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authorDavid S. Miller <davem@davemloft.net>2006-03-22 00:49:59 -0800
committerDavid S. Miller <davem@sunset.davemloft.net>2006-03-22 01:15:14 -0800
commitdcc1e8dd88d4bc55e32a26dad7633d20ffe606d2 (patch)
treea47592213d94f918867d3dd81bb91dac3e727dea /arch/sparc64/mm/hugetlbpage.c
parent14778d9072e53d2171f66ffd9657daff41acfaed (diff)
[SPARC64]: Add a secondary TSB for hugepage mappings.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc64/mm/hugetlbpage.c')
-rw-r--r--arch/sparc64/mm/hugetlbpage.c28
1 files changed, 19 insertions, 9 deletions
diff --git a/arch/sparc64/mm/hugetlbpage.c b/arch/sparc64/mm/hugetlbpage.c
index a7a24869d04..0a1d4cd24cd 100644
--- a/arch/sparc64/mm/hugetlbpage.c
+++ b/arch/sparc64/mm/hugetlbpage.c
@@ -199,13 +199,11 @@ pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr)
pte_t *pte = NULL;
pgd = pgd_offset(mm, addr);
- if (pgd) {
- pud = pud_offset(pgd, addr);
- if (pud) {
- pmd = pmd_alloc(mm, pud, addr);
- if (pmd)
- pte = pte_alloc_map(mm, pmd, addr);
- }
+ pud = pud_alloc(mm, pgd, addr);
+ if (pud) {
+ pmd = pmd_alloc(mm, pud, addr);
+ if (pmd)
+ pte = pte_alloc_map(mm, pmd, addr);
}
return pte;
}
@@ -231,13 +229,14 @@ pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr)
return pte;
}
-#define mk_pte_huge(entry) do { pte_val(entry) |= _PAGE_SZHUGE; } while (0)
-
void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, pte_t entry)
{
int i;
+ if (!pte_present(*ptep) && pte_present(entry))
+ mm->context.huge_pte_count++;
+
for (i = 0; i < (1 << HUGETLB_PAGE_ORDER); i++) {
set_pte_at(mm, addr, ptep, entry);
ptep++;
@@ -253,6 +252,8 @@ pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
int i;
entry = *ptep;
+ if (pte_present(entry))
+ mm->context.huge_pte_count--;
for (i = 0; i < (1 << HUGETLB_PAGE_ORDER); i++) {
pte_clear(mm, addr, ptep);
@@ -302,6 +303,15 @@ static void context_reload(void *__data)
void hugetlb_prefault_arch_hook(struct mm_struct *mm)
{
+ struct tsb_config *tp = &mm->context.tsb_block[MM_TSB_HUGE];
+
+ if (likely(tp->tsb != NULL))
+ return;
+
+ tsb_grow(mm, MM_TSB_HUGE, 0);
+ tsb_context_switch(mm);
+ smp_tsb_sync(mm);
+
/* On UltraSPARC-III+ and later, configure the second half of
* the Data-TLB for huge pages.
*/