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Differential D21768 Diff 62477 sys/powerpc/booke/pmap.c

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sys/powerpc/booke/pmap.c

Show First 20 Lines • Show All 657 Lines • ▼ Show 20 Linespdir_unhold(mmu_t mmu, pmap_t pmap, u_int pp2d_idx)
/* decrement hold count */ /* decrement hold count */
pa = DMAP_TO_PHYS((vm_offset_t) pdir); pa = DMAP_TO_PHYS((vm_offset_t) pdir);
m = PHYS_TO_VM_PAGE(pa); m = PHYS_TO_VM_PAGE(pa);
/* /*
* Free pdir page if there are no dir entries in this pdir. * Free pdir page if there are no dir entries in this pdir.
*/ */
m->wire_count--; m->ref_count--;
if (m->wire_count == 0) { if (m->ref_count == 0) {
pdir_free(mmu, pmap, pp2d_idx, m); pdir_free(mmu, pmap, pp2d_idx, m);
return (1); return (1);
} }
return (0); return (0);
} }
/* /*
* Increment hold count for pdir pages. This routine is used when new ptlb * Increment hold count for pdir pages. This routine is used when new ptlb
* entry is being inserted into pdir. * entry is being inserted into pdir.
*/ */
static void static void
pdir_hold(mmu_t mmu, pmap_t pmap, pte_t ** pdir) pdir_hold(mmu_t mmu, pmap_t pmap, pte_t ** pdir)
{ {
vm_page_t m; vm_page_t m;
KASSERT((pmap != kernel_pmap), KASSERT((pmap != kernel_pmap),
("pdir_hold: holding kernel pdir!")); ("pdir_hold: holding kernel pdir!"));
KASSERT((pdir != NULL), ("pdir_hold: null pdir")); KASSERT((pdir != NULL), ("pdir_hold: null pdir"));
m = PHYS_TO_VM_PAGE(DMAP_TO_PHYS((vm_offset_t)pdir)); m = PHYS_TO_VM_PAGE(DMAP_TO_PHYS((vm_offset_t)pdir));
m->wire_count++; m->ref_count++;
} }
/* Allocate page table. */ /* Allocate page table. */
static pte_t * static pte_t *
ptbl_alloc(mmu_t mmu, pmap_t pmap, pte_t ** pdir, unsigned int pdir_idx, ptbl_alloc(mmu_t mmu, pmap_t pmap, pte_t ** pdir, unsigned int pdir_idx,
boolean_t nosleep) boolean_t nosleep)
{ {
vm_page_t m; vm_page_t m;
▲ Show 20 Lines • Show All 62 Lines • ▼ Show 20 Linesptbl_unhold(mmu_t mmu, pmap_t pmap, vm_offset_t va)
pdir = pmap->pm_pp2d[pp2d_idx]; pdir = pmap->pm_pp2d[pp2d_idx];
ptbl = pdir[pdir_idx]; ptbl = pdir[pdir_idx];
/* decrement hold count */ /* decrement hold count */
m = PHYS_TO_VM_PAGE(DMAP_TO_PHYS((vm_offset_t) ptbl)); m = PHYS_TO_VM_PAGE(DMAP_TO_PHYS((vm_offset_t) ptbl));
/* /*
* Free ptbl pages if there are no pte entries in this ptbl. * Free ptbl pages if there are no pte entries in this ptbl.
* wire_count has the same value for all ptbl pages, so check the * ref_count has the same value for all ptbl pages, so check the
* last page. * last page.
*/ */
m->wire_count--; m->ref_count--;
if (m->wire_count == 0) { if (m->ref_count == 0) {
ptbl_free(mmu, pmap, pdir, pdir_idx, m); ptbl_free(mmu, pmap, pdir, pdir_idx, m);
pdir_unhold(mmu, pmap, pp2d_idx); pdir_unhold(mmu, pmap, pp2d_idx);
return (1); return (1);
} }
return (0); return (0);
} }
/* /*
Show All 9 Linesptbl_hold(mmu_t mmu, pmap_t pmap, pte_t ** pdir, unsigned int pdir_idx)
KASSERT((pmap != kernel_pmap), KASSERT((pmap != kernel_pmap),
("ptbl_hold: holding kernel ptbl!")); ("ptbl_hold: holding kernel ptbl!"));
ptbl = pdir[pdir_idx]; ptbl = pdir[pdir_idx];
KASSERT((ptbl != NULL), ("ptbl_hold: null ptbl")); KASSERT((ptbl != NULL), ("ptbl_hold: null ptbl"));
m = PHYS_TO_VM_PAGE(DMAP_TO_PHYS((vm_offset_t) ptbl)); m = PHYS_TO_VM_PAGE(DMAP_TO_PHYS((vm_offset_t) ptbl));
m->wire_count++; m->ref_count++;
} }
#else #else
/* Initialize pool of kva ptbl buffers. */ /* Initialize pool of kva ptbl buffers. */
static void static void
ptbl_init(void) ptbl_init(void)
{ {
int i; int i;
▲ Show 20 Lines • Show All 198 Lines • ▼ Show 20 Linesptbl_unhold(mmu_t mmu, pmap_t pmap, unsigned int pdir_idx)
KASSERT(((vm_offset_t)ptbl >= VM_MIN_KERNEL_ADDRESS), KASSERT(((vm_offset_t)ptbl >= VM_MIN_KERNEL_ADDRESS),
("ptbl_unhold: non kva ptbl")); ("ptbl_unhold: non kva ptbl"));
/* decrement hold count */ /* decrement hold count */
for (i = 0; i < PTBL_PAGES; i++) { for (i = 0; i < PTBL_PAGES; i++) {
pa = pte_vatopa(mmu, kernel_pmap, pa = pte_vatopa(mmu, kernel_pmap,
(vm_offset_t)ptbl + (i * PAGE_SIZE)); (vm_offset_t)ptbl + (i * PAGE_SIZE));
m = PHYS_TO_VM_PAGE(pa); m = PHYS_TO_VM_PAGE(pa);
m->wire_count--; m->ref_count--;
} }
/* /*
* Free ptbl pages if there are no pte etries in this ptbl. * Free ptbl pages if there are no pte etries in this ptbl.
* wire_count has the same value for all ptbl pages, so check the last * ref_count has the same value for all ptbl pages, so check the last
* page. * page.
*/ */
if (m->wire_count == 0) { if (m->ref_count == 0) {
ptbl_free(mmu, pmap, pdir_idx); ptbl_free(mmu, pmap, pdir_idx);
//debugf("ptbl_unhold: e (freed ptbl)\n"); //debugf("ptbl_unhold: e (freed ptbl)\n");
return (1); return (1);
} }
return (0); return (0);
} }
Show All 21 Linesptbl_hold(mmu_t mmu, pmap_t pmap, unsigned int pdir_idx)
ptbl = pmap->pm_pdir[pdir_idx]; ptbl = pmap->pm_pdir[pdir_idx];
KASSERT((ptbl != NULL), ("ptbl_hold: null ptbl")); KASSERT((ptbl != NULL), ("ptbl_hold: null ptbl"));
for (i = 0; i < PTBL_PAGES; i++) { for (i = 0; i < PTBL_PAGES; i++) {
pa = pte_vatopa(mmu, kernel_pmap, pa = pte_vatopa(mmu, kernel_pmap,
(vm_offset_t)ptbl + (i * PAGE_SIZE)); (vm_offset_t)ptbl + (i * PAGE_SIZE));
m = PHYS_TO_VM_PAGE(pa); m = PHYS_TO_VM_PAGE(pa);
m->wire_count++; m->ref_count++;
} }
} }
#endif #endif
/* Allocate pv_entry structure. */ /* Allocate pv_entry structure. */
pv_entry_t pv_entry_t
pv_alloc(void) pv_alloc(void)
{ {
▲ Show 20 Lines • Show All 3,309 Lines • Show Last 20 Lines