patch-2.3.99-pre8 linux/include/asm-s390/page.h

• Lines: 121
• Date: Fri May 12 11:41:44 2000
• Orig file: v2.3.99-pre7/linux/include/asm-s390/page.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.99-pre7/linux/include/asm-s390/page.h linux/include/asm-s390/page.h
@@ -0,0 +1,120 @@
+/*
+ *  include/asm-s390/page.h
+ *
+ *  S390 version
+ *    Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ *    Author(s): Hartmut Penner (hp@de.ibm.com)
+ */
+
+#ifndef _S390_PAGE_H
+#define _S390_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__
+#ifndef __ASSEMBLY__
+
+#define STRICT_MM_TYPECHECKS
+
+#define BUG() do { \
+        printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__); \
+        __asm__ __volatile__(".word 0x0000"); \
+} while (0)                                       
+
+#define PAGE_BUG(page) do { \
+        BUG(); \
+} while (0)                      
+
+/* Pure 2^n version of get_order */
+extern __inline__ int get_order(unsigned long size)
+{
+        int order;
+
+        size = (size-1) >> (PAGE_SHIFT-1);
+        order = -1;
+        do {
+                size >>= 1;
+                order++;
+        } while (size);
+        return order;
+}
+
+/*
+ * gcc uses builtin, i.e. MVCLE for both operations
+ */
+
+#define clear_page(page)        memset((void *)(page), 0, PAGE_SIZE)
+#define copy_page(to,from)      memcpy((void *)(to), (void *)(from), PAGE_SIZE)
+
+#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 pgd0;
+        unsigned long pgd1;
+        unsigned long pgd2;
+        unsigned long pgd3;
+        } 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).pgd0)
+#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 struct {
+        unsigned long pgd0;
+        unsigned long pgd1;
+        unsigned long pgd2;
+        unsigned long pgd3;
+        } 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
+#endif                                 /* !__ASSEMBLY__                    */
+
+/* to align the pointer to the (next) page boundary */
+#define PAGE_ALIGN(addr)        (((addr)+PAGE_SIZE-1)&PAGE_MASK)
+
+/*
+ *
+ *
+ */
+
+#define __PAGE_OFFSET           (0x0)
+#define PAGE_OFFSET             ((unsigned long)__PAGE_OFFSET)
+#define __pa(x)                 ((unsigned long)(x)-PAGE_OFFSET)
+#define __va(x)                 ((void *)((unsigned long)(x)+PAGE_OFFSET))
+#define MAP_NR(addr)            (__pa(addr) >> PAGE_SHIFT)
+#define PHYSMAP_NR(addr)	((unsigned long)(addr) >> PAGE_SHIFT)
+
+#endif                                 /* __KERNEL__                       */
+
+#endif                                 /* _S390_PAGE_H                     */