogic_vector(2 downto 0); -- sub-result selection
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repeat : std_ulogic; -- set if instruction is cracked into two ops
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second : std_ulogic; -- set if this is the second op
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spr_select : spr_id;
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end record;
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constant Decode2ToExecute1Init : Decode2ToExecute1Type :=
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(valid => '0', unit => NONE, fac => NONE, insn_type => OP_ILLEGAL, instr_tag => instr_tag_init,
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write_reg_enable => '0',
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lr => '0', br_abs => '0', rc => '0', oe => '0', invert_a => '0', addm1 => '0',
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invert_out => '0', input_carry => ZERO, output_carry => '0', input_cr => '0',
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output_cr => '0', output_xer => '0',
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is_32bit => '0', is_signed => '0', xerc => xerc_init, reserve => '0', br_pred => '0',
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byte_reverse => '0', sign_extend => '0', update => '0', nia => (others => '0'),
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read_data1 => (others => '0'), read_data2 => (others => '0'), read_data3 => (others => '0'),
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cr => (others => '0'), insn => (others => '0'), data_len => (others => '0'),
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result_sel => "000", sub_select => "000",
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repeat => '0', second => '0', spr_select => spr_id_init,
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others => (others => '0'));
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type MultiplyInputType is record
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valid: std_ulogic;
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data1: std_ulogic_vector(63 downto 0);
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data2: std_ulogic_vector(63 downto 0);
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addend: std_ulogic_vector(127 downto 0);
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is_32bit: std_ulogic;
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not_result: std_ulogic;
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end record;
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constant MultiplyInputInit : MultiplyInputType := (valid => '0',
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is_32bit => '0', not_result => '0',
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others => (others => '0'));
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type MultiplyOutputType is record
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valid: std_ulogic;
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result: std_ulogic_vector(127 downto 0);
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overflow : std_ulogic;
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end record;
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constant MultiplyOutputInit : MultiplyOutputType := (valid => '0', overflow => '0',
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others => (others => '0'));
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type Execute1ToDividerType is record
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valid: std_ulogic;
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flush: std_ulogic;
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dividend: std_ulogic_vector(63 downto 0);
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divisor: std_ulogic_vector(63 downto 0);
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is_signed: std_ulogic;
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is_32bit: std_ulogic;
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is_extended: std_ulogic;
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is_modulus: std_ulogic;
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neg_result: std_ulogic;
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end record;
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constant Execute1ToDividerInit: Execute1ToDividerType := (
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dividend => 64x"0", divisor => 64x"0", others => '0');
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type PMUEventType is record
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no_instr_avail : std_ulogic;
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dispatch : std_ulogic;
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ext_interrupt : std_ulogic;
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instr_complete : std_ulogic;
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fp_complete : std_ulogic;
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ld_complete : std_ulogic;
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st_complete : std_ulogic;
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br_taken_complete : std_ulogic;
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br_mispredict : std_ulogic;
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ipref_discard : std_ulogic;
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itlb_miss : std_ulogic;
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itlb_miss_resolved : std_ulogic;
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icache_miss : std_ulogic;
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dc_miss_resolved : std_ulogic;
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dc_load_miss : std_ulogic;
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dc_ld_miss_resolved : std_ulogic;
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dc_store_miss : std_ulogic;
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dtlb_miss : std_ulogic;
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dtlb_miss_resolved : std_ulogic;
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ld_miss_nocache : std_ulogic;
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ld_fill_nocache : std_ulogic;
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end record;
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constant PMUEventInit : PMUEventType := (others => '0');
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type Execute1ToPMUType is record
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mfspr : std_ulogic;
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mtspr : std_ulogic;
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spr_num : std_ulogic_vector(4 downto 0);
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spr_val : std_ulogic_vector(63 downto 0);
|
|
tbbits : std_ulogic_vector(3 downto 0); -- event bits from timebase
|
|
pmm_msr : std_ulogic; -- PMM bit from MSR
|
|
pr_msr : std_ulogic; -- PR bit from MSR
|
|
run : std_ulogic;
|
|
nia : std_ulogic_vector(63 downto 0);
|
|
addr : std_ulogic_vector(63 downto 0);
|
|
addr_v : std_ulogic;
|
|
occur : PMUEventType;
|
|
end record;
|
|
|
|
type PMUToExecute1Type is record
|
|
spr_val : std_ulogic_vector(63 downto 0);
|
|
intr : std_ulogic;
|
|
end record;
|
|
|
|
type Decode2ToRegisterFileType is record
|
|
read1_enable : std_ulogic;
|
|
read1_reg : gspr_index_t;
|
|
read2_enable : std_ulogic;
|
|
read2_reg : gspr_index_t;
|
|
read3_enable : std_ulogic;
|
|
read3_reg : gspr_index_t;
|
|
end record;
|
|
|
|
type RegisterFileToDecode2Type is record
|
|
read1_data : std_ulogic_vector(63 downto 0);
|
|
read2_data : std_ulogic_vector(63 downto 0);
|
|
read3_data : std_ulogic_vector(63 downto 0);
|
|
end record;
|
|
|
|
type Decode2ToCrFileType is record
|
|
read : std_ulogic;
|
|
end record;
|
|
|
|
type CrFileToDecode2Type is record
|
|
read_cr_data : std_ulogic_vector(31 downto 0);
|
|
read_xerc_data : xer_common_t;
|
|
end record;
|
|
|
|
type Execute1ToLoadstore1Type is record
|
|
valid : std_ulogic;
|
|
op : insn_type_t; -- what ld/st or m[tf]spr or TLB op to do
|
|
nia : std_ulogic_vector(63 downto 0);
|
|
insn : std_ulogic_vector(31 downto 0);
|
|
instr_tag : instr_tag_t;
|
|
addr1 : std_ulogic_vector(63 downto 0);
|
|
addr2 : std_ulogic_vector(63 downto 0);
|
|
data : std_ulogic_vector(63 downto 0); -- data to write, unused for read
|
|
write_reg : gspr_index_t;
|
|
length : std_ulogic_vector(3 downto 0);
|
|
ci : std_ulogic; -- cache-inhibited load/store
|
|
byte_reverse : std_ulogic;
|
|
sign_extend : std_ulogic; -- do we need to sign extend?
|
|
update : std_ulogic; -- is this an update instruction?
|
|
xerc : xer_common_t;
|
|
reserve : std_ulogic; -- set for larx/stcx.
|
|
rc : std_ulogic; -- set for stcx.
|
|
virt_mode : std_ulogic; -- do translation through TLB
|
|
priv_mode : std_ulogic; -- privileged mode (MSR[PR] = 0)
|
|
mode_32bit : std_ulogic; -- trim addresses to 32 bits
|
|
is_32bit : std_ulogic;
|
|
repeat : std_ulogic;
|
|
second : std_ulogic;
|
|
e2stall : std_ulogic;
|
|
msr : std_ulogic_vector(63 downto 0);
|
|
end record;
|
|
constant Execute1ToLoadstore1Init : Execute1ToLoadstore1Type :=
|
|
(valid => '0', op => OP_ILLEGAL, ci => '0', byte_reverse => '0',
|
|
sign_extend => '0', update => '0', xerc => xerc_init,
|
|
reserve => '0', rc => '0', virt_mode => '0', priv_mode => '0',
|
|
nia => (others => '0'), insn => (others => '0'),
|
|
instr_tag => instr_tag_init,
|
|
addr1 => (others => '0'), addr2 => (others => '0'), data => (others => '0'),
|
|
write_reg => (others => '0'),
|
|
length => (others => '0'),
|
|
mode_32bit => '0', is_32bit => '0',
|
|
repeat => '0', second => '0', e2stall => '0',
|
|
msr => (others => '0'));
|
|
|
|
type Loadstore1ToExecute1Type is record
|
|
busy : std_ulogic;
|
|
l2stall : std_ulogic;
|
|
end record;
|
|
|
|
type Loadstore1ToDcacheType is record
|
|
valid : std_ulogic;
|
|
hold : std_ulogic;
|
|
load : std_ulogic; -- is this a load
|
|
dcbz : std_ulogic;
|
|
nc : std_ulogic;
|
|
reserve : std_ulogic;
|
|
atomic : std_ulogic; -- part of a multi-transfer atomic op
|
|
atomic_last : std_ulogic;
|
|
virt_mode : std_ulogic;
|
|
priv_mode : std_ulogic;
|
|
addr : std_ulogic_vector(63 downto 0);
|
|
data : std_ulogic_vector(63 downto 0); -- valid the cycle after .valid = 1
|
|
byte_sel : std_ulogic_vector(7 downto 0);
|
|
end record;
|
|
|
|
type DcacheToLoadstore1Type is record
|
|
valid : std_ulogic;
|
|
data : std_ulogic_vector(63 downto 0);
|
|
store_done : std_ulogic;
|
|
error : std_ulogic;
|
|
cache_paradox : std_ulogic;
|
|
end record;
|
|
|
|
type DcacheEventType is record
|
|
load_miss : std_ulogic;
|
|
store_miss : std_ulogic;
|
|
dcache_refill : std_ulogic;
|
|
dtlb_miss : std_ulogic;
|
|
dtlb_miss_resolved : std_ulogic;
|
|
end record;
|
|
|
|
type Loadstore1ToMmuType is record
|
|
valid : std_ulogic;
|
|
tlbie : std_ulogic;
|
|
slbia : std_ulogic;
|
|
mtspr : std_ulogic;
|
|
iside : std_ulogic;
|
|
load : std_ulogic;
|
|
priv : std_ulogic;
|
|
sprn : std_ulogic_vector(9 downto 0);
|
|
addr : std_ulogic_vector(63 downto 0);
|
|
rs : std_ulogic_vector(63 downto 0);
|
|
end record;
|
|
|
|
type MmuToLoadstore1Type is record
|
|
done : std_ulogic;
|
|
err : std_ulogic;
|
|
invalid : std_ulogic;
|
|
badtree : std_ulogic;
|
|
segerr : std_ulogic;
|
|
perm_error : std_ulogic;
|
|
rc_error : std_ulogic;
|
|
sprval : std_ulogic_vector(63 downto 0);
|
|
end record;
|
|
|
|
type MmuToDcacheType is record
|
|
valid : std_ulogic;
|
|
tlbie : std_ulogic;
|
|
doall : std_ulogic;
|
|
tlbld : std_ulogic;
|
|
addr : std_ulogic_vector(63 downto 0);
|
|
pte : std_ulogic_vector(63 downto 0);
|
|
end record;
|
|
|
|
type DcacheToMmuType is record
|
|
stall : std_ulogic;
|
|
done : std_ulogic;
|
|
err : std_ulogic;
|
|
data : std_ulogic_vector(63 downto 0);
|
|
end record;
|
|
|
|
type MmuToIcacheType is record
|
|
tlbld : std_ulogic;
|
|
tlbie : std_ulogic;
|
|
doall : std_ulogic;
|
|
addr : std_ulogic_vector(63 downto 0);
|
|
pte : std_ulogic_vector(63 downto 0);
|
|
end record;
|
|
|
|
type Loadstore1ToWritebackType is record
|
|
valid : std_ulogic;
|
|
instr_tag : instr_tag_t;
|
|
write_enable: std_ulogic;
|
|
write_reg : gspr_index_t;
|
|
write_data : std_ulogic_vector(63 downto 0);
|
|
xerc : xer_common_t;
|
|
rc : std_ulogic;
|
|
store_done : std_ulogic;
|
|
interrupt : std_ulogic;
|
|
intr_vec : intr_vector_t;
|
|
srr0: std_ulogic_vector(63 downto 0);
|
|
srr1: std_ulogic_vector(15 downto 0);
|
|
end record;
|
|
constant Loadstore1ToWritebackInit : Loadstore1ToWritebackType :=
|
|
(valid => '0', instr_tag => instr_tag_init, write_enable => '0',
|
|
write_reg => (others => '0'), write_data => (others => '0'),
|
|
xerc => xerc_init, rc => '0', store_done => '0',
|
|
interrupt => '0', intr_vec => 0,
|
|
srr0 => (others => '0'), srr1 => (others => '0'));
|
|
|
|
type Loadstore1EventType is record
|
|
load_complete : std_ulogic;
|
|
store_complete : std_ulogic;
|
|
itlb_miss : std_ulogic;
|
|
end record;
|
|
|
|
type Execute1ToWritebackType is record
|
|
valid: std_ulogic;
|
|
instr_tag : instr_tag_t;
|
|
rc : std_ulogic;
|
|
mode_32bit : std_ulogic;
|
|
write_enable : std_ulogic;
|
|
write_reg: gspr_index_t;
|
|
write_data: std_ulogic_vector(63 downto 0);
|
|
write_cr_enable : std_ulogic;
|
|
write_cr_mask : std_ulogic_vector(7 downto 0);
|
|
write_cr_data : std_ulogic_vector(31 downto 0);
|
|
write_xerc_enable : std_ulogic;
|
|
xerc : xer_common_t;
|
|
interrupt : std_ulogic;
|
|
intr_vec : intr_vector_t;
|
|
redirect: std_ulogic;
|
|
redir_mode: std_ulogic_vector(3 downto 0);
|
|
last_nia: std_ulogic_vector(63 downto 0);
|
|
br_offset: std_ulogic_vector(63 downto 0);
|
|
br_last: std_ulogic;
|
|
br_taken: std_ulogic;
|
|
abs_br: std_ulogic;
|
|
srr1: std_ulogic_vector(15 downto 0);
|
|
msr: std_ulogic_vector(63 downto 0);
|
|
end record;
|
|
constant Execute1ToWritebackInit : Execute1ToWritebackType :=
|
|
(valid => '0', instr_tag => instr_tag_init, rc => '0', mode_32bit => '0',
|
|
write_enable => '0', write_cr_enable => '0',
|
|
write_xerc_enable => '0', xerc => xerc_init,
|
|
write_data => (others => '0'), write_cr_mask => (others => '0'),
|
|
write_cr_data => (others => '0'), write_reg => (others => '0'),
|
|
interrupt => '0', intr_vec => 0, redirect => '0', redir_mode => "0000",
|
|
last_nia => (others => '0'), br_offset => (others => '0'),
|
|
br_last => '0', br_taken => '0', abs_br => '0',
|
|
srr1 => (others => '0'), msr => (others => '0'));
|
|
|
|
type Execute1ToFPUType is record
|
|
valid : std_ulogic;
|
|
op : insn_type_t;
|
|
nia : std_ulogic_vector(63 downto 0);
|
|
itag : instr_tag_t;
|
|
insn : std_ulogic_vector(31 downto 0);
|
|
single : std_ulogic;
|
|
is_signed : std_ulogic;
|
|
fe_mode : std_ulogic_vector(1 downto 0);
|
|
fra : std_ulogic_vector(63 downto 0);
|
|
frb : std_ulogic_vector(63 downto 0);
|
|
frc : std_ulogic_vector(63 downto 0);
|
|
frt : gspr_index_t;
|
|
rc : std_ulogic;
|
|
out_cr : std_ulogic;
|
|
stall : std_ulogic;
|
|
end record;
|
|
constant Execute1ToFPUInit : Execute1ToFPUType := (valid => '0', op => OP_ILLEGAL, nia => (others => '0'),
|
|
itag => instr_tag_init,
|
|
insn => (others => '0'), fe_mode => "00", rc => '0',
|
|
fra => (others => '0'), frb => (others => '0'),
|
|
frc => (others => '0'), frt => (others => '0'),
|
|
single => '0', is_signed => '0', out_cr => '0',
|
|
stall => '0');
|
|
|
|
type FPUToExecute1Type is record
|
|
busy : std_ulogic;
|
|
f2stall : std_ulogic;
|
|
exception : std_ulogic;
|
|
end record;
|
|
constant FPUToExecute1Init : FPUToExecute1Type := (others => '0');
|
|
|
|
type FPUToWritebackType is record
|
|
valid : std_ulogic;
|
|
interrupt : std_ulogic;
|
|
instr_tag : instr_tag_t;
|
|
write_enable : std_ulogic;
|
|
write_reg : gspr_index_t;
|
|
write_data : std_ulogic_vector(63 downto 0);
|
|
write_cr_enable : std_ulogic;
|
|
write_cr_mask : std_ulogic_vector(7 downto 0);
|
|
write_cr_data : std_ulogic_vector(31 downto 0);
|
|
intr_vec : intr_vector_t;
|
|
srr0 : std_ulogic_vector(63 downto 0);
|
|
srr1 : std_ulogic_vector(15 downto 0);
|
|
end record;
|
|
constant FPUToWritebackInit : FPUToWritebackType :=
|
|
(valid => '0', interrupt => '0', instr_tag => instr_tag_init,
|
|
write_enable => '0', write_reg => (others => '0'),
|
|
write_cr_enable => '0', write_cr_mask => (others => '0'),
|
|
write_cr_data => (others => '0'),
|
|
intr_vec => 0, srr1 => (others => '0'),
|
|
others => (others => '0'));
|
|
|
|
type DividerToExecute1Type is record
|
|
valid: std_ulogic;
|
|
write_reg_data: std_ulogic_vector(63 downto 0);
|
|
overflow : std_ulogic;
|
|
end record;
|
|
constant DividerToExecute1Init : DividerToExecute1Type := (valid => '0', overflow => '0',
|
|
others => (others => '0'));
|
|
|
|
type WritebackToFetch1Type is record
|
|
redirect: std_ulogic;
|
|
virt_mode: std_ulogic;
|
|
priv_mode: std_ulogic;
|
|
big_endian: std_ulogic;
|
|
mode_32bit: std_ulogic;
|
|
redirect_nia: std_ulogic_vector(63 downto 0);
|
|
br_nia : std_ulogic_vector(63 downto 0);
|
|
br_last : std_ulogic;
|
|
br_taken : std_ulogic;
|
|
end record;
|
|
constant WritebackToFetch1Init : WritebackToFetch1Type :=
|
|
(redirect => '0', virt_mode => '0', priv_mode => '0', big_endian => '0',
|
|
mode_32bit => '0', redirect_nia => (others => '0'),
|
|
br_last => '0', br_taken => '0', br_nia => (others => '0'));
|
|
|
|
type WritebackToRegisterFileType is record
|
|
write_reg : gspr_index_t;
|
|
write_data : std_ulogic_vector(63 downto 0);
|
|
write_enable : std_ulogic;
|
|
end record;
|
|
constant WritebackToRegisterFileInit : WritebackToRegisterFileType :=
|
|
(write_enable => '0', write_data => (others => '0'), others => (others => '0'));
|
|
|
|
type WritebackToCrFileType is record
|
|
write_cr_enable : std_ulogic;
|
|
write_cr_mask : std_ulogic_vector(7 downto 0);
|
|
write_cr_data : std_ulogic_vector(31 downto 0);
|
|
write_xerc_enable : std_ulogic;
|
|
write_xerc_data : xer_common_t;
|
|
end record;
|
|
constant WritebackToCrFileInit : WritebackToCrFileType := (write_cr_enable => '0', write_xerc_enable => '0',
|
|
write_xerc_data => xerc_init,
|
|
write_cr_mask => (others => '0'),
|
|
write_cr_data => (others => '0'));
|
|
|
|
type WritebackEventType is record
|
|
instr_complete : std_ulogic;
|
|
fp_complete : std_ulogic;
|
|
end record;
|
|
|
|
end common;
|
|
|
|
package body common is
|
|
function decode_spr_num(insn: std_ulogic_vector(31 downto 0)) return spr_num_t is
|
|
begin
|
|
return to_integer(unsigned(insn(15 downto 11) & insn(20 downto 16)));
|
|
end;
|
|
function fast_spr_num(spr: spr_num_t) return gspr_index_t is
|
|
variable n : integer range 0 to 31;
|
|
-- tmp variable introduced as workaround for VCS compilation
|
|
-- simulation was failing with subtype constraint mismatch error
|
|
-- see GitHub PR #173
|
|
variable tmp : std_ulogic_vector(4 downto 0);
|
|
begin
|
|
case spr is
|
|
when SPR_LR =>
|
|
n := 0; -- N.B. decode2 relies on this specific value
|
|
when SPR_CTR =>
|
|
n := 1; -- N.B. decode2 relies on this specific value
|
|
when SPR_SRR0 =>
|
|
n := 2;
|
|
when SPR_SRR1 =>
|
|
n := 3;
|
|
when SPR_HSRR0 =>
|
|
n := 4;
|
|
when SPR_HSRR1 =>
|
|
n := 5;
|
|
when SPR_SPRG0 =>
|
|
n := 6;
|
|
when SPR_SPRG1 =>
|
|
n := 7;
|
|
when SPR_SPRG2 =>
|
|
n := 8;
|
|
when SPR_SPRG3 | SPR_SPRG3U =>
|
|
n := 9;
|
|
when SPR_HSPRG0 =>
|
|
n := 10;
|
|
when SPR_HSPRG1 =>
|
|
n := 11;
|
|
when SPR_TAR =>
|
|
n := 13;
|
|
when others =>
|
|
n := 0;
|
|
return "0000000";
|
|
end case;
|
|
tmp := std_ulogic_vector(to_unsigned(n, 5));
|
|
return "01" & tmp;
|
|
end;
|
|
|
|
function gspr_to_gpr(i: gspr_index_t) return gpr_index_t is
|
|
begin
|
|
return i(4 downto 0);
|
|
end;
|
|
|
|
function gpr_to_gspr(i: gpr_index_t) return gspr_index_t is
|
|
begin
|
|
return "00" & i;
|
|
end;
|
|
|
|
function gpr_or_spr_to_gspr(g: gpr_index_t; s: gspr_index_t) return gspr_index_t is
|
|
begin
|
|
if s(5) = '1' then
|
|
return s;
|
|
else
|
|
return gpr_to_gspr(g);
|
|
end if;
|
|
end;
|
|
|
|
function is_fast_spr(s: gspr_index_t) return std_ulogic is
|
|
begin
|
|
return s(5);
|
|
end;
|
|
|
|
function fpr_to_gspr(f: fpr_index_t) return gspr_index_t is
|
|
begin
|
|
return "10" & f;
|
|
end;
|
|
|
|
function tag_match(tag1 : instr_tag_t; tag2 : instr_tag_t) return boolean is
|
|
begin
|
|
return tag1.valid = '1' and tag2.valid = '1' and tag1.tag = tag2.tag;
|
|
end;
|
|
|
|
function addr_to_real(addr: std_ulogic_vector(63 downto 0)) return real_addr_t is
|
|
begin
|
|
return addr(real_addr_t'range);
|
|
end;
|
|
end common;
|