ia64/linux-2.6.18-xen.hg

view include/asm-i386/page.h @ 452:c7ed6fe5dca0

kexec: dont initialise regions in reserve_memory()

There is no need to initialise efi_memmap_res and boot_param_res in
reserve_memory() for the initial xen domain as it is done in
machine_kexec_setup_resources() using values from the kexec hypercall.

Signed-off-by: Simon Horman <horms@verge.net.au>
author Keir Fraser <keir.fraser@citrix.com>
date Thu Feb 28 10:55:18 2008 +0000 (2008-02-28)
parents cb5094f46707
children
line source
1 #ifndef _I386_PAGE_H
2 #define _I386_PAGE_H
4 /* PAGE_SHIFT determines the page size */
5 #define PAGE_SHIFT 12
6 #define PAGE_SIZE (1UL << PAGE_SHIFT)
7 #define PAGE_MASK (~(PAGE_SIZE-1))
9 #define LARGE_PAGE_MASK (~(LARGE_PAGE_SIZE-1))
10 #define LARGE_PAGE_SIZE (1UL << PMD_SHIFT)
12 #ifdef __KERNEL__
13 #ifndef __ASSEMBLY__
16 #ifdef CONFIG_X86_USE_3DNOW
18 #include <asm/mmx.h>
20 #define clear_page(page) mmx_clear_page((void *)(page))
21 #define copy_page(to,from) mmx_copy_page(to,from)
23 #else
25 /*
26 * On older X86 processors it's not a win to use MMX here it seems.
27 * Maybe the K6-III ?
28 */
30 #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
31 #define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE)
33 #endif
35 #define clear_user_page(page, vaddr, pg) clear_page(page)
36 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
38 #define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr)
39 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
41 /*
42 * These are used to make use of C type-checking..
43 */
44 extern int nx_enabled;
45 #ifdef CONFIG_X86_PAE
46 extern unsigned long long __supported_pte_mask;
47 typedef struct { unsigned long pte_low, pte_high; } pte_t;
48 typedef struct { unsigned long long pmd; } pmd_t;
49 typedef struct { unsigned long long pgd; } pgd_t;
50 typedef struct { unsigned long long pgprot; } pgprot_t;
51 #define pmd_val(x) ((x).pmd)
52 #define pte_val(x) ((x).pte_low | ((unsigned long long)(x).pte_high << 32))
53 #define __pmd(x) ((pmd_t) { (x) } )
54 #define HPAGE_SHIFT 21
55 #else
56 typedef struct { unsigned long pte_low; } pte_t;
57 typedef struct { unsigned long pgd; } pgd_t;
58 typedef struct { unsigned long pgprot; } pgprot_t;
59 #define boot_pte_t pte_t /* or would you rather have a typedef */
60 #define pte_val(x) ((x).pte_low)
61 #define HPAGE_SHIFT 22
62 #endif
63 #define PTE_MASK PAGE_MASK
65 #ifdef CONFIG_HUGETLB_PAGE
66 #define HPAGE_SIZE ((1UL) << HPAGE_SHIFT)
67 #define HPAGE_MASK (~(HPAGE_SIZE - 1))
68 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
69 #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
70 #endif
72 #define pgd_val(x) ((x).pgd)
73 #define pgprot_val(x) ((x).pgprot)
75 #define __pte(x) ((pte_t) { (x) } )
76 #define __pgd(x) ((pgd_t) { (x) } )
77 #define __pgprot(x) ((pgprot_t) { (x) } )
79 #endif /* !__ASSEMBLY__ */
81 /* to align the pointer to the (next) page boundary */
82 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
84 /*
85 * This handles the memory map.. We could make this a config
86 * option, but too many people screw it up, and too few need
87 * it.
88 *
89 * A __PAGE_OFFSET of 0xC0000000 means that the kernel has
90 * a virtual address space of one gigabyte, which limits the
91 * amount of physical memory you can use to about 950MB.
92 *
93 * If you want more physical memory than this then see the CONFIG_HIGHMEM4G
94 * and CONFIG_HIGHMEM64G options in the kernel configuration.
95 */
97 #ifndef __ASSEMBLY__
99 struct vm_area_struct;
101 /*
102 * This much address space is reserved for vmalloc() and iomap()
103 * as well as fixmap mappings.
104 */
105 extern unsigned int __VMALLOC_RESERVE;
107 extern int sysctl_legacy_va_layout;
109 extern int page_is_ram(unsigned long pagenr);
111 #endif /* __ASSEMBLY__ */
113 #ifdef __ASSEMBLY__
114 #define __PAGE_OFFSET CONFIG_PAGE_OFFSET
115 #define __PHYSICAL_START CONFIG_PHYSICAL_START
116 #else
117 #define __PAGE_OFFSET ((unsigned long)CONFIG_PAGE_OFFSET)
118 #define __PHYSICAL_START ((unsigned long)CONFIG_PHYSICAL_START)
119 #endif
120 #define __KERNEL_START (__PAGE_OFFSET + __PHYSICAL_START)
123 #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
124 #define VMALLOC_RESERVE ((unsigned long)__VMALLOC_RESERVE)
125 #define MAXMEM (__FIXADDR_TOP-__PAGE_OFFSET-__VMALLOC_RESERVE)
126 #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
127 #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
128 #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
129 #ifdef CONFIG_FLATMEM
130 #define pfn_valid(pfn) ((pfn) < max_mapnr)
131 #endif /* CONFIG_FLATMEM */
132 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
134 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
136 #define VM_DATA_DEFAULT_FLAGS \
137 (VM_READ | VM_WRITE | \
138 ((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \
139 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
141 #include <asm-generic/memory_model.h>
142 #include <asm-generic/page.h>
144 #define __HAVE_ARCH_GATE_AREA 1
145 #endif /* __KERNEL__ */
147 #endif /* _I386_PAGE_H */