feat: implement privileged mode support

sim/scripts/run_opensbi.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+set -u
+
+TESTBENCH="../verilator/obj_dir/VCore"
+OPENSBI_BIN="${OPENSBI_BIN:-../../opensbi/build/platform/generic/firmware/fw_payload.elf}"
+TIMEOUT_SECONDS="${TIMEOUT_SECONDS:-10}"
+
+if [ ! -x "$TESTBENCH" ]; then
+    echo "Error: Testbench not found. Run 'make -C sim/verilator compile' first."
+    exit 1
+fi
+
+if [ ! -f "$OPENSBI_BIN" ]; then
+    echo "Error: OpenSBI payload not found: $OPENSBI_BIN"
+    echo "Set OPENSBI_BIN to a firmware ELF path."
+    exit 2
+fi
+
+echo "Running OpenSBI payload: $OPENSBI_BIN"
+timeout "${TIMEOUT_SECONDS}s" "$TESTBENCH" "$OPENSBI_BIN"
+exitcode=$?
+
+if [ "$exitcode" -eq 124 ]; then
+    echo "OpenSBI run timed out"
+    exit 124
+fi
+
+exit "$exitcode"

sim/scripts/run_privileged_tests.sh

@@ -0,0 +1,75 @@
+#!/bin/bash
+set -u
+
+TESTBENCH="../verilator/obj_dir/VCore"
+TESTS_DIR="../../riscv-tests/isa"
+RESULTS_DIR="../results"
+RESULTS_FILE="$RESULTS_DIR/privileged_test_results.txt"
+TIMEOUT_SECONDS="${TIMEOUT_SECONDS:-5}"
+
+mkdir -p "$RESULTS_DIR"
+
+if [ ! -x "$TESTBENCH" ]; then
+    echo "Error: Testbench not found. Run 'make -C sim/verilator compile' first."
+    exit 1
+fi
+
+echo "Running privileged RISC-V tests..." > "$RESULTS_FILE"
+echo "=================================" >> "$RESULTS_FILE"
+
+PASS=0
+FAIL=0
+TIMEOUT=0
+
+shopt -s nullglob
+tests=(
+    "$TESTS_DIR"/rv64mi-p-*
+    "$TESTS_DIR"/rv64si-p-*
+    "$TESTS_DIR"/rv64ui-p-fence_i
+)
+
+for test in "${tests[@]}"; do
+    [[ "$test" == *.dump ]] && continue
+    [ ! -f "$test" ] && continue
+
+    testname=$(basename "$test")
+    printf "Running %s... " "$testname"
+
+    output=$(timeout "${TIMEOUT_SECONDS}s" "$TESTBENCH" "$test" 2>&1)
+    exitcode=$?
+
+    if [ "$exitcode" -eq 0 ]; then
+        echo "PASS"
+        echo "$testname: exit=0 PASS" >> "$RESULTS_FILE"
+        PASS=$((PASS + 1))
+    elif [ "$exitcode" -eq 124 ]; then
+        echo "TIMEOUT"
+        echo "$testname: exit=124 TIMEOUT" >> "$RESULTS_FILE"
+        TIMEOUT=$((TIMEOUT + 1))
+    else
+        echo "FAIL (exit code $exitcode)"
+        echo "$testname: exit=$exitcode FAIL" >> "$RESULTS_FILE"
+        printf '%s\n' "$output" >> "$RESULTS_FILE"
+        FAIL=$((FAIL + 1))
+    fi
+done
+
+TOTAL=$((PASS + FAIL + TIMEOUT))
+{
+    echo ""
+    echo "================================="
+    echo "Summary:"
+    echo "  PASS:    $PASS"
+    echo "  FAIL:    $FAIL"
+    echo "  TIMEOUT: $TIMEOUT"
+    echo "  TOTAL:   $TOTAL"
+} >> "$RESULTS_FILE"
+
+echo ""
+echo "Summary:"
+echo "  PASS:    $PASS"
+echo "  FAIL:    $FAIL"
+echo "  TIMEOUT: $TIMEOUT"
+echo "  TOTAL:   $TOTAL"
+echo ""
+echo "Results saved to $RESULTS_FILE"

sim/scripts/run_tests.sh

@@ -2,7 +2,7 @@
 
 TESTBENCH="../verilator/obj_dir/VCore"
 TESTS_DIR="../../riscv-tests/isa"
-RESULTS_FILE="test_results.txt"
+RESULTS_FILE="../results/test_results.txt"
 
 if [ ! -x "$TESTBENCH" ]; then
     echo "Error: Testbench not found. Run 'make compile' first."