patch-1.3.45 linux/include/asm-ppc/page.h

• Lines: 89
• Date: Sun Nov 26 10:48:54 1995
• Orig file: v1.3.44/linux/include/asm-ppc/page.h
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v1.3.44/linux/include/asm-ppc/page.h linux/include/asm-ppc/page.h
@@ -0,0 +1,88 @@
+#ifndef _PPC_PAGE_H
+#define _PPC_PAGE_H
+
+/* PAGE_SHIFT determines the page size */
+#define PAGE_SHIFT	12
+#define PAGE_SIZE	(1UL << PAGE_SHIFT)
+#define PAGE_MASK	(~(PAGE_SIZE-1))
+
+void invalidate(void);
+
+#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; } 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
+
+/* 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 KERNELBASE	0x90000000
+#define PAGE_OFFSET	KERNELBASE
+#define MAP_NR(addr)	((((unsigned long)addr) - PAGE_OFFSET) >> PAGE_SHIFT)
+#define MAP_PAGE_RESERVED	(1<<15)
+
+
+/*
+ * This used to be an unsigned short...
+ * 
+ *                         -- Cort
+ */
+/*typedef unsigned short mem_map_t;*/
+
+typedef struct {
+	unsigned count:30,
+		 dirty:1,
+		 reserved:1;
+} mem_map_t;
+
+/* Certain architectures need to do special things when pte's
+ * within a page table are directly modified.  Thus, the following
+ * hook is made available.
+ */
+#define set_pte(pteptr, pteval) ((*(pteptr)) = (pteval))
+
+
+#endif /* __KERNEL__ */
+
+#endif /* _PPC_PAGE_H */