void
hwi_add_device(const char *bname, const char *cname, const char *dname, unsigned pnp) {
hwi_tag *tag;
unsigned bus;
unsigned class;
bus = hwi_find_item(HWI_NULL_OFF, bname, NULL);
if(bus == HWI_NULL_OFF) {
unsigned off = hwi_find_item(HWI_NULL_OFF, HWI_ITEM_ROOT_HW, NULL);
tag = hwi_alloc_item(HWI_TAG_INFO(bus), bname, off);
bus = hwi_tag2off(tag);
}
class = hwi_find_item(HWI_NULL_OFF, bname, cname, NULL);
if(class == HWI_NULL_OFF) {
tag = hwi_alloc_item(HWI_TAG_INFO(group), cname, bus);
class = hwi_tag2off(tag);
}
tag = hwi_alloc_item(HWI_TAG_INFO(device), dname, class);
tag->device.pnpid = pnp;
}
/*******************************************************************************
* hwibus_add
*
* adds the bus <bus_name> to the device (or bus) <parent_hwi_off>. We ignore
* the class specifier
*
* Returns: the hwi_off for the added bus or HWI_NULL_OFF on error
*
* Note that although we used the name 'bus' to be consistent with previous
* nomenclature, from a topology perscpective, we actually mean any interconnect
* to which a device is connected
*/
unsigned hwibus_add(const char *bus_name, unsigned parent_hwi_off)
{
unsigned hwi_off = HWI_NULL_OFF;
/* if no parent is provided for the bus, it will get added to HWI_ITEM_ROOT_HW */
if ((parent_hwi_off != HWI_NULL_OFF) ||
(parent_hwi_off = hwi_find_item(HWI_NULL_OFF, HWI_ITEM_ROOT_HW, NULL)) != HWI_NULL_OFF)
{
hwi_tag *tag = hwi_alloc_item(HWI_TAG_INFO(bus), bus_name, parent_hwi_off);
if (tag != NULL) hwi_off = hwi_tag2off(tag);
}
return hwi_off;
}
