This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / include / asm-i386 / mach-xen / asm / pgalloc.h

diff --git a/include/asm-i386/mach-xen/asm/pgalloc.h b/include/asm-i386/mach-xen/asm/pgalloc.h
new file mode 100644 (file)
index 0000000..726396a
--- /dev/null
+++ b/include/asm-i386/mach-xen/asm/pgalloc.h
@@ -0,0 +1,65 @@
+#ifndef _I386_PGALLOC_H
+#define _I386_PGALLOC_H
+
+#include <linux/config.h>
+#include <asm/fixmap.h>
+#include <asm/desc.h>
+#include <linux/threads.h>
+#include <linux/mm.h>          /* for struct page */
+#include <asm/io.h>            /* for phys_to_virt and page_to_pseudophys */
+
+/* Is this pagetable pinned? */
+#define PG_pinned      PG_arch_1
+
+#define pmd_populate_kernel(mm, pmd, pte) \
+               set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte)))
+
+#define pmd_populate(mm, pmd, pte)                                     \
+do {                                                                   \
+       if (test_bit(PG_pinned, &virt_to_page((mm)->pgd)->flags)) {     \
+               if (!PageHighMem(pte))                                  \
+                       BUG_ON(HYPERVISOR_update_va_mapping(            \
+                         (unsigned long)__va(page_to_pfn(pte)<<PAGE_SHIFT),\
+                         pfn_pte(page_to_pfn(pte), PAGE_KERNEL_RO), 0));\
+               set_pmd(pmd, __pmd(_PAGE_TABLE +                        \
+                       ((unsigned long long)page_to_pfn(pte) <<        \
+                               (unsigned long long) PAGE_SHIFT)));     \
+       } else {                                                        \
+               *(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);
+       make_page_writable(pte, XENFEAT_writable_page_tables);
+}
+
+extern void pte_free(struct page *pte);
+
+#define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
+
+#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
+
+#define check_pgt_cache()      do { } while (0)
+
+#endif /* _I386_PGALLOC_H */