1 #ifndef _ASM_POWERPC_PAGE_64_H
2 #define _ASM_POWERPC_PAGE_64_H
5 * Copyright (C) 2001 PPC64 Team, IBM Corp
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
14 * We always define HW_PAGE_SHIFT to 12 as use of 64K pages remains Linux
15 * specific, every notion of page number shared with the firmware, TCEs,
16 * iommu, etc... still uses a page size of 4K.
18 #define HW_PAGE_SHIFT 12
19 #define HW_PAGE_SIZE (ASM_CONST(1) << HW_PAGE_SHIFT)
20 #define HW_PAGE_MASK (~(HW_PAGE_SIZE-1))
23 * PAGE_FACTOR is the number of bits factor between PAGE_SHIFT and
24 * HW_PAGE_SHIFT, that is 4K pages.
26 #define PAGE_FACTOR (PAGE_SHIFT - HW_PAGE_SHIFT)
28 /* Segment size; normal 256M segments */
30 #define SID_MASK ASM_CONST(0xfffffffff)
31 #define ESID_MASK 0xfffffffff0000000UL
32 #define GET_ESID(x) (((x) >> SID_SHIFT) & SID_MASK)
35 #define SID_SHIFT_1T 40
36 #define SID_MASK_1T 0xffffffUL
37 #define ESID_MASK_1T 0xffffff0000000000UL
38 #define GET_ESID_1T(x) (((x) >> SID_SHIFT_1T) & SID_MASK_1T)
41 #include <asm/cache.h>
43 typedef unsigned long pte_basic_t;
45 static __inline__ void clear_page(void *addr)
47 unsigned long lines, line_size;
49 line_size = ppc64_caches.dline_size;
50 lines = ppc64_caches.dlines_per_page;
53 "mtctr %1 # clear_page\n\
58 : "r" (lines), "0" (addr), "r" (line_size)
62 extern void copy_4K_page(void *to, void *from);
64 #ifdef CONFIG_PPC_64K_PAGES
65 static inline void copy_page(void *to, void *from)
68 for (i=0; i < (1 << (PAGE_SHIFT - 12)); i++) {
69 copy_4K_page(to, from);
74 #else /* CONFIG_PPC_64K_PAGES */
75 static inline void copy_page(void *to, void *from)
77 copy_4K_page(to, from);
79 #endif /* CONFIG_PPC_64K_PAGES */
81 /* Log 2 of page table size */
82 extern u64 ppc64_pft_size;
84 /* Large pages size */
85 #ifdef CONFIG_HUGETLB_PAGE
86 extern unsigned int HPAGE_SHIFT;
88 #define HPAGE_SHIFT PAGE_SHIFT
90 #define HPAGE_SIZE ((1UL) << HPAGE_SHIFT)
91 #define HPAGE_MASK (~(HPAGE_SIZE - 1))
92 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
94 #endif /* __ASSEMBLY__ */
96 #ifdef CONFIG_PPC_MM_SLICES
98 #define SLICE_LOW_SHIFT 28
99 #define SLICE_HIGH_SHIFT 40
101 #define SLICE_LOW_TOP (0x100000000ul)
102 #define SLICE_NUM_LOW (SLICE_LOW_TOP >> SLICE_LOW_SHIFT)
103 #define SLICE_NUM_HIGH (PGTABLE_RANGE >> SLICE_HIGH_SHIFT)
105 #define GET_LOW_SLICE_INDEX(addr) ((addr) >> SLICE_LOW_SHIFT)
106 #define GET_HIGH_SLICE_INDEX(addr) ((addr) >> SLICE_HIGH_SHIFT)
117 extern unsigned long slice_get_unmapped_area(unsigned long addr,
124 extern unsigned int get_slice_psize(struct mm_struct *mm,
127 extern void slice_init_context(struct mm_struct *mm, unsigned int psize);
128 extern void slice_set_user_psize(struct mm_struct *mm, unsigned int psize);
129 #define slice_mm_new_context(mm) ((mm)->context.id == 0)
131 #define ARCH_HAS_HUGEPAGE_ONLY_RANGE
132 extern int is_hugepage_only_range(struct mm_struct *m,
136 #endif /* __ASSEMBLY__ */
139 #define slice_set_user_psize(mm, psize) \
141 (mm)->context.user_psize = (psize); \
142 (mm)->context.sllp = SLB_VSID_USER | mmu_psize_defs[(psize)].sllp; \
144 #define slice_mm_new_context(mm) 1
145 #endif /* CONFIG_PPC_MM_SLICES */
147 #ifdef CONFIG_HUGETLB_PAGE
149 #define ARCH_HAS_HUGETLB_FREE_PGD_RANGE
150 #define ARCH_HAS_SETCLEAR_HUGE_PTE
151 #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
153 #endif /* !CONFIG_HUGETLB_PAGE */
156 #define __page_aligned __attribute__((__aligned__(PAGE_SIZE)))
158 #define __page_aligned \
159 __attribute__((__aligned__(PAGE_SIZE), \
160 __section__(".data.page_aligned")))
163 #define VM_DATA_DEFAULT_FLAGS \
164 (test_thread_flag(TIF_32BIT) ? \
165 VM_DATA_DEFAULT_FLAGS32 : VM_DATA_DEFAULT_FLAGS64)
168 * This is the default if a program doesn't have a PT_GNU_STACK
169 * program header entry. The PPC64 ELF ABI has a non executable stack
170 * stack by default, so in the absense of a PT_GNU_STACK program header
171 * we turn execute permission off.
173 #define VM_STACK_DEFAULT_FLAGS32 (VM_READ | VM_WRITE | VM_EXEC | \
174 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
176 #define VM_STACK_DEFAULT_FLAGS64 (VM_READ | VM_WRITE | \
177 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
179 #define VM_STACK_DEFAULT_FLAGS \
180 (test_thread_flag(TIF_32BIT) ? \
181 VM_STACK_DEFAULT_FLAGS32 : VM_STACK_DEFAULT_FLAGS64)
183 #include <asm-generic/page.h>
185 #endif /* _ASM_POWERPC_PAGE_64_H */