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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2008-02-09 18:24:36 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2008-02-09 18:24:40 +0100
commit5a216a20837c5f5fa1ca4b8ae8991ffd96b08e6f (patch)
treedde54e28497e920fa460cc95dadb6b38f1b2dbe0 /include/asm-s390/pgalloc.h
parent146e4b3c8b92071b18f0b2e6f47165bad4f9e825 (diff)
[S390] Add four level page tables for CONFIG_64BIT=y.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'include/asm-s390/pgalloc.h')
-rw-r--r--include/asm-s390/pgalloc.h29
1 files changed, 24 insertions, 5 deletions
diff --git a/include/asm-s390/pgalloc.h b/include/asm-s390/pgalloc.h
index af4aee856df3..cc47dd65a499 100644
--- a/include/asm-s390/pgalloc.h
+++ b/include/asm-s390/pgalloc.h
@@ -73,11 +73,17 @@ static inline unsigned long pgd_entry_type(struct mm_struct *mm)
static inline unsigned long pgd_entry_type(struct mm_struct *mm)
{
- return _REGION3_ENTRY_EMPTY;
+ return _REGION2_ENTRY_EMPTY;
}
-#define pud_alloc_one(mm,address) ({ BUG(); ((pud_t *)2); })
-#define pud_free(mm, x) do { } while (0)
+static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long address)
+{
+ unsigned long *table = crst_table_alloc(mm, mm->context.noexec);
+ if (table)
+ crst_table_init(table, _REGION3_ENTRY_EMPTY);
+ return (pud_t *) table;
+}
+#define pud_free(mm, pud) crst_table_free(mm, (unsigned long *) pud)
static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long vmaddr)
{
@@ -88,8 +94,21 @@ static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long vmaddr)
}
#define pmd_free(mm, pmd) crst_table_free(mm, (unsigned long *) pmd)
-#define pgd_populate(mm, pgd, pud) BUG()
-#define pgd_populate_kernel(mm, pgd, pud) BUG()
+static inline void pgd_populate_kernel(struct mm_struct *mm,
+ pgd_t *pgd, pud_t *pud)
+{
+ pgd_val(*pgd) = _REGION2_ENTRY | __pa(pud);
+}
+
+static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud)
+{
+ pgd_t *shadow_pgd = get_shadow_table(pgd);
+ pud_t *shadow_pud = get_shadow_table(pud);
+
+ if (shadow_pgd && shadow_pud)
+ pgd_populate_kernel(mm, shadow_pgd, shadow_pud);
+ pgd_populate_kernel(mm, pgd, pud);
+}
static inline void pud_populate_kernel(struct mm_struct *mm,
pud_t *pud, pmd_t *pmd)