Function xlp_simplebus_alloc_resource

freebsd/mips/nlm/xlp_simplebus.c:166–267

}

static struct resource *
xlp_simplebus_alloc_resource(device_t bus, device_t child, int type, int *rid,
    rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
{
	struct rman			*rm;
	struct resource			*rv;
	struct resource_list_entry	*rle;
	struct simplebus_softc		*sc;
	struct simplebus_devinfo	*di;
	bus_space_tag_t			bustag;
	int j, isdefault, passthrough, needsactivate;

	passthrough = (device_get_parent(child) != bus);
	needsactivate = flags & RF_ACTIVE;
	sc = device_get_softc(bus);
        di = device_get_ivars(child);
	rle = NULL;
	bustag = NULL;

	if (!passthrough) {
		isdefault = RMAN_IS_DEFAULT_RANGE(start, end);
		if (isdefault) {
			rle = resource_list_find(&di->rl, type, *rid);
			if (rle == NULL)
				return (NULL);
			if (rle->res != NULL)
				panic("%s: resource entry is busy", __func__);
			start = rle->start;
			count = ulmax(count, rle->count);
			end = ulmax(rle->end, start + count - 1);
		}
		if (type == SYS_RES_MEMORY) {
			/* Remap through ranges property */
			for (j = 0; j < sc->nranges; j++) {
				if (start >= sc->ranges[j].bus && end <
				    sc->ranges[j].bus + sc->ranges[j].size) {
					start -= sc->ranges[j].bus;
					start += sc->ranges[j].host;
					end -= sc->ranges[j].bus;
					end += sc->ranges[j].host;
					break;
				}
			}
			if (j == sc->nranges && sc->nranges != 0) {
				if (bootverbose)
					device_printf(bus, "Could not map resource "
					    "%#jx-%#jx\n", start, end);
				return (NULL);
			}
		}
	}
	switch (type) {
	case SYS_RES_IRQ:
		rm = &irq_rman;
		break;
	case SYS_RES_IOPORT:
		rm = &port_rman;
		bustag = rmi_bus_space;