summaryrefslogtreecommitdiff
path: root/include/asm-x86/pgalloc_32.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/asm-x86/pgalloc_32.h')
-rw-r--r--include/asm-x86/pgalloc_32.h68
1 files changed, 68 insertions, 0 deletions
diff --git a/include/asm-x86/pgalloc_32.h b/include/asm-x86/pgalloc_32.h
new file mode 100644
index 000000000000..f2fc33ceb9f2
--- /dev/null
+++ b/include/asm-x86/pgalloc_32.h
@@ -0,0 +1,68 @@
+#ifndef _I386_PGALLOC_H
+#define _I386_PGALLOC_H
+
+#include <linux/threads.h>
+#include <linux/mm.h> /* for struct page */
+
+#ifdef CONFIG_PARAVIRT
+#include <asm/paravirt.h>
+#else
+#define paravirt_alloc_pt(mm, pfn) do { } while (0)
+#define paravirt_alloc_pd(pfn) do { } while (0)
+#define paravirt_alloc_pd(pfn) do { } while (0)
+#define paravirt_alloc_pd_clone(pfn, clonepfn, start, count) do { } while (0)
+#define paravirt_release_pt(pfn) do { } while (0)
+#define paravirt_release_pd(pfn) do { } while (0)
+#endif
+
+#define pmd_populate_kernel(mm, pmd, pte) \
+do { \
+ paravirt_alloc_pt(mm, __pa(pte) >> PAGE_SHIFT); \
+ set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte))); \
+} while (0)
+
+#define pmd_populate(mm, pmd, pte) \
+do { \
+ paravirt_alloc_pt(mm, page_to_pfn(pte)); \
+ set_pmd(pmd, __pmd(_PAGE_TABLE + \
+ ((unsigned long long)page_to_pfn(pte) << \
+ (unsigned long long) PAGE_SHIFT))); \
+} while (0)
+
+/*
+ * Allocate and free page tables.
+ */
+extern pgd_t *pgd_alloc(struct mm_struct *);
+extern void pgd_free(pgd_t *pgd);
+
+extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
+extern struct page *pte_alloc_one(struct mm_struct *, unsigned long);
+
+static inline void pte_free_kernel(pte_t *pte)
+{
+ free_page((unsigned long)pte);
+}
+
+static inline void pte_free(struct page *pte)
+{
+ __free_page(pte);
+}
+
+
+#define __pte_free_tlb(tlb,pte) \
+do { \
+ paravirt_release_pt(page_to_pfn(pte)); \
+ tlb_remove_page((tlb),(pte)); \
+} while (0)
+
+#ifdef CONFIG_X86_PAE
+/*
+ * In the PAE case we free the pmds as part of the pgd.
+ */
+#define pmd_alloc_one(mm, addr) ({ BUG(); ((pmd_t *)2); })
+#define pmd_free(x) do { } while (0)
+#define __pmd_free_tlb(tlb,x) do { } while (0)
+#define pud_populate(mm, pmd, pte) BUG()
+#endif
+
+#endif /* _I386_PGALLOC_H */