add pmp_random test

.github/workflows/test-regression-cache-wayback-0.yml

@@ -13,7 +13,8 @@ jobs:
       matrix:
         bus: ["axi", "ahb"]
         test: ["hello_world", "hello_world_dccm", "cmark", "cmark_dccm", "cmark_iccm", "dhry", "ecc",
-               "csr_misa", "csr_access", "csr_mstatus", "csr_mseccfg", "modesw", "insns", "irq", "perf_counters", "pmp", "write_unaligned",
+               "csr_misa", "csr_access", "csr_mstatus", "csr_mseccfg", "modesw", "insns", "irq", "perf_counters",
+               "pmp", "pmp_random", "write_unaligned",
                "icache", "bitmanip"]
         coverage: ["branch", "toggle"] #TODO: add functional coverage
         priv: ["0", "1"]

.github/workflows/test-regression-cache-wayback-1.yml

@@ -13,7 +13,8 @@ jobs:
       matrix:
         bus: ["axi", "ahb"]
         test: ["hello_world", "hello_world_dccm", "cmark", "cmark_dccm", "cmark_iccm", "dhry", "ecc",
-               "csr_misa", "csr_access", "csr_mstatus", "csr_mseccfg", "modesw", "insns", "irq", "perf_counters", "pmp", "write_unaligned",
+               "csr_misa", "csr_access", "csr_mstatus", "csr_mseccfg", "modesw", "insns", "irq", "perf_counters",
+               "pmp", "pmp_random", "write_unaligned",
                "icache", "bitmanip"]
         coverage: ["branch", "toggle"] #TODO: add functional coverage
         priv: ["0", "1"]

testbench/tests/pmp_random/crt0.s

@@ -0,0 +1 @@
+../pmp/crt0.s

testbench/tests/pmp_random/fault.c

@@ -0,0 +1 @@
+../pmp/fault.c

testbench/tests/pmp_random/fault.h

@@ -0,0 +1 @@
+../pmp/fault.h

testbench/tests/pmp_random/generate_random.sh

@@ -0,0 +1,29 @@
+#!/usr/bin/env bash
+
+set -e
+
+outfile=random_data.h
+iterations=100
+
+printf '// This file was generated with generate_random.sh\n\n' > $outfile
+
+echo "#define RANDOM_ITERATIONS $iterations" >> $outfile
+echo 'const uint32_t rand_address [] = {' >> $outfile
+
+# generate random data in hex, fold each 8 hex digits, prepend '0x', append ',' 
+tr -dc 'A-F0-9' < /dev/urandom | dd bs=1 count=$((8 * $iterations)) 2>/dev/null | \
+     fold -w8 | \
+     sed 's/^/    0x/' | \
+     sed 's/$/,/' >> $outfile
+echo >> $outfile
+echo '};' >> $outfile
+
+echo 'const uint32_t rand_config [] = {' >> $outfile
+# generate random data in hex, fold each 8 hex digits, prepend '0x', append ',' 
+tr -dc 'A-F0-9' < /dev/urandom | dd bs=1 count=$((8 * $iterations)) 2>/dev/null | \
+     fold -w8 | \
+     sed 's/^/    0x/' | \
+     sed 's/$/,/' >> $outfile
+echo >> $outfile
+echo '};' >> $outfile
+