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2#ifndef _ASM_POWERPC_PAGE_H
3#define _ASM_POWERPC_PAGE_H
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8
9#ifndef __ASSEMBLY__
10#include <linux/types.h>
11#include <linux/kernel.h>
12#else
13#include <asm/types.h>
14#endif
15#include <asm/asm-const.h>
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22
23#define PAGE_SHIFT CONFIG_PPC_PAGE_SHIFT
24#define PAGE_SIZE (ASM_CONST(1) << PAGE_SHIFT)
25
26#ifndef __ASSEMBLY__
27#ifndef CONFIG_HUGETLB_PAGE
28#define HPAGE_SHIFT PAGE_SHIFT
29#elif defined(CONFIG_PPC_BOOK3S_64)
30extern unsigned int hpage_shift;
31#define HPAGE_SHIFT hpage_shift
32#elif defined(CONFIG_PPC_8xx)
33#define HPAGE_SHIFT 19
34#elif defined(CONFIG_PPC_FSL_BOOK3E)
35#define HPAGE_SHIFT 22
36#endif
37#define HPAGE_SIZE ((1UL) << HPAGE_SHIFT)
38#define HPAGE_MASK (~(HPAGE_SIZE - 1))
39#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
40#define HUGE_MAX_HSTATE (MMU_PAGE_COUNT-1)
41#endif
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47
48#define PAGE_MASK (~((1 << PAGE_SHIFT) - 1))
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80#define KERNELBASE ASM_CONST(CONFIG_KERNEL_START)
81#define PAGE_OFFSET ASM_CONST(CONFIG_PAGE_OFFSET)
82#define LOAD_OFFSET ASM_CONST((CONFIG_KERNEL_START-CONFIG_PHYSICAL_START))
83
84#if defined(CONFIG_NONSTATIC_KERNEL)
85#ifndef __ASSEMBLY__
86
87extern phys_addr_t memstart_addr;
88extern phys_addr_t kernstart_addr;
89
90#if defined(CONFIG_RELOCATABLE) && defined(CONFIG_PPC32)
91extern long long virt_phys_offset;
92#endif
93
94#endif
95#define PHYSICAL_START kernstart_addr
96
97#else
98#define PHYSICAL_START ASM_CONST(CONFIG_PHYSICAL_START)
99#endif
100
101
102#if defined(CONFIG_PPC32) && defined(CONFIG_BOOKE)
103#ifdef CONFIG_RELOCATABLE
104#define VIRT_PHYS_OFFSET virt_phys_offset
105#else
106#define VIRT_PHYS_OFFSET (KERNELBASE - PHYSICAL_START)
107#endif
108#endif
109
110#ifdef CONFIG_PPC64
111#define MEMORY_START 0UL
112#elif defined(CONFIG_NONSTATIC_KERNEL)
113#define MEMORY_START memstart_addr
114#else
115#define MEMORY_START (PHYSICAL_START + PAGE_OFFSET - KERNELBASE)
116#endif
117
118#ifdef CONFIG_FLATMEM
119#define ARCH_PFN_OFFSET ((unsigned long)(MEMORY_START >> PAGE_SHIFT))
120#ifndef __ASSEMBLY__
121extern unsigned long max_mapnr;
122static inline bool pfn_valid(unsigned long pfn)
123{
124 unsigned long min_pfn = ARCH_PFN_OFFSET;
125
126 return pfn >= min_pfn && pfn < max_mapnr;
127}
128#endif
129#endif
130
131#define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT)
132#define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr))
133#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
134
135#define virt_addr_valid(kaddr) pfn_valid(virt_to_pfn(kaddr))
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210#if defined(CONFIG_PPC32) && defined(CONFIG_BOOKE)
211#define __va(x) ((void *)(unsigned long)((phys_addr_t)(x) + VIRT_PHYS_OFFSET))
212#define __pa(x) ((unsigned long)(x) - VIRT_PHYS_OFFSET)
213#else
214#ifdef CONFIG_PPC64
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218
219#define __va(x) ((void *)(unsigned long)((phys_addr_t)(x) | PAGE_OFFSET))
220#define __pa(x) ((unsigned long)(x) & 0x0fffffffffffffffUL)
221
222#else
223#define __va(x) ((void *)(unsigned long)((phys_addr_t)(x) + PAGE_OFFSET - MEMORY_START))
224#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET + MEMORY_START)
225#endif
226#endif
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232
233#define VM_DATA_DEFAULT_FLAGS32 \
234 (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) | \
235 VM_READ | VM_WRITE | \
236 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
237
238#define VM_DATA_DEFAULT_FLAGS64 (VM_READ | VM_WRITE | \
239 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
240
241#ifdef __powerpc64__
242#include <asm/page_64.h>
243#else
244#include <asm/page_32.h>
245#endif
246
247
248#define _ALIGN_UP(addr, size) __ALIGN_KERNEL(addr, size)
249#define _ALIGN_DOWN(addr, size) ((addr)&(~((typeof(addr))(size)-1)))
250
251
252#define _ALIGN(addr,size) _ALIGN_UP(addr,size)
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258#ifdef CONFIG_PPC_BOOK3E_64
259#define is_kernel_addr(x) ((x) >= 0x8000000000000000ul)
260#else
261#define is_kernel_addr(x) ((x) >= PAGE_OFFSET)
262#endif
263
264#ifndef CONFIG_PPC_BOOK3S_64
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270
271#ifdef CONFIG_PPC64
272#define PD_HUGE 0x8000000000000000UL
273#else
274#define PD_HUGE 0x80000000
275#endif
276
277#else
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281
282#define HUGEPD_ADDR_MASK (0x0ffffffffffffffful & ~HUGEPD_SHIFT_MASK)
283#endif
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289#define HUGEPD_SHIFT_MASK 0x3f
290
291#ifndef __ASSEMBLY__
292
293#ifdef CONFIG_PPC_BOOK3S_64
294#include <asm/pgtable-be-types.h>
295#else
296#include <asm/pgtable-types.h>
297#endif
298
299
300#ifndef CONFIG_HUGETLB_PAGE
301#define is_hugepd(pdep) (0)
302#define pgd_huge(pgd) (0)
303#endif
304
305struct page;
306extern void clear_user_page(void *page, unsigned long vaddr, struct page *pg);
307extern void copy_user_page(void *to, void *from, unsigned long vaddr,
308 struct page *p);
309extern int devmem_is_allowed(unsigned long pfn);
310
311#ifdef CONFIG_PPC_SMLPAR
312void arch_free_page(struct page *page, int order);
313#define HAVE_ARCH_FREE_PAGE
314#endif
315
316struct vm_area_struct;
317
318#include <asm-generic/memory_model.h>
319#endif
320#include <asm/slice.h>
321
322
323
324
325#ifdef CONFIG_PPC32
326#define ARCH_ZONE_DMA_BITS 30
327#else
328#define ARCH_ZONE_DMA_BITS 31
329#endif
330
331#endif
332