/* We assign these to dummy to deal with an sdcc bug (should be fixed in next
SDCC) */
void platform_interrupt(void)
{
uint8_t dummy;
uint8_t irq = *((volatile uint8_t *)0x37E0);
tty_interrupt();
kbd_interrupt();
if (irq & 0x40)
dummy = sdcc_bug_2753(*((volatile uint8_t *)0x37EC));
if (irq & 0x80) { /* FIXME??? */
timer_interrupt();
dummy = sdcc_bug_2753(*((volatile uint8_t *)0x37E0)); /* Ack the timer */
}
}
static void kbd_irq_thread_proc(void* arg)
{
kbd_irq_handler = irq_handler_register_thread(1, IRQ_TYPE_EDGE_PRE_ACK);
if (!kbd_irq_handler)
fatal("couldn't register IRQ");
KbdState* kbd_state = kbd_create();
if (!kbd_state)
fatal("out of memory");
bool kdebug_hotkey_state = false;
for (;;) {
uint c = irq_handler_wait_for_irq(kbd_irq_handler);
if (!c)
fatal("huh");
kbd_interrupt(kbd_state);
KbdKeyEvent event;
if (kbd_read_event(kbd_state, &event)) {
//keyboard event, handle it
//virtual console switching
if (event.key_code >= KEYCODE_F1
&& event.key_code <= KEYCODE_F0 + 11)
{
VirtualConsole* vc =
virtual_console_find_by_number(event.key_code - KEYCODE_F0);
if (vc)
virtual_console_switch_to(vc);
continue;
}
if (event.key_code == KEYCODE_PAGEDOWN) {
if (event.down)
virtual_console_current_page_down();
continue;
}
if (event.key_code == KEYCODE_PAGEUP) {
if (event.down)
virtual_console_current_page_up();
continue;
}
if (event.key_code == KEYCODE_KERNELDEBUGGER) {
//special key: drop into kernel debugger (always...)
if (event.down && !kdebug_hotkey_state) {
kdebug_hotkey_state = true;
kdebug_enter_by_hotkey();
} else if (!event.down) {
kdebug_hotkey_state = false;
}
}
//insert into buffer
spinlock_lock(&buffer_lock);
if (buffer_size < KEY_BUFFER_COUNT) {
key_buffer[(buffer_cur+buffer_size) % KEY_BUFFER_COUNT]
= event;
buffer_size++;
} else {
printf("Kbd: Kernel keyboard buffer full!\n");
}
spinlock_unlock(&buffer_lock);
//check workqueue for new waiters
for (;;) {
WorkItem* cur = workqueue_nowait(kbd_queue);
if (!cur)
break;
KbdKeyMessage* curmsg = cur->data;
list_insert_tail(&g_kbd_waiters, curmsg);
}
//find a thread that is on the current VC (if there are several,
//it's undefined which one will get the key)
for (KbdKeyMessage* cur = list_head(&g_kbd_waiters); cur;
cur = list_next(&g_kbd_waiters, cur))
{
if (virtual_console_get_thread_vc(cur->sender)
== virtual_console_get_current())
{
list_remove(&g_kbd_waiters, cur);
//wakeup in order to make him read the buffer
thread_wakeup_safe(cur->sender, &wait_for_kbd);
break;
}
}
} //if event
} //main loop
}
void platform_interrupt(void)
{
kbd_interrupt();
timer_interrupt();
}