1 files changed, 136 insertions, 0 deletions

diff --git a/arch/x86/include/asm/page_32.h b/arch/x86/include/asm/page_32.h
new file mode 100644
index 000000000000..bdf5dba4cfb0
--- /dev/null
+++ b/arch/x86/include/asm/page_32.h
@@ -0,0 +1,136 @@
+#ifndef ASM_X86__PAGE_32_H
+#define ASM_X86__PAGE_32_H
+
+/*
+ * This handles the memory map.
+ *
+ * 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.
+ */
+#define __PAGE_OFFSET           _AC(CONFIG_PAGE_OFFSET, UL)
+
+#ifdef CONFIG_4KSTACKS
+#define THREAD_ORDER    0
+#else
+#define THREAD_ORDER    1
+#endif
+#define THREAD_SIZE     (PAGE_SIZE << THREAD_ORDER)
+
+#define STACKFAULT_STACK 0
+#define DOUBLEFAULT_STACK 1
+#define NMI_STACK 0
+#define DEBUG_STACK 0
+#define MCE_STACK 0
+#define N_EXCEPTION_STACKS 1
+
+#ifdef CONFIG_X86_PAE
+/* 44=32+12, the limit we can fit into an unsigned long pfn */
+#define __PHYSICAL_MASK_SHIFT   44
+#define __VIRTUAL_MASK_SHIFT    32
+#define PAGETABLE_LEVELS        3
+
+#ifndef __ASSEMBLY__
+typedef u64     pteval_t;
+typedef u64     pmdval_t;
+typedef u64     pudval_t;
+typedef u64     pgdval_t;
+typedef u64     pgprotval_t;
+
+typedef union {
+        struct {
+                unsigned long pte_low, pte_high;
+        };
+        pteval_t pte;
+} pte_t;
+#endif  /* __ASSEMBLY__
+ */
+#else  /* !CONFIG_X86_PAE */
+#define __PHYSICAL_MASK_SHIFT   32
+#define __VIRTUAL_MASK_SHIFT    32
+#define PAGETABLE_LEVELS        2
+
+#ifndef __ASSEMBLY__
+typedef unsigned long   pteval_t;
+typedef unsigned long   pmdval_t;
+typedef unsigned long   pudval_t;
+typedef unsigned long   pgdval_t;
+typedef unsigned long   pgprotval_t;
+
+typedef union {
+        pteval_t pte;
+        pteval_t pte_low;
+} pte_t;
+
+#endif  /* __ASSEMBLY__ */
+#endif  /* CONFIG_X86_PAE */
+
+#ifndef __ASSEMBLY__
+typedef struct page *pgtable_t;
+#endif
+
+#ifdef CONFIG_HUGETLB_PAGE
+#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
+#endif
+
+#ifndef __ASSEMBLY__
+#define __phys_addr_nodebug(x)  ((x) - PAGE_OFFSET)
+#ifdef CONFIG_DEBUG_VIRTUAL
+extern unsigned long __phys_addr(unsigned long);
+#else
+#define __phys_addr(x)          __phys_addr_nodebug(x)
+#endif
+#define __phys_reloc_hide(x)    RELOC_HIDE((x), 0)
+
+#ifdef CONFIG_FLATMEM
+#define pfn_valid(pfn)          ((pfn) < max_mapnr)
+#endif /* CONFIG_FLATMEM */
+
+extern int nx_enabled;
+
+/*
+ * 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 void find_low_pfn_range(void);
+extern unsigned long init_memory_mapping(unsigned long start,
+                                         unsigned long end);
+extern void initmem_init(unsigned long, unsigned long);
+extern void free_initmem(void);
+extern void setup_bootmem_allocator(void);
+
+
+#ifdef CONFIG_X86_USE_3DNOW
+#include <asm/mmx.h>
+
+static inline void clear_page(void *page)
+{
+        mmx_clear_page(page);
+}
+
+static inline void copy_page(void *to, void *from)
+{
+        mmx_copy_page(to, from);
+}
+#else  /* !CONFIG_X86_USE_3DNOW */
+#include <linux/string.h>
+
+static inline void clear_page(void *page)
+{
+        memset(page, 0, PAGE_SIZE);
+}
+
+static inline void copy_page(void *to, void *from)
+{
+        memcpy(to, from, PAGE_SIZE);
+}
+#endif  /* CONFIG_X86_3DNOW */
+#endif  /* !__ASSEMBLY__ */
+
+#endif /* ASM_X86__PAGE_32_H */