/** RAM disk initialization routine
*
* The information about the RAM disk is provided as sysinfo
* values to the uspace tasks.
*
*/
void init_rd(void *data, size_t size)
{
uintptr_t base = (uintptr_t) data;
ASSERT((base % FRAME_SIZE) == 0);
rd_parea.pbase = base;
rd_parea.frames = SIZE2FRAMES(size);
rd_parea.unpriv = false;
rd_parea.mapped = false;
ddi_parea_register(&rd_parea);
sysinfo_set_item_val("rd", NULL, true);
sysinfo_set_item_val("rd.size", NULL, size);
sysinfo_set_item_val("rd.address.physical", NULL, (sysarg_t) base);
printf("RAM disk at %p (size %zu bytes)\n", (void *) base, size);
}
/** Initialize ns16550.
*
* @param dev Addrress of the beginning of the device in I/O space.
* @param inr Interrupt number.
* @param cir Clear interrupt function.
* @param cir_arg First argument to cir.
* @param output Where to store pointer to the output device
* or NULL if the caller is not interested in
* writing to the serial port.
*
* @return Keyboard instance or NULL on failure.
*
*/
ns16550_instance_t *ns16550_init(ns16550_t *dev, inr_t inr, cir_t cir,
void *cir_arg, outdev_t **output)
{
ns16550_instance_t *instance
= malloc(sizeof(ns16550_instance_t), FRAME_ATOMIC);
if (instance) {
instance->ns16550 = dev;
instance->input = NULL;
instance->output = NULL;
if (output) {
instance->output = malloc(sizeof(outdev_t),
FRAME_ATOMIC);
if (!instance->output) {
free(instance);
return NULL;
}
outdev_initialize("ns16550", instance->output,
&ns16550_ops);
instance->output->data = instance;
*output = instance->output;
}
irq_initialize(&instance->irq);
instance->irq.devno = device_assign_devno();
instance->irq.inr = inr;
instance->irq.claim = ns16550_claim;
instance->irq.handler = ns16550_irq_handler;
instance->irq.instance = instance;
instance->irq.cir = cir;
instance->irq.cir_arg = cir_arg;
instance->parea.pbase = (uintptr_t) dev;
instance->parea.frames = 1;
instance->parea.unpriv = false;
instance->parea.mapped = false;
ddi_parea_register(&instance->parea);
}
return instance;
}
