| 1 | // ========== Copyright Header Begin ========================================== |
| 2 | // |
| 3 | // OpenSPARC T2 Processor File: fc_niu_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 | `define NIU_UCB `CPU.rdp.niu_pio_ucb |
| 39 | `define NIU_PIO `CPU.rdp.niu_pio |
| 40 | `define FM_MAX 12'hfff |
| 41 | |
| 42 | module fc_niu_csr_probe; |
| 43 | reg [26:0] addr[4095:0]; |
| 44 | reg [63:0] data; |
| 45 | reg [11:0] wrptr; |
| 46 | reg [11:0] rdptr; |
| 47 | |
| 48 | integer niu_csr; |
| 49 | integer i; |
| 50 | |
| 51 | initial begin |
| 52 | wrptr = 12'h0; |
| 53 | rdptr = 12'h0; |
| 54 | end |
| 55 | |
| 56 | always @ (`NIU_PIO.ucb_rd_req or `NIU_PIO.fifo_wr_en) begin |
| 57 | if ((`NIU_PIO.ucb_rd_req == 1'b1) && (`NIU_PIO.fifo_wr_en == 1'b1)) begin |
| 58 | addr[wrptr] = `NIU_PIO.ucb_addr; |
| 59 | `PR_INFO ("niu_csr_probe", `INFO, "ts=%d addr[%h] gets %h\n", `TOP.core_cycle_cnt-1, wrptr, `NIU_PIO.ucb_addr); |
| 60 | if (wrptr == `FM_MAX) |
| 61 | wrptr = 12'h0; |
| 62 | else |
| 63 | wrptr = wrptr + 1; |
| 64 | end |
| 65 | end |
| 66 | |
| 67 | |
| 68 | always @ (posedge `NIU_UCB.rd_ack_vld or posedge `NIU_UCB.rd_nack_vld) begin |
| 69 | if (wrptr == rdptr) begin |
| 70 | `PR_ERROR("niu_csr_probe", `ERROR, "A data phase without an address phase received"); |
| 71 | end |
| 72 | else begin |
| 73 | data = {`NIU_UCB.data_out[7:0],`NIU_UCB.data_out[15:8],`NIU_UCB.data_out[23:16],`NIU_UCB.data_out[31:24],`NIU_UCB.data_out[39:32],`NIU_UCB.data_out[47:40],`NIU_UCB.data_out[55:48],`NIU_UCB.data_out[63:56]} ; |
| 74 | `PR_INFO ("niu_csr_probe", `INFO, "ts=%0d NIU CSR READ RETURN: address %x data %x ", |
| 75 | `TOP.core_cycle_cnt-1, {24'h0, 8'h81, 5'h0, addr[rdptr]}, data); |
| 76 | if (`PARGS.nas_check_on ) |
| 77 | niu_csr = $sim_send(`PLI_CSR_READ, {24'h0, 8'h81, 5'h0, addr[rdptr]}, data, 8'h01); |
| 78 | if (rdptr == `FM_MAX) |
| 79 | rdptr = 12'h0; |
| 80 | else |
| 81 | rdptr = rdptr + 1; |
| 82 | end |
| 83 | |
| 84 | end // always @ (posedge |
| 85 | |
| 86 | |
| 87 | endmodule // fc_niu_csr_probe |