4 /* #include <linux/string.h> */
6 #include <linux/kernel.h>
7 #include <linux/types.h>
10 #include <xen/interface/xen.h>
11 #include <xen/foreign_page.h>
13 #define arch_free_page(_page,_order) \
14 ({ int foreign = PageForeign(_page); \
16 (PageForeignDestructor(_page))(_page); \
19 #define HAVE_ARCH_FREE_PAGE
21 #ifdef CONFIG_XEN_SCRUB_PAGES
22 #define scrub_pages(_p,_n) memset((void *)(_p), 0, (_n) << PAGE_SHIFT)
24 #define scrub_pages(_p,_n) ((void)0)
27 /* PAGE_SHIFT determines the page size */
30 #define PAGE_SIZE (0x1 << PAGE_SHIFT)
32 #define PAGE_SIZE (1UL << PAGE_SHIFT)
34 #define PAGE_MASK (~(PAGE_SIZE-1))
35 #define PHYSICAL_PAGE_MASK (~(PAGE_SIZE-1) & __PHYSICAL_MASK)
37 #define THREAD_ORDER 1
38 #define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER)
39 #define CURRENT_MASK (~(THREAD_SIZE-1))
41 #define EXCEPTION_STACK_ORDER 0
42 #define EXCEPTION_STKSZ (PAGE_SIZE << EXCEPTION_STACK_ORDER)
44 #define DEBUG_STACK_ORDER (EXCEPTION_STACK_ORDER + 1)
45 #define DEBUG_STKSZ (PAGE_SIZE << DEBUG_STACK_ORDER)
47 #define IRQSTACK_ORDER 2
48 #define IRQSTACKSIZE (PAGE_SIZE << IRQSTACK_ORDER)
50 #define STACKFAULT_STACK 1
51 #define DOUBLEFAULT_STACK 2
55 #define N_EXCEPTION_STACKS 5 /* hw limit: 7 */
57 #define LARGE_PAGE_MASK (~(LARGE_PAGE_SIZE-1))
58 #define LARGE_PAGE_SIZE (1UL << PMD_SHIFT)
60 #define HPAGE_SHIFT PMD_SHIFT
61 #define HPAGE_SIZE ((1UL) << HPAGE_SHIFT)
62 #define HPAGE_MASK (~(HPAGE_SIZE - 1))
63 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
68 extern unsigned long end_pfn;
70 #include <asm/maddr.h>
72 void clear_page(void *);
73 void copy_page(void *, void *);
75 #define clear_user_page(page, vaddr, pg) clear_page(page)
76 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
78 #define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr)
79 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
82 * These are used to make use of C type-checking..
84 typedef struct { unsigned long pte; } pte_t;
85 typedef struct { unsigned long pmd; } pmd_t;
86 typedef struct { unsigned long pud; } pud_t;
87 typedef struct { unsigned long pgd; } pgd_t;
88 #define PTE_MASK PHYSICAL_PAGE_MASK
90 typedef struct { unsigned long pgprot; } pgprot_t;
92 #define pte_val(x) (((x).pte & 1) ? machine_to_phys((x).pte) : \
94 #define pte_val_ma(x) ((x).pte)
96 static inline unsigned long pmd_val(pmd_t x)
98 unsigned long ret = x.pmd;
99 if (ret) ret = machine_to_phys(ret);
103 static inline unsigned long pud_val(pud_t x)
105 unsigned long ret = x.pud;
106 if (ret) ret = machine_to_phys(ret);
110 static inline unsigned long pgd_val(pgd_t x)
112 unsigned long ret = x.pgd;
113 if (ret) ret = machine_to_phys(ret);
117 #define pgprot_val(x) ((x).pgprot)
119 static inline pte_t __pte(unsigned long x)
121 if (x & 1) x = phys_to_machine(x);
122 return ((pte_t) { (x) });
125 static inline pmd_t __pmd(unsigned long x)
127 if ((x & 1)) x = phys_to_machine(x);
128 return ((pmd_t) { (x) });
131 static inline pud_t __pud(unsigned long x)
133 if ((x & 1)) x = phys_to_machine(x);
134 return ((pud_t) { (x) });
137 static inline pgd_t __pgd(unsigned long x)
139 if ((x & 1)) x = phys_to_machine(x);
140 return ((pgd_t) { (x) });
143 #define __pgprot(x) ((pgprot_t) { (x) } )
145 #define __PHYSICAL_START ((unsigned long)CONFIG_PHYSICAL_START)
146 #define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START)
147 #define __START_KERNEL_map 0xffffffff80000000UL
148 #define __PAGE_OFFSET 0xffff880000000000UL
151 #define __PHYSICAL_START CONFIG_PHYSICAL_START
152 #define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START)
153 #define __START_KERNEL_map 0xffffffff80000000
154 #define __PAGE_OFFSET 0xffff880000000000
155 #endif /* !__ASSEMBLY__ */
157 #ifdef CONFIG_XEN_COMPAT_030002
159 #define LOAD_OFFSET 0
160 #endif /* CONFIG_XEN_COMPAT_030002 */
162 /* to align the pointer to the (next) page boundary */
163 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
165 /* See Documentation/x86_64/mm.txt for a description of the memory map. */
166 #define __PHYSICAL_MASK_SHIFT 46
167 #define __PHYSICAL_MASK ((1UL << __PHYSICAL_MASK_SHIFT) - 1)
168 #define __VIRTUAL_MASK_SHIFT 48
169 #define __VIRTUAL_MASK ((1UL << __VIRTUAL_MASK_SHIFT) - 1)
171 #define KERNEL_TEXT_SIZE (40UL*1024*1024)
172 #define KERNEL_TEXT_START 0xffffffff80000000UL
174 #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
176 /* Note: __pa(&symbol_visible_to_c) should be always replaced with __pa_symbol.
177 Otherwise you risk miscompilation. */
178 #define __pa(x) (((unsigned long)(x)>=__START_KERNEL_map)?(unsigned long)(x) - (unsigned long)__START_KERNEL_map:(unsigned long)(x) - PAGE_OFFSET)
179 /* __pa_symbol should be used for C visible symbols.
180 This seems to be the official gcc blessed way to do such arithmetic. */
181 #define __pa_symbol(x) \
183 asm("" : "=r" (v) : "0" (x)); \
186 #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
187 #define __boot_va(x) __va(x)
188 #define __boot_pa(x) __pa(x)
189 #ifdef CONFIG_FLATMEM
190 #define pfn_valid(pfn) ((pfn) < end_pfn)
193 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
194 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
195 #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
197 #define VM_DATA_DEFAULT_FLAGS \
198 (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \
199 VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
201 #define __HAVE_ARCH_GATE_AREA 1
203 #include <asm-generic/memory_model.h>
204 #include <asm-generic/page.h>
207 extern int devmem_is_allowed(unsigned long pagenr);
210 #endif /* __KERNEL__ */
212 #endif /* _X86_64_PAGE_H */