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MFC r204296:

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Provide an implementation of pmap_dev_direct_mapped() on OEA64. This is
required in order to be able to mmap the running kernel, which is turn
required to avoid fstat returning gibberish.
This commit is contained in:
Nathan Whitehorn 2010-03-20 15:23:06 +00:00
parent 59908d2f72
commit 1f70273a79
1 changed files with 16 additions and 1 deletions
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17
sys/powerpc/aim/mmu_oea64.c
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@ -2408,7 +2408,22 @@ moea64_clear_bit(vm_page_t m, u_int64_t ptebit, u_int64_t *origbit)
boolean_t
moea64_dev_direct_mapped(mmu_t mmu, vm_offset_t pa, vm_size_t size)
{
return (EFAULT);
struct pvo_entry *pvo;
vm_offset_t ppa;
int error = 0;
PMAP_LOCK(kernel_pmap);
for (ppa = pa & ~ADDR_POFF; ppa < pa + size; ppa += PAGE_SIZE) {
pvo = moea64_pvo_find_va(kernel_pmap, ppa, NULL);
if (pvo == NULL ||
(pvo->pvo_pte.lpte.pte_lo & LPTE_RPGN) != ppa) {
error = EFAULT;
break;
}
}
PMAP_UNLOCK(kernel_pmap);
return (error);
}
boolean_t