EMR
I915_WRITE(EMR, I915_READ(EMR) | eir);
I915_WRITE16(EMR, ~(I915_ERROR_PAGE_TABLE |
emr = I915_READ16(EMR);
I915_WRITE16(EMR, 0xffff);
I915_WRITE16(EMR, emr | *eir_stuck);
emr = I915_READ(EMR);
I915_WRITE(EMR, 0xffffffff);
I915_WRITE(EMR, emr | *eir_stuck);
I915_WRITE(EMR, ~(I915_ERROR_PAGE_TABLE |
I915_WRITE(EMR, error_mask);