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xen-changelog
[Xen-changelog] [IA64] dom0 vp model linux part: import page.h from linu
# HG changeset patch
# User awilliam@xxxxxxxxxxx
# Node ID aab421b5ad452a3ab13e1a46bf5135f3885437a6
# Parent c160c05da8d4cc7bf963ae95131d39548c78dca0
[IA64] dom0 vp model linux part: import page.h from linux-2.6.16-rc3
[note: verified same as linux-2.6.16]
Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
diff -r c160c05da8d4 -r aab421b5ad45
linux-2.6-xen-sparse/include/asm-ia64/page.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/linux-2.6-xen-sparse/include/asm-ia64/page.h Fri Apr 07 14:01:13
2006 -0600
@@ -0,0 +1,222 @@
+#ifndef _ASM_IA64_PAGE_H
+#define _ASM_IA64_PAGE_H
+/*
+ * Pagetable related stuff.
+ *
+ * Copyright (C) 1998, 1999, 2002 Hewlett-Packard Co
+ * David Mosberger-Tang <davidm@xxxxxxxxxx>
+ */
+
+#include <linux/config.h>
+
+#include <asm/intrinsics.h>
+#include <asm/types.h>
+
+/*
+ * The top three bits of an IA64 address are its Region Number.
+ * Different regions are assigned to different purposes.
+ */
+#define RGN_SHIFT (61)
+#define RGN_BASE(r) (__IA64_UL_CONST(r)<<RGN_SHIFT)
+#define RGN_BITS (RGN_BASE(-1))
+
+#define RGN_KERNEL 7 /* Identity mapped region */
+#define RGN_UNCACHED 6 /* Identity mapped I/O region */
+#define RGN_GATE 5 /* Gate page, Kernel text, etc */
+#define RGN_HPAGE 4 /* For Huge TLB pages */
+
+/*
+ * PAGE_SHIFT determines the actual kernel page size.
+ */
+#if defined(CONFIG_IA64_PAGE_SIZE_4KB)
+# define PAGE_SHIFT 12
+#elif defined(CONFIG_IA64_PAGE_SIZE_8KB)
+# define PAGE_SHIFT 13
+#elif defined(CONFIG_IA64_PAGE_SIZE_16KB)
+# define PAGE_SHIFT 14
+#elif defined(CONFIG_IA64_PAGE_SIZE_64KB)
+# define PAGE_SHIFT 16
+#else
+# error Unsupported page size!
+#endif
+
+#define PAGE_SIZE (__IA64_UL_CONST(1) << PAGE_SHIFT)
+#define PAGE_MASK (~(PAGE_SIZE - 1))
+#define PAGE_ALIGN(addr) (((addr) + PAGE_SIZE - 1) & PAGE_MASK)
+
+#define PERCPU_PAGE_SHIFT 16 /* log2() of max. size of per-CPU area
*/
+#define PERCPU_PAGE_SIZE (__IA64_UL_CONST(1) << PERCPU_PAGE_SHIFT)
+
+
+#ifdef CONFIG_HUGETLB_PAGE
+# define HPAGE_REGION_BASE RGN_BASE(RGN_HPAGE)
+# define HPAGE_SHIFT hpage_shift
+# define HPAGE_SHIFT_DEFAULT 28 /* check ia64 SDM for architecture
supported size */
+# define HPAGE_SIZE (__IA64_UL_CONST(1) << HPAGE_SHIFT)
+# define HPAGE_MASK (~(HPAGE_SIZE - 1))
+
+# define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
+# define ARCH_HAS_HUGEPAGE_ONLY_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);
+extern void copy_page (void *to, void *from);
+
+/*
+ * clear_user_page() and copy_user_page() can't be inline functions because
+ * flush_dcache_page() can't be defined until later...
+ */
+#define clear_user_page(addr, vaddr, page) \
+do { \
+ clear_page(addr); \
+ flush_dcache_page(page); \
+} while (0)
+
+#define copy_user_page(to, from, vaddr, page) \
+do { \
+ copy_page((to), (from)); \
+ flush_dcache_page(page); \
+} while (0)
+
+
+#define alloc_zeroed_user_highpage(vma, vaddr) \
+({ \
+ struct page *page = alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma,
vaddr); \
+ if (page) \
+ flush_dcache_page(page); \
+ page; \
+})
+
+#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
+
+#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
+
+#ifdef CONFIG_VIRTUAL_MEM_MAP
+extern int ia64_pfn_valid (unsigned long pfn);
+#elif defined(CONFIG_FLATMEM)
+# define ia64_pfn_valid(pfn) 1
+#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
+
+#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
+#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
+#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
+
+typedef union ia64_va {
+ struct {
+ unsigned long off : 61; /* intra-region offset */
+ unsigned long reg : 3; /* region number */
+ } f;
+ unsigned long l;
+ void *p;
+} ia64_va;
+
+/*
+ * Note: These macros depend on the fact that PAGE_OFFSET has all
+ * region bits set to 1 and all other bits set to zero. They are
+ * expressed in this way to ensure they result in a single "dep"
+ * instruction.
+ */
+#define __pa(x) ({ia64_va _v; _v.l = (long) (x); _v.f.reg = 0;
_v.l;})
+#define __va(x) ({ia64_va _v; _v.l = (long) (x); _v.f.reg = -1;
_v.p;})
+
+#define REGION_NUMBER(x) ({ia64_va _v; _v.l = (long) (x); _v.f.reg;})
+#define REGION_OFFSET(x) ({ia64_va _v; _v.l = (long) (x); _v.f.off;})
+
+#ifdef CONFIG_HUGETLB_PAGE
+# define htlbpage_to_page(x) (((unsigned long) REGION_NUMBER(x) << 61)
\
+ | (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)+(len)-1) == RGN_HPAGE)
+extern unsigned int hpage_shift;
+#endif
+
+static __inline__ int
+get_order (unsigned long size)
+{
+ long double d = size - 1;
+ long order;
+
+ order = ia64_getf_exp(d);
+ order = order - PAGE_SHIFT - 0xffff + 1;
+ if (order < 0)
+ order = 0;
+ return order;
+}
+
+# endif /* __KERNEL__ */
+#endif /* !__ASSEMBLY__ */
+
+#ifdef STRICT_MM_TYPECHECKS
+ /*
+ * These are used to make use of C type-checking..
+ */
+ typedef struct { unsigned long pte; } pte_t;
+ typedef struct { unsigned long pmd; } pmd_t;
+#ifdef CONFIG_PGTABLE_4
+ typedef struct { unsigned long pud; } pud_t;
+#endif
+ typedef struct { unsigned long pgd; } pgd_t;
+ typedef struct { unsigned long pgprot; } pgprot_t;
+
+# define pte_val(x) ((x).pte)
+# define pmd_val(x) ((x).pmd)
+#ifdef CONFIG_PGTABLE_4
+# define pud_val(x) ((x).pud)
+#endif
+# define pgd_val(x) ((x).pgd)
+# define pgprot_val(x) ((x).pgprot)
+
+# define __pte(x) ((pte_t) { (x) } )
+# define __pgprot(x) ((pgprot_t) { (x) } )
+
+#else /* !STRICT_MM_TYPECHECKS */
+ /*
+ * .. while these make it easier on the compiler
+ */
+# ifndef __ASSEMBLY__
+ typedef unsigned long pte_t;
+ typedef unsigned long pmd_t;
+ typedef unsigned long pgd_t;
+ typedef unsigned long pgprot_t;
+# endif
+
+# define pte_val(x) (x)
+# define pmd_val(x) (x)
+# define pgd_val(x) (x)
+# define pgprot_val(x) (x)
+
+# define __pte(x) (x)
+# define __pgd(x) (x)
+# define __pgprot(x) (x)
+#endif /* !STRICT_MM_TYPECHECKS */
+
+#define PAGE_OFFSET RGN_BASE(RGN_KERNEL)
+
+#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE |
\
+ VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC
| \
+ (((current->personality &
READ_IMPLIES_EXEC) != 0) \
+ ? VM_EXEC : 0))
+
+#endif /* _ASM_IA64_PAGE_H */
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