Differential D24238 Diff 70057 sys/powerpc/booke/pmap_64.c

Changeset View

Standalone View

sys/powerpc/booke/pmap_64.c

Show First 20 Lines • Show All 139 Lines • ▼ Show 20 Lines	static pte_t *ptbl_alloc(mmu_t mmu, pmap_t pmap, vm_offset_t va,
bool nosleep, bool *is_new);		bool nosleep, bool *is_new);
static void ptbl_hold(mmu_t, pmap_t, pte_t *);		static void ptbl_hold(mmu_t, pmap_t, pte_t *);
static int ptbl_unhold(mmu_t, pmap_t, vm_offset_t);		static int ptbl_unhold(mmu_t, pmap_t, vm_offset_t);

static vm_paddr_t pte_vatopa(mmu_t, pmap_t, vm_offset_t);		static vm_paddr_t pte_vatopa(mmu_t, pmap_t, vm_offset_t);
static int pte_enter(mmu_t, pmap_t, vm_page_t, vm_offset_t, uint32_t, boolean_t);		static int pte_enter(mmu_t, pmap_t, vm_page_t, vm_offset_t, uint32_t, boolean_t);
static int pte_remove(mmu_t, pmap_t, vm_offset_t, uint8_t);		static int pte_remove(mmu_t, pmap_t, vm_offset_t, uint8_t);
static pte_t *pte_find(mmu_t, pmap_t, vm_offset_t);		static pte_t *pte_find(mmu_t, pmap_t, vm_offset_t);
		static pte_t pte_find_next(mmu_t, pmap_t, vm_offset_t );
static void kernel_pte_alloc(vm_offset_t, vm_offset_t);		static void kernel_pte_alloc(vm_offset_t, vm_offset_t);

/**************************************************************************/		/**************************************************************************/
/* Page table related */		/* Page table related */
/**************************************************************************/		/**************************************************************************/

/* Allocate a page, to be used in a page table. */		/* Allocate a page, to be used in a page table. */
static vm_offset_t		static vm_offset_t
▲ Show 20 Lines • Show All 41 Lines • ▼ Show 20 Lines	pte_find(mmu_t mmu, pmap_t pmap, vm_offset_t va)
if (pdir_l1 == NULL)		if (pdir_l1 == NULL)
return (NULL);		return (NULL);
pdir = pdir_l1[PDIR_L1_IDX(va)];		pdir = pdir_l1[PDIR_L1_IDX(va)];
if (pdir == NULL)		if (pdir == NULL)
return (NULL);		return (NULL);
ptbl = pdir[PDIR_IDX(va)];		ptbl = pdir[PDIR_IDX(va)];

return ((ptbl != NULL) ? &ptbl[PTBL_IDX(va)] : NULL);		return ((ptbl != NULL) ? &ptbl[PTBL_IDX(va)] : NULL);
		}

		/* Get a pointer to a PTE in a page table, or the next closest (greater) one. */
		static __inline pte_t *
		pte_find_next(mmu_t mmu, pmap_t pmap, vm_offset_t *pva)
		{
		vm_offset_t va;
		pte_t ****pm_root;
		pte_t *pte;
		unsigned long i, j, k, l;

		KASSERT((pmap != NULL), ("pte_find: invalid pmap"));

		va = *pva;
		i = PG_ROOT_IDX(va);
		j = PDIR_L1_IDX(va);
		k = PDIR_IDX(va);
		l = PTBL_IDX(va);
		pm_root = pmap->pm_root;
		/* truncate the VA for later. */
		va &= ~((1UL << (PG_ROOT_H + 1)) - 1);
		for (; i < PG_ROOT_NENTRIES; i++, j = 0) {
		if (pm_root[i] == 0)
		continue;
		for (; j < PDIR_L1_NENTRIES; j++, k = 0) {
		if (pm_root[i][j] == 0)
		continue;
		for (; k < PDIR_NENTRIES; k++, l = 0) {
		if (pm_root[i][j][k] == NULL)
		continue;
		for (; l < PTBL_NENTRIES; l++) {
		pte = &pm_root[i][j][k][l];
		if (!PTE_ISVALID(pte))
		continue;
		pva = va + PG_ROOT_SIZE i +
		PDIR_L1_SIZE * j +
		PDIR_SIZE * k +
		PAGE_SIZE * l;
		return (pte);
		}
		}
		}
		}
		return (NULL);
}		}

static bool		static bool
unhold_free_page(mmu_t mmu, pmap_t pmap, vm_page_t m)		unhold_free_page(mmu_t mmu, pmap_t pmap, vm_page_t m)
{		{

m->ref_count--;		m->ref_count--;
if (m->ref_count == 0) {		if (m->ref_count == 0) {
▲ Show 20 Lines • Show All 529 Lines • Show Last 20 Lines