fedora core 6 1.2949 + vserver 2.2.0

[linux-2.6.git] / include / asm-ia64 / page.h

diff --git a/include/asm-ia64/page.h b/include/asm-ia64/page.h
index 5e6362a..67bcaa6 100644 (file)
--- a/include/asm-ia64/page.h
+++ b/include/asm-ia64/page.h
@@ -7,7 +7,7 @@
  *     David Mosberger-Tang <davidm@hpl.hp.com>
  */
 
-#include <linux/config.h>
+# ifdef __KERNEL__
 
 #include <asm/intrinsics.h>
 #include <asm/types.h>
@@ -57,13 +57,14 @@
 
 # define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
 # define ARCH_HAS_HUGEPAGE_ONLY_RANGE
+# define ARCH_HAS_PREPARE_HUGEPAGE_RANGE
+# define ARCH_HAS_HUGETLB_FREE_PGD_RANGE
 #endif /* CONFIG_HUGETLB_PAGE */
 
 #ifdef __ASSEMBLY__
 # define __pa(x)               ((x) - PAGE_OFFSET)
 # define __va(x)               ((x) + PAGE_OFFSET)
 #else /* !__ASSEMBLY */
-# ifdef __KERNEL__
 #  define STRICT_MM_TYPECHECKS
 
 extern void clear_page (void *page);
@@ -100,24 +101,33 @@ do {                                              \
 
 #ifdef CONFIG_VIRTUAL_MEM_MAP
 extern int ia64_pfn_valid (unsigned long pfn);
-#elif defined(CONFIG_FLATMEM)
+#else
 # define ia64_pfn_valid(pfn) 1
 #endif
 
+#ifdef CONFIG_VIRTUAL_MEM_MAP
+extern struct page *vmem_map;
+#ifdef CONFIG_DISCONTIGMEM
+# define page_to_pfn(page)     ((unsigned long) (page - vmem_map))
+# define pfn_to_page(pfn)      (vmem_map + (pfn))
+#else
+# include <asm-generic/memory_model.h>
+#endif
+#else
+# include <asm-generic/memory_model.h>
+#endif
+
 #ifdef CONFIG_FLATMEM
 # define pfn_valid(pfn)                (((pfn) < max_mapnr) && ia64_pfn_valid(pfn))
-# define page_to_pfn(page)     ((unsigned long) (page - mem_map))
-# define pfn_to_page(pfn)      (mem_map + (pfn))
 #elif defined(CONFIG_DISCONTIGMEM)
-extern struct page *vmem_map;
 extern unsigned long min_low_pfn;
 extern unsigned long max_low_pfn;
 # define pfn_valid(pfn)                (((pfn) >= min_low_pfn) && ((pfn) < max_low_pfn) && ia64_pfn_valid(pfn))
-# define page_to_pfn(page)     ((unsigned long) (page - vmem_map))
-# define pfn_to_page(pfn)      (vmem_map + (pfn))
 #endif
 
+#ifndef CONFIG_XEN
 #define page_to_phys(page)     (page_to_pfn(page) << PAGE_SHIFT)
+#endif
 #define virt_to_page(kaddr)    pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
 #define pfn_to_kaddr(pfn)      __va((pfn) << PAGE_SHIFT)
 
@@ -147,7 +157,7 @@ typedef union ia64_va {
                                 | (REGION_OFFSET(x) >> (HPAGE_SHIFT-PAGE_SHIFT)))
 # define HUGETLB_PAGE_ORDER    (HPAGE_SHIFT - PAGE_SHIFT)
 # define is_hugepage_only_range(mm, addr, len)         \
-        (REGION_NUMBER(addr) == RGN_HPAGE &&   \
+        (REGION_NUMBER(addr) == RGN_HPAGE ||   \
          REGION_NUMBER((addr)+(len)-1) == RGN_HPAGE)
 extern unsigned int hpage_shift;
 #endif
@@ -165,7 +175,6 @@ get_order (unsigned long size)
        return order;
 }
 
-# endif /* __KERNEL__ */
 #endif /* !__ASSEMBLY__ */
 
 #ifdef STRICT_MM_TYPECHECKS
@@ -219,4 +228,54 @@ get_order (unsigned long size)
                                         (((current->personality & READ_IMPLIES_EXEC) != 0)     \
                                          ? VM_EXEC : 0))
 
+#define devmem_is_allowed(x) 1
+#ifndef __ASSEMBLY__
+#ifdef CONFIG_XEN
+
+#include <linux/kernel.h>
+#include <asm/hypervisor.h>
+#include <xen/features.h>      // to compile netback, netfront
+
+/*
+ * XXX hack!
+ * Linux/IA64 uses PG_arch_1.
+ * This hack will be removed once PG_foreign bit is taken.
+ * #include <xen/foreign_page.h>
+ */
+#ifdef __ASM_XEN_FOREIGN_PAGE_H__
+# error "don't include include/xen/foreign_page.h!"
+#endif
+
+extern struct address_space xen_ia64_foreign_dummy_mapping;
+#define PageForeign(page)      \
+       ((page)->mapping == &xen_ia64_foreign_dummy_mapping)
+
+#define SetPageForeign(page, dtor) do {                                \
+       set_page_private((page), (unsigned long)(dtor));        \
+       (page)->mapping = &xen_ia64_foreign_dummy_mapping;      \
+       smp_rmb();                                              \
+} while (0)
+
+#define ClearPageForeign(page) do {    \
+       (page)->mapping = NULL;         \
+       smp_rmb();                      \
+       set_page_private((page), 0);    \
+} while (0)
+
+#define PageForeignDestructor(page)    \
+       ( (void (*) (struct page *)) page_private(page) )
+
+#define arch_free_page(_page,_order)                   \
+({      int foreign = PageForeign(_page);               \
+       if (foreign)                                    \
+               (PageForeignDestructor(_page))(_page);  \
+       foreign;                                        \
+})
+#define HAVE_ARCH_FREE_PAGE
+
+#include <asm/maddr.h>
+
+#endif /* CONFIG_XEN */
+#endif /* __ASSEMBLY__ */
+#endif /* __KERNEL__ */
 #endif /* _ASM_IA64_PAGE_H */