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Implement pmap_align_superpage on arm64 based on the amd64 implementation.

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This will be needed when superpage support is added.

Obtained from:	ABT Systems Ltd
MFC after:	1 month
Sponsored by:	The FreeBSD Foundation
This commit is contained in:
Andrew Turner 2016-08-10 10:13:34 +00:00
parent 127d6d1a64
commit 4088f71f9b
1 changed files with 14 additions and 0 deletions
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14
sys/arm64/arm64/pmap.c
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@ -3490,6 +3490,20 @@ void
pmap_align_superpage(vm_object_t object, vm_ooffset_t offset,
vm_offset_t *addr, vm_size_t size)
{
vm_offset_t superpage_offset;
if (size < L2_SIZE)
return;
if (object != NULL && (object->flags & OBJ_COLORED) != 0)
offset += ptoa(object->pg_color);
superpage_offset = offset & L2_OFFSET;
if (size - ((L2_SIZE - superpage_offset) & L2_OFFSET) < L2_SIZE ||
(*addr & L2_OFFSET) == superpage_offset)
return;
if ((*addr & L2_OFFSET) < superpage_offset)
*addr = (*addr & ~L2_OFFSET) + superpage_offset;
else
*addr = ((*addr + L2_OFFSET) & ~L2_OFFSET) + superpage_offset;
}
/**