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144 lines
5.5 KiB
VHDL
144 lines
5.5 KiB
VHDL
-- © IBM Corp. 2020
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-- Licensed under the Apache License, Version 2.0 (the "License"), as modified by
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-- the terms below; you may not use the files in this repository except in
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-- compliance with the License as modified.
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-- You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
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--
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-- Modified Terms:
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--
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-- 1) For the purpose of the patent license granted to you in Section 3 of the
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-- License, the "Work" hereby includes implementations of the work of authorship
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-- in physical form.
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--
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-- 2) Notwithstanding any terms to the contrary in the License, any licenses
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-- necessary for implementation of the Work that are available from OpenPOWER
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-- via the Power ISA End User License Agreement (EULA) are explicitly excluded
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-- hereunder, and may be obtained from OpenPOWER under the terms and conditions
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-- of the EULA.
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--
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-- Unless required by applicable law or agreed to in writing, the reference design
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-- distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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-- WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License
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-- for the specific language governing permissions and limitations under the License.
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--
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-- Additional rights, including the ability to physically implement a softcore that
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-- is compliant with the required sections of the Power ISA Specification, are
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-- available at no cost under the terms of the OpenPOWER Power ISA EULA, which can be
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-- obtained (along with the Power ISA) here: https://openpowerfoundation.org.
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-- *!****************************************************************
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-- *! FILENAME : tri_err_rpt.vhdl
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-- *! DESCRIPTION : Error Reporting Component
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-- *!
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-- *!****************************************************************
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library ieee; use ieee.std_logic_1164.all;
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use ieee.numeric_std.all;
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library support;
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use support.power_logic_pkg.all;
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library tri; use tri.tri_latches_pkg.all;
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-- pragma translate_off
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-- pragma translate_on
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entity tri_err_rpt is
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generic (
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width : positive := 1; -- number of errors of the same type
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mask_reset_value : std_ulogic_vector := "0";-- use to set default/flush value for mask bits
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inline : boolean := false; -- make hold latch be inline; err_out is sticky -- default to shadow
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share_mask : boolean := false; -- PERMISSION NEEDED for true
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-- used for width >1 to reduce area of mask (common error disable)
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use_nlats : boolean := false; -- only necessary in standby area to be able to reset to init value
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needs_sreset : integer := 1 ; -- for inferred latches
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expand_type : integer := 1 ); -- 1 = non-ibm, 2 = ibm (MPG)
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port (
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vd : inout power_logic;
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gd : inout power_logic;
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err_d1clk : in std_ulogic; -- caution: if lcb uses powersavings, errors must always get reported
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err_d2clk : in std_ulogic;
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err_lclk : in clk_logic;
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-- error scan chain (func or mode)
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err_scan_in : in std_ulogic_vector(0 to width-1);
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err_scan_out : out std_ulogic_vector(0 to width-1);
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-- clock gateable mode clocks
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mode_dclk : in std_ulogic;
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mode_lclk : in clk_logic;
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-- mode scan chain
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mode_scan_in : in std_ulogic_vector(0 to width-1);
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mode_scan_out : out std_ulogic_vector(0 to width-1);
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err_in : in std_ulogic_vector(0 to width-1);
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err_out : out std_ulogic_vector(0 to width-1);
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hold_out : out std_ulogic_vector(0 to width-1); -- sticky error hold latch for trap usage
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mask_out : out std_ulogic_vector(0 to width-1)
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);
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-- synopsys translate_off
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-- synopsys translate_on
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end tri_err_rpt;
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architecture tri_err_rpt of tri_err_rpt is
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begin -- tri_err_rpt
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a: if expand_type /= 2 generate
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constant mask_initv : std_ulogic_vector(0 to (mask_reset_value'length + width-1)):=mask_reset_value & (0 to width-1=>'0');
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signal hold_in : std_ulogic_vector(0 to width-1);
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signal hold_lt : std_ulogic_vector(0 to width-1);
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signal mask_lt : std_ulogic_vector(0 to width-1);
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signal unused : std_ulogic_vector(0 to width);
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-- synopsys translate_off
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-- synopsys translate_on
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begin
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-- hold latches
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hold_in <= err_in or hold_lt;
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hold: entity tri.tri_nlat_scan
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generic map( width => width,
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needs_sreset => needs_sreset,
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expand_type => expand_type )
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port map
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( vd => vd,
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gd => gd,
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d1clk => err_d1clk,
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d2clk => err_d2clk,
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lclk => err_lclk,
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scan_in => err_scan_in(0 to width-1),
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scan_out => err_scan_out(0 to width-1),
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din => hold_in,
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q => hold_lt,
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q_b => open
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);
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-- mask
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m: if (share_mask = false) generate
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mask_lt <= mask_initv(0 to width-1);
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end generate m;
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sm: if (share_mask = true) generate
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mask_lt <= (others => mask_initv(0));
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end generate sm;
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mode_scan_out <= (others => '0');
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-- assign outputs
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hold_out <= hold_lt;
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mask_out <= mask_lt;
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inline_hold: if (inline = true) generate
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err_out <= hold_lt and not mask_lt;
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end generate inline_hold;
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side_hold: if (inline = false) generate
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err_out <= err_in and not mask_lt;
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end generate side_hold;
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unused(0) <= mode_dclk;
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unused(1 to width) <= mode_scan_in;
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end generate a;
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end tri_err_rpt;
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