void timer_install(u32int freq)
{
interrupt_install_handler(IRQ0, timer_handler, "PIT");
u32int d = 11913180 / freq;
outportb(0x43, 0x36);
u8int l = (u8int)(d & 0xFF);
u8int h = (u8int)((d >> 8) & 0xFF);
outportb(0x40, l);
outportb(0x40, h);
}
void keyboard_enable()
{
int i = 0;
asm_disable_interrupt();
#ifdef _USE_GAZ
/* This is for debugging purposes. */
set_vector(keyb_ISR, M_VEC+1, D_PRESENT + D_INT + D_DPL3, KERNEL_CS);
enable_irq(1);
#else /* Default - use OX driver logic. */
printk("initializing Keyboard driver version 1.0\n");
interrupt_install_handler(1,
IRQ_EXCL,
keyboard_handler,
keyboard_info);
printk("done initializing Keyboard driver version 1.0\n");
/* irq_enable(1); */
enable_irq(1);
#endif
led_status = 0; /* All leds off */
setleds();
}
general_error irq_init(void)
{
/* Send both PICs initialization word ICW1. */
outb(IRQ_MASTER | IRQ_CMD, IRQ_ICW1 | IRQ_ICW4_COMING);
outb(IRQ_SLAVE | IRQ_CMD, IRQ_ICW1 | IRQ_ICW4_COMING);
/* Send both PICs remapping information. */
outb(IRQ_MASTER | IRQ_DATA, IRQ_REMAP_MASK & 0x20);
outb(IRQ_SLAVE | IRQ_DATA, IRQ_REMAP_MASK & 0x2F);
/* Tell both PICs where the slave is mapped. */
outb(IRQ_MASTER | IRQ_DATA, IRQ_SLAVE_IS2);
outb(IRQ_SLAVE | IRQ_DATA, IRQ_SLAVEID_2);
/* Send both PICs some more configuration data. */
outb(IRQ_MASTER | IRQ_DATA, (IRQ_NONBUFFERED |
IRQ_NORMAL_EOI |
IRQ_8086_MODE));
outb(IRQ_SLAVE | IRQ_DATA, (IRQ_NONBUFFERED |
IRQ_NORMAL_EOI |
IRQ_8086_MODE));
/* Turn on only the keyboard IRQ. */
outb(IRQ_MASTER | IRQ_DATA, ~IRQ_MASTER_IRQ(IRQ_KEYBOARD));
outb(IRQ_SLAVE | IRQ_DATA, ~IRQ_SLAVE_IRQ(IRQ_KEYBOARD));
/* Install handlers for all IRQs. In principle, whenever an IRQ
* is turned on by a driver, it should also install a handler,
* but who knows, maybe it won't. This way, we are not stuck with
* the very generic unhandled-interrupt routine, but something
* slightly more infomative. */
interrupt_install_handler(0x20, &irq0_handler);
interrupt_install_handler(0x21, &irq1_handler);
interrupt_install_handler(0x22, &irq2_handler);
interrupt_install_handler(0x23, &irq3_handler);
interrupt_install_handler(0x24, &irq4_handler);
interrupt_install_handler(0x25, &irq5_handler);
interrupt_install_handler(0x26, &irq6_handler);
interrupt_install_handler(0x27, &irq7_handler);
interrupt_install_handler(0x28, &irq8_handler);
interrupt_install_handler(0x29, &irq9_handler);
interrupt_install_handler(0x2a, &irq10_handler);
interrupt_install_handler(0x2b, &irq11_handler);
interrupt_install_handler(0x2c, &irq12_handler);
interrupt_install_handler(0x2d, &irq13_handler);
interrupt_install_handler(0x2e, &irq14_handler);
interrupt_install_handler(0x2f, &irq15_handler);
/* Now install the individual handlers. */
unsigned int i;
for (i = 0; i < 16; i++)
install_irq_handler(i, &default_irq_handler);
return GENERAL_OK;
}
