From e7c2a72e2680827d6a733931273a93461c0d8d1b Mon Sep 17 00:00:00 2001
From: Ralf Baechle <ralf@linux-mips.org>
Date: Tue, 14 Nov 1995 08:00:00 +0000
Subject: Import of Linux/MIPS 1.3.0

---
 include/asm-i386/page.h | 87 ++++++++++++++++++++++++++++++++-----------------
 1 file changed, 58 insertions(+), 29 deletions(-)

(limited to 'include/asm-i386/page.h')

diff --git a/include/asm-i386/page.h b/include/asm-i386/page.h
index 129848b04..7ab435bbf 100644
--- a/include/asm-i386/page.h
+++ b/include/asm-i386/page.h
@@ -1,40 +1,69 @@
 #ifndef _I386_PAGE_H
 #define _I386_PAGE_H
 
+/* PAGE_SHIFT determines the page size */
+#define PAGE_SHIFT	12
+#define PAGE_SIZE	(1UL << PAGE_SHIFT)
+#define PAGE_MASK	(~(PAGE_SIZE-1))
+
+#ifdef __KERNEL__
+
+#define CONFIG_STRICT_MM_TYPECHECKS
+
+#ifdef CONFIG_STRICT_MM_TYPECHECKS
+/*
+ * These are used to make use of C type-checking..
+ */
+typedef struct { unsigned long pte; } pte_t;
+typedef struct { unsigned long pmd; } pmd_t;
+typedef struct { unsigned long 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)
+#define pgprot_val(x)	((x).pgprot)
+
+#define __pte(x)	((pte_t) { (x) } )
+#define __pmd(x)	((pmd_t) { (x) } )
+#define __pgd(x)	((pgd_t) { (x) } )
+#define __pgprot(x)	((pgprot_t) { (x) } )
+
+#else
+/*
+ * .. while these make it easier on the compiler
+ */
+typedef unsigned long pte_t;
+typedef unsigned long pmd_t;
+typedef unsigned long 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)
+
+#endif
+
 #define invalidate() \
 __asm__ __volatile__("movl %%cr3,%%eax\n\tmovl %%eax,%%cr3": : :"ax")
 
-			/* PAGE_SHIFT determines the page size */
-#define PAGE_SHIFT			12
-#define PGDIR_SHIFT			22
-#define PAGE_SIZE			(1UL << PAGE_SHIFT)
-#define PGDIR_SIZE			(1UL << PGDIR_SHIFT)
+#define copy_page(from,to) memcpy((void *) to, (void *) from, PAGE_SIZE)
 
-#ifdef __KERNEL__
+/* to align the pointer to the (next) page boundary */
+#define PAGE_ALIGN(addr)	(((addr)+PAGE_SIZE-1)&PAGE_MASK)
+
+/* This handles the memory map.. */
+#define PAGE_OFFSET		0
+#define MAP_NR(addr)		(((unsigned long)(addr)) >> PAGE_SHIFT)
+#define MAP_PAGE_RESERVED	(1<<15)
 
-			/* number of bits that fit into a memory pointer */
-#define BITS_PER_PTR			(8*sizeof(unsigned long))
-			/* to mask away the intra-page address bits */
-#define PAGE_MASK			(~(PAGE_SIZE-1))
-			/* to mask away the intra-page address bits */
-#define PGDIR_MASK			(~(PGDIR_SIZE-1))
-			/* to align the pointer to the (next) page boundary */
-#define PAGE_ALIGN(addr)		(((addr)+PAGE_SIZE-1)&PAGE_MASK)
-			/* to align the pointer to a pointer address */
-#define PTR_MASK			(~(sizeof(void*)-1))
-
-					/* sizeof(void*)==1<<SIZEOF_PTR_LOG2 */
-					/* 64-bit machines, beware!  SRB. */
-#define SIZEOF_PTR_LOG2			2
-
-			/* to find an entry in a page-table-directory */
-#define PAGE_DIR_OFFSET(base,address)	((unsigned long*)((base)+\
-  ((unsigned long)(address)>>(PAGE_SHIFT-SIZEOF_PTR_LOG2)*2&PTR_MASK&~PAGE_MASK)))
-			/* to find an entry in a page-table */
-#define PAGE_PTR(address)		\
-  ((unsigned long)(address)>>(PAGE_SHIFT-SIZEOF_PTR_LOG2)&PTR_MASK&~PAGE_MASK)
-			/* the no. of pointers that fit on a page */
-#define PTRS_PER_PAGE			(PAGE_SIZE/sizeof(void*))
+typedef unsigned short mem_map_t;
 
 #endif /* __KERNEL__ */
 
-- 
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