IORR_BASE0 76 drivers/char/agp/nvidia-agp.c rdmsr(IORR_BASE0 + 2 * iorr_addr, base_lo, base_hi); IORR_BASE0 95 drivers/char/agp/nvidia-agp.c wrmsr(IORR_BASE0 + 2 * iorr_addr, base_lo, base_hi);