| 80,19 → 80,28 |
|---|
| /** Initialize keyboard and service interrupts using kernel routine */ |
| void ns16550_grab(void) |
| { |
| ipl_t ipl = interrupts_disable(); |
| |
| ns16550_ier_write(&ns16550, IER_ERBFI); /* enable receiver interrupt */ |
| |
| while (ns16550_lsr_read(&ns16550) & LSR_DATA_READY) |
| (void) ns16550_rbr_read(&ns16550); |
| |
| spinlock_lock(&ns16550_irq.lock); |
| ns16550_irq.notif_cfg.notify = false; |
| spinlock_unlock(&ns16550_irq.lock); |
| interrupts_restore(ipl); |
| } |
| |
| /** Resume the former interrupt vector */ |
| void ns16550_release(void) |
| { |
| ipl_t ipl = interrupts_disable(); |
| spinlock_lock(&ns16550_irq.lock); |
| if (ns16550_irq.notif_cfg.answerbox) |
| ns16550_irq.notif_cfg.notify = true; |
| spinlock_unlock(&ns16550_irq.lock); |
| interrupts_restore(ipl); |
| } |
| |
| /** Initialize ns16550. |