Function k6_mrset

freebsd/i386/i386/k6_mem.c:131–176

}

static int
k6_mrset(struct mem_range_softc *sc, struct mem_range_desc *desc, int *arg)
{
	u_int64_t reg;
	u_int32_t mtrr;
	int error, d;

	switch (*arg) {
	case MEMRANGE_SET_UPDATE:
		error = k6_mrmake(desc, &mtrr);
		if (error)
			return (error);
		for (d = 0; d < sc->mr_ndesc; d++) {
			if (!sc->mr_desc[d].mr_len) {
				sc->mr_desc[d] = *desc;
				goto out;
			}
			if (sc->mr_desc[d].mr_base == desc->mr_base &&
			    sc->mr_desc[d].mr_len == desc->mr_len)
				return (EEXIST);
		}
		return (ENOSPC);
	case MEMRANGE_SET_REMOVE:
		mtrr = 0;
		for (d = 0; d < sc->mr_ndesc; d++)
			if (sc->mr_desc[d].mr_base == desc->mr_base &&
			    sc->mr_desc[d].mr_len == desc->mr_len) {
				bzero(&sc->mr_desc[d], sizeof(sc->mr_desc[d]));
				goto out;
			}
		return (ENOENT);
	default:
		return (EOPNOTSUPP);
	}
out:	
	disable_intr();
	wbinvd();
	reg = rdmsr(UWCCR);
	reg &= ~(0xffffffff << (32 * d));
	reg |= mtrr << (32 * d);
	wrmsr(UWCCR, reg);
	wbinvd();
	enable_intr();

	return (0);
}

static void
k6_mem_drvinit(void *unused)