patch-2.4.20 linux-2.4.20/include/asm-x86_64/page.h

• Lines: 144
• Date: Thu Nov 28 15:53:15 2002
• Orig file: linux-2.4.19/include/asm-x86_64/page.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.19/include/asm-x86_64/page.h linux-2.4.20/include/asm-x86_64/page.h
@@ -0,0 +1,143 @@
+#ifndef _X86_64_PAGE_H
+#define _X86_64_PAGE_H
+
+/* PAGE_SHIFT determines the page size */
+#define PAGE_SHIFT	12
+#ifdef __ASSEMBLY__
+#define PAGE_SIZE	(0x1 << PAGE_SHIFT)
+#else
+#define PAGE_SIZE	(1UL << PAGE_SHIFT)
+#endif
+#define PAGE_MASK	(~(PAGE_SIZE-1))
+
+#define __PHYSICAL_MASK		0x0000ffffffffffffUL
+#define PHYSICAL_PAGE_MASK	0x0000fffffffff000UL
+
+#define LARGE_PAGE_MASK (~(LARGE_PAGE_SIZE-1))
+#define LARGE_PAGE_SIZE (1UL << PMD_SHIFT)
+
+#define LARGE_PFN	(LARGE_PAGE_SIZE / PAGE_SIZE)
+
+#define KERNEL_TEXT_SIZE  (40UL*1024*1024)
+#define KERNEL_TEXT_START 0xffffffff80000000UL 
+
+/* Changing the next two defines should be enough to increase the kernel stack */
+/* We still hope 8K is enough, but ... */
+#define THREAD_ORDER    1
+#define THREAD_SIZE    (2*PAGE_SIZE)
+
+#define INIT_TASK_SIZE THREAD_SIZE
+#define CURRENT_MASK (~(THREAD_SIZE-1))
+
+#ifdef __KERNEL__
+#ifndef __ASSEMBLY__
+
+void clear_page(void *);
+void copy_page(void *, void *); 
+
+#define clear_user_page(page, vaddr)	clear_page(page)
+#define copy_user_page(to, from, vaddr)	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 pml4; } pml4_t;
+#define PTE_MASK	PAGE_MASK
+
+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 pml4_val(x)	((x).pml4)
+#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 __level4(x) ((level4_t) { (x) } )
+#define __pgprot(x)	((pgprot_t) { (x) } )
+ 
+#endif /* !__ASSEMBLY__ */
+
+/* to align the pointer to the (next) page boundary */
+#define PAGE_ALIGN(addr)	(((addr)+PAGE_SIZE-1)&PAGE_MASK)
+
+/* See Documentation/X86_64/mm.txt for a description of the layout. */
+#define __START_KERNEL		0xffffffff80100000
+#define __START_KERNEL_map	0xffffffff80000000
+#define __PAGE_OFFSET           0x0000010000000000
+
+#ifndef __ASSEMBLY__
+
+#include <linux/config.h>
+#include <linux/stringify.h>
+
+
+/*
+ * Tell the user there is some problem.  The exception handler decodes this frame.
+ */
+struct bug_frame { 
+       unsigned char ud2[2];          
+       char *filename;    /* should use 32bit offset instead, but the assembler doesn't like it */ 
+       unsigned short line; 
+} __attribute__((packed)); 
+#define BUG() asm volatile("ud2 ; .quad %c1 ; .short %c0" :: "i"(__LINE__), \
+		"i" (__stringify(KBUILD_BASENAME)))
+#define HEADER_BUG() asm volatile("ud2 ; .quad %c1 ; .short %c0" :: "i"(__LINE__), \
+		"i" (__stringify(__FILE__)))
+#define PAGE_BUG(page) BUG()
+
+/* 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;
+}
+
+#endif /* __ASSEMBLY__ */
+
+#define PAGE_OFFSET		((unsigned long)__PAGE_OFFSET)
+
+/* Note: __pa(&symbol_visible_to_c) should be always replaced with __pa_symbol.
+   Otherwise you risk miscompilation. */ 
+#define __pa(x)			(((unsigned long)(x)>=__START_KERNEL_map)?(unsigned long)(x) - (unsigned long)__START_KERNEL_map:(unsigned long)(x) - PAGE_OFFSET)
+/* __pa_symbol should use for C visible symbols, but only for them. 
+   This seems to be the official gcc blessed way to do such arithmetic. */ 
+#define __pa_symbol(x)		\
+	({unsigned long v;  \
+	  asm("" : "=r" (v) : "0" (x)); \
+	 v - __START_KERNEL_map; })
+#define __pa_maybe_symbol(x)		\
+	({unsigned long v;  \
+	  asm("" : "=r" (v) : "0" (x)); \
+	  __pa(v); })
+
+#define __va(x)			((void *)((unsigned long)(x)+PAGE_OFFSET))
+#ifndef CONFIG_DISCONTIGMEM
+#define virt_to_page(kaddr)	(mem_map + (__pa(kaddr) >> PAGE_SHIFT))
+#define pfn_to_page(pfn)	(mem_map + (pfn)) 
+#define page_to_pfn(page)   ((page) - mem_map)
+#define page_to_phys(page)	(((page) - mem_map) << PAGE_SHIFT)
+#define VALID_PAGE(page)	(((page) - mem_map) < max_mapnr)
+#endif
+
+#define phys_to_pfn(phys)	((phys) >> PAGE_SHIFT)
+
+
+#define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | VM_EXEC | \
+				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+
+#endif /* __KERNEL__ */
+
+#endif /* _X86_64_PAGE_H */