acpi_hw_write
acpi_status acpi_hw_write(u64 value, struct acpi_generic_address *reg);
acpi_hw_write(pm1a_control, &acpi_gbl_FADT.xpm1a_control_block);
acpi_hw_write(pm1b_control,
acpi_hw_write(value, &acpi_gbl_FADT.xpm2_control_block);
status = acpi_hw_write(value, &acpi_gbl_FADT.xpm_timer_block);
status = acpi_hw_write(value, register_a);
status = acpi_hw_write(value, register_b);
status = acpi_hw_write(value, reg);
status = acpi_hw_write(acpi_gbl_FADT.reset_value, reset_reg);