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)
82 * 1 bit per slice and we have one slice per 1TB
83 * Right now we support only 64TB.
84 * IF we change this we will have to change the type
87 #define SLICE_MASK_SIZE 8
98 extern unsigned long slice_get_unmapped_area(unsigned long addr
,
104 extern unsigned int get_slice_psize(struct mm_struct
*mm
,
107 extern void slice_init_context(struct mm_struct
*mm
, unsigned int psize
);
108 extern void slice_set_user_psize(struct mm_struct
*mm
, unsigned int psize
);
109 extern void slice_set_range_psize(struct mm_struct
*mm
, unsigned long start
,
110 unsigned long len
, unsigned int psize
);
112 #define slice_mm_new_context(mm) ((mm)->context.id == MMU_NO_CONTEXT)
114 #endif /* __ASSEMBLY__ */
117 #ifdef CONFIG_PPC_STD_MMU_64
118 #define get_slice_psize(mm, addr) ((mm)->context.user_psize)
119 #define slice_set_user_psize(mm, psize) \
121 (mm)->context.user_psize = (psize); \
122 (mm)->context.sllp = SLB_VSID_USER | mmu_psize_defs[(psize)].sllp; \
124 #else /* CONFIG_PPC_STD_MMU_64 */
125 #ifdef CONFIG_PPC_64K_PAGES
126 #define get_slice_psize(mm, addr) MMU_PAGE_64K
127 #else /* CONFIG_PPC_64K_PAGES */
128 #define get_slice_psize(mm, addr) MMU_PAGE_4K
129 #endif /* !CONFIG_PPC_64K_PAGES */
130 #define slice_set_user_psize(mm, psize) do { BUG(); } while(0)
131 #endif /* !CONFIG_PPC_STD_MMU_64 */
133 #define slice_set_range_psize(mm, start, len, psize) \
134 slice_set_user_psize((mm), (psize))
135 #define slice_mm_new_context(mm) 1
136 #endif /* CONFIG_PPC_MM_SLICES */
138 #ifdef CONFIG_HUGETLB_PAGE
140 #ifdef CONFIG_PPC_MM_SLICES
141 #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
144 #endif /* !CONFIG_HUGETLB_PAGE */
146 #define VM_DATA_DEFAULT_FLAGS \
148 VM_DATA_DEFAULT_FLAGS32 : VM_DATA_DEFAULT_FLAGS64)
151 * This is the default if a program doesn't have a PT_GNU_STACK
152 * program header entry. The PPC64 ELF ABI has a non executable stack
153 * stack by default, so in the absence of a PT_GNU_STACK program header
154 * we turn execute permission off.
156 #define VM_STACK_DEFAULT_FLAGS32 (VM_READ | VM_WRITE | VM_EXEC | \
157 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
159 #define VM_STACK_DEFAULT_FLAGS64 (VM_READ | VM_WRITE | \
160 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
162 #define VM_STACK_DEFAULT_FLAGS \
164 VM_STACK_DEFAULT_FLAGS32 : VM_STACK_DEFAULT_FLAGS64)
166 #include <asm-generic/getorder.h>
168 #endif /* _ASM_POWERPC_PAGE_64_H */