Subversion Repositories HelenOS

Rev

Rev 1932 | Go to most recent revision | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 1932 Rev 1944
Line 78... Line 78...
78 
void ns16550_interrupt(void);
 78 
void ns16550_interrupt(void);
79 
 
 79 
 
80 
/** Initialize keyboard and service interrupts using kernel routine */
 80 
/** Initialize keyboard and service interrupts using kernel routine */
81 
void ns16550_grab(void)
 81 
void ns16550_grab(void)
82 
{
 82 
{
- 
 
 83 
    ipl_t ipl = interrupts_disable();
- 
 
 84 
 
83 
    ns16550_ier_write(&ns16550, IER_ERBFI);     /* enable receiver interrupt */
 85 
    ns16550_ier_write(&ns16550, IER_ERBFI);     /* enable receiver interrupt */
84 
   
 86 
   
85 
    while (ns16550_lsr_read(&ns16550) & LSR_DATA_READY)
 87 
    while (ns16550_lsr_read(&ns16550) & LSR_DATA_READY)
86 
        (void) ns16550_rbr_read(&ns16550);
 88 
        (void) ns16550_rbr_read(&ns16550);
87 
 
 89 
 
- 
 
 90 
    spinlock_lock(&ns16550_irq.lock);
88 
    ns16550_irq.notif_cfg.notify = false;
 91 
    ns16550_irq.notif_cfg.notify = false;
- 
 
 92 
    spinlock_unlock(&ns16550_irq.lock);
- 
 
 93 
    interrupts_restore(ipl);
89 
}
 94 
}
90 
 
 95 
 
91 
/** Resume the former interrupt vector */
 96 
/** Resume the former interrupt vector */
92 
void ns16550_release(void)
 97 
void ns16550_release(void)
93 
{
 98 
{
- 
 
 99 
    ipl_t ipl = interrupts_disable();
- 
 
 100 
    spinlock_lock(&ns16550_irq.lock);
94 
    if (ns16550_irq.notif_cfg.answerbox)
 101 
    if (ns16550_irq.notif_cfg.answerbox)
95 
        ns16550_irq.notif_cfg.notify = true;
 102 
        ns16550_irq.notif_cfg.notify = true;
- 
 
 103 
    spinlock_unlock(&ns16550_irq.lock);
- 
 
 104 
    interrupts_restore(ipl);
96 
}
 105 
}
97 
 
 106 
 
98 
/** Initialize ns16550.
 107 
/** Initialize ns16550.
99 
 *
 108 
 *
100 
 * @param devno Device number.
 109 
 * @param devno Device number.