// QEMU virt does not expose a BCM2711-style system timer; periodic // ticks come from the ARM generic timer (driven by // src/generic_timer.flash / arch/aarch64/generic_timer.S, board-independent). // Pi's `timer_init` and `handle_sys_timer_1` exports are referenced // by Pi's IRQ wiring; the virt build does not invoke them, but // stubbing both keeps the symbol surface consistent so any // inadvertent reference at link time resolves to a no-op. export fn timer_init() void {} export fn handle_sys_timer_1() void {}