patch-1.3.94 linux/include/asm-m68k/page.h

• Lines: 73
• Date: Sat Mar 23 22:26:13 1996
• Orig file: v1.3.93/linux/include/asm-m68k/page.h
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v1.3.93/linux/include/asm-m68k/page.h linux/include/asm-m68k/page.h
@@ -0,0 +1,72 @@
+#ifndef _M68K_PAGE_H
+#define _M68K_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 STRICT_MM_TYPECHECKS
+
+#ifdef 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[16]; } 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[0])
+#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 struct { unsigned long pmd[16]; } pmd_t;
+typedef unsigned long pgd_t;
+typedef unsigned long pgprot_t;
+
+#define pte_val(x)	(x)
+#define pmd_val(x)	((&x)->pmd[0])
+#define pgd_val(x)	(x)
+#define pgprot_val(x)	(x)
+
+#define __pte(x)	(x)
+#define __pmd(x)	((pmd_t) { (x) } )
+#define __pgd(x)	(x)
+#define __pgprot(x)	(x)
+
+#endif
+
+/* m68k_is040or060 is != 0 for a '040 or higher; used numbers are 4 for 68040
+ * and 6 for 68060 */
+extern int m68k_is040or060;
+
+/* This is the cache mode to be used for pages containing page descriptors for
+ * processors >= '040. It is in pte_mknocache(), and the variable is defined
+ * and initialized in head.S */
+extern int m68k_pgtable_cachemode;
+
+/* 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)
+
+#endif /* __KERNEL__ */
+
+#endif /* _M68K_PAGE_H */