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_page(void *to, void *from);
64 /* Log 2 of page table size */
65 extern u64 ppc64_pft_size;
67 #endif /* __ASSEMBLY__ */
69 #ifdef CONFIG_PPC_MM_SLICES
71 #define SLICE_LOW_SHIFT 28
72 #define SLICE_HIGH_SHIFT 40
74 #define SLICE_LOW_TOP (0x100000000ul)
75 #define SLICE_NUM_LOW (SLICE_LOW_TOP >> SLICE_LOW_SHIFT)
76 #define SLICE_NUM_HIGH (PGTABLE_RANGE >> SLICE_HIGH_SHIFT)
78 #define GET_LOW_SLICE_INDEX(addr) ((addr) >> SLICE_LOW_SHIFT)
79 #define GET_HIGH_SLICE_INDEX(addr) ((addr) >> SLICE_HIGH_SHIFT)
86 * This should be derived out of PGTABLE_RANGE. For the current
87 * max 64TB, u64 should be ok.
94 extern unsigned long slice_get_unmapped_area(unsigned long addr,
101 extern unsigned int get_slice_psize(struct mm_struct *mm,
104 extern void slice_init_context(struct mm_struct *mm, unsigned int psize);
105 extern void slice_set_user_psize(struct mm_struct *mm, unsigned int psize);
106 extern void slice_set_range_psize(struct mm_struct *mm, unsigned long start,
107 unsigned long len, unsigned int psize);
109 #define slice_mm_new_context(mm) ((mm)->context.id == MMU_NO_CONTEXT)
111 #endif /* __ASSEMBLY__ */
114 #ifdef CONFIG_PPC_STD_MMU_64
115 #define get_slice_psize(mm, addr) ((mm)->context.user_psize)
116 #define slice_set_user_psize(mm, psize) \
118 (mm)->context.user_psize = (psize); \
119 (mm)->context.sllp = SLB_VSID_USER | mmu_psize_defs[(psize)].sllp; \
121 #else /* CONFIG_PPC_STD_MMU_64 */
122 #ifdef CONFIG_PPC_64K_PAGES
123 #define get_slice_psize(mm, addr) MMU_PAGE_64K
124 #else /* CONFIG_PPC_64K_PAGES */
125 #define get_slice_psize(mm, addr) MMU_PAGE_4K
126 #endif /* !CONFIG_PPC_64K_PAGES */
127 #define slice_set_user_psize(mm, psize) do { BUG(); } while(0)
128 #endif /* !CONFIG_PPC_STD_MMU_64 */
130 #define slice_set_range_psize(mm, start, len, psize) \
131 slice_set_user_psize((mm), (psize))
132 #define slice_mm_new_context(mm) 1
133 #endif /* CONFIG_PPC_MM_SLICES */
135 #ifdef CONFIG_HUGETLB_PAGE
137 #ifdef CONFIG_PPC_MM_SLICES
138 #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
141 #endif /* !CONFIG_HUGETLB_PAGE */
143 #define VM_DATA_DEFAULT_FLAGS \
145 VM_DATA_DEFAULT_FLAGS32 : VM_DATA_DEFAULT_FLAGS64)
148 * This is the default if a program doesn't have a PT_GNU_STACK
149 * program header entry. The PPC64 ELF ABI has a non executable stack
150 * stack by default, so in the absence of a PT_GNU_STACK program header
151 * we turn execute permission off.
153 #define VM_STACK_DEFAULT_FLAGS32 (VM_READ | VM_WRITE | VM_EXEC | \
154 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
156 #define VM_STACK_DEFAULT_FLAGS64 (VM_READ | VM_WRITE | \
157 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
159 #define VM_STACK_DEFAULT_FLAGS \
161 VM_STACK_DEFAULT_FLAGS32 : VM_STACK_DEFAULT_FLAGS64)
163 #include <asm-generic/getorder.h>
165 #endif /* _ASM_POWERPC_PAGE_64_H */