[Cryptech-Commits] [staging/core/platform/common] 01/01: Rearrange cores.
git at cryptech.is
git at cryptech.is
Tue Mar 17 13:17:20 UTC 2015
This is an automated email from the git hooks/post-receive script.
paul at psgd.org pushed a commit to branch master
in repository staging/core/platform/common.
commit 63c5dae7baada6cc8f459f23d5840c56250d8bf7
Author: Paul Selkirk <pselkirk at isc.org>
Date: Tue Mar 17 13:49:25 2015 +0100
Rearrange cores.
---
README.md | 8 ++
core_selector/src/rtl/cipher_selector.v | 117 ++++++++++++++++
core_selector/src/rtl/core_selector.v | 212 ++++++++++++++++++++++++++++
core_selector/src/rtl/global_selector.v | 196 ++++++++++++++++++++++++++
core_selector/src/rtl/hash_selector.v | 237 ++++++++++++++++++++++++++++++++
core_selector/src/rtl/rng_selector.v | 112 +++++++++++++++
6 files changed, 882 insertions(+)
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..0630499
--- /dev/null
+++ b/README.md
@@ -0,0 +1,8 @@
+platform/common
+===============
+
+Support code that is used to build projects, but not tied to a particular platform.
+
+## Introduction ##
+At present, this contains core_selector, a set of muxes to select a core
+by the most significant address bits of a memory-like architecture.
diff --git a/core_selector/src/rtl/cipher_selector.v b/core_selector/src/rtl/cipher_selector.v
new file mode 100644
index 0000000..c7ae812
--- /dev/null
+++ b/core_selector/src/rtl/cipher_selector.v
@@ -0,0 +1,117 @@
+//======================================================================
+//
+// cipher_selector.v
+// -----------------
+// Top level wrapper that creates the Cryptech coretest system.
+// The wrapper contains instances of external interface, coretest
+// and the core to be tested. And if more than one core is
+// present the wrapper also includes address and data muxes.
+//
+//
+// Authors: Joachim Strombergson, Paul Selkirk, Pavel Shatov
+// Copyright (c) 2014-2015, NORDUnet A/S All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// - Redistributions of source code must retain the above copyright notice,
+// this list of conditions and the following disclaimer.
+//
+// - Redistributions in binary form must reproduce the above copyright
+// notice, this list of conditions and the following disclaimer in the
+// documentation and/or other materials provided with the distribution.
+//
+// - Neither the name of the NORDUnet nor the names of its contributors may
+// be used to endorse or promote products derived from this software
+// without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+// PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+// TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+//======================================================================
+
+module cipher_selector
+ (
+ input wire sys_clk,
+ input wire sys_rst,
+ input wire sys_ena,
+
+ input wire [13: 0] sys_eim_addr,
+ input wire sys_eim_wr,
+ input wire sys_eim_rd,
+ output wire [31 : 0] sys_read_data,
+ input wire [31 : 0] sys_write_data
+ );
+
+
+ //
+ // Output Register
+ //
+ reg [31: 0] tmp_read_data;
+ assign sys_read_data = tmp_read_data;
+
+
+ /* So far we have no CIPHER cores, let's make some dummy 32-bit registers here
+ * to prevent ISE from complaining that we don't use input ports.
+ */
+
+ reg [31: 0] reg_dummy_first;
+ reg [31: 0] reg_dummy_second;
+ reg [31: 0] reg_dummy_third;
+
+ always @(posedge sys_clk)
+ //
+ if (sys_rst)
+ begin
+ reg_dummy_first <= {8{4'hD}};
+ reg_dummy_second <= {8{4'hE}};
+ reg_dummy_third <= {8{4'hF}};
+ end
+ else if (sys_ena)
+ begin
+ //
+ if (sys_eim_wr)
+ begin
+ //
+ // WRITE handler
+ //
+ case (sys_eim_addr)
+ 14'd0: reg_dummy_first <= sys_write_data;
+ 14'd1: reg_dummy_second <= sys_write_data;
+ 14'd2: reg_dummy_third <= sys_write_data;
+ endcase
+ //
+ end
+ //
+ if (sys_eim_rd)
+ begin
+ //
+ // READ handler
+ //
+ case (sys_eim_addr)
+ 14'd0: tmp_read_data <= reg_dummy_first;
+ 14'd1: tmp_read_data <= reg_dummy_second;
+ 14'd2: tmp_read_data <= reg_dummy_third;
+ //
+ default: tmp_read_data <= {32{1'b0}}; // read non-existent locations as zeroes
+ endcase
+ //
+ end
+ //
+ end
+
+
+endmodule
+
+//======================================================================
+// EOF cipher_selector.v
+//======================================================================
diff --git a/core_selector/src/rtl/core_selector.v b/core_selector/src/rtl/core_selector.v
new file mode 100644
index 0000000..1cd1d94
--- /dev/null
+++ b/core_selector/src/rtl/core_selector.v
@@ -0,0 +1,212 @@
+//======================================================================
+//
+// core_selector.v
+// ---------------
+// Top level wrapper that creates the Cryptech coretest system.
+// The wrapper contains instances of external interface, coretest
+// and the core to be tested. And if more than one core is
+// present the wrapper also includes address and data muxes.
+//
+//
+// Author: Pavel Shatov
+// Copyright (c) 2014-2015, NORDUnet A/S All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// - Redistributions of source code must retain the above copyright notice,
+// this list of conditions and the following disclaimer.
+//
+// - Redistributions in binary form must reproduce the above copyright
+// notice, this list of conditions and the following disclaimer in the
+// documentation and/or other materials provided with the distribution.
+//
+// - Neither the name of the NORDUnet nor the names of its contributors may
+// be used to endorse or promote products derived from this software
+// without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+// PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+// TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+//======================================================================
+
+module core_selector
+ (
+ input wire sys_clk,
+ input wire sys_rst,
+
+ input wire [16: 0] sys_eim_addr,
+ input wire sys_eim_wr,
+ input wire sys_eim_rd,
+ output wire [31: 0] sys_read_data,
+ input wire [31: 0] sys_write_data
+ );
+
+
+ /* Three upper bits of address [16:14] are used to select memory segment.
+ * There can be eight segments. So far segment 0 is used for global
+ * registers, segment 1 is used for hashes, segment 2 is reserved for
+ * random number generators, segment 3 is reserved for chiphers. Other
+ * segments are not used so far.
+ */
+
+ /* Every segment has its own memory map, take at look at corresponding
+ * selectors for more information.
+ */
+
+ //----------------------------------------------------------------
+ // Segment Decoder
+ //----------------------------------------------------------------
+ localparam SEGMENT_ADDR_GLOBALS = 3'd0;
+ localparam SEGMENT_ADDR_HASHES = 3'd1;
+ localparam SEGMENT_ADDR_RNGS = 3'd2;
+ localparam SEGMENT_ADDR_CIPHERS = 3'd3;
+
+ wire [ 2: 0] addr_segment = sys_eim_addr[16:14]; // 3 upper bits are decoded here
+ wire [13: 0] addr_segment_int = sys_eim_addr[13: 0]; // 14 lower bits are decoded individually
+ // in corresponding segment selectors
+
+ wire [31: 0] segment_globals_read_data; // data read from GLOBALS segment
+ wire [31: 0] segment_hashes_read_data; // data read from HASHES segment
+ wire [31: 0] segment_rngs_read_data; // data read from RNGS segment
+ wire [31: 0] segment_ciphers_read_data; // data read from CIPHERS segment
+
+ wire segment_enable_globals = (addr_segment == SEGMENT_ADDR_GLOBALS) ? 1'b1 : 1'b0; // GLOBALS segment is being addressed
+ wire segment_enable_hashes = (addr_segment == SEGMENT_ADDR_HASHES) ? 1'b1 : 1'b0; // HASHES segment is being addressed
+ wire segment_enable_rngs = (addr_segment == SEGMENT_ADDR_RNGS) ? 1'b1 : 1'b0; // RNGS segment is being addressed
+ wire segment_enable_ciphers = (addr_segment == SEGMENT_ADDR_CIPHERS) ? 1'b1 : 1'b0; // CIPHERS segment is being addressed
+
+
+ //----------------------------------------------------------------
+ // Output (Read Data) Bus
+ //----------------------------------------------------------------
+ reg [31: 0] sys_read_data_reg;
+ assign sys_read_data = sys_read_data_reg;
+
+ always @*
+ //
+ case (addr_segment)
+ SEGMENT_ADDR_GLOBALS: sys_read_data_reg = segment_globals_read_data;
+ SEGMENT_ADDR_HASHES: sys_read_data_reg = segment_hashes_read_data;
+ SEGMENT_ADDR_RNGS: sys_read_data_reg = segment_rngs_read_data;
+ SEGMENT_ADDR_CIPHERS: sys_read_data_reg = segment_ciphers_read_data;
+ default: sys_read_data_reg = {32{1'b0}};
+ endcase
+
+
+
+ //----------------------------------------------------------------
+ // GLOBAL Core Selector
+ //
+ // This selector is used to map core registers into
+ // EIM address space and select which core to send EIM read and
+ // write operations to.
+ //----------------------------------------------------------------
+ global_selector globals
+ (
+ .sys_clk(sys_clk),
+ .sys_rst(sys_rst),
+
+ .sys_ena(segment_enable_globals), // only enable active selector
+
+ .sys_eim_addr(addr_segment_int), // we only connect 14 lower bits of address here,
+ // because we have already decoded 3 upper bits earlier,
+ // every segment can have its own address decoder.
+ .sys_eim_wr(sys_eim_wr),
+ .sys_eim_rd(sys_eim_rd),
+
+ .sys_write_data(sys_write_data),
+ .sys_read_data(segment_globals_read_data) // output from GLOBALS segment
+ );
+
+
+ //----------------------------------------------------------------
+ // HASH Core Selector
+ //
+ // This selector is used to map core registers into
+ // EIM address space and select which core to send EIM read and
+ // write operations to.
+ //----------------------------------------------------------------
+ hash_selector hashes
+ (
+ .sys_clk(sys_clk),
+ .sys_rst(sys_rst),
+
+ .sys_ena(segment_enable_hashes), // only enable active selector
+
+ .sys_eim_addr(addr_segment_int), // we only connect 14 lower bits of address here,
+ // because we have already decoded 3 upper bits earlier,
+ // every segment can have its own address decoder.
+ .sys_eim_wr(sys_eim_wr),
+ .sys_eim_rd(sys_eim_rd),
+
+ .sys_write_data(sys_write_data),
+ .sys_read_data(segment_hashes_read_data) // output from HASHES segment
+ );
+
+
+ //----------------------------------------------------------------
+ // RNG Selector
+ //
+ // This selector is used to map random number generator registers into
+ // EIM address space and select which RNG to send EIM read and
+ // write operations to. So far there are no RNG cores.
+ //----------------------------------------------------------------
+ rng_selector rngs
+ (
+ .sys_clk(sys_clk),
+ .sys_rst(sys_rst),
+
+ .sys_ena(segment_enable_rngs), // only enable active selector
+
+ .sys_eim_addr(addr_segment_int), // we only connect 14 lower bits of address here,
+ // because we have already decoded 3 upper bits earlier,
+ // every segment can have its own address decoder.
+ .sys_eim_wr(sys_eim_wr),
+ .sys_eim_rd(sys_eim_rd),
+
+ .sys_write_data(sys_write_data),
+ .sys_read_data(segment_rngs_read_data) // output from RNGS segment
+ );
+
+
+ //----------------------------------------------------------------
+ // CIPHER Selector
+ //
+ // This selector is used to map cipher registers into
+ // EIM address space and select which CIPHER to send EIM read and
+ // write operations to. So far there are no CIPHER cores.
+ //----------------------------------------------------------------
+ cipher_selector ciphers
+ (
+ .sys_clk(sys_clk),
+ .sys_rst(sys_rst),
+
+ .sys_ena(segment_enable_ciphers), // only enable active selector
+
+ .sys_eim_addr(addr_segment_int), // we only connect 14 lower bits of address here,
+ // because we have already decoded 3 upper bits earlier,
+ // every segment can have its own address decoder.
+ .sys_eim_wr(sys_eim_wr),
+ .sys_eim_rd(sys_eim_rd),
+
+ .sys_write_data(sys_write_data),
+ .sys_read_data(segment_ciphers_read_data) // output from CIPHERS segment
+ );
+
+
+endmodule
+
+
+//======================================================================
+// EOF eim_memory.v
+//======================================================================
diff --git a/core_selector/src/rtl/global_selector.v b/core_selector/src/rtl/global_selector.v
new file mode 100644
index 0000000..993f237
--- /dev/null
+++ b/core_selector/src/rtl/global_selector.v
@@ -0,0 +1,196 @@
+//======================================================================
+//
+// global_selector.v
+// -----------------
+// Top level wrapper that creates the Cryptech coretest system.
+// The wrapper contains instances of external interface, coretest
+// and the core to be tested. And if more than one core is
+// present the wrapper also includes address and data muxes.
+//
+//
+// Authors: Joachim Strombergson, Paul Selkirk, Pavel Shatov
+// Copyright (c) 2014-2015, NORDUnet A/S All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// - Redistributions of source code must retain the above copyright notice,
+// this list of conditions and the following disclaimer.
+//
+// - Redistributions in binary form must reproduce the above copyright
+// notice, this list of conditions and the following disclaimer in the
+// documentation and/or other materials provided with the distribution.
+//
+// - Neither the name of the NORDUnet nor the names of its contributors may
+// be used to endorse or promote products derived from this software
+// without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+// PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+// TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+//======================================================================
+
+module global_selector
+ (
+ input wire sys_clk,
+ input wire sys_rst,
+ input wire sys_ena,
+
+ input wire [13: 0] sys_eim_addr,
+ input wire sys_eim_wr,
+ input wire sys_eim_rd,
+ output wire [31 : 0] sys_read_data,
+ input wire [31 : 0] sys_write_data
+ );
+
+
+ //----------------------------------------------------------------
+ // Address Decoder
+ //----------------------------------------------------------------
+ wire [ 5: 0] addr_core_num = sys_eim_addr[13: 8]; // upper 6 bits specify core being addressed
+ wire [ 7: 0] addr_core_reg = sys_eim_addr[ 7: 0]; // lower 8 bits specify register offset in core
+
+
+ //----------------------------------------------------------------
+ // Core Address Table
+ //----------------------------------------------------------------
+ localparam CORE_ADDR_BOARD_REGS = 6'd0;
+ localparam CORE_ADDR_COMM_REGS = 6'd1;
+
+
+ //----------------------------------------------------------------
+ // Board-Level Registers
+ //----------------------------------------------------------------
+ wire [31: 0] read_data_board;
+ wire enable_board = sys_ena && (addr_core_num == CORE_ADDR_BOARD_REGS);
+ board_regs board_regs
+ (
+ .clk(sys_clk),
+ .rst(sys_rst),
+
+ .cs(enable_board & (sys_eim_rd | sys_eim_wr)),
+ .we(sys_eim_wr),
+
+ .address(addr_core_reg),
+ .write_data(sys_write_data),
+ .read_data(read_data_board)
+ );
+
+
+ //----------------------------------------------------------------
+ // Communication-Channel Registers
+ //----------------------------------------------------------------
+ wire [31: 0] read_data_comm;
+ wire enable_comm = sys_ena && (addr_core_num == CORE_ADDR_COMM_REGS);
+ comm_regs comm_regs
+ (
+ .clk(sys_clk),
+ .rst(sys_rst),
+
+ .cs(enable_comm & (sys_eim_rd | sys_eim_wr)),
+ .we(sys_eim_wr),
+
+ .address(addr_core_reg),
+ .write_data(sys_write_data),
+ .read_data(read_data_comm)
+ );
+
+
+ //----------------------------------------------------------------
+ // SHA-1
+ //----------------------------------------------------------------
+ `ifdef USE_CORE_SHA1
+ wire [31: 0] read_data_sha1;
+ wire enable_sha1 = sys_ena && (addr_core_num == CORE_ADDR_SHA1);
+ sha1 sha1_inst
+ (
+ .clk(sys_clk),
+ .reset_n(~sys_rst),
+
+ .cs(enable_sha1 & (sys_eim_rd | sys_eim_wr)),
+ .we(sys_eim_wr),
+
+ .address(addr_core_reg),
+ .write_data(sys_write_data),
+ .read_data(read_data_sha1)
+ );
+ `endif
+
+
+ //----------------------------------------------------------------
+ // SHA-256
+ //----------------------------------------------------------------
+ `ifdef USE_CORE_SHA256
+ wire [31: 0] read_data_sha256;
+ wire enable_sha256 = sys_ena && (addr_core_num == CORE_ADDR_SHA256);
+ sha256 sha256_inst
+ (
+ .clk(sys_clk),
+ .reset_n(~sys_rst),
+
+ .cs(enable_sha256 & (sys_eim_rd | sys_eim_wr)),
+ .we(sys_eim_wr),
+
+ .address(addr_core_reg),
+ .write_data(sys_write_data),
+ .read_data(read_data_sha256)
+ );
+ `endif
+
+
+ //----------------------------------------------------------------
+ // SHA-512
+ //----------------------------------------------------------------
+ `ifdef USE_CORE_SHA512
+ wire [31: 0] read_data_sha512;
+ wire enable_sha512 = sys_ena && (addr_core_num == CORE_ADDR_SHA512);
+ sha512 sha512_inst
+ (
+ .clk(sys_clk),
+ .reset_n(~sys_rst),
+
+ .cs(enable_sha512 & (sys_eim_rd | sys_eim_wr)),
+ .we(sys_eim_wr),
+
+ .address(addr_core_reg),
+ .write_data(sys_write_data),
+ .read_data(read_data_sha512)
+ );
+ `endif
+
+
+ //----------------------------------------------------------------
+ // Output (Read Data) Multiplexor
+ //----------------------------------------------------------------
+ reg [31: 0] sys_read_data_mux;
+ assign sys_read_data = sys_read_data_mux;
+
+ always @*
+ //
+ case (addr_core_num)
+ //
+ CORE_ADDR_BOARD_REGS:
+ sys_read_data_mux = read_data_board;
+ CORE_ADDR_COMM_REGS:
+ sys_read_data_mux = read_data_comm;
+ //
+ default:
+ sys_read_data_mux = {32{1'b0}};
+ //
+ endcase
+
+
+endmodule
+
+//======================================================================
+// EOF global_selector.v
+//======================================================================
diff --git a/core_selector/src/rtl/hash_selector.v b/core_selector/src/rtl/hash_selector.v
new file mode 100644
index 0000000..66806b6
--- /dev/null
+++ b/core_selector/src/rtl/hash_selector.v
@@ -0,0 +1,237 @@
+//======================================================================
+//
+// hash_selector.v
+// ---------------
+// Top level wrapper that creates the Cryptech coretest system.
+// The wrapper contains instances of external interface, coretest
+// and the core to be tested. And if more than one core is
+// present the wrapper also includes address and data muxes.
+//
+//
+// Authors: Joachim Strombergson, Paul Selkirk, Pavel Shatov
+// Copyright (c) 2014-2015, NORDUnet A/S All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// - Redistributions of source code must retain the above copyright notice,
+// this list of conditions and the following disclaimer.
+//
+// - Redistributions in binary form must reproduce the above copyright
+// notice, this list of conditions and the following disclaimer in the
+// documentation and/or other materials provided with the distribution.
+//
+// - Neither the name of the NORDUnet nor the names of its contributors may
+// be used to endorse or promote products derived from this software
+// without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+// PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+// TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+//======================================================================
+
+module hash_selector
+ (
+ input wire sys_clk,
+ input wire sys_rst,
+ input wire sys_ena,
+
+ input wire [13 : 0] sys_eim_addr,
+ input wire sys_eim_wr,
+ input wire sys_eim_rd,
+ output wire [31 : 0] sys_read_data,
+ input wire [31 : 0] sys_write_data
+ );
+
+ /* In this memory segment (HASHES) we have 14 address bits. Every core has
+ * 8-bit internal address space, so we can have up to 2^(14-8) = 64 cores here.
+ *
+ * So far we have three cores: SHA-1, SHA-256 and SHA-512.
+ */
+
+ /*********************************************************
+ * To add new HASH core named XXX follow the steps below *
+ *********************************************************
+ *
+ * 1. Add corresponding `define under "List of Available Cores", this will
+ * allow users to exclude your core from implementation to save some
+ * slices in case they don't need it.
+ *
+ * `define USE_CORE_XXX
+XXX define in wrapper core
+ *
+ *
+ * 2. Choose address of your new core and add corresponding line under
+ * "Core Address Table". Core addresses can be in the range from 0 to 63
+ * inclusively.
+ *
+ * localparam CORE_ADDR_XXX = 6'dN;
+XXX move to `define in wrapper core??
+ *
+ *
+ * 3. Add instantiation of your new core after all existing cores
+ * surrounded by conditional synthesis directives.
+ * You also need a 32-bit output (read data) bus for your core and an
+ * enable flag. Note that sys_rst in an active-high sync reset signal.
+ *
+ * `ifdef USE_CORE_XXX
+ * wire [31: 0] read_data_xxx;
+ * wire enable_xxx = sys_ena && (addr_core_num == CORE_ADDR_XXX);
+ * xxx xxx_inst
+ * (
+ * .clk(sys_clk),
+ * .reset_n(~sys_rst),
+ * .cs(enable_xxx & (sys_eim_rd | sys_eim_wr)),
+ * .we(sys_eim_wr),
+ * .address(addr_core_reg),
+ * .write_data(sys_write_data),
+ * .read_data(read_data_xxx),
+ * .error()
+ * );
+ * `endif
+ *
+ *
+ * 4. Add previously created data bus to "Output (Read Data) Multiplexor"
+ * in the end of this file.
+ *
+ * `ifdef USE_CORE_XXX
+ * CORE_ADDR_XXX:
+ * sys_read_data_mux = read_data_xxx;
+ * `endif
+ *
+ */
+
+
+ //----------------------------------------------------------------
+ // Address Decoder
+ //----------------------------------------------------------------
+ wire [ 5: 0] addr_core_num = sys_eim_addr[13: 8]; // upper 6 bits specify core being addressed
+ wire [ 7: 0] addr_core_reg = sys_eim_addr[ 7: 0]; // lower 8 bits specify register offset in core
+
+
+ /* We can comment following lines to exclude cores from implementation
+ * in case we run out of slices.
+ */
+
+ //----------------------------------------------------------------
+ // List of Available Cores
+ //----------------------------------------------------------------
+ `define USE_CORE_SHA1
+ `define USE_CORE_SHA256
+ `define USE_CORE_SHA512
+
+
+ //----------------------------------------------------------------
+ // Core Address Table
+ //----------------------------------------------------------------
+ localparam CORE_ADDR_SHA1 = 6'd0;
+ localparam CORE_ADDR_SHA256 = 6'd1;
+ localparam CORE_ADDR_SHA512 = 6'd2;
+
+
+ //----------------------------------------------------------------
+ // SHA-1
+ //----------------------------------------------------------------
+ `ifdef USE_CORE_SHA1
+ wire [31: 0] read_data_sha1;
+ wire enable_sha1 = sys_ena && (addr_core_num == CORE_ADDR_SHA1);
+ sha1 sha1_inst
+ (
+ .clk(sys_clk),
+ .reset_n(~sys_rst),
+
+ .cs(enable_sha1 & (sys_eim_rd | sys_eim_wr)),
+ .we(sys_eim_wr),
+
+ .address(addr_core_reg),
+ .write_data(sys_write_data),
+ .read_data(read_data_sha1)
+ );
+ `endif
+
+
+ //----------------------------------------------------------------
+ // SHA-256
+ //----------------------------------------------------------------
+ `ifdef USE_CORE_SHA256
+ wire [31: 0] read_data_sha256;
+ wire enable_sha256 = sys_ena && (addr_core_num == CORE_ADDR_SHA256);
+ sha256 sha256_inst
+ (
+ .clk(sys_clk),
+ .reset_n(~sys_rst),
+
+ .cs(enable_sha256 & (sys_eim_rd | sys_eim_wr)),
+ .we(sys_eim_wr),
+
+ .address(addr_core_reg),
+ .write_data(sys_write_data),
+ .read_data(read_data_sha256)
+ );
+ `endif
+
+
+ //----------------------------------------------------------------
+ // SHA-512
+ //----------------------------------------------------------------
+ `ifdef USE_CORE_SHA512
+ wire [31: 0] read_data_sha512;
+ wire enable_sha512 = sys_ena && (addr_core_num == CORE_ADDR_SHA512);
+ sha512 sha512_inst
+ (
+ .clk(sys_clk),
+ .reset_n(~sys_rst),
+
+ .cs(enable_sha512 & (sys_eim_rd | sys_eim_wr)),
+ .we(sys_eim_wr),
+
+ .address(addr_core_reg),
+ .write_data(sys_write_data),
+ .read_data(read_data_sha512)
+ );
+ `endif
+
+
+ //----------------------------------------------------------------
+ // Output (Read Data) Multiplexor
+ //----------------------------------------------------------------
+ reg [31: 0] sys_read_data_mux;
+ assign sys_read_data = sys_read_data_mux;
+
+ always @*
+ //
+ case (addr_core_num)
+ //
+ `ifdef USE_CORE_SHA1
+ CORE_ADDR_SHA1:
+ sys_read_data_mux = read_data_sha1;
+ `endif
+ `ifdef USE_CORE_SHA256
+ CORE_ADDR_SHA256:
+ sys_read_data_mux = read_data_sha256;
+ `endif
+ `ifdef USE_CORE_SHA512
+ CORE_ADDR_SHA512:
+ sys_read_data_mux = read_data_sha512;
+ `endif
+ //
+ default:
+ sys_read_data_mux = {32{1'b0}};
+ //
+ endcase
+
+
+endmodule
+
+//======================================================================
+// EOF hash_selector.v
+//======================================================================
diff --git a/core_selector/src/rtl/rng_selector.v b/core_selector/src/rtl/rng_selector.v
new file mode 100644
index 0000000..d88fe82
--- /dev/null
+++ b/core_selector/src/rtl/rng_selector.v
@@ -0,0 +1,112 @@
+//======================================================================
+//
+// rng_selector.v
+// -----------------
+// Top level wrapper that creates the Cryptech coretest system.
+// The wrapper contains instances of external interface, coretest
+// and the core to be tested. And if more than one core is
+// present the wrapper also includes address and data muxes.
+//
+//
+// Authors: Joachim Strombergson, Paul Selkirk, Pavel Shatov
+// Copyright (c) 2014-2015, NORDUnet A/S All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// - Redistributions of source code must retain the above copyright notice,
+// this list of conditions and the following disclaimer.
+//
+// - Redistributions in binary form must reproduce the above copyright
+// notice, this list of conditions and the following disclaimer in the
+// documentation and/or other materials provided with the distribution.
+//
+// - Neither the name of the NORDUnet nor the names of its contributors may
+// be used to endorse or promote products derived from this software
+// without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+// PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+// TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+//======================================================================
+
+module rng_selector
+ (
+ input wire sys_clk,
+ input wire sys_rst,
+ input wire sys_ena,
+
+ input wire [13: 0] sys_eim_addr,
+ input wire sys_eim_wr,
+ input wire sys_eim_rd,
+ output wire [31 : 0] sys_read_data,
+ input wire [31 : 0] sys_write_data
+ );
+
+
+ //
+ // Output Register
+ //
+ reg [31: 0] tmp_read_data;
+ assign sys_read_data = tmp_read_data;
+
+
+ /* So far we have no RNG cores, let's make some dummy 32-bit registers here
+ * to prevent ISE from complaining that we don't use input ports.
+ */
+
+ reg [31: 0] reg_dummy_first;
+ reg [31: 0] reg_dummy_second;
+ reg [31: 0] reg_dummy_third;
+
+ always @(posedge sys_clk)
+ //
+ if (sys_rst) begin
+ reg_dummy_first <= {8{4'hA}};
+ reg_dummy_second <= {8{4'hB}};
+ reg_dummy_third <= {8{4'hC}};
+ end else if (sys_ena) begin
+ //
+ if (sys_eim_wr) begin
+ //
+ // WRITE handler
+ //
+ case (sys_eim_addr)
+ 14'd0: reg_dummy_first <= sys_write_data;
+ 14'd1: reg_dummy_second <= sys_write_data;
+ 14'd2: reg_dummy_third <= sys_write_data;
+ endcase
+ //
+ end
+ //
+ if (sys_eim_rd) begin
+ //
+ // READ handler
+ //
+ case (sys_eim_addr)
+ 14'd0: tmp_read_data <= reg_dummy_first;
+ 14'd1: tmp_read_data <= reg_dummy_second;
+ 14'd2: tmp_read_data <= reg_dummy_third;
+ //
+ default:
+ tmp_read_data <= {32{1'b0}}; // read non-existent locations as zeroes
+ endcase
+ //
+ end
+ //
+ end
+
+endmodule
+
+//======================================================================
+// EOF rng_selector.v
+//======================================================================
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