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head/sys/amd64/amd64/pmap.c

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static void static void
_pmap_unwire_ptp(pmap_t pmap, vm_offset_t va, vm_page_t m, struct spglist *free) _pmap_unwire_ptp(pmap_t pmap, vm_offset_t va, vm_page_t m, struct spglist *free)
{ {
PMAP_LOCK_ASSERT(pmap, MA_OWNED); PMAP_LOCK_ASSERT(pmap, MA_OWNED);
/* /*
* unmap the page table page * unmap the page table page
*/ */
if (m->pindex >= (NUPDE + NUPDPE)) { if (m->pindex >= NUPDE + NUPDPE) {
/* PDP page */ /* PDP page */
pml4_entry_t *pml4; pml4_entry_t *pml4;
pml4 = pmap_pml4e(pmap, va); pml4 = pmap_pml4e(pmap, va);
*pml4 = 0; *pml4 = 0;
if (pmap->pm_pml4u != NULL && va <= VM_MAXUSER_ADDRESS) { if (pmap->pm_pml4u != NULL && va <= VM_MAXUSER_ADDRESS) {
pml4 = &pmap->pm_pml4u[pmap_pml4e_index(va)]; pml4 = &pmap->pm_pml4u[pmap_pml4e_index(va)];
*pml4 = 0; *pml4 = 0;
} }
Show All 10 Lines_pmap_unwire_ptp(pmap_t pmap, vm_offset_t va, vm_page_t m, struct spglist *free)
} }
pmap_resident_count_dec(pmap, 1); pmap_resident_count_dec(pmap, 1);
if (m->pindex < NUPDE) { if (m->pindex < NUPDE) {
/* We just released a PT, unhold the matching PD */ /* We just released a PT, unhold the matching PD */
vm_page_t pdpg; vm_page_t pdpg;
pdpg = PHYS_TO_VM_PAGE(*pmap_pdpe(pmap, va) & PG_FRAME); pdpg = PHYS_TO_VM_PAGE(*pmap_pdpe(pmap, va) & PG_FRAME);
pmap_unwire_ptp(pmap, va, pdpg, free); pmap_unwire_ptp(pmap, va, pdpg, free);
} } else if (m->pindex < NUPDE + NUPDPE) {
if (m->pindex >= NUPDE && m->pindex < (NUPDE + NUPDPE)) {
/* We just released a PD, unhold the matching PDP */ /* We just released a PD, unhold the matching PDP */
vm_page_t pdppg; vm_page_t pdppg;
pdppg = PHYS_TO_VM_PAGE(*pmap_pml4e(pmap, va) & PG_FRAME); pdppg = PHYS_TO_VM_PAGE(*pmap_pml4e(pmap, va) & PG_FRAME);
pmap_unwire_ptp(pmap, va, pdppg, free); pmap_unwire_ptp(pmap, va, pdppg, free);
} }
/* /*
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