[OpenSPARC-T2-DV] / design / sys / iop / niu / rtl / niu_ipp_sum_unit.v

// ========== Copyright Header Begin ==========================================
// 
// OpenSPARC T2 Processor File: niu_ipp_sum_unit.v
// Copyright (C) 1995-2007 Sun Microsystems, Inc. All Rights Reserved
// 4150 Network Circle, Santa Clara, California 95054, U.S.A.
//
// * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; version 2 of the License.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
// 
// For the avoidance of doubt, and except that if any non-GPL license 
// choice is available it will apply instead, Sun elects to use only 
// the General Public License version 2 (GPLv2) at this time for any 
// software where a choice of GPL license versions is made 
// available with the language indicating that GPLv2 or any later version 
// may be used, or where a choice of which version of the GPL is applied is 
// otherwise unspecified. 
//
// Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 
// CA 95054 USA or visit www.sun.com if you need additional information or 
// have any questions. 
// 
// ========== Copyright Header End ============================================

`timescale 1ns/10ps

/**********************************************************
***********************************************************

    Project         : Niu

    File name       : niu_ipp_sum_unit.v

    Module(s) name  : niu_ipp_sum_unit
    Original:       : sum_unit.v main.5, label:               

    Parent modules  : niu_ipp_sum.v

    Child modules   : niu_ipp_sum_lib.v, niu_ipp_sum.h,
		      niu_ipp_sum_data.v, niu_ipp_sum_ctrl.v.

    Author's name   : George Chu

    Date            : March. 2004

    Description     : One unit of the ipp checksum.

    Synthesis Notes:

    Modification History:

    Date       Description
    ----       -----------

************************************************************
***********************************************************/

module niu_ipp_sum_unit (ipp_din_dat, port_num,  ipp_full_cksum,
                 ipp_la4_prot,    ipp_la3_vers,  ipp_la2_opti, ip4_hdr_leng,
                 ipp_info_valid,  ipp_start_tcp, ipp_pkt_end,  ipp_max_bytes,
                 reset,           clk,
                 sum_prt_started, sum_prt_valid, 
                 sum_prt_fail,    sum_prt_cksum, sum_prt_length,
                 sum_prt_state);

input  [127:0] ipp_din_dat;         // pkt data 
input          port_num;            // if 1, this sum_unit is enabled
input          ipp_full_cksum;      // if 1, do the full check_sum
input    [1:0] ipp_la4_prot;        // layer_4, protocol, 0:not_interested,1:Tcp,2:Udp,3:SCTP
input    [1:0] ipp_la3_vers;        // layer_3, version,  0:not_interested,1:Ip4,2:Ip6,3:reser
input    [1:0] ipp_la2_opti;        // layer_2, options {LLC,VLAN}
input    [3:0] ip4_hdr_leng;        // layer_3, IPv4 header_length
input          ipp_info_valid;      // pkt data valid    
input          ipp_start_tcp;       // start a tcp checksum
input          ipp_pkt_end;         // end of the pkt data
input   [16:0] ipp_max_bytes;       // pio program: maximum bytes for a pkt to pass checksum
input          reset;
input          clk;
output         sum_prt_started;     // the sum_unit is busy, processing a pkt
output         sum_prt_valid;       // the following checksum outputs are valid
output         sum_prt_fail;        // the checked result is a failure
output  [15:0] sum_prt_cksum;       // the check sum 
output  [15:0] sum_prt_length;      // the IPv4,6's IP length field
output  [31:0] sum_prt_state;       // the states of the checksum_unit 

wire           sum_prt_started;
wire           sum_prt_valid;
wire           sum_prt_fail;
wire    [15:0] sum_prt_cksum;
wire    [15:0] sum_prt_length;
wire    [31:0] sum_prt_state;

/* ---------- sum data -------- */
wire           c_dsum_fail;
wire    [15:0] tcp_prt_cksum;

/* ---------- sum ctrl -------- */
wire           clr;
wire     [3:0] hdr_off;
wire     [1:0] sel_awd;
wire     [7:0] sel_asw;
wire     [7:0] sel_bwd;
wire           sel_add;
wire    [15:0] byt_ena;
wire    [15:0] udp_dat_len_r;
wire           get_uln;
wire           add_uln;

wire           tcp_prt_fail;
wire    [15:0] tcp_prt_length;
wire    [31:0] tcp_prt_state;

wire   [127:0] din_wrd;
wire   [127:0] din_wrd_d;

wire           ipp_start = ipp_start_tcp;
wire           ipp_start_d;
wire           clr_prt   = ipp_start && !ipp_start_d || reset;
wire           clr_sum;

wire           sum_prt_fail_d;
wire    [15:0] sum_prt_cksum_d;
wire    [15:0] sum_prt_length_d;

//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

  assign sum_prt_fail     = sum_prt_valid ? tcp_prt_fail         : sum_prt_fail_d;
  assign sum_prt_cksum    = sum_prt_valid ? tcp_prt_cksum[15:0]  : sum_prt_cksum_d[15:0];
  assign sum_prt_length   = sum_prt_valid ? tcp_prt_length[15:0] : sum_prt_length_d[15:0];

  niu_ipp_sum_data sum_data (
                             .din_wrd              (din_wrd_d[127:0]),
                             .hdr_off              (hdr_off[3:0]),
                             .byt_ena              (byt_ena[15:0]),
                             .sel_awd              (sel_awd[1:0]),
                             .sel_asw7             (sel_asw[7]),
                             .sel_asw6             (sel_asw[6]),
                             .sel_asw5             (sel_asw[5]),
                             .sel_asw3             (sel_asw[3]),
                             .sel_asw2             (sel_asw[2]),
                             .sel_asw1             (sel_asw[1]),
                             .sel_bwd7             (sel_bwd[7]),
                             .sel_bwd5             (sel_bwd[5]),
                             .sel_bwd4             (sel_bwd[4]),
                             .sel_bwd3             (sel_bwd[3]),
                             .sel_bwd1             (sel_bwd[1]),
                             .sel_add              (sel_add),
                             .inp_uln              (udp_dat_len_r[15:0]),
                             .get_uln              (get_uln),
                             .add_uln              (add_uln),
                             .clr                  (clr_sum),
                             .clk                  (clk),
                             .sum_prt_cksum        (tcp_prt_cksum[15:0]),
                             .c_dsum_fail          (c_dsum_fail) 
                            );

  niu_ipp_sum_ctrl sum_ctrl (
                             .din_wrd              (din_wrd[127:0]),
                             .port_num             (port_num),
                             .ipp_full_cksum       (ipp_full_cksum),
                             .ipp_la4_prot         (ipp_la4_prot[1:0]),
                             .ipp_la3_vers         (ipp_la3_vers[1:0]),
                             .ipp_la2_opti         (ipp_la2_opti[1:0]),
                             .ip4_hdr_leng         (ip4_hdr_leng[3:0]),
                             .ipp_info_valid       (ipp_info_valid),
                             .ipp_start_cksum      (ipp_start_tcp),
                             .ipp_pkt_end          (ipp_pkt_end),
                             .ipp_max_bytes        (ipp_max_bytes[16:0]),
                             .c_dsum_fail          (c_dsum_fail),
                             .reset                (reset),
                             .clk                  (clk),
                             .clr                  (clr),
                             .hdr_off              (hdr_off[3:0]),
                             .sel_awd              (sel_awd[1:0]),
                             .sel_asw              (sel_asw[7:0]),
                             .sel_bwd              (sel_bwd[7:0]),
                             .sel_add              (sel_add),
                             .byt_ena              (byt_ena[15:0]),
                             .udp_dat_len_r        (udp_dat_len_r[15:0]),
                             .get_uln              (get_uln),
                             .add_uln              (add_uln),
                             .sum_prt_started      (sum_prt_started),
                             .sum_prt_valid        (sum_prt_valid),
                             .sum_prt_fail         (tcp_prt_fail),
                             .sum_prt_length       (tcp_prt_length[15:0]),
                             .sum_prt_state        (tcp_prt_state[31:0]) 
                            );

  assign din_wrd =
                  {ipp_din_dat[007:000],ipp_din_dat[015:008],ipp_din_dat[023:016],ipp_din_dat[031:024],
                   ipp_din_dat[039:032],ipp_din_dat[047:040],ipp_din_dat[055:048],ipp_din_dat[063:056],
                   ipp_din_dat[071:064],ipp_din_dat[079:072],ipp_din_dat[087:080],ipp_din_dat[095:088],
                   ipp_din_dat[103:096],ipp_din_dat[111:104],ipp_din_dat[119:112],ipp_din_dat[127:120]};

  ipp_sum_reg_r_1    su_reg_r_1_clr  (clr,                                 reset,  clk,clr_sum);
  ipp_sum_reg_r_1    su_reg_r_1_sta  (ipp_start,                           reset,  clk,ipp_start_d);
  ipp_sum_reg_r_128  su_reg_r_128_wrd(din_wrd[127:0],                      reset,  clk,din_wrd_d[127:0]);
  ipp_sum_reg_r_1    su_reg_r_1_fai  (sum_prt_fail,                        clr_prt,clk,sum_prt_fail_d);
  ipp_sum_reg_r_16   su_reg_r_16_sum (sum_prt_cksum[15:0],                 clr_prt,clk,sum_prt_cksum_d[15:0]);
  ipp_sum_reg_r_16   su_reg_r_16_len (sum_prt_length[15:0],                clr_prt,clk,sum_prt_length_d[15:0]);
  ipp_sum_reg_r_9_s0 su_reg_w_r_9_s0 (tcp_prt_state[08:0],                 reset,  clk,sum_prt_state[08:0]);
  ipp_sum_reg_w_r_23 su_reg_w_r_23_st(tcp_prt_state[31:9], sum_prt_started,clr_prt,clk,sum_prt_state[31:9]);


endmodule
Commit	Line	Data
86530b38 AT	1	// ========== Copyright Header Begin ==========================================
	2	//
	3	// OpenSPARC T2 Processor File: niu_ipp_sum_unit.v
	4	// Copyright (C) 1995-2007 Sun Microsystems, Inc. All Rights Reserved
	5	// 4150 Network Circle, Santa Clara, California 95054, U.S.A.
	6	//
	7	// * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	8	//
	9	// This program is free software; you can redistribute it and/or modify
	10	// it under the terms of the GNU General Public License as published by
	11	// the Free Software Foundation; version 2 of the License.
	12	//
	13	// This program is distributed in the hope that it will be useful,
	14	// but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	// GNU General Public License for more details.
	17	//
	18	// You should have received a copy of the GNU General Public License
	19	// along with this program; if not, write to the Free Software
	20	// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	21	//
	22	// For the avoidance of doubt, and except that if any non-GPL license
	23	// choice is available it will apply instead, Sun elects to use only
	24	// the General Public License version 2 (GPLv2) at this time for any
	25	// software where a choice of GPL license versions is made
	26	// available with the language indicating that GPLv2 or any later version
	27	// may be used, or where a choice of which version of the GPL is applied is
	28	// otherwise unspecified.
	29	//
	30	// Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
	31	// CA 95054 USA or visit www.sun.com if you need additional information or
	32	// have any questions.
	33	//
	34	// ========== Copyright Header End ============================================
	35
	36	`timescale 1ns/10ps
	37
	38	/**********************************************************
	39	***********************************************************
	40
	41	Project : Niu
	42
	43	File name : niu_ipp_sum_unit.v
	44
	45	Module(s) name : niu_ipp_sum_unit
	46	Original: : sum_unit.v main.5, label:
	47
	48	Parent modules : niu_ipp_sum.v
	49
	50	Child modules : niu_ipp_sum_lib.v, niu_ipp_sum.h,
	51	niu_ipp_sum_data.v, niu_ipp_sum_ctrl.v.
	52
	53	Author's name : George Chu
	54
	55	Date : March. 2004
	56
	57	Description : One unit of the ipp checksum.
	58
	59	Synthesis Notes:
	60
	61	Modification History:
	62
	63	Date Description
	64	---- -----------
65
66	************************************************************
67	***********************************************************/
68
69	module niu_ipp_sum_unit (ipp_din_dat, port_num, ipp_full_cksum,
70	ipp_la4_prot, ipp_la3_vers, ipp_la2_opti, ip4_hdr_leng,
71	ipp_info_valid, ipp_start_tcp, ipp_pkt_end, ipp_max_bytes,
72	reset, clk,
73	sum_prt_started, sum_prt_valid,
74	sum_prt_fail, sum_prt_cksum, sum_prt_length,
75	sum_prt_state);
76
77	input [127:0] ipp_din_dat; // pkt data
78	input port_num; // if 1, this sum_unit is enabled
79	input ipp_full_cksum; // if 1, do the full check_sum
80	input [1:0] ipp_la4_prot; // layer_4, protocol, 0:not_interested,1:Tcp,2:Udp,3:SCTP
81	input [1:0] ipp_la3_vers; // layer_3, version, 0:not_interested,1:Ip4,2:Ip6,3:reser
82	input [1:0] ipp_la2_opti; // layer_2, options {LLC,VLAN}
83	input [3:0] ip4_hdr_leng; // layer_3, IPv4 header_length
84	input ipp_info_valid; // pkt data valid
85	input ipp_start_tcp; // start a tcp checksum
86	input ipp_pkt_end; // end of the pkt data
87	input [16:0] ipp_max_bytes; // pio program: maximum bytes for a pkt to pass checksum
88	input reset;
89	input clk;
90	output sum_prt_started; // the sum_unit is busy, processing a pkt
91	output sum_prt_valid; // the following checksum outputs are valid
92	output sum_prt_fail; // the checked result is a failure
93	output [15:0] sum_prt_cksum; // the check sum
94	output [15:0] sum_prt_length; // the IPv4,6's IP length field
95	output [31:0] sum_prt_state; // the states of the checksum_unit
96
97	wire sum_prt_started;
98	wire sum_prt_valid;
99	wire sum_prt_fail;
100	wire [15:0] sum_prt_cksum;
101	wire [15:0] sum_prt_length;
102	wire [31:0] sum_prt_state;
103
104	/* ---------- sum data -------- */
105	wire c_dsum_fail;
106	wire [15:0] tcp_prt_cksum;
107
108	/* ---------- sum ctrl -------- */
109	wire clr;
110	wire [3:0] hdr_off;
111	wire [1:0] sel_awd;
112	wire [7:0] sel_asw;
113	wire [7:0] sel_bwd;
114	wire sel_add;
115	wire [15:0] byt_ena;
116	wire [15:0] udp_dat_len_r;
117	wire get_uln;
118	wire add_uln;
119
120	wire tcp_prt_fail;
121	wire [15:0] tcp_prt_length;
122	wire [31:0] tcp_prt_state;
123
124	wire [127:0] din_wrd;
125	wire [127:0] din_wrd_d;
126
127	wire ipp_start = ipp_start_tcp;
128	wire ipp_start_d;
129	wire clr_prt = ipp_start && !ipp_start_d \|\| reset;
130	wire clr_sum;
131
132	wire sum_prt_fail_d;
133	wire [15:0] sum_prt_cksum_d;
134	wire [15:0] sum_prt_length_d;
135
136	//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
137
138	assign sum_prt_fail = sum_prt_valid ? tcp_prt_fail : sum_prt_fail_d;
139	assign sum_prt_cksum = sum_prt_valid ? tcp_prt_cksum[15:0] : sum_prt_cksum_d[15:0];
140	assign sum_prt_length = sum_prt_valid ? tcp_prt_length[15:0] : sum_prt_length_d[15:0];
141
142	niu_ipp_sum_data sum_data (
143	.din_wrd (din_wrd_d[127:0]),
144	.hdr_off (hdr_off[3:0]),
145	.byt_ena (byt_ena[15:0]),
146	.sel_awd (sel_awd[1:0]),
147	.sel_asw7 (sel_asw[7]),
148	.sel_asw6 (sel_asw[6]),
149	.sel_asw5 (sel_asw[5]),
150	.sel_asw3 (sel_asw[3]),
151	.sel_asw2 (sel_asw[2]),
152	.sel_asw1 (sel_asw[1]),
153	.sel_bwd7 (sel_bwd[7]),
154	.sel_bwd5 (sel_bwd[5]),
155	.sel_bwd4 (sel_bwd[4]),
156	.sel_bwd3 (sel_bwd[3]),
157	.sel_bwd1 (sel_bwd[1]),
158	.sel_add (sel_add),
159	.inp_uln (udp_dat_len_r[15:0]),
160	.get_uln (get_uln),
161	.add_uln (add_uln),
162	.clr (clr_sum),
163	.clk (clk),
164	.sum_prt_cksum (tcp_prt_cksum[15:0]),
165	.c_dsum_fail (c_dsum_fail)
166	);
167
168	niu_ipp_sum_ctrl sum_ctrl (
169	.din_wrd (din_wrd[127:0]),
170	.port_num (port_num),
171	.ipp_full_cksum (ipp_full_cksum),
172	.ipp_la4_prot (ipp_la4_prot[1:0]),
173	.ipp_la3_vers (ipp_la3_vers[1:0]),
174	.ipp_la2_opti (ipp_la2_opti[1:0]),
175	.ip4_hdr_leng (ip4_hdr_leng[3:0]),
176	.ipp_info_valid (ipp_info_valid),
177	.ipp_start_cksum (ipp_start_tcp),
178	.ipp_pkt_end (ipp_pkt_end),
179	.ipp_max_bytes (ipp_max_bytes[16:0]),
180	.c_dsum_fail (c_dsum_fail),
181	.reset (reset),
182	.clk (clk),
183	.clr (clr),
184	.hdr_off (hdr_off[3:0]),
185	.sel_awd (sel_awd[1:0]),
186	.sel_asw (sel_asw[7:0]),
187	.sel_bwd (sel_bwd[7:0]),
188	.sel_add (sel_add),
189	.byt_ena (byt_ena[15:0]),
190	.udp_dat_len_r (udp_dat_len_r[15:0]),
191	.get_uln (get_uln),
192	.add_uln (add_uln),
193	.sum_prt_started (sum_prt_started),
194	.sum_prt_valid (sum_prt_valid),
195	.sum_prt_fail (tcp_prt_fail),
196	.sum_prt_length (tcp_prt_length[15:0]),
197	.sum_prt_state (tcp_prt_state[31:0])
198	);
199
200	assign din_wrd =
201	{ipp_din_dat[007:000],ipp_din_dat[015:008],ipp_din_dat[023:016],ipp_din_dat[031:024],
202	ipp_din_dat[039:032],ipp_din_dat[047:040],ipp_din_dat[055:048],ipp_din_dat[063:056],
203	ipp_din_dat[071:064],ipp_din_dat[079:072],ipp_din_dat[087:080],ipp_din_dat[095:088],
204	ipp_din_dat[103:096],ipp_din_dat[111:104],ipp_din_dat[119:112],ipp_din_dat[127:120]};
205
206	ipp_sum_reg_r_1 su_reg_r_1_clr (clr, reset, clk,clr_sum);
207	ipp_sum_reg_r_1 su_reg_r_1_sta (ipp_start, reset, clk,ipp_start_d);
208	ipp_sum_reg_r_128 su_reg_r_128_wrd(din_wrd[127:0], reset, clk,din_wrd_d[127:0]);
209	ipp_sum_reg_r_1 su_reg_r_1_fai (sum_prt_fail, clr_prt,clk,sum_prt_fail_d);
210	ipp_sum_reg_r_16 su_reg_r_16_sum (sum_prt_cksum[15:0], clr_prt,clk,sum_prt_cksum_d[15:0]);
211	ipp_sum_reg_r_16 su_reg_r_16_len (sum_prt_length[15:0], clr_prt,clk,sum_prt_length_d[15:0]);
212	ipp_sum_reg_r_9_s0 su_reg_w_r_9_s0 (tcp_prt_state[08:0], reset, clk,sum_prt_state[08:0]);
213	ipp_sum_reg_w_r_23 su_reg_w_r_23_st(tcp_prt_state[31:9], sum_prt_started,clr_prt,clk,sum_prt_state[31:9]);
214
215
216	endmodule