fedora core 6 1.2949 + vserver 2.2.0

[linux-2.6.git] / include / asm-parisc / page.h

diff --git a/include/asm-parisc/page.h b/include/asm-parisc/page.h
index 4a6752b..bc1c635 100644 (file)
--- a/include/asm-parisc/page.h
+++ b/include/asm-parisc/page.h
@@ -1,13 +1,21 @@
 #ifndef _PARISC_PAGE_H
 #define _PARISC_PAGE_H
 
-/* PAGE_SHIFT determines the page size */
-#define PAGE_SHIFT     12
+#ifdef __KERNEL__
+
+#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      (1UL << PAGE_SHIFT)
 #define PAGE_MASK      (~(PAGE_SIZE-1))
 
-#ifdef __KERNEL__
-#include <linux/config.h>
+
 #ifndef __ASSEMBLY__
 
 #include <asm/types.h>
@@ -18,36 +26,27 @@
 
 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);
-}
+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..
  */
-#ifdef __LP64__
-typedef struct { unsigned long pte; } pte_t;
-#else
-typedef struct {
-       unsigned long pte;
-       unsigned long flags;
-} pte_t;
+#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;
@@ -55,25 +54,44 @@ 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) } )
 
+#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 __physmem_range {
        unsigned long start_pfn;
        unsigned long pages;       /* PAGE_SIZE pages */
@@ -130,8 +148,6 @@ extern int npmem_ranges;
 #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 */
 
@@ -150,8 +166,11 @@ extern int npmem_ranges;
 #define VM_DATA_DEFAULT_FLAGS  (VM_READ | VM_WRITE | VM_EXEC | \
                                 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
 
-#endif /* __KERNEL__ */
-
+#include <asm-generic/memory_model.h>
 #include <asm-generic/page.h>
 
+#define devmem_is_allowed(x) 1
+
+#endif /* __KERNEL__ */
+
 #endif /* _PARISC_PAGE_H */