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 iterations;
48 unsigned long onex, twox, fourx, eightx;
50 iterations = ppc64_caches.l1d.blocks_per_page / 8;
53 * Some verisions of gcc use multiply instructions to
54 * calculate the offsets so lets give it a hand to
57 onex = ppc64_caches.l1d.block_size;
63 "mtctr %1 # clear_page\n\
76 : "r" (iterations), "0" (addr), "b" (onex), "b" (twox),
77 "b" (twox+onex), "b" (fourx), "b" (fourx+onex),
78 "b" (twox+fourx), "b" (eightx-onex), "r" (eightx)
82 extern void copy_page(void *to, void *from);
84 /* Log 2 of page table size */
85 extern u64 ppc64_pft_size;
87 #endif /* __ASSEMBLY__ */
89 #ifdef CONFIG_PPC_MM_SLICES
91 #define SLICE_LOW_SHIFT 28
92 #define SLICE_HIGH_SHIFT 40
94 #define SLICE_LOW_TOP (0x100000000ul)
95 #define SLICE_NUM_LOW (SLICE_LOW_TOP >> SLICE_LOW_SHIFT)
96 #define SLICE_NUM_HIGH (H_PGTABLE_RANGE >> SLICE_HIGH_SHIFT)
98 #define GET_LOW_SLICE_INDEX(addr) ((addr) >> SLICE_LOW_SHIFT)
99 #define GET_HIGH_SLICE_INDEX(addr) ((addr) >> SLICE_HIGH_SHIFT)
102 * 1 bit per slice and we have one slice per 1TB
103 * Right now we support only 64TB.
104 * IF we change this we will have to change the type
107 #define SLICE_MASK_SIZE 8
118 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_set_user_psize(struct mm_struct *mm, unsigned int psize);
128 extern void slice_set_range_psize(struct mm_struct *mm, unsigned long start,
129 unsigned long len, unsigned int psize);
131 #endif /* __ASSEMBLY__ */
134 #ifdef CONFIG_PPC_STD_MMU_64
135 #define get_slice_psize(mm, addr) ((mm)->context.user_psize)
136 #define slice_set_user_psize(mm, psize) \
138 (mm)->context.user_psize = (psize); \
139 (mm)->context.sllp = SLB_VSID_USER | mmu_psize_defs[(psize)].sllp; \
141 #else /* CONFIG_PPC_STD_MMU_64 */
142 #ifdef CONFIG_PPC_64K_PAGES
143 #define get_slice_psize(mm, addr) MMU_PAGE_64K
144 #else /* CONFIG_PPC_64K_PAGES */
145 #define get_slice_psize(mm, addr) MMU_PAGE_4K
146 #endif /* !CONFIG_PPC_64K_PAGES */
147 #define slice_set_user_psize(mm, psize) do { BUG(); } while(0)
148 #endif /* !CONFIG_PPC_STD_MMU_64 */
150 #define slice_set_range_psize(mm, start, len, psize) \
151 slice_set_user_psize((mm), (psize))
152 #endif /* CONFIG_PPC_MM_SLICES */
154 #ifdef CONFIG_HUGETLB_PAGE
156 #ifdef CONFIG_PPC_MM_SLICES
157 #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
160 #endif /* !CONFIG_HUGETLB_PAGE */
162 #define VM_DATA_DEFAULT_FLAGS \
164 VM_DATA_DEFAULT_FLAGS32 : VM_DATA_DEFAULT_FLAGS64)
167 * This is the default if a program doesn't have a PT_GNU_STACK
168 * program header entry. The PPC64 ELF ABI has a non executable stack
169 * stack by default, so in the absence of a PT_GNU_STACK program header
170 * we turn execute permission off.
172 #define VM_STACK_DEFAULT_FLAGS32 (VM_READ | VM_WRITE | VM_EXEC | \
173 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
175 #define VM_STACK_DEFAULT_FLAGS64 (VM_READ | VM_WRITE | \
176 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
178 #define VM_STACK_DEFAULT_FLAGS \
180 VM_STACK_DEFAULT_FLAGS32 : VM_STACK_DEFAULT_FLAGS64)
182 #include <asm-generic/getorder.h>
184 #endif /* _ASM_POWERPC_PAGE_64_H */