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antonblanchard.microwatt/common.vhdl
Paul Mackerras 413907e4bc soc: Move timebase back into the core and enable writing to it 
Instead of a single global timebase register in the SoC, we now have
a timebase counter in each core; however, now they are only reset by
the soc reset, not the core reset.  Thus they stay in sync even when
some cores are disabled (via the syscon cpu_ctrl register).

This implements mtspr to the TBLW and TBUW SPRs, which write the lower
and upper 32 bits of this core's timebase, respectively.

In order to fulfil the ISA's requirements that (a) some method for
getting the timebases into sync and (b) some method for preventing
userspace from reading the timebase be provided by the platform, this
adds a syscon register TB_CTRL with two read/write bits implemented;
bit 0 freezes all the timebases in the system when set, and bit 1
makes reading the timebase privileged (in all cores).

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
2025-02-18 18:27:22 +11:00

974 lines
38 KiB
VHDL
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library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
library work;
use work.utils.all;
use work.decode_types.all;
package common is
-- Processor Version Number
constant PVR_MICROWATT : std_ulogic_vector(31 downto 0) := x"00630000";
-- MSR bit numbers
constant MSR_SF : integer := (63 - 0); -- Sixty-Four bit mode
constant MSR_HV : integer := (63 - 3); -- Hypervisor mode (always 1)
constant MSR_EE : integer := (63 - 48); -- External interrupt Enable
constant MSR_PR : integer := (63 - 49); -- PRoblem state
constant MSR_FP : integer := (63 - 50); -- Floating Point available
constant MSR_FE0 : integer := (63 - 52); -- Floating Exception mode
constant MSR_SE : integer := (63 - 53); -- Single-step bit of TE field
constant MSR_BE : integer := (63 - 54); -- Branch trace bit of TE field
constant MSR_FE1 : integer := (63 - 55); -- Floating Exception mode
constant MSR_IR : integer := (63 - 58); -- Instruction Relocation
constant MSR_DR : integer := (63 - 59); -- Data Relocation
constant MSR_PMM : integer := (63 - 61); -- Performance Monitor Mark
constant MSR_RI : integer := (63 - 62); -- Recoverable Interrupt
constant MSR_LE : integer := (63 - 63); -- Little Endian
-- SPR numbers
subtype spr_num_t is integer range 0 to 1023;
function decode_spr_num(insn: std_ulogic_vector(31 downto 0)) return spr_num_t;
constant SPR_XER : spr_num_t := 1;
constant SPR_LR : spr_num_t := 8;
constant SPR_CTR : spr_num_t := 9;
constant SPR_TAR : spr_num_t := 815;
constant SPR_DSISR : spr_num_t := 18;
constant SPR_DAR : spr_num_t := 19;
constant SPR_TB : spr_num_t := 268;
constant SPR_TBU : spr_num_t := 269;
constant SPR_TBLW : spr_num_t := 284;
constant SPR_TBUW : spr_num_t := 285;
constant SPR_DEC : spr_num_t := 22;
constant SPR_SRR0 : spr_num_t := 26;
constant SPR_SRR1 : spr_num_t := 27;
constant SPR_CFAR : spr_num_t := 28;
constant SPR_HSRR0 : spr_num_t := 314;
constant SPR_HSRR1 : spr_num_t := 315;
constant SPR_SPRG0 : spr_num_t := 272;
constant SPR_SPRG1 : spr_num_t := 273;
constant SPR_SPRG2 : spr_num_t := 274;
constant SPR_SPRG3 : spr_num_t := 275;
constant SPR_SPRG3U : spr_num_t := 259;
constant SPR_HSPRG0 : spr_num_t := 304;
constant SPR_HSPRG1 : spr_num_t := 305;
constant SPR_PID : spr_num_t := 48;
constant SPR_PTCR : spr_num_t := 464;
constant SPR_PVR : spr_num_t := 287;
constant SPR_FSCR : spr_num_t := 153;
constant SPR_HFSCR : spr_num_t := 190;
constant SPR_HEIR : spr_num_t := 339;
constant SPR_CTRL : spr_num_t := 136;
constant SPR_CTRLW : spr_num_t := 152;
constant SPR_UDSCR : spr_num_t := 3;
constant SPR_DSCR : spr_num_t := 17;
constant SPR_VRSAVE : spr_num_t := 256;
constant SPR_PIR : spr_num_t := 1023;
constant SPR_CIABR : spr_num_t := 187;
constant SPR_DAWR0 : spr_num_t := 180;
constant SPR_DAWR1 : spr_num_t := 181;
constant SPR_DAWRX0 : spr_num_t := 188;
constant SPR_DAWRX1 : spr_num_t := 189;
constant SPR_HASHKEYR : spr_num_t := 468;
constant SPR_HASHPKEYR : spr_num_t := 469;
constant SPR_DEXCR : spr_num_t := 828;
constant SPR_DEXCRU : spr_num_t := 812;
constant SPR_HDEXCR : spr_num_t := 471;
constant SPR_HDEXCU : spr_num_t := 455;
constant SPR_NOOP0 : spr_num_t := 808;
constant SPR_NOOP1 : spr_num_t := 809;
constant SPR_NOOP2 : spr_num_t := 810;
constant SPR_NOOP3 : spr_num_t := 811;
-- PMU registers
constant SPR_UPMC1 : spr_num_t := 771;
constant SPR_UPMC2 : spr_num_t := 772;
constant SPR_UPMC3 : spr_num_t := 773;
constant SPR_UPMC4 : spr_num_t := 774;
constant SPR_UPMC5 : spr_num_t := 775;
constant SPR_UPMC6 : spr_num_t := 776;
constant SPR_UMMCR0 : spr_num_t := 779;
constant SPR_UMMCR1 : spr_num_t := 782;
constant SPR_UMMCR2 : spr_num_t := 769;
constant SPR_UMMCRA : spr_num_t := 770;
constant SPR_USIER : spr_num_t := 768;
constant SPR_USIAR : spr_num_t := 780;
constant SPR_USDAR : spr_num_t := 781;
constant SPR_PMC1 : spr_num_t := 787;
constant SPR_PMC2 : spr_num_t := 788;
constant SPR_PMC3 : spr_num_t := 789;
constant SPR_PMC4 : spr_num_t := 790;
constant SPR_PMC5 : spr_num_t := 791;
constant SPR_PMC6 : spr_num_t := 792;
constant SPR_MMCR0 : spr_num_t := 795;
constant SPR_MMCR1 : spr_num_t := 798;
constant SPR_MMCR2 : spr_num_t := 785;
constant SPR_MMCRA : spr_num_t := 786;
constant SPR_SIER : spr_num_t := 784;
constant SPR_SIAR : spr_num_t := 796;
constant SPR_SDAR : spr_num_t := 797;
-- GPR indices in the register file (GPR only)
subtype gpr_index_t is std_ulogic_vector(4 downto 0);
-- Extended GPR index (can hold a GPR or a FPR)
subtype gspr_index_t is std_ulogic_vector(5 downto 0);
-- FPR indices
subtype fpr_index_t is std_ulogic_vector(4 downto 0);
-- FPRs are stored in the register file, using GSPR
-- numbers from 32 to 63.
--
-- Indices conversion functions
function gspr_to_gpr(i: gspr_index_t) return gpr_index_t;
function gpr_to_gspr(i: gpr_index_t) return gspr_index_t;
function fpr_to_gspr(f: fpr_index_t) return gspr_index_t;
-- The XER is split: the common bits (CA, OV, SO, OV32 and CA32) are
-- in the CR file as a kind of CR extension (with a separate write
-- control). The rest is stored in ctrl_t (effectively in execute1).
type xer_common_t is record
ca : std_ulogic;
ca32 : std_ulogic;
ov : std_ulogic;
ov32 : std_ulogic;
so : std_ulogic;
end record;
constant xerc_init : xer_common_t := (others => '0');
-- Some SPRs are stored in a pair of small RAMs in execute1
-- Even half:
subtype ramspr_index_range is natural range 0 to 7;
subtype ramspr_index is unsigned(2 downto 0);
constant RAMSPR_SRR0 : ramspr_index := to_unsigned(0,3);
constant RAMSPR_HSRR0 : ramspr_index := to_unsigned(1,3);
constant RAMSPR_SPRG0 : ramspr_index := to_unsigned(2,3);
constant RAMSPR_SPRG2 : ramspr_index := to_unsigned(3,3);
constant RAMSPR_HSPRG0 : ramspr_index := to_unsigned(4,3);
constant RAMSPR_LR : ramspr_index := to_unsigned(5,3); -- must equal RAMSPR_CTR
constant RAMSPR_TAR : ramspr_index := to_unsigned(6,3);
constant RAMSPR_VRSAVE : ramspr_index := to_unsigned(7,3);
-- Odd half:
constant RAMSPR_SRR1 : ramspr_index := to_unsigned(0,3);
constant RAMSPR_HSRR1 : ramspr_index := to_unsigned(1,3);
constant RAMSPR_SPRG1 : ramspr_index := to_unsigned(2,3);
constant RAMSPR_SPRG3 : ramspr_index := to_unsigned(3,3);
constant RAMSPR_HSPRG1 : ramspr_index := to_unsigned(4,3);
constant RAMSPR_CTR : ramspr_index := to_unsigned(5,3); -- must equal RAMSPR_LR
constant RAMSPR_HASHKY : ramspr_index := to_unsigned(6,3);
constant RAMSPR_HASHPK : ramspr_index := to_unsigned(7,3);
type ram_spr_info is record
index : ramspr_index;
isodd : std_ulogic;
is32b : std_ulogic;
valid : std_ulogic;
end record;
constant ram_spr_info_init: ram_spr_info := (index => to_unsigned(0,3), others => '0');
subtype spr_selector is std_ulogic_vector(3 downto 0);
type spr_id is record
sel : spr_selector;
valid : std_ulogic;
ispmu : std_ulogic;
ronly : std_ulogic;
wonly : std_ulogic;
noop : std_ulogic;
end record;
constant spr_id_init : spr_id := (sel => "0000", others => '0');
constant SPRSEL_TB : spr_selector := 4x"0";
constant SPRSEL_TBU : spr_selector := 4x"1";
constant SPRSEL_DEC : spr_selector := 4x"2";
constant SPRSEL_PVR : spr_selector := 4x"3";
constant SPRSEL_LOGA : spr_selector := 4x"4";
constant SPRSEL_LOGD : spr_selector := 4x"5";
constant SPRSEL_CFAR : spr_selector := 4x"6";
constant SPRSEL_FSCR : spr_selector := 4x"7";
constant SPRSEL_HFSCR : spr_selector := 4x"8";
constant SPRSEL_HEIR : spr_selector := 4x"9";
constant SPRSEL_CTRL : spr_selector := 4x"a";
constant SPRSEL_DSCR : spr_selector := 4x"b";
constant SPRSEL_PIR : spr_selector := 4x"c";
constant SPRSEL_CIABR : spr_selector := 4x"d";
constant SPRSEL_DEXCR : spr_selector := 4x"e";
constant SPRSEL_XER : spr_selector := 4x"f";
-- FSCR and HFSCR bit numbers
constant FSCR_PREFIX : integer := 63 - 50;
constant FSCR_SCV : integer := 63 - 51;
constant FSCR_TAR : integer := 63 - 55;
constant FSCR_DSCR : integer := 63 - 61;
constant HFSCR_PREFIX : integer := 63 - 50;
constant HFSCR_MSG : integer := 63 - 53;
constant HFSCR_TAR : integer := 63 - 55;
constant HFSCR_PMUSPR : integer := 63 - 60;
constant HFSCR_DSCR : integer := 63 - 61;
constant HFSCR_FP : integer := 63 - 63;
-- FPSCR bit numbers
constant FPSCR_FX : integer := 63 - 32;
constant FPSCR_FEX : integer := 63 - 33;
constant FPSCR_VX : integer := 63 - 34;
constant FPSCR_OX : integer := 63 - 35;
constant FPSCR_UX : integer := 63 - 36;
constant FPSCR_ZX : integer := 63 - 37;
constant FPSCR_XX : integer := 63 - 38;
constant FPSCR_VXSNAN : integer := 63 - 39;
constant FPSCR_VXISI : integer := 63 - 40;
constant FPSCR_VXIDI : integer := 63 - 41;
constant FPSCR_VXZDZ : integer := 63 - 42;
constant FPSCR_VXIMZ : integer := 63 - 43;
constant FPSCR_VXVC : integer := 63 - 44;
constant FPSCR_FR : integer := 63 - 45;
constant FPSCR_FI : integer := 63 - 46;
constant FPSCR_C : integer := 63 - 47;
constant FPSCR_FL : integer := 63 - 48;
constant FPSCR_FG : integer := 63 - 49;
constant FPSCR_FE : integer := 63 - 50;
constant FPSCR_FU : integer := 63 - 51;
constant FPSCR_VXSOFT : integer := 63 - 53;
constant FPSCR_VXSQRT : integer := 63 - 54;
constant FPSCR_VXCVI : integer := 63 - 55;
constant FPSCR_VE : integer := 63 - 56;
constant FPSCR_OE : integer := 63 - 57;
constant FPSCR_UE : integer := 63 - 58;
constant FPSCR_ZE : integer := 63 - 59;
constant FPSCR_XE : integer := 63 - 60;
constant FPSCR_NI : integer := 63 - 61;
constant FPSCR_RN : integer := 63 - 63;
-- Real addresses
-- REAL_ADDR_BITS is the number of real address bits that we store
constant REAL_ADDR_BITS : positive := 56;
subtype real_addr_t is std_ulogic_vector(REAL_ADDR_BITS - 1 downto 0);
function addr_to_real(addr: std_ulogic_vector(63 downto 0)) return real_addr_t;
-- Minimum page size
constant MIN_LG_PGSZ : positive := 12;
constant MIN_PAGESZ : positive := 2 ** MIN_LG_PGSZ;
-- Used for tracking instruction completion and pending register writes
constant TAG_COUNT : positive := 4;
constant TAG_NUMBER_BITS : natural := log2(TAG_COUNT);
subtype tag_number_t is integer range 0 to TAG_COUNT - 1;
subtype tag_index_t is unsigned(TAG_NUMBER_BITS - 1 downto 0);
type instr_tag_t is record
tag : tag_number_t;
valid : std_ulogic;
end record;
constant instr_tag_init : instr_tag_t := (tag => 0, valid => '0');
function tag_match(tag1 : instr_tag_t; tag2 : instr_tag_t) return boolean;
subtype intr_vector_t is integer range 0 to 16#fff#;
-- For now, fixed 16 sources, make this either a parametric
-- package of some sort or an unconstrainted array.
-- We don't know NCPUS or SRC_NUM here, so make this
-- large enough for 4 cpus and 16 interrupt sources for now.
type ics_to_icp_t is record
-- Level interrupts only, ICS just keeps prsenting the
-- highest priority interrupt. Once handling edge, something
-- smarter involving handshake & reject support will be needed
src : std_ulogic_vector(15 downto 0); -- 4 bits each for 4 cpus
pri : std_ulogic_vector(31 downto 0); -- 8 bits each for 4 cpus
end record;
-- Bits in each half of DEXCR and HDEXCR
subtype aspect_bits_t is std_ulogic_vector(4 downto 0);
constant aspect_bits_init : aspect_bits_t := (others => '1');
-- Bit numbers in aspect_bits_t
constant DEXCR_SBHE : integer := 4; -- speculative branch hint enable
constant DEXCR_IBRTPD : integer := 3; -- indirect branch recurrent target prediction disable
constant DEXCR_SRAPD : integer := 2; -- subroutine return address prediction disable
constant DEXCR_NPHIE : integer := 1; -- non-privileged hash instruction enable
constant DEXCR_PHIE : integer := 0; -- privileged hash instruction enable
-- This needs to die...
type ctrl_t is record
wait_state: std_ulogic;
run: std_ulogic;
dec: std_ulogic_vector(63 downto 0);
msr: std_ulogic_vector(63 downto 0);
cfar: std_ulogic_vector(63 downto 0);
xer_low: std_ulogic_vector(17 downto 0);
fscr_ic: std_ulogic_vector(3 downto 0);
fscr_pref: std_ulogic;
fscr_scv: std_ulogic;
fscr_tar: std_ulogic;
fscr_dscr: std_ulogic;
hfscr_ic: std_ulogic_vector(3 downto 0);
hfscr_pref: std_ulogic;
hfscr_tar: std_ulogic;
hfscr_dscr: std_ulogic;
hfscr_fp: std_ulogic;
heir: std_ulogic_vector(63 downto 0);
dscr: std_ulogic_vector(24 downto 0);
ciabr: std_ulogic_vector(63 downto 0);
dexcr_pnh: aspect_bits_t;
dexcr_pro: aspect_bits_t;
hdexcr_hyp: aspect_bits_t;
hdexcr_enf: aspect_bits_t;
end record;
constant ctrl_t_init : ctrl_t :=
(wait_state => '0', run => '1', xer_low => 18x"0",
fscr_ic => x"0", fscr_pref => '1', fscr_scv => '1', fscr_tar => '1', fscr_dscr => '1',
hfscr_ic => x"0", hfscr_pref => '1', hfscr_tar => '1', hfscr_dscr => '1', hfscr_fp => '1',
dscr => (others => '0'),
dexcr_pnh => aspect_bits_init, dexcr_pro => aspect_bits_init,
hdexcr_hyp => aspect_bits_init, hdexcr_enf => aspect_bits_init,
others => (others => '0'));
type timebase_ctrl is record
reset : std_ulogic;
rd_prot : std_ulogic; -- read-protect => userspace can't read TB
freeze : std_ulogic;
end record;
type Fetch1ToIcacheType is record
req: std_ulogic;
fetch_fail : std_ulogic;
virt_mode : std_ulogic;
priv_mode : std_ulogic;
big_endian : std_ulogic;
stop_mark: std_ulogic;
predicted : std_ulogic;
pred_ntaken : std_ulogic;
nia: std_ulogic_vector(63 downto 0);
next_nia: std_ulogic_vector(63 downto 0);
rpn: std_ulogic_vector(REAL_ADDR_BITS - MIN_LG_PGSZ - 1 downto 0);
next_rpn: std_ulogic_vector(REAL_ADDR_BITS - MIN_LG_PGSZ - 1 downto 0);
end record;
type IcacheToDecode1Type is record
valid: std_ulogic;
stop_mark: std_ulogic;
fetch_failed: std_ulogic;
nia: std_ulogic_vector(63 downto 0);
insn: std_ulogic_vector(31 downto 0);
icode: insn_code;
big_endian: std_ulogic;
next_predicted: std_ulogic;
next_pred_ntaken: std_ulogic;
end record;
constant IcacheToDecode1Init : IcacheToDecode1Type :=
(nia => (others => '0'), insn => (others => '0'), icode => INSN_illegal, others => '0');
type IcacheEventType is record
icache_miss : std_ulogic;
itlb_miss_resolved : std_ulogic;
end record;
type Decode1ToDecode2Type is record
valid: std_ulogic;
stop_mark : std_ulogic;
second : std_ulogic;
nia: std_ulogic_vector(63 downto 0);
prefixed: std_ulogic;
prefix: std_ulogic_vector(25 downto 0);
illegal_suffix: std_ulogic;
misaligned_prefix: std_ulogic;
insn: std_ulogic_vector(31 downto 0);
decode: decode_rom_t;
br_pred: std_ulogic; -- Branch was predicted to be taken
big_endian: std_ulogic;
spr_info : spr_id;
ram_spr : ram_spr_info;
reg_a : gspr_index_t;
reg_b : gspr_index_t;
reg_c : gspr_index_t;
end record;
constant Decode1ToDecode2Init : Decode1ToDecode2Type :=
(valid => '0', stop_mark => '0', second => '0', nia => (others => '0'),
prefixed => '0', prefix => (others => '0'), insn => (others => '0'),
illegal_suffix => '0', misaligned_prefix => '0',
decode => decode_rom_init, br_pred => '0', big_endian => '0',
spr_info => spr_id_init, ram_spr => ram_spr_info_init,
reg_a => (others => '0'), reg_b => (others => '0'), reg_c => (others => '0'));
type Decode1ToFetch1Type is record
redirect : std_ulogic;
redirect_nia : std_ulogic_vector(63 downto 0);
end record;
type Decode1ToRegisterFileType is record
reg_1_addr : gspr_index_t;
reg_2_addr : gspr_index_t;
reg_3_addr : gspr_index_t;
read_1_enable : std_ulogic;
read_2_enable : std_ulogic;
read_3_enable : std_ulogic;
end record;
type bypass_data_t is record
tag : instr_tag_t;
data : std_ulogic_vector(63 downto 0);
end record;
constant bypass_data_init : bypass_data_t := (tag => instr_tag_init, data => (others => '0'));
type cr_bypass_data_t is record
tag : instr_tag_t;
data : std_ulogic_vector(31 downto 0);
end record;
constant cr_bypass_data_init : cr_bypass_data_t := (tag => instr_tag_init, data => (others => '0'));
type Decode2ToExecute1Type is record
valid: std_ulogic;
unit : unit_t;
fac : facility_t;
insn_type: insn_type_t;
nia: std_ulogic_vector(63 downto 0);
instr_tag : instr_tag_t;
write_reg: gspr_index_t;
write_reg_enable: std_ulogic;
read_reg1: gspr_index_t;
read_reg2: gspr_index_t;
read_reg3: gspr_index_t;
read_data1: std_ulogic_vector(63 downto 0);
read_data2: std_ulogic_vector(63 downto 0);
read_data3: std_ulogic_vector(63 downto 0);
reg_valid1: std_ulogic;
reg_valid2: std_ulogic;
reg_valid3: std_ulogic;
cr: std_ulogic_vector(31 downto 0);
xerc: xer_common_t;
lr: std_ulogic;
br_abs: std_ulogic;
rc: std_ulogic;
oe: std_ulogic;
invert_a: std_ulogic;
invert_out: std_ulogic;
input_carry: carry_in_t;
output_carry: std_ulogic;
input_cr: std_ulogic;
output_cr: std_ulogic;
output_xer: std_ulogic;
is_32bit: std_ulogic;
is_signed: std_ulogic;
insn: std_ulogic_vector(31 downto 0);
data_len: std_ulogic_vector(3 downto 0);
byte_reverse : std_ulogic;
sign_extend : std_ulogic; -- do we need to sign extend?
update : std_ulogic; -- is this an update instruction?
reserve : std_ulogic; -- set for larx/stcx
br_pred : std_ulogic;
result_sel : std_ulogic_vector(2 downto 0); -- select source of result
sub_select : std_ulogic_vector(2 downto 0); -- sub-result selection
repeat : std_ulogic; -- set if instruction is cracked into two ops
second : std_ulogic; -- set if this is the second op
spr_select : spr_id;
spr_is_ram : std_ulogic;
ramspr_even_rdaddr : ramspr_index;
ramspr_odd_rdaddr : ramspr_index;
ramspr_rd_odd : std_ulogic;
ramspr_wraddr : ramspr_index;
ramspr_write_even : std_ulogic;
ramspr_write_odd : std_ulogic;
ramspr_32bit : std_ulogic;
dbg_spr_access : std_ulogic;
dec_ctr : std_ulogic;
privileged : std_ulogic;
prefixed : std_ulogic;
prefix : std_ulogic_vector(25 downto 0);
illegal_suffix : std_ulogic;
misaligned_prefix : std_ulogic;
illegal_form : std_ulogic;
uses_tar : std_ulogic;
uses_dscr : std_ulogic;
right_shift : std_ulogic;
rot_clear_left : std_ulogic;
rot_clear_right : std_ulogic;
rot_sign_ext : std_ulogic;
do_popcnt : std_ulogic;
end record;
constant Decode2ToExecute1Init : Decode2ToExecute1Type :=
(valid => '0', unit => ALU, fac => NONE, insn_type => OP_ILLEGAL, instr_tag => instr_tag_init,
write_reg_enable => '0',
lr => '0', br_abs => '0', rc => '0', oe => '0', invert_a => '0',
invert_out => '0', input_carry => ZERO, output_carry => '0', input_cr => '0',
output_cr => '0', output_xer => '0',
is_32bit => '0', is_signed => '0', xerc => xerc_init, reserve => '0', br_pred => '0',
byte_reverse => '0', sign_extend => '0', update => '0', nia => (others => '0'),
read_data1 => (others => '0'), read_data2 => (others => '0'), read_data3 => (others => '0'),
reg_valid1 => '0', reg_valid2 => '0', reg_valid3 => '0',
cr => (others => '0'), insn => (others => '0'), data_len => (others => '0'),
result_sel => "000", sub_select => "000",
repeat => '0', second => '0', spr_select => spr_id_init,
spr_is_ram => '0',
ramspr_even_rdaddr => (others => '0'), ramspr_odd_rdaddr => (others => '0'), ramspr_rd_odd => '0',
ramspr_wraddr => (others => '0'), ramspr_write_even => '0', ramspr_write_odd => '0',
ramspr_32bit => '0',
dbg_spr_access => '0',
dec_ctr => '0',
privileged => '0', prefixed => '0', prefix => (others => '0'), illegal_suffix => '0',
misaligned_prefix => '0', illegal_form => '0', uses_tar => '0', uses_dscr => '0',
right_shift => '0', rot_clear_left => '0', rot_clear_right => '0', rot_sign_ext => '0',
do_popcnt => '0',
others => (others => '0'));
type MultiplyInputType is record
valid: std_ulogic;
data1: std_ulogic_vector(63 downto 0);
data2: std_ulogic_vector(63 downto 0);
addend: std_ulogic_vector(127 downto 0);
is_signed: std_ulogic;
subtract: std_ulogic; -- 0 => addend + data1 * data2, 1 => addend - data1 * data2
end record;
constant MultiplyInputInit : MultiplyInputType := (data1 => 64x"0", data2 => 64x"0",
addend => 128x"0", others => '0');
type MultiplyOutputType is record
valid: std_ulogic;
result: std_ulogic_vector(127 downto 0);
overflow : std_ulogic;
end record;
constant MultiplyOutputInit : MultiplyOutputType := (valid => '0', overflow => '0',
others => (others => '0'));
type Execute1ToDividerType is record
valid: std_ulogic;
flush: std_ulogic;
dividend: std_ulogic_vector(63 downto 0);
divisor: std_ulogic_vector(63 downto 0);
is_signed: std_ulogic;
is_32bit: std_ulogic;
is_extended: std_ulogic;
is_modulus: std_ulogic;
neg_result: std_ulogic;
end record;
constant Execute1ToDividerInit: Execute1ToDividerType := (
dividend => 64x"0", divisor => 64x"0", others => '0');
type PMUEventType is record
no_instr_avail : std_ulogic;
dispatch : std_ulogic;
ext_interrupt : std_ulogic;
instr_complete : std_ulogic;
fp_complete : std_ulogic;
ld_complete : std_ulogic;
st_complete : std_ulogic;
br_taken_complete : std_ulogic;
br_mispredict : std_ulogic;
ipref_discard : std_ulogic;
itlb_miss : std_ulogic;
itlb_miss_resolved : std_ulogic;
icache_miss : std_ulogic;
dc_miss_resolved : std_ulogic;
dc_load_miss : std_ulogic;
dc_ld_miss_resolved : std_ulogic;
dc_store_miss : std_ulogic;
dtlb_miss : std_ulogic;
dtlb_miss_resolved : std_ulogic;
ld_miss_nocache : std_ulogic;
ld_fill_nocache : std_ulogic;
end record;
constant PMUEventInit : PMUEventType := (others => '0');
type Execute1ToPMUType is record
mfspr : std_ulogic;
mtspr : std_ulogic;
spr_num : std_ulogic_vector(4 downto 0);
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;
trace : 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;
read2_enable : std_ulogic;
read3_enable : std_ulogic;
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
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?
hash : std_ulogic;
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;
prefixed : std_ulogic;
repeat : std_ulogic;
second : std_ulogic;
e2stall : std_ulogic;
msr : std_ulogic_vector(63 downto 0);
hashkey : std_ulogic_vector(63 downto 0);
hash_enable : std_ulogic;
end record;
constant Execute1ToLoadstore1Init : Execute1ToLoadstore1Type :=
(valid => '0', op => OP_ILLEGAL, ci => '0', byte_reverse => '0',
sign_extend => '0', update => '0', hash => '0', xerc => xerc_init,
reserve => '0', rc => '0', virt_mode => '0', priv_mode => '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', prefixed => '0',
repeat => '0', second => '0', e2stall => '0',
msr => (others => '0'), hashkey => (others => '0'), hash_enable => '0');
type Loadstore1ToExecute1Type is record
busy : std_ulogic;
l2stall : std_ulogic;
ea_for_pmu : std_ulogic_vector(63 downto 0);
ea_valid : std_ulogic;
end record;
type Loadstore1ToDcacheType is record
valid : std_ulogic;
hold : std_ulogic;
load : std_ulogic; -- is this a load
dcbz : std_ulogic;
flush : std_ulogic;
touch : std_ulogic;
sync : std_ulogic;
nc : std_ulogic;
reserve : std_ulogic;
atomic_qw : std_ulogic; -- part of a quadword atomic op
atomic_first : std_ulogic;
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);
dawr_match : std_ulogic; -- valid the cycle after .valid = 1
end record;
constant Loadstore1ToDcacheInit : Loadstore1ToDcacheType :=
(addr => (others => '0'), data => (others => '0'), byte_sel => x"00",
others => '0');
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;
reserve_nc : 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;
ric : std_ulogic_vector(1 downto 0);
sprnf : std_ulogic;
sprnt : std_ulogic;
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 MmuToITLBType 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;
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,
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;
hv_intr : std_ulogic;
is_scv : 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_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', hv_intr => '0', is_scv => '0', intr_vec => 0,
redirect => '0', redir_mode => "0000",
last_nia => (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);
valid_a : std_ulogic;
valid_b : std_ulogic;
valid_c : std_ulogic;
frt : gspr_index_t;
rc : std_ulogic;
m32b : std_ulogic;
out_cr : std_ulogic;
oe : std_ulogic;
xerc : xer_common_t;
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'),
valid_a => '0', valid_b => '0', valid_c => '0',
single => '0', is_signed => '0', out_cr => '0',
m32b => '0', oe => '0', xerc => xerc_init,
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);
write_xerc : std_ulogic;
xerc : xer_common_t;
intr_vec : intr_vector_t;
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'),
write_xerc => '0', xerc => xerc_init,
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;
interrupt : std_ulogic;
intr_vec : std_ulogic_vector(16 downto 0);
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'),
interrupt => '0', intr_vec => 17x"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 WritebackToExecute1Type is record
intr : std_ulogic;
hv_intr : std_ulogic;
scv_int : std_ulogic;
srr1 : std_ulogic_vector(15 downto 0);
end record;
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 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 "0" & i;
end;
function fpr_to_gspr(f: fpr_index_t) return gspr_index_t is
begin
return "1" & 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;
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