1 files changed, 206 insertions, 0 deletions

diff --git a/include/asm-x86/page_32.h b/include/asm-x86/page_32.h
new file mode 100644
index 000000000000..80ecc66b6d86
--- /dev/null
+++ b/include/asm-x86/page_32.h
@@ -0,0 +1,206 @@
+#ifndef _I386_PAGE_H
+#define _I386_PAGE_H
+
+/* PAGE_SHIFT determines the page size */
+#define PAGE_SHIFT      12
+#define PAGE_SIZE       (1UL << PAGE_SHIFT)
+#define PAGE_MASK       (~(PAGE_SIZE-1))
+
+#define LARGE_PAGE_MASK (~(LARGE_PAGE_SIZE-1))
+#define LARGE_PAGE_SIZE (1UL << PMD_SHIFT)
+
+#ifdef __KERNEL__
+#ifndef __ASSEMBLY__
+
+#ifdef CONFIG_X86_USE_3DNOW
+
+#include <asm/mmx.h>
+
+#define clear_page(page)        mmx_clear_page((void *)(page))
+#define copy_page(to,from)      mmx_copy_page(to,from)
+
+#else
+
+/*
+ *      On older X86 processors it's not a win to use MMX here it seems.
+ *      Maybe the K6-III ?
+ */
+ 
+#define clear_page(page)        memset((void *)(page), 0, PAGE_SIZE)
+#define copy_page(to,from)      memcpy((void *)(to), (void *)(from), PAGE_SIZE)
+
+#endif
+
+#define clear_user_page(page, vaddr, pg)        clear_page(page)
+#define copy_user_page(to, from, vaddr, pg)     copy_page(to, from)
+
+#define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
+        alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
+#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
+
+/*
+ * These are used to make use of C type-checking..
+ */
+extern int nx_enabled;
+
+#ifdef CONFIG_X86_PAE
+typedef struct { unsigned long pte_low, pte_high; } pte_t;
+typedef struct { unsigned long long pmd; } pmd_t;
+typedef struct { unsigned long long pgd; } pgd_t;
+typedef struct { unsigned long long pgprot; } pgprot_t;
+
+static inline unsigned long long native_pgd_val(pgd_t pgd)
+{
+        return pgd.pgd;
+}
+
+static inline unsigned long long native_pmd_val(pmd_t pmd)
+{
+        return pmd.pmd;
+}
+
+static inline unsigned long long native_pte_val(pte_t pte)
+{
+        return pte.pte_low | ((unsigned long long)pte.pte_high << 32);
+}
+
+static inline pgd_t native_make_pgd(unsigned long long val)
+{
+        return (pgd_t) { val };
+}
+
+static inline pmd_t native_make_pmd(unsigned long long val)
+{
+        return (pmd_t) { val };
+}
+
+static inline pte_t native_make_pte(unsigned long long val)
+{
+        return (pte_t) { .pte_low = val, .pte_high = (val >> 32) } ;
+}
+
+#ifndef CONFIG_PARAVIRT
+#define pmd_val(x)      native_pmd_val(x)
+#define __pmd(x)        native_make_pmd(x)
+#endif
+
+#define HPAGE_SHIFT     21
+#include <asm-generic/pgtable-nopud.h>
+#else  /* !CONFIG_X86_PAE */
+typedef struct { unsigned long pte_low; } pte_t;
+typedef struct { unsigned long pgd; } pgd_t;
+typedef struct { unsigned long pgprot; } pgprot_t;
+#define boot_pte_t pte_t /* or would you rather have a typedef */
+
+static inline unsigned long native_pgd_val(pgd_t pgd)
+{
+        return pgd.pgd;
+}
+
+static inline unsigned long native_pte_val(pte_t pte)
+{
+        return pte.pte_low;
+}
+
+static inline pgd_t native_make_pgd(unsigned long val)
+{
+        return (pgd_t) { val };
+}
+
+static inline pte_t native_make_pte(unsigned long val)
+{
+        return (pte_t) { .pte_low = val };
+}
+
+#define HPAGE_SHIFT     22
+#include <asm-generic/pgtable-nopmd.h>
+#endif  /* CONFIG_X86_PAE */
+
+#define PTE_MASK        PAGE_MASK
+
+#ifdef CONFIG_HUGETLB_PAGE
+#define HPAGE_SIZE      ((1UL) << HPAGE_SHIFT)
+#define HPAGE_MASK      (~(HPAGE_SIZE - 1))
+#define HUGETLB_PAGE_ORDER      (HPAGE_SHIFT - PAGE_SHIFT)
+#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
+#endif
+
+#define pgprot_val(x)   ((x).pgprot)
+#define __pgprot(x)     ((pgprot_t) { (x) } )
+
+#ifndef CONFIG_PARAVIRT
+#define pgd_val(x)      native_pgd_val(x)
+#define __pgd(x)        native_make_pgd(x)
+#define pte_val(x)      native_pte_val(x)
+#define __pte(x)        native_make_pte(x)
+#endif
+
+#endif /* !__ASSEMBLY__ */
+
+/* to align the pointer to the (next) page boundary */
+#define PAGE_ALIGN(addr)        (((addr)+PAGE_SIZE-1)&PAGE_MASK)
+
+/*
+ * This handles the memory map.. We could make this a config
+ * option, but too many people screw it up, and too few need
+ * it.
+ *
+ * A __PAGE_OFFSET of 0xC0000000 means that the kernel has
+ * a virtual address space of one gigabyte, which limits the
+ * amount of physical memory you can use to about 950MB. 
+ *
+ * If you want more physical memory than this then see the CONFIG_HIGHMEM4G
+ * and CONFIG_HIGHMEM64G options in the kernel configuration.
+ */
+
+#ifndef __ASSEMBLY__
+
+struct vm_area_struct;
+
+/*
+ * This much address space is reserved for vmalloc() and iomap()
+ * as well as fixmap mappings.
+ */
+extern unsigned int __VMALLOC_RESERVE;
+
+extern int sysctl_legacy_va_layout;
+
+extern int page_is_ram(unsigned long pagenr);
+
+#endif /* __ASSEMBLY__ */
+
+#ifdef __ASSEMBLY__
+#define __PAGE_OFFSET           CONFIG_PAGE_OFFSET
+#else
+#define __PAGE_OFFSET           ((unsigned long)CONFIG_PAGE_OFFSET)
+#endif
+
+
+#define PAGE_OFFSET             ((unsigned long)__PAGE_OFFSET)
+#define VMALLOC_RESERVE         ((unsigned long)__VMALLOC_RESERVE)
+#define MAXMEM                  (-__PAGE_OFFSET-__VMALLOC_RESERVE)
+#define __pa(x)                 ((unsigned long)(x)-PAGE_OFFSET)
+/* __pa_symbol should be used for C visible symbols.
+   This seems to be the official gcc blessed way to do such arithmetic. */
+#define __pa_symbol(x)          __pa(RELOC_HIDE((unsigned long)(x),0))
+#define __va(x)                 ((void *)((unsigned long)(x)+PAGE_OFFSET))
+#define pfn_to_kaddr(pfn)      __va((pfn) << PAGE_SHIFT)
+#ifdef CONFIG_FLATMEM
+#define pfn_valid(pfn)          ((pfn) < max_mapnr)
+#endif /* CONFIG_FLATMEM */
+#define virt_to_page(kaddr)     pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
+
+#define virt_addr_valid(kaddr)  pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
+
+#define VM_DATA_DEFAULT_FLAGS \
+        (VM_READ | VM_WRITE | \
+        ((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \
+                 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+
+#include <asm-generic/memory_model.h>
+#include <asm-generic/page.h>
+
+#define __HAVE_ARCH_GATE_AREA 1
+#endif /* __KERNEL__ */
+
+#endif /* _I386_PAGE_H */