ia64/xen-unstable

view linux-2.6-xen-sparse/include/asm-um/page.h @ 9296:f85bb99187bf

Update interface documentation to include sched_op_new hypercall
and clean up the style a bit. Also clean up the sched_op_new
description in the sched.h public header.

Signed-off-by: Keir Fraser <keir@xensource.com>
author kaf24@firebug.cl.cam.ac.uk
date Wed Mar 15 19:19:22 2006 +0100 (2006-03-15)
parents 5a63f675107c
children 4fad820a2233
line source
1 /*
2 * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
3 * Copyright 2003 PathScale, Inc.
4 * Licensed under the GPL
5 */
7 #ifndef __UM_PAGE_H
8 #define __UM_PAGE_H
10 struct page;
12 #include <linux/config.h>
13 #include <asm/vm-flags.h>
15 /* PAGE_SHIFT determines the page size */
16 #define PAGE_SHIFT 12
17 #define PAGE_SIZE (1UL << PAGE_SHIFT)
18 #define PAGE_MASK (~(PAGE_SIZE-1))
20 /*
21 * These are used to make use of C type-checking..
22 */
24 #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
25 #define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE)
27 #define clear_user_page(page, vaddr, pg) clear_page(page)
28 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
30 #if defined(CONFIG_3_LEVEL_PGTABLES) && !defined(CONFIG_64BIT)
32 typedef struct { unsigned long pte_low, pte_high; } pte_t;
33 typedef struct { unsigned long long pmd; } pmd_t;
34 typedef struct { unsigned long pgd; } pgd_t;
35 #define pte_val(x) ((x).pte_low | ((unsigned long long) (x).pte_high << 32))
37 #define pte_get_bits(pte, bits) ((pte).pte_low & (bits))
38 #define pte_set_bits(pte, bits) ((pte).pte_low |= (bits))
39 #define pte_clear_bits(pte, bits) ((pte).pte_low &= ~(bits))
40 #define pte_copy(to, from) ({ (to).pte_high = (from).pte_high; \
41 smp_wmb(); \
42 (to).pte_low = (from).pte_low; })
43 #define pte_is_zero(pte) (!((pte).pte_low & ~_PAGE_NEWPAGE) && !(pte).pte_high)
44 #define pte_set_val(pte, phys, prot) \
45 ({ (pte).pte_high = (phys) >> 32; \
46 (pte).pte_low = (phys) | pgprot_val(prot); })
48 #define pmd_val(x) ((x).pmd)
49 #define __pmd(x) ((pmd_t) { (x) } )
51 typedef unsigned long long pfn_t;
52 typedef unsigned long long phys_t;
54 #else
56 typedef struct { unsigned long pte; } pte_t;
57 typedef struct { unsigned long pgd; } pgd_t;
59 #ifdef CONFIG_3_LEVEL_PGTABLES
60 typedef struct { unsigned long pmd; } pmd_t;
61 #define pmd_val(x) ((x).pmd)
62 #define __pmd(x) ((pmd_t) { (x) } )
63 #endif
65 #define pte_val(x) ((x).pte)
68 #define pte_get_bits(p, bits) ((p).pte & (bits))
69 #define pte_set_bits(p, bits) ((p).pte |= (bits))
70 #define pte_clear_bits(p, bits) ((p).pte &= ~(bits))
71 #define pte_copy(to, from) ((to).pte = (from).pte)
72 #define pte_is_zero(p) (!((p).pte & ~_PAGE_NEWPAGE))
73 #define pte_set_val(p, phys, prot) (p).pte = (phys | pgprot_val(prot))
75 typedef unsigned long pfn_t;
76 typedef unsigned long phys_t;
78 #endif
80 typedef struct { unsigned long pgprot; } pgprot_t;
82 #define pgd_val(x) ((x).pgd)
83 #define pgprot_val(x) ((x).pgprot)
85 #define __pte(x) ((pte_t) { (x) } )
86 #define __pgd(x) ((pgd_t) { (x) } )
87 #define __pgprot(x) ((pgprot_t) { (x) } )
89 /* to align the pointer to the (next) page boundary */
90 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
92 extern unsigned long uml_physmem;
94 #define PAGE_OFFSET (uml_physmem)
95 #define KERNELBASE PAGE_OFFSET
97 #define __va_space (8*1024*1024)
99 #include "mem.h"
101 /* Cast to unsigned long before casting to void * to avoid a warning from
102 * mmap_kmem about cutting a long long down to a void *. Not sure that
103 * casting is the right thing, but 32-bit UML can't have 64-bit virtual
104 * addresses
105 */
106 #define __pa(virt) to_phys((void *) (unsigned long) (virt))
107 #define __va(phys) to_virt((unsigned long) (phys))
109 #define page_to_pfn(page) ((page) - mem_map)
110 #define pfn_to_page(pfn) (mem_map + (pfn))
112 #define phys_to_pfn(p) ((p) >> PAGE_SHIFT)
113 #define pfn_to_phys(pfn) ((pfn) << PAGE_SHIFT)
115 #define pfn_valid(pfn) ((pfn) < max_mapnr)
116 #define virt_addr_valid(v) pfn_valid(phys_to_pfn(__pa(v)))
118 extern struct page *arch_validate(struct page *page, gfp_t mask, int order);
119 #define HAVE_ARCH_VALIDATE
121 extern int arch_free_page(struct page *page, int order);
122 #define HAVE_ARCH_FREE_PAGE
124 #include <asm-generic/page.h>
126 #endif