1 files changed, 162 insertions, 0 deletions

diff --git a/include/asm-parisc/page.h b/include/asm-parisc/page.h
new file mode 100644
index 000000000000..4a12692f94b4
--- /dev/null
+++ b/include/asm-parisc/page.h
@@ -0,0 +1,162 @@
+#ifndef _PARISC_PAGE_H
+#define _PARISC_PAGE_H
+
+/* PAGE_SHIFT determines the page size */
+#define PAGE_SHIFT      12
+#define PAGE_SIZE       (1UL << PAGE_SHIFT)
+#define PAGE_MASK       (~(PAGE_SIZE-1))
+
+#ifdef __KERNEL__
+#include <linux/config.h>
+#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;
+
+extern void purge_kernel_dcache_page(unsigned long);
+extern void copy_user_page_asm(void *to, void *from);
+extern void clear_user_page_asm(void *page, unsigned long vaddr);
+
+static inline void
+copy_user_page(void *vto, void *vfrom, unsigned long vaddr, struct page *pg)
+{
+        copy_user_page_asm(vto, vfrom);
+        flush_kernel_dcache_page(vto);
+        /* XXX: ppc flushes icache too, should we? */
+}
+
+static inline void
+clear_user_page(void *page, unsigned long vaddr, struct page *pg)
+{
+        purge_kernel_dcache_page((unsigned long)page);
+        clear_user_page_asm(page, vaddr);
+}
+
+/*
+ * These are used to make use of C type-checking..
+ */
+#ifdef __LP64__
+typedef struct { unsigned long pte; } pte_t;
+#else
+typedef struct {
+        unsigned long pte;
+        unsigned long flags;
+} pte_t;
+#endif
+/* 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)
+#ifdef __LP64__
+#define pte_flags(x)    (*(__u32 *)&((x).pte))
+#else
+#define pte_flags(x)    ((x).flags)
+#endif
+
+/* 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 __pmd_val_set(x,n) (x).pmd = (n)
+#define __pgd_val_set(x,n) (x).pgd = (n)
+
+#define __pte(x)        ((pte_t) { (x) } )
+#define __pmd(x)        ((pmd_t) { (x) } )
+#define __pgd(x)        ((pgd_t) { (x) } )
+#define __pgprot(x)     ((pgprot_t) { (x) } )
+
+/* Pure 2^n version of get_order */
+extern __inline__ int get_order(unsigned long size)
+{
+        int order;
+
+        size = (size-1) >> (PAGE_SHIFT-1);
+        order = -1;
+        do {
+                size >>= 1;
+                order++;
+        } while (size);
+        return order;
+}
+
+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 __LP64__
+#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)
+
+/* to align the pointer to the (next) page boundary */
+#define PAGE_ALIGN(addr)        (((addr)+PAGE_SIZE-1)&PAGE_MASK)
+
+
+#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 */
+#define __PAGE_OFFSET           (0x10000000)
+
+#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_to_page(pfn)        (mem_map + (pfn))
+#define page_to_pfn(page)       ((unsigned long)((page) - mem_map))
+#define pfn_valid(pfn)          ((pfn) < max_mapnr)
+#endif /* CONFIG_DISCONTIGMEM */
+
+#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)
+
+#endif /* __KERNEL__ */
+
+#endif /* _PARISC_PAGE_H */