X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Fasm-i386%2Fmach-xen%2Fasm%2Fpgalloc.h;fp=include%2Fasm-i386%2Fmach-xen%2Fasm%2Fpgalloc.h;h=726396a06569d4d311acafae60155469f8f52ac1;hb=1db395853d4f30d6120458bd279ede1f882a8525;hp=0000000000000000000000000000000000000000;hpb=34a75f0025b9cf803b6a88db032e6ad6950c9313;p=linux-2.6.git

diff --git a/include/asm-i386/mach-xen/asm/pgalloc.h b/include/asm-i386/mach-xen/asm/pgalloc.h
new file mode 100644
index 000000000..726396a06
--- /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 */