1 files changed, 173 insertions, 0 deletions

diff --git a/arch/parisc/include/asm/page.h b/arch/parisc/include/asm/page.h
new file mode 100644
index 000000000000..c3941f09a878
--- /dev/null
+++ b/arch/parisc/include/asm/page.h
@@ -0,0 +1,173 @@
+#ifndef _PARISC_PAGE_H
+#define _PARISC_PAGE_H
+
+#include <linux/const.h>
+
+#if defined(CONFIG_PARISC_PAGE_SIZE_4KB)
+# define PAGE_SHIFT     12
+#elif defined(CONFIG_PARISC_PAGE_SIZE_16KB)
+# define PAGE_SHIFT     14
+#elif defined(CONFIG_PARISC_PAGE_SIZE_64KB)
+# define PAGE_SHIFT     16
+#else
+# error "unknown default kernel page size"
+#endif
+#define PAGE_SIZE       (_AC(1,UL) << PAGE_SHIFT)
+#define PAGE_MASK       (~(PAGE_SIZE-1))
+
+
+#ifndef __ASSEMBLY__
+
+#include <asm/types.h>
+#include <asm/cache.h>
+
+#define clear_page(page)        memset((void *)(page), 0, PAGE_SIZE)
+#define copy_page(to,from)      copy_user_page_asm((void *)(to), (void *)(from))
+
+struct page;
+
+void copy_user_page_asm(void *to, void *from);
+void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
+                           struct page *pg);
+void clear_user_page(void *page, unsigned long vaddr, struct page *pg);
+
+/*
+ * These are used to make use of C type-checking..
+ */
+#define STRICT_MM_TYPECHECKS
+#ifdef STRICT_MM_TYPECHECKS
+typedef struct { unsigned long pte;
+#if !defined(CONFIG_64BIT)
+                 unsigned long future_flags;
+ /* XXX: it's possible to remove future_flags and change BITS_PER_PTE_ENTRY
+         to 2, but then strangely the identical 32bit kernel boots on a
+         c3000(pa20), but not any longer on a 715(pa11).
+         Still investigating... HelgeD.
+  */
+#endif
+} pte_t; /* either 32 or 64bit */
+
+/* NOTE: even on 64 bits, these entries are __u32 because we allocate
+ * the pmd and pgd in ZONE_DMA (i.e. under 4GB) */
+typedef struct { __u32 pmd; } pmd_t;
+typedef struct { __u32 pgd; } pgd_t;
+typedef struct { unsigned long pgprot; } pgprot_t;
+
+#define pte_val(x)      ((x).pte)
+/* These do not work lvalues, so make sure we don't use them as such. */
+#define pmd_val(x)      ((x).pmd + 0)
+#define pgd_val(x)      ((x).pgd + 0)
+#define pgprot_val(x)   ((x).pgprot)
+
+#define __pte(x)        ((pte_t) { (x) } )
+#define __pmd(x)        ((pmd_t) { (x) } )
+#define __pgd(x)        ((pgd_t) { (x) } )
+#define __pgprot(x)     ((pgprot_t) { (x) } )
+
+#define __pmd_val_set(x,n) (x).pmd = (n)
+#define __pgd_val_set(x,n) (x).pgd = (n)
+
+#else
+/*
+ * .. while these make it easier on the compiler
+ */
+typedef unsigned long pte_t;
+typedef         __u32 pmd_t;
+typedef         __u32 pgd_t;
+typedef unsigned long pgprot_t;
+
+#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 __pmd(x)        (x)
+#define __pgd(x)        (x)
+#define __pgprot(x)     (x)
+
+#define __pmd_val_set(x,n) (x) = (n)
+#define __pgd_val_set(x,n) (x) = (n)
+
+#endif /* STRICT_MM_TYPECHECKS */
+
+typedef struct page *pgtable_t;
+
+typedef struct __physmem_range {
+        unsigned long start_pfn;
+        unsigned long pages;       /* PAGE_SIZE pages */
+} physmem_range_t;
+
+extern physmem_range_t pmem_ranges[];
+extern int npmem_ranges;
+
+#endif /* !__ASSEMBLY__ */
+
+/* WARNING: The definitions below must match exactly to sizeof(pte_t)
+ * etc
+ */
+#ifdef CONFIG_64BIT
+#define BITS_PER_PTE_ENTRY      3
+#define BITS_PER_PMD_ENTRY      2
+#define BITS_PER_PGD_ENTRY      2
+#else
+#define BITS_PER_PTE_ENTRY      3
+#define BITS_PER_PMD_ENTRY      2
+#define BITS_PER_PGD_ENTRY      BITS_PER_PMD_ENTRY
+#endif
+#define PGD_ENTRY_SIZE  (1UL << BITS_PER_PGD_ENTRY)
+#define PMD_ENTRY_SIZE  (1UL << BITS_PER_PMD_ENTRY)
+#define PTE_ENTRY_SIZE  (1UL << BITS_PER_PTE_ENTRY)
+
+#define LINUX_GATEWAY_SPACE     0
+
+/* This governs the relationship between virtual and physical addresses.
+ * If you alter it, make sure to take care of our various fixed mapping
+ * segments in fixmap.h */
+#ifdef CONFIG_64BIT
+#define __PAGE_OFFSET   (0x40000000)    /* 1GB */
+#else
+#define __PAGE_OFFSET   (0x10000000)    /* 256MB */
+#endif
+
+#define PAGE_OFFSET             ((unsigned long)__PAGE_OFFSET)
+
+/* The size of the gateway page (we leave lots of room for expansion) */
+#define GATEWAY_PAGE_SIZE       0x4000
+
+/* The start of the actual kernel binary---used in vmlinux.lds.S
+ * Leave some space after __PAGE_OFFSET for detecting kernel null
+ * ptr derefs */
+#define KERNEL_BINARY_TEXT_START        (__PAGE_OFFSET + 0x100000)
+
+/* These macros don't work for 64-bit C code -- don't allow in C at all */
+#ifdef __ASSEMBLY__
+#   define PA(x)        ((x)-__PAGE_OFFSET)
+#   define VA(x)        ((x)+__PAGE_OFFSET)
+#endif
+#define __pa(x)                 ((unsigned long)(x)-PAGE_OFFSET)
+#define __va(x)                 ((void *)((unsigned long)(x)+PAGE_OFFSET))
+
+#ifndef CONFIG_DISCONTIGMEM
+#define pfn_valid(pfn)          ((pfn) < max_mapnr)
+#endif /* CONFIG_DISCONTIGMEM */
+
+#ifdef CONFIG_HUGETLB_PAGE
+#define HPAGE_SHIFT             22      /* 4MB (is this fixed?) */
+#define HPAGE_SIZE              ((1UL) << HPAGE_SHIFT)
+#define HPAGE_MASK              (~(HPAGE_SIZE - 1))
+#define HUGETLB_PAGE_ORDER      (HPAGE_SHIFT - PAGE_SHIFT)
+#endif
+
+#define virt_addr_valid(kaddr)  pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
+
+#define page_to_phys(page)      (page_to_pfn(page) << PAGE_SHIFT)
+#define virt_to_page(kaddr)     pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
+
+#define VM_DATA_DEFAULT_FLAGS   (VM_READ | VM_WRITE | VM_EXEC | \
+                                 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+
+#include <asm-generic/memory_model.h>
+#include <asm-generic/page.h>
+
+#endif /* _PARISC_PAGE_H */