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Set the caching mode for the usermode mapping of the HPET registers

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page to uncached.

Reviewed by:	rpaulo
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
This commit is contained in:
Konstantin Belousov 2014-10-25 21:01:50 +00:00
parent 1bc9ea1caa
commit 3f6732e8e0
1 changed files with 1 additions and 0 deletions
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1
sys/dev/acpica/acpi_hpet.c
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@ -356,6 +356,7 @@ hpet_mmap(struct cdev *cdev, vm_ooffset_t offset, vm_paddr_t *paddr,
if (!sc->mmap_allow_write && (nprot & PROT_WRITE))
return (EPERM);
*paddr = rman_get_start(sc->mem_res) + offset;
*memattr = VM_MEMATTR_UNCACHEABLE;
return (0);
}