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Rev 1196 Rev 1474
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};
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};
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static void i8042_interrupt(int n, istate_t *istate);
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static void i8042_interrupt(int n, istate_t *istate);
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static void i8042_wait(void);
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static void i8042_wait(void);
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/** Initialize i8042. */
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static iroutine oldvector;
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/** Initialize keyboard and service interrupts using kernel routine */
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void i8042_init(void)
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void i8042_grab(void)
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{
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{
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    int i;
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    exc_register(VECTOR_KBD, "i8042_interrupt", (iroutine) i8042_interrupt);
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    oldvector = exc_register(VECTOR_KBD, "i8042_interrupt", (iroutine) i8042_interrupt);
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    i8042_wait();
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    i8042_wait();
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    i8042_command_write(i8042_SET_COMMAND);
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    i8042_command_write(i8042_SET_COMMAND);
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    i8042_wait();
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    i8042_wait();
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    i8042_data_write(i8042_COMMAND);
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    i8042_data_write(i8042_COMMAND);
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    i8042_wait();
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    i8042_wait();
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}
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/** Resume the former interrupt vector */
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void i8042_release(void)
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{
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    if (oldvector)
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        exc_register(VECTOR_KBD, "user_interrupt", oldvector);
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}
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/** Initialize i8042. */
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void i8042_init(void)
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{
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    int i;
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    i8042_grab();
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        /* Prevent user from accidentaly releasing calling i8042_resume
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     * and disabling keyboard
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     */
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    oldvector = NULL;
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    trap_virtual_enable_irqs(1<<IRQ_KBD);
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    trap_virtual_enable_irqs(1<<IRQ_KBD);
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    chardev_initialize("i8042_kbd", &kbrd, &ops);
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    chardev_initialize("i8042_kbd", &kbrd, &ops);
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    stdin = &kbrd;
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    stdin = &kbrd;
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