MIPS_MAARX_ADDR_SHIFT
upper >>= MIPS_MAARX_ADDR_SHIFT;
lower >>= MIPS_MAARX_ADDR_SHIFT;
upper |= (phys_addr_t)readx_c0_maar() << MIPS_MAARX_ADDR_SHIFT;
lower |= (phys_addr_t)readx_c0_maar() << MIPS_MAARX_ADDR_SHIFT;