patch-2.3.48 linux/include/asm-mips64/page.h

• Lines: 77
• Date: Thu Feb 24 22:53:35 2000
• Orig file: v2.3.47/linux/include/asm-mips64/page.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.47/linux/include/asm-mips64/page.h linux/include/asm-mips64/page.h
@@ -0,0 +1,76 @@
+/* $Id: page.h,v 1.6 2000/02/24 00:13:20 ralf Exp $
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1994 - 1999 by Ralf Baechle
+ * Copyright (C) 1999 Silicon Graphics, Inc.
+ */
+#ifndef _ASM_PAGE_H
+#define _ASM_PAGE_H
+
+#include <linux/config.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 _LANGUAGE_ASSEMBLY
+
+#define BUG() do { printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__); *(int *)0=0; } while (0)
+#define PAGE_BUG(page) do {  BUG(); } while (0)
+
+extern void (*_clear_page)(void * page);
+extern void (*_copy_page)(void * to, void * from);
+
+#define clear_page(page)	_clear_page(page)
+#define copy_page(to, from)	_copy_page(to, from)
+
+/*
+ * 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 __pme(x)	((pme_t) { (x) } )
+#define __pgd(x)	((pgd_t) { (x) } )
+#define __pgprot(x)	((pgprot_t) { (x) } )
+
+#endif /* _LANGUAGE_ASSEMBLY */
+
+/* to align the pointer to the (next) page boundary */
+#define PAGE_ALIGN(addr)	(((addr)+PAGE_SIZE-1)&PAGE_MASK)
+
+/*
+ * This handles the memory map.
+ * We handle pages at KSEG0 for kernels with upto 512mb of memory,
+ * at XKPHYS for kernels with more than that.
+ */
+#ifdef CONFIG_SGI_IP22
+#define PAGE_OFFSET	0xffffffff80000000UL
+#endif
+#ifdef CONFIG_SGI_IP27
+#define PAGE_OFFSET	0xa800000000000000UL
+#endif
+
+#define __pa(x)		((unsigned long) (x) - PAGE_OFFSET)
+#define __va(x)		((void *)((unsigned long) (x) + PAGE_OFFSET))
+#ifndef CONFIG_DISCONTIGMEM
+#define MAP_NR(addr)	(__pa(addr) >> PAGE_SHIFT)
+#endif
+
+#endif /* defined (__KERNEL__) */
+
+#endif /* _ASM_PAGE_H */