Differential D21685 Diff 62400 head/sys/arm64/arm64/pmap.c

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head/sys/arm64/arm64/pmap.c

Show First 20 Lines • Show All 5,804 Lines • ▼ Show 20 Lines	if (ptep != NULL &&
rv = KERN_SUCCESS;		rv = KERN_SUCCESS;
}		}
PMAP_UNLOCK(pmap);		PMAP_UNLOCK(pmap);
break;		break;
case ISS_DATA_DFSC_TF_L0:		case ISS_DATA_DFSC_TF_L0:
case ISS_DATA_DFSC_TF_L1:		case ISS_DATA_DFSC_TF_L1:
case ISS_DATA_DFSC_TF_L2:		case ISS_DATA_DFSC_TF_L2:
case ISS_DATA_DFSC_TF_L3:		case ISS_DATA_DFSC_TF_L3:
		/*
		* Retry the translation. A break-before-make sequence can
		* produce a transient fault.
		*/
		if (pmap == kernel_pmap) {
		/*
		* The translation fault may have occurred within a
		* critical section. Therefore, we must check the
		* address without acquiring the kernel pmap's lock.
		*/
		if (pmap_kextract(far) != 0)
		rv = KERN_SUCCESS;
		} else {
PMAP_LOCK(pmap);		PMAP_LOCK(pmap);
/* Ask the MMU to check the address */		/* Ask the MMU to check the address. */
intr = intr_disable();		intr = intr_disable();
if (pmap == kernel_pmap)
par = arm64_address_translate_s1e1r(far);
else
par = arm64_address_translate_s1e0r(far);		par = arm64_address_translate_s1e0r(far);
intr_restore(intr);		intr_restore(intr);
PMAP_UNLOCK(pmap);		PMAP_UNLOCK(pmap);

/*		/*
* If the translation was successful the address was invalid		* If the translation was successful, then we can
* due to a break-before-make sequence. We can unlock and
* return success to the trap handler.		* return success to the trap handler.
*/		*/
if (PAR_SUCCESS(par))		if (PAR_SUCCESS(par))
rv = KERN_SUCCESS;		rv = KERN_SUCCESS;
		}
break;		break;
}		}

return (rv);		return (rv);
}		}

/*		/*
* Increase the starting virtual address of the given mapping if a		* Increase the starting virtual address of the given mapping if a
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