1#ifndef _ASM_POWERPC_PAGE_64_H 2#define _ASM_POWERPC_PAGE_64_H 3 4/* 5 * Copyright (C) 2001 PPC64 Team, IBM Corp 6 * 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. 11 */ 12 13/* 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. 17 */ 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)) 21 22/* 23 * PAGE_FACTOR is the number of bits factor between PAGE_SHIFT and 24 * HW_PAGE_SHIFT, that is 4K pages. 25 */ 26#define PAGE_FACTOR (PAGE_SHIFT - HW_PAGE_SHIFT) 27 28/* Segment size; normal 256M segments */ 29#define SID_SHIFT 28 30#define SID_MASK ASM_CONST(0xfffffffff) 31#define ESID_MASK 0xfffffffff0000000UL 32#define GET_ESID(x) (((x) >> SID_SHIFT) & SID_MASK) 33 34/* 1T segments */ 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) 39 40#ifndef __ASSEMBLY__ 41#include <asm/cache.h> 42 43typedef unsigned long pte_basic_t; 44 45static __inline__ void clear_page(void *addr) 46{ 47 unsigned long lines, line_size; 48 49 line_size = ppc64_caches.dline_size; 50 lines = ppc64_caches.dlines_per_page; 51 52 __asm__ __volatile__( 53 "mtctr %1 # clear_page\n\ 541: dcbz 0,%0\n\ 55 add %0,%0,%3\n\ 56 bdnz+ 1b" 57 : "=r" (addr) 58 : "r" (lines), "0" (addr), "r" (line_size) 59 : "ctr", "memory"); 60} 61 62extern void copy_4K_page(void *to, void *from); 63 64#ifdef CONFIG_PPC_64K_PAGES 65static inline void copy_page(void *to, void *from) 66{ 67 unsigned int i; 68 for (i=0; i < (1 << (PAGE_SHIFT - 12)); i++) { 69 copy_4K_page(to, from); 70 to += 4096; 71 from += 4096; 72 } 73} 74#else /* CONFIG_PPC_64K_PAGES */ 75static inline void copy_page(void *to, void *from) 76{ 77 copy_4K_page(to, from); 78} 79#endif /* CONFIG_PPC_64K_PAGES */ 80 81/* Log 2 of page table size */ 82extern u64 ppc64_pft_size; 83 84/* Large pages size */ 85#ifdef CONFIG_HUGETLB_PAGE 86extern unsigned int HPAGE_SHIFT; 87#else 88#define HPAGE_SHIFT PAGE_SHIFT 89#endif 90#define HPAGE_SIZE ((1UL) << HPAGE_SHIFT) 91#define HPAGE_MASK (~(HPAGE_SIZE - 1)) 92#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) 93#define HUGE_MAX_HSTATE (MMU_PAGE_COUNT-1) 94 95#endif /* __ASSEMBLY__ */ 96 97#ifdef CONFIG_PPC_MM_SLICES 98 99#define SLICE_LOW_SHIFT 28 100#define SLICE_HIGH_SHIFT 40 101 102#define SLICE_LOW_TOP (0x100000000ul) 103#define SLICE_NUM_LOW (SLICE_LOW_TOP >> SLICE_LOW_SHIFT) 104#define SLICE_NUM_HIGH (PGTABLE_RANGE >> SLICE_HIGH_SHIFT) 105 106#define GET_LOW_SLICE_INDEX(addr) ((addr) >> SLICE_LOW_SHIFT) 107#define GET_HIGH_SLICE_INDEX(addr) ((addr) >> SLICE_HIGH_SHIFT) 108 109#ifndef __ASSEMBLY__ 110 111struct slice_mask { 112 u16 low_slices; 113 u16 high_slices; 114}; 115 116struct mm_struct; 117 118extern unsigned long slice_get_unmapped_area(unsigned long addr, 119 unsigned long len, 120 unsigned long flags, 121 unsigned int psize, 122 int topdown, 123 int use_cache); 124 125extern unsigned int get_slice_psize(struct mm_struct *mm, 126 unsigned long addr); 127 128extern void slice_init_context(struct mm_struct *mm, unsigned int psize); 129extern void slice_set_user_psize(struct mm_struct *mm, unsigned int psize); 130extern void slice_set_range_psize(struct mm_struct *mm, unsigned long start, 131 unsigned long len, unsigned int psize); 132 133#define slice_mm_new_context(mm) ((mm)->context.id == 0) 134 135#endif /* __ASSEMBLY__ */ 136#else 137#define slice_init() 138#ifdef CONFIG_PPC_STD_MMU_64 139#define get_slice_psize(mm, addr) ((mm)->context.user_psize) 140#define slice_set_user_psize(mm, psize) \ 141do { \ 142 (mm)->context.user_psize = (psize); \ 143 (mm)->context.sllp = SLB_VSID_USER | mmu_psize_defs[(psize)].sllp; \ 144} while (0) 145#else /* CONFIG_PPC_STD_MMU_64 */ 146#ifdef CONFIG_PPC_64K_PAGES 147#define get_slice_psize(mm, addr) MMU_PAGE_64K 148#else /* CONFIG_PPC_64K_PAGES */ 149#define get_slice_psize(mm, addr) MMU_PAGE_4K 150#endif /* !CONFIG_PPC_64K_PAGES */ 151#define slice_set_user_psize(mm, psize) do { BUG(); } while(0) 152#endif /* !CONFIG_PPC_STD_MMU_64 */ 153 154#define slice_set_range_psize(mm, start, len, psize) \ 155 slice_set_user_psize((mm), (psize)) 156#define slice_mm_new_context(mm) 1 157#endif /* CONFIG_PPC_MM_SLICES */ 158 159#ifdef CONFIG_HUGETLB_PAGE 160 161#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA 162 163#endif /* !CONFIG_HUGETLB_PAGE */ 164 165#define VM_DATA_DEFAULT_FLAGS \ 166 (test_thread_flag(TIF_32BIT) ? \ 167 VM_DATA_DEFAULT_FLAGS32 : VM_DATA_DEFAULT_FLAGS64) 168 169/* 170 * This is the default if a program doesn't have a PT_GNU_STACK 171 * program header entry. The PPC64 ELF ABI has a non executable stack 172 * stack by default, so in the absense of a PT_GNU_STACK program header 173 * we turn execute permission off. 174 */ 175#define VM_STACK_DEFAULT_FLAGS32 (VM_READ | VM_WRITE | VM_EXEC | \ 176 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) 177 178#define VM_STACK_DEFAULT_FLAGS64 (VM_READ | VM_WRITE | \ 179 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) 180 181#define VM_STACK_DEFAULT_FLAGS \ 182 (test_thread_flag(TIF_32BIT) ? \ 183 VM_STACK_DEFAULT_FLAGS32 : VM_STACK_DEFAULT_FLAGS64) 184 185#include <asm-generic/getorder.h> 186 187#endif /* _ASM_POWERPC_PAGE_64_H */ 188