fedora core 6 1.2949 + vserver 2.2.0

[linux-2.6.git] / include / asm-x86_64 / pgalloc.h

diff --git a/include/asm-x86_64/pgalloc.h b/include/asm-x86_64/pgalloc.h
index bebcaab..21b7f3f 100644 (file)
--- a/include/asm-x86_64/pgalloc.h
+++ b/include/asm-x86_64/pgalloc.h
@@ -1,28 +1,36 @@
 #ifndef _X86_64_PGALLOC_H
 #define _X86_64_PGALLOC_H
 
-#include <asm/processor.h>
 #include <asm/fixmap.h>
 #include <asm/pda.h>
 #include <linux/threads.h>
 #include <linux/mm.h>
 
+#define arch_add_exec_range(mm, limit) \
+               do { (void)(mm), (void)(limit); } while (0)
+#define arch_flush_exec_range(mm) \
+               do { (void)(mm); } while (0)
+#define arch_remove_exec_range(mm, limit) \
+               do { (void)(mm), (void)(limit); } while (0)
+
 #define pmd_populate_kernel(mm, pmd, pte) \
                set_pmd(pmd, __pmd(_PAGE_TABLE | __pa(pte)))
-#define pgd_populate(mm, pgd, pmd) \
-               set_pgd(pgd, __pgd(_PAGE_TABLE | __pa(pmd)))
+#define pud_populate(mm, pud, pmd) \
+               set_pud(pud, __pud(_PAGE_TABLE | __pa(pmd)))
+#define pgd_populate(mm, pgd, pud) \
+               set_pgd(pgd, __pgd(_PAGE_TABLE | __pa(pud)))
 
 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *pte)
 {
        set_pmd(pmd, __pmd(_PAGE_TABLE | (page_to_pfn(pte) << PAGE_SHIFT)));
 }
 
-extern __inline__ pmd_t *get_pmd(void)
+static inline pmd_t *get_pmd(void)
 {
        return (pmd_t *)get_zeroed_page(GFP_KERNEL);
 }
 
-extern __inline__ void pmd_free(pmd_t *pmd)
+static inline void pmd_free(pmd_t *pmd)
 {
        BUG_ON((unsigned long)pmd & (PAGE_SIZE-1));
        free_page((unsigned long)pmd);
@@ -33,14 +41,67 @@ static inline pmd_t *pmd_alloc_one (struct mm_struct *mm, unsigned long addr)
        return (pmd_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT);
 }
 
-static inline pgd_t *pgd_alloc (struct mm_struct *mm)
+static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
 {
-       return (pgd_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT);
+       return (pud_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT);
 }
 
-static inline void pgd_free (pgd_t *pgd)
+static inline void pud_free (pud_t *pud)
+{
+       BUG_ON((unsigned long)pud & (PAGE_SIZE-1));
+       free_page((unsigned long)pud);
+}
+
+static inline void pgd_list_add(pgd_t *pgd)
+{
+       struct page *page = virt_to_page(pgd);
+
+       spin_lock(&pgd_lock);
+       page->index = (pgoff_t)pgd_list;
+       if (pgd_list)
+               pgd_list->private = (unsigned long)&page->index;
+       pgd_list = page;
+       page->private = (unsigned long)&pgd_list;
+       spin_unlock(&pgd_lock);
+}
+
+static inline void pgd_list_del(pgd_t *pgd)
+{
+       struct page *next, **pprev, *page = virt_to_page(pgd);
+
+       spin_lock(&pgd_lock);
+       next = (struct page *)page->index;
+       pprev = (struct page **)page->private;
+       *pprev = next;
+       if (next)
+               next->private = (unsigned long)pprev;
+       spin_unlock(&pgd_lock);
+}
+
+static inline pgd_t *pgd_alloc(struct mm_struct *mm)
+{
+       unsigned boundary;
+       pgd_t *pgd = (pgd_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT);
+       if (!pgd)
+               return NULL;
+       pgd_list_add(pgd);
+       /*
+        * Copy kernel pointers in from init.
+        * Could keep a freelist or slab cache of those because the kernel
+        * part never changes.
+        */
+       boundary = pgd_index(__PAGE_OFFSET);
+       memset(pgd, 0, boundary * sizeof(pgd_t));
+       memcpy(pgd + boundary,
+              init_level4_pgt + boundary,
+              (PTRS_PER_PGD - boundary) * sizeof(pgd_t));
+       return pgd;
+}
+
+static inline void pgd_free(pgd_t *pgd)
 {
        BUG_ON((unsigned long)pgd & (PAGE_SIZE-1));
+       pgd_list_del(pgd);
        free_page((unsigned long)pgd);
 }
 
@@ -60,18 +121,20 @@ static inline struct page *pte_alloc_one(struct mm_struct *mm, unsigned long add
 /* Should really implement gc for free page table pages. This could be
    done with a reference count in struct page. */
 
-extern __inline__ void pte_free_kernel(pte_t *pte)
+static inline void pte_free_kernel(pte_t *pte)
 {
        BUG_ON((unsigned long)pte & (PAGE_SIZE-1));
        free_page((unsigned long)pte); 
 }
 
-extern inline void pte_free(struct page *pte)
+static inline void pte_free(struct page *pte)
 {
        __free_page(pte);
 } 
 
 #define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
-#define __pmd_free_tlb(tlb,x)   pmd_free(x)
+
+#define __pmd_free_tlb(tlb,x)   tlb_remove_page((tlb),virt_to_page(x))
+#define __pud_free_tlb(tlb,x)   tlb_remove_page((tlb),virt_to_page(x))
 
 #endif /* _X86_64_PGALLOC_H */