xen: make include/xen/page.h portable moving those definitions under asm dir

The definitions in include/asm/xen/page.h are arch specific.
ia64/xen wants to define its own version. So move them to arch specific
directory and keep include/xen/page.h in order not to break compilation.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

diff --git a/include/asm-x86/xen/page.h b/include/asm-x86/xen/page.h
new file mode 100644 (file)
index 0000000..0179930
--- /dev/null
+++ b/include/asm-x86/xen/page.h
@@ -0,0 +1,168 @@
+#ifndef __XEN_PAGE_H
+#define __XEN_PAGE_H
+
+#include <linux/pfn.h>
+
+#include <asm/uaccess.h>
+#include <asm/pgtable.h>
+
+#include <xen/features.h>
+
+/* Xen machine address */
+typedef struct xmaddr {
+       phys_addr_t maddr;
+} xmaddr_t;
+
+/* Xen pseudo-physical address */
+typedef struct xpaddr {
+       phys_addr_t paddr;
+} xpaddr_t;
+
+#define XMADDR(x)      ((xmaddr_t) { .maddr = (x) })
+#define XPADDR(x)      ((xpaddr_t) { .paddr = (x) })
+
+/**** MACHINE <-> PHYSICAL CONVERSION MACROS ****/
+#define INVALID_P2M_ENTRY      (~0UL)
+#define FOREIGN_FRAME_BIT      (1UL<<31)
+#define FOREIGN_FRAME(m)       ((m) | FOREIGN_FRAME_BIT)
+
+extern unsigned long *phys_to_machine_mapping;
+
+static inline unsigned long pfn_to_mfn(unsigned long pfn)
+{
+       if (xen_feature(XENFEAT_auto_translated_physmap))
+               return pfn;
+
+       return phys_to_machine_mapping[(unsigned int)(pfn)] &
+               ~FOREIGN_FRAME_BIT;
+}
+
+static inline int phys_to_machine_mapping_valid(unsigned long pfn)
+{
+       if (xen_feature(XENFEAT_auto_translated_physmap))
+               return 1;
+
+       return (phys_to_machine_mapping[pfn] != INVALID_P2M_ENTRY);
+}
+
+static inline unsigned long mfn_to_pfn(unsigned long mfn)
+{
+       unsigned long pfn;
+
+       if (xen_feature(XENFEAT_auto_translated_physmap))
+               return mfn;
+
+#if 0
+       if (unlikely((mfn >> machine_to_phys_order) != 0))
+               return max_mapnr;
+#endif
+
+       pfn = 0;
+       /*
+        * The array access can fail (e.g., device space beyond end of RAM).
+        * In such cases it doesn't matter what we return (we return garbage),
+        * but we must handle the fault without crashing!
+        */
+       __get_user(pfn, &machine_to_phys_mapping[mfn]);
+
+       return pfn;
+}
+
+static inline xmaddr_t phys_to_machine(xpaddr_t phys)
+{
+       unsigned offset = phys.paddr & ~PAGE_MASK;
+       return XMADDR(PFN_PHYS((u64)pfn_to_mfn(PFN_DOWN(phys.paddr))) | offset);
+}
+
+static inline xpaddr_t machine_to_phys(xmaddr_t machine)
+{
+       unsigned offset = machine.maddr & ~PAGE_MASK;
+       return XPADDR(PFN_PHYS((u64)mfn_to_pfn(PFN_DOWN(machine.maddr))) | offset);
+}
+
+/*
+ * We detect special mappings in one of two ways:
+ *  1. If the MFN is an I/O page then Xen will set the m2p entry
+ *     to be outside our maximum possible pseudophys range.
+ *  2. If the MFN belongs to a different domain then we will certainly
+ *     not have MFN in our p2m table. Conversely, if the page is ours,
+ *     then we'll have p2m(m2p(MFN))==MFN.
+ * If we detect a special mapping then it doesn't have a 'struct page'.
+ * We force !pfn_valid() by returning an out-of-range pointer.
+ *
+ * NB. These checks require that, for any MFN that is not in our reservation,
+ * there is no PFN such that p2m(PFN) == MFN. Otherwise we can get confused if
+ * we are foreign-mapping the MFN, and the other domain as m2p(MFN) == PFN.
+ * Yikes! Various places must poke in INVALID_P2M_ENTRY for safety.
+ *
+ * NB2. When deliberately mapping foreign pages into the p2m table, you *must*
+ *      use FOREIGN_FRAME(). This will cause pte_pfn() to choke on it, as we
+ *      require. In all the cases we care about, the FOREIGN_FRAME bit is
+ *      masked (e.g., pfn_to_mfn()) so behaviour there is correct.
+ */
+static inline unsigned long mfn_to_local_pfn(unsigned long mfn)
+{
+       extern unsigned long max_mapnr;
+       unsigned long pfn = mfn_to_pfn(mfn);
+       if ((pfn < max_mapnr)
+           && !xen_feature(XENFEAT_auto_translated_physmap)
+           && (phys_to_machine_mapping[pfn] != mfn))
+               return max_mapnr; /* force !pfn_valid() */
+       return pfn;
+}
+
+static inline void set_phys_to_machine(unsigned long pfn, unsigned long mfn)
+{
+       if (xen_feature(XENFEAT_auto_translated_physmap)) {
+               BUG_ON(pfn != mfn && mfn != INVALID_P2M_ENTRY);
+               return;
+       }
+       phys_to_machine_mapping[pfn] = mfn;
+}
+
+/* VIRT <-> MACHINE conversion */
+#define virt_to_machine(v)     (phys_to_machine(XPADDR(__pa(v))))
+#define virt_to_mfn(v)         (pfn_to_mfn(PFN_DOWN(__pa(v))))
+#define mfn_to_virt(m)         (__va(mfn_to_pfn(m) << PAGE_SHIFT))
+
+static inline unsigned long pte_mfn(pte_t pte)
+{
+       return (pte.pte & ~_PAGE_NX) >> PAGE_SHIFT;
+}
+
+static inline pte_t mfn_pte(unsigned long page_nr, pgprot_t pgprot)
+{
+       pte_t pte;
+
+       pte.pte = ((phys_addr_t)page_nr << PAGE_SHIFT) |
+               (pgprot_val(pgprot) & __supported_pte_mask);
+
+       return pte;
+}
+
+static inline pteval_t pte_val_ma(pte_t pte)
+{
+       return pte.pte;
+}
+
+static inline pte_t __pte_ma(pteval_t x)
+{
+       return (pte_t) { .pte = x };
+}
+
+#ifdef CONFIG_X86_PAE
+#define pmd_val_ma(v) ((v).pmd)
+#define pud_val_ma(v) ((v).pgd.pgd)
+#define __pmd_ma(x)    ((pmd_t) { (x) } )
+#else  /* !X86_PAE */
+#define pmd_val_ma(v)  ((v).pud.pgd.pgd)
+#endif /* CONFIG_X86_PAE */
+
+#define pgd_val_ma(x)  ((x).pgd)
+
+
+xmaddr_t arbitrary_virt_to_machine(unsigned long address);
+void make_lowmem_page_readonly(void *vaddr);
+void make_lowmem_page_readwrite(void *vaddr);
+
+#endif /* __XEN_PAGE_H */

diff --git a/include/xen/page.h b/include/xen/page.h
index 0179930..eaf85fa 100644 (file)
--- a/include/xen/page.h
+++ b/include/xen/page.h
@@ -1,168 +1 @@
-#ifndef __XEN_PAGE_H
-#define __XEN_PAGE_H
-
-#include <linux/pfn.h>
-
-#include <asm/uaccess.h>
-#include <asm/pgtable.h>
-
-#include <xen/features.h>
-
-/* Xen machine address */
-typedef struct xmaddr {
-       phys_addr_t maddr;
-} xmaddr_t;
-
-/* Xen pseudo-physical address */
-typedef struct xpaddr {
-       phys_addr_t paddr;
-} xpaddr_t;
-
-#define XMADDR(x)      ((xmaddr_t) { .maddr = (x) })
-#define XPADDR(x)      ((xpaddr_t) { .paddr = (x) })
-
-/**** MACHINE <-> PHYSICAL CONVERSION MACROS ****/
-#define INVALID_P2M_ENTRY      (~0UL)
-#define FOREIGN_FRAME_BIT      (1UL<<31)
-#define FOREIGN_FRAME(m)       ((m) | FOREIGN_FRAME_BIT)
-
-extern unsigned long *phys_to_machine_mapping;
-
-static inline unsigned long pfn_to_mfn(unsigned long pfn)
-{
-       if (xen_feature(XENFEAT_auto_translated_physmap))
-               return pfn;
-
-       return phys_to_machine_mapping[(unsigned int)(pfn)] &
-               ~FOREIGN_FRAME_BIT;
-}
-
-static inline int phys_to_machine_mapping_valid(unsigned long pfn)
-{
-       if (xen_feature(XENFEAT_auto_translated_physmap))
-               return 1;
-
-       return (phys_to_machine_mapping[pfn] != INVALID_P2M_ENTRY);
-}
-
-static inline unsigned long mfn_to_pfn(unsigned long mfn)
-{
-       unsigned long pfn;
-
-       if (xen_feature(XENFEAT_auto_translated_physmap))
-               return mfn;
-
-#if 0
-       if (unlikely((mfn >> machine_to_phys_order) != 0))
-               return max_mapnr;
-#endif
-
-       pfn = 0;
-       /*
-        * The array access can fail (e.g., device space beyond end of RAM).
-        * In such cases it doesn't matter what we return (we return garbage),
-        * but we must handle the fault without crashing!
-        */
-       __get_user(pfn, &machine_to_phys_mapping[mfn]);
-
-       return pfn;
-}
-
-static inline xmaddr_t phys_to_machine(xpaddr_t phys)
-{
-       unsigned offset = phys.paddr & ~PAGE_MASK;
-       return XMADDR(PFN_PHYS((u64)pfn_to_mfn(PFN_DOWN(phys.paddr))) | offset);
-}
-
-static inline xpaddr_t machine_to_phys(xmaddr_t machine)
-{
-       unsigned offset = machine.maddr & ~PAGE_MASK;
-       return XPADDR(PFN_PHYS((u64)mfn_to_pfn(PFN_DOWN(machine.maddr))) | offset);
-}
-
-/*
- * We detect special mappings in one of two ways:
- *  1. If the MFN is an I/O page then Xen will set the m2p entry
- *     to be outside our maximum possible pseudophys range.
- *  2. If the MFN belongs to a different domain then we will certainly
- *     not have MFN in our p2m table. Conversely, if the page is ours,
- *     then we'll have p2m(m2p(MFN))==MFN.
- * If we detect a special mapping then it doesn't have a 'struct page'.
- * We force !pfn_valid() by returning an out-of-range pointer.
- *
- * NB. These checks require that, for any MFN that is not in our reservation,
- * there is no PFN such that p2m(PFN) == MFN. Otherwise we can get confused if
- * we are foreign-mapping the MFN, and the other domain as m2p(MFN) == PFN.
- * Yikes! Various places must poke in INVALID_P2M_ENTRY for safety.
- *
- * NB2. When deliberately mapping foreign pages into the p2m table, you *must*
- *      use FOREIGN_FRAME(). This will cause pte_pfn() to choke on it, as we
- *      require. In all the cases we care about, the FOREIGN_FRAME bit is
- *      masked (e.g., pfn_to_mfn()) so behaviour there is correct.
- */
-static inline unsigned long mfn_to_local_pfn(unsigned long mfn)
-{
-       extern unsigned long max_mapnr;
-       unsigned long pfn = mfn_to_pfn(mfn);
-       if ((pfn < max_mapnr)
-           && !xen_feature(XENFEAT_auto_translated_physmap)
-           && (phys_to_machine_mapping[pfn] != mfn))
-               return max_mapnr; /* force !pfn_valid() */
-       return pfn;
-}
-
-static inline void set_phys_to_machine(unsigned long pfn, unsigned long mfn)
-{
-       if (xen_feature(XENFEAT_auto_translated_physmap)) {
-               BUG_ON(pfn != mfn && mfn != INVALID_P2M_ENTRY);
-               return;
-       }
-       phys_to_machine_mapping[pfn] = mfn;
-}
-
-/* VIRT <-> MACHINE conversion */
-#define virt_to_machine(v)     (phys_to_machine(XPADDR(__pa(v))))
-#define virt_to_mfn(v)         (pfn_to_mfn(PFN_DOWN(__pa(v))))
-#define mfn_to_virt(m)         (__va(mfn_to_pfn(m) << PAGE_SHIFT))
-
-static inline unsigned long pte_mfn(pte_t pte)
-{
-       return (pte.pte & ~_PAGE_NX) >> PAGE_SHIFT;
-}
-
-static inline pte_t mfn_pte(unsigned long page_nr, pgprot_t pgprot)
-{
-       pte_t pte;
-
-       pte.pte = ((phys_addr_t)page_nr << PAGE_SHIFT) |
-               (pgprot_val(pgprot) & __supported_pte_mask);
-
-       return pte;
-}
-
-static inline pteval_t pte_val_ma(pte_t pte)
-{
-       return pte.pte;
-}
-
-static inline pte_t __pte_ma(pteval_t x)
-{
-       return (pte_t) { .pte = x };
-}
-
-#ifdef CONFIG_X86_PAE
-#define pmd_val_ma(v) ((v).pmd)
-#define pud_val_ma(v) ((v).pgd.pgd)
-#define __pmd_ma(x)    ((pmd_t) { (x) } )
-#else  /* !X86_PAE */
-#define pmd_val_ma(v)  ((v).pud.pgd.pgd)
-#endif /* CONFIG_X86_PAE */
-
-#define pgd_val_ma(x)  ((x).pgd)
-
-
-xmaddr_t arbitrary_virt_to_machine(unsigned long address);
-void make_lowmem_page_readonly(void *vaddr);
-void make_lowmem_page_readwrite(void *vaddr);
-
-#endif /* __XEN_PAGE_H */
+#include <asm/xen/page.h>