patch-2_6_7-vs1_9_1_12

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

diff --git a/include/asm-parisc/page.h b/include/asm-parisc/page.h
index 7d848d2..54cc342 100644 (file)
--- a/include/asm-parisc/page.h
+++ b/include/asm-parisc/page.h
@@ -10,6 +10,7 @@
 #include <linux/config.h>
 #ifndef __ASSEMBLY__
 
+#include <asm/types.h>
 #include <asm/cache.h>
 
 #define clear_page(page)       memset((void *)(page), 0, PAGE_SIZE)
@@ -39,12 +40,26 @@ 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;
-typedef struct { unsigned long pmd; } pmd_t;
-typedef struct { unsigned long pgd; } pgd_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
 #define pmd_val(x)     ((x).pmd)
 #define pgd_val(x)     ((x).pgd)
 #define pgprot_val(x)  ((x).pgprot)
@@ -84,14 +99,43 @@ 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)