X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Fasm-parisc%2Fpage.h;h=4a12692f94b4659c5d10769416cddebb34421f88;hb=9bf4aaab3e101692164d49b7ca357651eb691cb6;hp=7d848d2721c2f7554d2f0f6ddf7af221c3b735e5;hpb=5273a3df6485dc2ad6aa7ddd441b9a21970f003b;p=linux-2.6.git

diff --git a/include/asm-parisc/page.h b/include/asm-parisc/page.h
index 7d848d272..4a12692f9 100644
--- 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)
@@ -39,16 +40,35 @@ 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)
-#define pmd_val(x)	((x).pmd)
-#define pgd_val(x)	((x).pgd)
+#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) } )
@@ -68,12 +88,6 @@ extern __inline__ int get_order(unsigned long size)
 	return order;
 }
 
-#ifdef __LP64__
-#define MAX_PHYSMEM_RANGES 8 /* Fix the size for now (current known max is 3) */
-#else
-#define MAX_PHYSMEM_RANGES 1 /* First range is only range that fits in 32 bits */
-#endif
-
 typedef struct __physmem_range {
 	unsigned long start_pfn;
 	unsigned long pages;       /* PAGE_SIZE pages */
@@ -84,14 +98,43 @@ 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)
@@ -100,15 +143,16 @@ extern int npmem_ranges;
 #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)
 
-#ifndef CONFIG_DISCONTIGMEM
-#define virt_to_page(kaddr)     (mem_map + (__pa(kaddr) >> PAGE_SHIFT))
-#define VALID_PAGE(page)	((page - mem_map) < max_mapnr)
-#endif  /* !CONFIG_DISCONTIGMEM */
+#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)