fedora core 6 1.2949 + vserver 2.2.0

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

diff --git a/include/asm-um/page.h b/include/asm-um/page.h
index f69b0f1..b5b65d4 100644 (file)
--- a/include/asm-um/page.h
+++ b/include/asm-um/page.h
@@ -1,5 +1,6 @@
 /*
- *  Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
+ * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
+ * Copyright 2003 PathScale, Inc.
  * Licensed under the GPL
  */
 
@@ -8,18 +9,84 @@
 
 struct page;
 
-#include "asm/arch/page.h"
+#include <asm/vm-flags.h>
 
-#undef __pa
-#undef __va
-#undef pfn_to_page
-#undef page_to_pfn
-#undef virt_to_page
-#undef pfn_valid
-#undef virt_addr_valid
-#undef VALID_PAGE
-#undef PAGE_OFFSET
-#undef KERNELBASE
+/* PAGE_SHIFT determines the page size */
+#define PAGE_SHIFT     12
+#define PAGE_SIZE      (1UL << PAGE_SHIFT)
+#define PAGE_MASK      (~(PAGE_SIZE-1))
+
+/*
+ * These are used to make use of C type-checking..
+ */
+
+#define clear_page(page)       memset((void *)(page), 0, PAGE_SIZE)
+#define copy_page(to,from)     memcpy((void *)(to), (void *)(from), PAGE_SIZE)
+
+#define clear_user_page(page, vaddr, pg)       clear_page(page)
+#define copy_user_page(to, from, vaddr, pg)    copy_page(to, from)
+
+#if defined(CONFIG_3_LEVEL_PGTABLES) && !defined(CONFIG_64BIT)
+
+typedef struct { unsigned long pte_low, pte_high; } pte_t;
+typedef struct { unsigned long long pmd; } pmd_t;
+typedef struct { unsigned long pgd; } pgd_t;
+#define pte_val(x) ((x).pte_low | ((unsigned long long) (x).pte_high << 32))
+
+#define pte_get_bits(pte, bits) ((pte).pte_low & (bits))
+#define pte_set_bits(pte, bits) ((pte).pte_low |= (bits))
+#define pte_clear_bits(pte, bits) ((pte).pte_low &= ~(bits))
+#define pte_copy(to, from) ({ (to).pte_high = (from).pte_high; \
+                             smp_wmb(); \
+                             (to).pte_low = (from).pte_low; })
+#define pte_is_zero(pte) (!((pte).pte_low & ~_PAGE_NEWPAGE) && !(pte).pte_high)
+#define pte_set_val(pte, phys, prot) \
+       ({ (pte).pte_high = (phys) >> 32; \
+          (pte).pte_low = (phys) | pgprot_val(prot); })
+
+#define pmd_val(x)     ((x).pmd)
+#define __pmd(x) ((pmd_t) { (x) } )
+
+typedef unsigned long long pfn_t;
+typedef unsigned long long phys_t;
+
+#else
+
+typedef struct { unsigned long pte; } pte_t;
+typedef struct { unsigned long pgd; } pgd_t;
+
+#ifdef CONFIG_3_LEVEL_PGTABLES
+typedef struct { unsigned long pmd; } pmd_t;
+#define pmd_val(x)     ((x).pmd)
+#define __pmd(x) ((pmd_t) { (x) } )
+#endif
+
+#define pte_val(x)     ((x).pte)
+
+
+#define pte_get_bits(p, bits) ((p).pte & (bits))
+#define pte_set_bits(p, bits) ((p).pte |= (bits))
+#define pte_clear_bits(p, bits) ((p).pte &= ~(bits))
+#define pte_copy(to, from) ((to).pte = (from).pte)
+#define pte_is_zero(p) (!((p).pte & ~_PAGE_NEWPAGE))
+#define pte_set_val(p, phys, prot) (p).pte = (phys | pgprot_val(prot))
+
+typedef unsigned long pfn_t;
+typedef unsigned long phys_t;
+
+#endif
+
+typedef struct { unsigned long pgprot; } pgprot_t;
+
+#define pgd_val(x)     ((x).pgd)
+#define pgprot_val(x)  ((x).pgprot)
+
+#define __pte(x) ((pte_t) { (x) } )
+#define __pgd(x) ((pgd_t) { (x) } )
+#define __pgprot(x)    ((pgprot_t) { (x) } )
+
+/* to align the pointer to the (next) page boundary */
+#define PAGE_ALIGN(addr)       (((addr)+PAGE_SIZE-1)&PAGE_MASK)
 
 extern unsigned long uml_physmem;
 
@@ -28,25 +95,30 @@ extern unsigned long uml_physmem;
 
 #define __va_space (8*1024*1024)
 
-extern unsigned long to_phys(void *virt);
-extern void *to_virt(unsigned long phys);
-
-#define __pa(virt) to_phys((void *) virt)
-#define __va(phys) to_virt((unsigned long) phys)
+#include "mem.h"
 
-#define page_to_pfn(page) ((page) - mem_map)
-#define pfn_to_page(pfn) (mem_map + (pfn))
+/* Cast to unsigned long before casting to void * to avoid a warning from
+ * mmap_kmem about cutting a long long down to a void *.  Not sure that
+ * casting is the right thing, but 32-bit UML can't have 64-bit virtual
+ * addresses
+ */
+#define __pa(virt) to_phys((void *) (unsigned long) (virt))
+#define __va(phys) to_virt((unsigned long) (phys))
 
 #define phys_to_pfn(p) ((p) >> PAGE_SHIFT)
 #define pfn_to_phys(pfn) ((pfn) << PAGE_SHIFT)
 
 #define pfn_valid(pfn) ((pfn) < max_mapnr)
 #define virt_addr_valid(v) pfn_valid(phys_to_pfn(__pa(v)))
-  
-extern struct page *arch_validate(struct page *page, int mask, int order);
+
+extern struct page *arch_validate(struct page *page, gfp_t mask, int order);
 #define HAVE_ARCH_VALIDATE
+#define devmem_is_allowed(x) 1
 
-extern void arch_free_page(struct page *page, int order);
+extern int arch_free_page(struct page *page, int order);
 #define HAVE_ARCH_FREE_PAGE
 
+#include <asm-generic/memory_model.h>
+#include <asm-generic/page.h>
+
 #endif