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 */