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1 | // ========== Copyright Header Begin ========================================== |
2 | // | |
3 | // OpenSPARC T2 Processor File: fc_dmupeu_csr_probe.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 | `include "fc.vh" | |
36 | `include "defines.vh" | |
37 | ||
38 | module fc_dmupeu_csr_probe; | |
39 | ||
40 | reg [1:0] state; | |
41 | integer dmupeu_csr; | |
42 | ||
43 | parameter IDLE = 0, DATA1 = 1, DATA2 = 2; | |
44 | ||
45 | wire clk = `DMU.l1clk; | |
46 | wire rst_ = `DMU.wmr_; | |
47 | wire [`FIRE_CSR_CMND_BITS] cmd; | |
48 | reg [`FIRE_CSR_DATA_BITS] data; | |
49 | reg [`FIRE_CSR_ADDR_BITS] addr; | |
50 | reg [63:0] nas_addr; | |
51 | wire [`FIRE_CSR_RING_BITS] csr_ring_in = `DMU.d2j_csr_ring_in; | |
52 | ||
53 | assign cmd = csr_ring_in[`FIRE_CSR_RING_CMND_BITS]; | |
54 | ||
55 | wire vld_read_rsp = (cmd == `FIRE_CSR_CMND_RRSP) ; | |
56 | wire req_vld = (cmd != `FIRE_CSR_CMND_IDLE) ; | |
57 | ||
58 | always @ (negedge clk or negedge rst_) begin | |
59 | if (rst_ !== 1'b1) begin | |
60 | state = IDLE; | |
61 | data = {`FIRE_CSR_DATA_WIDTH{1'b0}}; | |
62 | addr = {`FIRE_CSR_ADDR_MAX_WIDTH{1'b1}}; | |
63 | end | |
64 | else begin | |
65 | case (state) | |
66 | IDLE: begin | |
67 | if(req_vld) begin | |
68 | if(vld_read_rsp) begin | |
69 | addr = csr_ring_in[`FIRE_CSR_RING_ADDR_BITS]; | |
70 | end | |
71 | state = DATA1; | |
72 | end | |
73 | end | |
74 | ||
75 | DATA1: begin | |
76 | data[`FIRE_CSR_RDMS_BITS] = csr_ring_in; | |
77 | state = DATA2; | |
78 | end | |
79 | ||
80 | DATA2: begin | |
81 | data[`FIRE_CSR_RDLS_BITS] = csr_ring_in; | |
82 | state = IDLE; | |
83 | ||
84 | if (`PARGS.nas_check_on && `PARGS.soc_sync_on && addr != 27'h7ffffff) begin | |
85 | nas_addr = {24'h0, 8'h88, 2'h0, addr, 3'b000}; | |
86 | `PR_INFO ("dmupeu_csr_probe", `INFO, "ts=%0d DMU/PEU CSR READ RETURN: address %x data %x ", | |
87 | `TOP.core_cycle_cnt-1, nas_addr, data); | |
88 | dmupeu_csr = $sim_send(`PLI_CSR_READ, nas_addr, data, 8'h0); | |
89 | end | |
90 | addr = {`FIRE_CSR_ADDR_MAX_WIDTH{1'b1}}; | |
91 | end | |
92 | ||
93 | default: | |
94 | `PR_ERROR("dmupeu_csr_probe", `ERROR, "ts=%0d illegal state=%x", `TOP.core_cycle_cnt-1, state); | |
95 | ||
96 | endcase // case(state) | |
97 | end // else: !if(!`DMU.wmr_) | |
98 | end // always @ (negedge `DMU.l1clk or negedge `DMU.wmr_) | |
99 | ||
100 | endmodule // fc_dmupeu_csr_probe |