Added rudimentary GPIO test according to testplans in chapter 15

pipelined/testbench/testbench.sv

@@ -117,6 +117,7 @@ logic [3:0] dummy;
         "wally32i":                       tests = wally32i; 
         "wally32e":                       tests = wally32e; 
         "wally32priv":                    tests = wally32priv;
+        "wally32periph":                   tests = wally32periph;
         "embench":                        tests = embench;
       endcase
     end

pipelined/testbench/tests.vh

@@ -1581,6 +1581,7 @@ string wally32i[] = '{
  };
 
  string wally32periph[] = '{
-    `WALLYTEST
+    `WALLYTEST,
+    "rv32i_m/privilege/WALLY-gpio-01"
  };
 

tests/wally-riscv-arch-test/riscv-test-suite/rv32i_m/privilege/Makefrag

@@ -53,8 +53,8 @@ target_tests_nosim = \
     WALLY-status-fp-enabled-01 \
     WALLY-status-sie-01 \
     WALLY-status-tw-01 \
+    WALLY-gpio-01 \
 
-# unclear why wfi, status-fp-enabled, status-sie, and status-tw fail
 
 rv32i_tests = $(addsuffix .elf, $(rv32i_sc_tests))
 

tests/wally-riscv-arch-test/riscv-test-suite/rv32i_m/privilege/references/WALLY-gpio-01.reference_output

@@ -0,0 +1,7 @@
+00000000
+00000000
+A5A5A5A5
+5A5AFFFF
+00000000
+5A5A0000
+A55A0000

tests/wally-riscv-arch-test/riscv-test-suite/rv32i_m/privilege/src/WALLY-gpio-01.S

@@ -0,0 +1,99 @@
+///////////////////////////////////////////
+//
+// WALLY-gpio
+//
+// Author: David_Harris@hmc.edu and Nicholas Lucio <nlucio@hmc.edu>
+//
+// Created 2022-06-16
+//
+// Copyright (C) 2021 Harvey Mudd College & Oklahoma State University
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation
+// files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy,
+// modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software
+// is furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+// BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT
+// OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+///////////////////////////////////////////
+
+#include "WALLY-TEST-LIB-32.h" 
+
+INIT_TESTS
+
+TRAP_HANDLER m
+
+j run_test_loop // begin test loop/table tests instead of executing inline code.
+
+INIT_TEST_TABLE
+
+END_TESTS
+
+TEST_STACK_AND_DATA
+
+.align 2
+test_cases:
+# ---------------------------------------------------------------------------------------------
+# Test Contents
+#
+#   Here is where the actual tests are held, or rather, what the actual tests do.
+#   each entry consists of 3 values that will be read in as follows:
+#   
+#   '.4byte [x28 Value], [x29 Value], [x30 value]'
+#                     or
+#   '.4byte [address], [value], [test type]'
+#
+#   The encoding for x30 test type values can be found in the test handler in the framework file
+# 
+# ---------------------------------------------------------------------------------------------
+
+.equ GPIO, 0x10060000
+.equ input_val, (GPIO+0x00)
+.equ input_en, (GPIO+0x04)
+.equ output_en, (GPIO+0x08)
+.equ output_val, (GPIO+0x0C)
+.equ rise_ie, (GPIO+0x18)
+.equ rise_ip, (GPIO+0x1C)
+.equ fall_ie, (GPIO+0x20)
+.equ fall_ip, (GPIO+0x24)
+.equ high_ie, (GPIO+0x28)
+.equ high_ip, (GPIO+0x2C)
+.equ low_ie, (GPIO+0x30)
+.equ low_ip, (GPIO+0x34)
+.equ iof_en, (GPIO+0x38)
+.equ iof_sel, (GPIO+0x3C)
+.equ out_xor, (GPIO+0x40)
+
+# =========== Verify all registers reset to zero ===========
+
+.4byte input_val, 0x00000000, read32_test  # input_val reset to zero
+.4byte input_en, 0x00000000, read32_test  # input_en reset to zero
+
+# =========== Test output and input pins ===========
+
+.4byte output_en, 0xFFFFFFFF, write32_test      # enable all output pins
+.4byte output_val, 0xA5A5A5A5, write32_test     # write alternating pattern to output pins
+.4byte input_en, 0xFFFFFFFF, write32_test       # enable all input pins
+.4byte input_val, 0xA5A5A5A5, read32_test       # read pattern from output pins
+.4byte output_val, 0x5A5AFFFF, write32_test     # write different pattern to output pins
+.4byte input_val, 0x5A5AFFFF, read32_test       # read different pattern from output pins
+
+# =========== Test input enables ===========
+.4byte input_en, 0x00000000, write32_test       # disable all input pins
+.4byte input_val, 0x00000000, read32_test       # read 0 since input pins are disabled
+.4byte input_en, 0xFFFF0000, write32_test       # enable a few input pins
+.4byte input_val, 0x5A5A0000, read32_test      # read part of pattern set above.
+
+# =========== Test output enables(?) ===========
+
+.4byte output_en, 0xFFFFFFFF, write32_test      # undo changes made to output enable
+
+# =========== Test XOR functionality ===========
+.4byte out_xor, 0xFF00FF00, write32_test        # invert certain pin values
+.4byte input_val, 0xA55A0000, read32_test           # read inverted pins and verify input enable is working
+
+.4byte 0x0, 0x0, terminate_test # terminate tests