X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Fasm-um%2Fpage.h;h=459311435857d01faf76979007c2376b01ed166e;hb=4e76c8a9fa413ccc09d3f7f664183dcce3555d57;hp=ad97bc0a613531e73e724ca69e607a2d834255ec;hpb=5273a3df6485dc2ad6aa7ddd441b9a21970f003b;p=linux-2.6.git

diff --git a/include/asm-um/page.h b/include/asm-um/page.h
index ad97bc0a6..459311435 100644
--- a/include/asm-um/page.h
+++ b/include/asm-um/page.h
@@ -1,21 +1,93 @@
+/*
+ * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
+ * Copyright 2003 PathScale, Inc.
+ * Licensed under the GPL
+ */
+
 #ifndef __UM_PAGE_H
 #define __UM_PAGE_H
 
 struct page;
 
-#include "asm/arch/page.h"
-#include "asm/bug.h"
+#include <linux/config.h>
+#include <asm/vm-flags.h>
+
+/* 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
 
-#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
+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;
 
@@ -24,25 +96,30 @@ extern unsigned long uml_physmem;
 
 #define __va_space (8*1024*1024)
 
-extern unsigned long region_pa(void *virt);
-extern void *region_va(unsigned long phys);
+#include "mem.h"
 
-#define __pa(virt) region_pa((void *) (virt))
-#define __va(phys) region_va((unsigned long) (phys))
+/* 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))
 
-extern unsigned long page_to_pfn(struct page *page);
-extern struct page *pfn_to_page(unsigned long pfn);
+#define phys_to_pfn(p) ((p) >> PAGE_SHIFT)
+#define pfn_to_phys(pfn) ((pfn) << PAGE_SHIFT)
 
-extern struct page *phys_to_page(unsigned long phys);
+#define pfn_valid(pfn) ((pfn) < max_mapnr)
+#define virt_addr_valid(v) pfn_valid(phys_to_pfn(__pa(v)))
 
-#define virt_to_page(v) (phys_to_page(__pa(v)))
-
-extern struct page *page_mem_map(struct page *page);
+extern struct page *arch_validate(struct page *page, gfp_t mask, int order);
+#define HAVE_ARCH_VALIDATE
+#define devmem_is_allowed(x) 1
 
-#define pfn_valid(pfn) (page_mem_map(pfn_to_page(pfn)) != NULL)
-#define virt_addr_valid(v) pfn_valid(__pa(v) >> PAGE_SHIFT)
+extern int arch_free_page(struct page *page, int order);
+#define HAVE_ARCH_FREE_PAGE
 
-extern struct page *arch_validate(struct page *page, int mask, int order);
-#define HAVE_ARCH_VALIDATE
+#include <asm-generic/memory_model.h>
+#include <asm-generic/page.h>
 
 #endif