chore(scripts): add aarch64/riscv64 QEMU run scripts

scripts/run-qemu-aarch64.sh

@@ -0,0 +1,50 @@
+#!/usr/bin/env bash
+# Copyright 2026 ONCRIX Contributors
+# SPDX-License-Identifier: Apache-2.0
+#
+# Run the ONCRIX kernel in QEMU (aarch64, `virt` machine).
+# Usage: ./scripts/run-qemu-aarch64.sh [--release]
+#
+# The kernel targets the GICv3 interrupt controller, so `gic-version=3`
+# is required (the `virt` machine defaults to GICv2, which has no
+# redistributor and faults `init_gic`). Serial (PL011 @ 0x0900_0000) is
+# routed to stdout. Expected output:
+#   [ONCRIX/aarch64] Kernel booting...
+#   [ONCRIX/aarch64] PL011 UART initialized (115200 8N1)
+#   [ONCRIX/aarch64] Heap initialized (16 MiB)
+#   [ONCRIX/aarch64] GICv3 initialized
+#   [ONCRIX/aarch64] Generic timer armed (10 ms)
+#   [ONCRIX/aarch64] All early initialization complete.
+#   [ONCRIX/aarch64] Entering halt loop.
+
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+PROJECT_DIR="$(dirname "$SCRIPT_DIR")"
+TARGET="aarch64-unknown-none"
+
+PROFILE="debug"
+if [[ "${1:-}" == "--release" ]]; then
+    PROFILE="release"
+    shift
+    cargo build -p oncrix-kernel --bin oncrix-kernel --target "$TARGET" --release
+else
+    cargo build -p oncrix-kernel --bin oncrix-kernel --target "$TARGET"
+fi
+
+KERNEL="$PROJECT_DIR/target/$TARGET/$PROFILE/oncrix-kernel"
+
+if [[ ! -f "$KERNEL" ]]; then
+    echo "Error: kernel binary not found at $KERNEL"
+    exit 1
+fi
+
+exec qemu-system-aarch64 \
+    -M virt,gic-version=3 \
+    -cpu cortex-a72 \
+    -m 512M \
+    -nographic \
+    -monitor none \
+    -no-reboot \
+    -kernel "$KERNEL" \
+    "$@"

scripts/run-qemu-riscv64.sh

@@ -0,0 +1,45 @@
+#!/usr/bin/env bash
+# Copyright 2026 ONCRIX Contributors
+# SPDX-License-Identifier: Apache-2.0
+#
+# Run the ONCRIX kernel in QEMU (riscv64, `virt` machine).
+# Usage: ./scripts/run-qemu-riscv64.sh [--release]
+#
+# The kernel uses the NS16550 UART (@ 0x1000_0000) and PLIC (@ 0x0C00_0000)
+# that the `virt` machine provides. `-bios default` boots via OpenSBI in
+# M-mode, which then enters the kernel in S-mode. Serial is on stdout.
+#
+# Requires qemu-system-riscv64 (part of the `qemu-system-misc` package on
+# Debian/Ubuntu, `qemu` on Arch).
+
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+PROJECT_DIR="$(dirname "$SCRIPT_DIR")"
+TARGET="riscv64gc-unknown-none-elf"
+
+PROFILE="debug"
+if [[ "${1:-}" == "--release" ]]; then
+    PROFILE="release"
+    shift
+    cargo build -p oncrix-kernel --bin oncrix-kernel --target "$TARGET" --release
+else
+    cargo build -p oncrix-kernel --bin oncrix-kernel --target "$TARGET"
+fi
+
+KERNEL="$PROJECT_DIR/target/$TARGET/$PROFILE/oncrix-kernel"
+
+if [[ ! -f "$KERNEL" ]]; then
+    echo "Error: kernel binary not found at $KERNEL"
+    exit 1
+fi
+
+exec qemu-system-riscv64 \
+    -M virt \
+    -m 512M \
+    -nographic \
+    -monitor none \
+    -no-reboot \
+    -bios default \
+    -kernel "$KERNEL" \
+    "$@"