Function obio_alloc_resource

freebsd/mips/malta/obio.c:114–157

}

static struct resource *
obio_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 resource *rv;
	struct rman *rm;
	bus_space_tag_t bt = 0;
	bus_space_handle_t bh = 0;
	struct obio_softc *sc = device_get_softc(bus);

	switch (type) {
	case SYS_RES_IRQ:
		rm = &sc->oba_irq_rman;
		break;
	case SYS_RES_MEMORY:
		return (NULL);
	case SYS_RES_IOPORT:
		rm = &sc->oba_rman;
		bt = sc->oba_st;
		bh = sc->oba_addr;
		start = bh;
		break;
	default:
		return (NULL);
	}

	rv = rman_reserve_resource(rm, start, end, count, flags, child);
	if (rv == NULL) 
		return (NULL);
	if (type == SYS_RES_IRQ)
		return (rv);
	rman_set_rid(rv, *rid);
	rman_set_bustag(rv, bt);
	rman_set_bushandle(rv, bh);

	if (0) {
		if (bus_activate_resource(child, type, *rid, rv)) {
			rman_release_resource(rv);
			return (NULL);
		}
	}
	return (rv);

}

static int
obio_activate_resource(device_t bus, device_t child, int type, int rid,