pgtable-ppc64.h revision 944916858a430a0627e483657d4cfa2cd2dfb4f7
1f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#ifndef _ASM_POWERPC_PGTABLE_PPC64_H_ 2f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define _ASM_POWERPC_PGTABLE_PPC64_H_ 3f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* 4f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * This file contains the functions and defines necessary to modify and use 5f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * the ppc64 hashed page table. 6f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson */ 7f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 8f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#ifndef __ASSEMBLY__ 9f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#include <linux/stddef.h> 10f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#include <asm/tlbflush.h> 11f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#endif /* __ASSEMBLY__ */ 12f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 13f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#ifdef CONFIG_PPC_64K_PAGES 14c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#include <asm/pgtable-ppc64-64k.h> 15f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#else 16c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#include <asm/pgtable-ppc64-4k.h> 17f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#endif 18f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 19f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define FIRST_USER_ADDRESS 0 20f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 21f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* 22f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * Size of EA range mapped by our pagetables. 23f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson */ 24f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define PGTABLE_EADDR_SIZE (PTE_INDEX_SIZE + PMD_INDEX_SIZE + \ 25f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson PUD_INDEX_SIZE + PGD_INDEX_SIZE + PAGE_SHIFT) 263d5134ee8341bffc4f539049abb9e90d469b448dBenjamin Herrenschmidt#define PGTABLE_RANGE (ASM_CONST(1) << PGTABLE_EADDR_SIZE) 27f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 28c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt 29c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt/* Some sanity checking */ 30f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#if TASK_SIZE_USER64 > PGTABLE_RANGE 31f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#error TASK_SIZE_USER64 exceeds pagetable range 32f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#endif 33f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 34944916858a430a0627e483657d4cfa2cd2dfb4f7Benjamin Herrenschmidt#ifdef CONFIG_PPC_STD_MMU_64 35f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#if TASK_SIZE_USER64 > (1UL << (USER_ESID_BITS + SID_SHIFT)) 36f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#error TASK_SIZE_USER64 exceeds user VSID range 37f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#endif 38944916858a430a0627e483657d4cfa2cd2dfb4f7Benjamin Herrenschmidt#endif 39f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 40f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* 41f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * Define the address range of the vmalloc VM area. 42f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson */ 43f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define VMALLOC_START ASM_CONST(0xD000000000000000) 443d5134ee8341bffc4f539049abb9e90d469b448dBenjamin Herrenschmidt#define VMALLOC_SIZE (PGTABLE_RANGE >> 1) 45f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define VMALLOC_END (VMALLOC_START + VMALLOC_SIZE) 46f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 47f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* 483d5134ee8341bffc4f539049abb9e90d469b448dBenjamin Herrenschmidt * Define the address ranges for MMIO and IO space : 493d5134ee8341bffc4f539049abb9e90d469b448dBenjamin Herrenschmidt * 503d5134ee8341bffc4f539049abb9e90d469b448dBenjamin Herrenschmidt * ISA_IO_BASE = VMALLOC_END, 64K reserved area 513d5134ee8341bffc4f539049abb9e90d469b448dBenjamin Herrenschmidt * PHB_IO_BASE = ISA_IO_BASE + 64K to ISA_IO_BASE + 2G, PHB IO spaces 523d5134ee8341bffc4f539049abb9e90d469b448dBenjamin Herrenschmidt * IOREMAP_BASE = ISA_IO_BASE + 2G to VMALLOC_START + PGTABLE_RANGE 53f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson */ 543d5134ee8341bffc4f539049abb9e90d469b448dBenjamin Herrenschmidt#define FULL_IO_SIZE 0x80000000ul 553d5134ee8341bffc4f539049abb9e90d469b448dBenjamin Herrenschmidt#define ISA_IO_BASE (VMALLOC_END) 563d5134ee8341bffc4f539049abb9e90d469b448dBenjamin Herrenschmidt#define ISA_IO_END (VMALLOC_END + 0x10000ul) 573d5134ee8341bffc4f539049abb9e90d469b448dBenjamin Herrenschmidt#define PHB_IO_BASE (ISA_IO_END) 583d5134ee8341bffc4f539049abb9e90d469b448dBenjamin Herrenschmidt#define PHB_IO_END (VMALLOC_END + FULL_IO_SIZE) 593d5134ee8341bffc4f539049abb9e90d469b448dBenjamin Herrenschmidt#define IOREMAP_BASE (PHB_IO_END) 603d5134ee8341bffc4f539049abb9e90d469b448dBenjamin Herrenschmidt#define IOREMAP_END (VMALLOC_START + PGTABLE_RANGE) 61f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 62f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* 63f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * Region IDs 64f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson */ 65f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define REGION_SHIFT 60UL 66f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define REGION_MASK (0xfUL << REGION_SHIFT) 67f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define REGION_ID(ea) (((unsigned long)(ea)) >> REGION_SHIFT) 68f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 69f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define VMALLOC_REGION_ID (REGION_ID(VMALLOC_START)) 70f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define KERNEL_REGION_ID (REGION_ID(PAGE_OFFSET)) 71cec08e7a948326b01555be6311480aa08e637de2Benjamin Herrenschmidt#define VMEMMAP_REGION_ID (0xfUL) 72f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define USER_REGION_ID (0UL) 73f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 74f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* 75cec08e7a948326b01555be6311480aa08e637de2Benjamin Herrenschmidt * Defines the address of the vmemap area, in its own region 76d29eff7bca60c9ee401d691d4562a4abca8de543Andy Whitcroft */ 77cec08e7a948326b01555be6311480aa08e637de2Benjamin Herrenschmidt#define VMEMMAP_BASE (VMEMMAP_REGION_ID << REGION_SHIFT) 78cec08e7a948326b01555be6311480aa08e637de2Benjamin Herrenschmidt#define vmemmap ((struct page *)VMEMMAP_BASE) 79cec08e7a948326b01555be6311480aa08e637de2Benjamin Herrenschmidt 80d29eff7bca60c9ee401d691d4562a4abca8de543Andy Whitcroft 81d29eff7bca60c9ee401d691d4562a4abca8de543Andy Whitcroft/* 82c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt * Include the PTE bits definitions 83f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson */ 84c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#include <asm/pte-hash64.h> 8571087002cf807e25056dba4e4028a9f204dc9ffdBenjamin Herrenschmidt#include <asm/pte-common.h> 86c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt 87f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 8894ee815c05c9387931e549d83312d30009ed86e9Benjamin Herrenschmidt#ifdef CONFIG_PPC_MM_SLICES 89f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define HAVE_ARCH_UNMAPPED_AREA 90f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN 9194ee815c05c9387931e549d83312d30009ed86e9Benjamin Herrenschmidt#endif /* CONFIG_PPC_MM_SLICES */ 92f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 93f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#ifndef __ASSEMBLY__ 94f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 95f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* 96c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt * This is the default implementation of various PTE accessors, it's 97c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt * used in all cases except Book3S with 64K pages where we have a 98c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt * concept of sub-pages 99c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt */ 100c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#ifndef __real_pte 101c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt 102c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#ifdef STRICT_MM_TYPECHECKS 103c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#define __real_pte(e,p) ((real_pte_t){(e)}) 104c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#define __rpte_to_pte(r) ((r).pte) 105c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#else 106c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#define __real_pte(e,p) (e) 107c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#define __rpte_to_pte(r) (__pte(r)) 108c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#endif 109c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#define __rpte_to_hidx(r,index) (pte_val(__rpte_to_pte(r)) >> 12) 110c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt 111c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#define pte_iterate_hashed_subpages(rpte, psize, va, index, shift) \ 112c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt do { \ 113c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt index = 0; \ 114c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt shift = mmu_psize_defs[psize].shift; \ 115c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt 116c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#define pte_iterate_hashed_end() } while(0) 117c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt 118c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#ifdef CONFIG_PPC_HAS_HASH_64K 119c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#define pte_pagesize_index(mm, addr, pte) get_slice_psize(mm, addr) 120c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#else 121c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#define pte_pagesize_index(mm, addr, pte) MMU_PAGE_4K 122c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#endif 123c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt 124c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#endif /* __real_pte */ 125c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt 126c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt 127f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* pte_clear moved to later in this file */ 128f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 129f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define PMD_BAD_BITS (PTE_TABLE_SIZE-1) 130f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define PUD_BAD_BITS (PMD_TABLE_SIZE-1) 131f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 132f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pmd_set(pmdp, pmdval) (pmd_val(*(pmdp)) = (pmdval)) 133f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pmd_none(pmd) (!pmd_val(pmd)) 134f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pmd_bad(pmd) (!is_kernel_addr(pmd_val(pmd)) \ 135f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson || (pmd_val(pmd) & PMD_BAD_BITS)) 136f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pmd_present(pmd) (pmd_val(pmd) != 0) 137f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pmd_clear(pmdp) (pmd_val(*(pmdp)) = 0) 138f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pmd_page_vaddr(pmd) (pmd_val(pmd) & ~PMD_MASKED_BITS) 139f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pmd_page(pmd) virt_to_page(pmd_page_vaddr(pmd)) 140f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 141f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pud_set(pudp, pudval) (pud_val(*(pudp)) = (pudval)) 142f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pud_none(pud) (!pud_val(pud)) 143f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pud_bad(pud) (!is_kernel_addr(pud_val(pud)) \ 144f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson || (pud_val(pud) & PUD_BAD_BITS)) 145f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pud_present(pud) (pud_val(pud) != 0) 146f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pud_clear(pudp) (pud_val(*(pudp)) = 0) 147f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pud_page_vaddr(pud) (pud_val(pud) & ~PUD_MASKED_BITS) 148f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pud_page(pud) virt_to_page(pud_page_vaddr(pud)) 149f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 150f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pgd_set(pgdp, pudp) ({pgd_val(*(pgdp)) = (unsigned long)(pudp);}) 151f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 152f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* 153f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * Find an entry in a page-table-directory. We combine the address region 154f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * (the high order N bits) and the pgd portion of the address. 155f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson */ 156f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* to avoid overflow in free_pgtables we don't use PTRS_PER_PGD here */ 157f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pgd_index(address) (((address) >> (PGDIR_SHIFT)) & 0x1ff) 158f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 159f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address)) 160f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 161f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pmd_offset(pudp,addr) \ 162f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson (((pmd_t *) pud_page_vaddr(*(pudp))) + (((addr) >> PMD_SHIFT) & (PTRS_PER_PMD - 1))) 163f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 164f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pte_offset_kernel(dir,addr) \ 165f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson (((pte_t *) pmd_page_vaddr(*(dir))) + (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))) 166f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 167f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pte_offset_map(dir,addr) pte_offset_kernel((dir), (addr)) 168f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pte_offset_map_nested(dir,addr) pte_offset_kernel((dir), (addr)) 169f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pte_unmap(pte) do { } while(0) 170f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pte_unmap_nested(pte) do { } while(0) 171f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 172f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* to find an entry in a kernel page-table-directory */ 173f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* This now only contains the vmalloc pages */ 174f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pgd_offset_k(address) pgd_offset(&init_mm, address) 175f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 176f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 177f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* Atomic PTE updates */ 178f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibsonstatic inline unsigned long pte_update(struct mm_struct *mm, 179f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson unsigned long addr, 180f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson pte_t *ptep, unsigned long clr, 181f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson int huge) 182f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson{ 183a033a487f8ae79800a15774cb6565cbbca685fc6Benjamin Herrenschmidt#ifdef PTE_ATOMIC_UPDATES 184f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson unsigned long old, tmp; 185f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 186f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson __asm__ __volatile__( 187f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson "1: ldarx %0,0,%3 # pte_update\n\ 188f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson andi. %1,%0,%6\n\ 189f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson bne- 1b \n\ 190f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson andc %1,%0,%4 \n\ 191f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson stdcx. %1,0,%3 \n\ 192f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson bne- 1b" 193f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson : "=&r" (old), "=&r" (tmp), "=m" (*ptep) 194f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson : "r" (ptep), "r" (clr), "m" (*ptep), "i" (_PAGE_BUSY) 195f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson : "cc" ); 196a033a487f8ae79800a15774cb6565cbbca685fc6Benjamin Herrenschmidt#else 197a033a487f8ae79800a15774cb6565cbbca685fc6Benjamin Herrenschmidt unsigned long old = pte_val(*ptep); 198a033a487f8ae79800a15774cb6565cbbca685fc6Benjamin Herrenschmidt *ptep = __pte(old & ~clr); 199a033a487f8ae79800a15774cb6565cbbca685fc6Benjamin Herrenschmidt#endif 2008d30c14cab30d405a05f2aaceda1e9ad57800f36Benjamin Herrenschmidt /* huge pages use the old page table lock */ 2018d30c14cab30d405a05f2aaceda1e9ad57800f36Benjamin Herrenschmidt if (!huge) 2028d30c14cab30d405a05f2aaceda1e9ad57800f36Benjamin Herrenschmidt assert_pte_locked(mm, addr); 2038d30c14cab30d405a05f2aaceda1e9ad57800f36Benjamin Herrenschmidt 204944916858a430a0627e483657d4cfa2cd2dfb4f7Benjamin Herrenschmidt#ifdef CONFIG_PPC_STD_MMU_64 205f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson if (old & _PAGE_HASHPTE) 206f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson hpte_need_flush(mm, addr, ptep, old, huge); 207944916858a430a0627e483657d4cfa2cd2dfb4f7Benjamin Herrenschmidt#endif 208944916858a430a0627e483657d4cfa2cd2dfb4f7Benjamin Herrenschmidt 209f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson return old; 210f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson} 211f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 212f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibsonstatic inline int __ptep_test_and_clear_young(struct mm_struct *mm, 213f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson unsigned long addr, pte_t *ptep) 214f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson{ 215f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson unsigned long old; 216f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 217f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson if ((pte_val(*ptep) & (_PAGE_ACCESSED | _PAGE_HASHPTE)) == 0) 218f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson return 0; 219f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson old = pte_update(mm, addr, ptep, _PAGE_ACCESSED, 0); 220f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson return (old & _PAGE_ACCESSED) != 0; 221f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson} 222f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG 223f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define ptep_test_and_clear_young(__vma, __addr, __ptep) \ 224f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson({ \ 225f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson int __r; \ 226f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson __r = __ptep_test_and_clear_young((__vma)->vm_mm, __addr, __ptep); \ 227f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson __r; \ 228f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson}) 229f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 230f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define __HAVE_ARCH_PTEP_SET_WRPROTECT 231f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibsonstatic inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, 232f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson pte_t *ptep) 233f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson{ 234f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson unsigned long old; 235f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 236f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson if ((pte_val(*ptep) & _PAGE_RW) == 0) 237f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson return; 238f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson old = pte_update(mm, addr, ptep, _PAGE_RW, 0); 239f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson} 240f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 241016b33c4958681c24056abed8ec95844a0da80a3Andy Whitcroftstatic inline void huge_ptep_set_wrprotect(struct mm_struct *mm, 242016b33c4958681c24056abed8ec95844a0da80a3Andy Whitcroft unsigned long addr, pte_t *ptep) 243016b33c4958681c24056abed8ec95844a0da80a3Andy Whitcroft{ 244016b33c4958681c24056abed8ec95844a0da80a3Andy Whitcroft unsigned long old; 245016b33c4958681c24056abed8ec95844a0da80a3Andy Whitcroft 24686df86424939d316b1f6cfac1b6204f0c7dee317David Gibson if ((pte_val(*ptep) & _PAGE_RW) == 0) 24786df86424939d316b1f6cfac1b6204f0c7dee317David Gibson return; 248016b33c4958681c24056abed8ec95844a0da80a3Andy Whitcroft old = pte_update(mm, addr, ptep, _PAGE_RW, 1); 249016b33c4958681c24056abed8ec95844a0da80a3Andy Whitcroft} 250f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 251f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* 252f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * We currently remove entries from the hashtable regardless of whether 253f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * the entry was young or dirty. The generic routines only flush if the 254f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * entry was young or dirty which is not good enough. 255f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * 256f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * We should be more intelligent about this but for the moment we override 257f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * these functions and force a tlb flush unconditionally 258f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson */ 259f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH 260f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define ptep_clear_flush_young(__vma, __address, __ptep) \ 261f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson({ \ 262f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson int __young = __ptep_test_and_clear_young((__vma)->vm_mm, __address, \ 263f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson __ptep); \ 264f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson __young; \ 265f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson}) 266f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 267f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define __HAVE_ARCH_PTEP_GET_AND_CLEAR 268f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibsonstatic inline pte_t ptep_get_and_clear(struct mm_struct *mm, 269f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson unsigned long addr, pte_t *ptep) 270f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson{ 271f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson unsigned long old = pte_update(mm, addr, ptep, ~0UL, 0); 272f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson return __pte(old); 273f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson} 274f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 275f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibsonstatic inline void pte_clear(struct mm_struct *mm, unsigned long addr, 276f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson pte_t * ptep) 277f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson{ 278f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson pte_update(mm, addr, ptep, ~0UL, 0); 279f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson} 280f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 281f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 282f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* Set the dirty and/or accessed bits atomically in a linux PTE, this 283f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * function doesn't need to flush the hash entry 284f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson */ 2858d30c14cab30d405a05f2aaceda1e9ad57800f36Benjamin Herrenschmidtstatic inline void __ptep_set_access_flags(pte_t *ptep, pte_t entry) 286f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson{ 287f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson unsigned long bits = pte_val(entry) & 2888d1cf34e7ad5c7738ce20d20bd7f002f562cb8b5Benjamin Herrenschmidt (_PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_RW | 2898d1cf34e7ad5c7738ce20d20bd7f002f562cb8b5Benjamin Herrenschmidt _PAGE_EXEC | _PAGE_HWEXEC); 290a033a487f8ae79800a15774cb6565cbbca685fc6Benjamin Herrenschmidt 291a033a487f8ae79800a15774cb6565cbbca685fc6Benjamin Herrenschmidt#ifdef PTE_ATOMIC_UPDATES 292f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson unsigned long old, tmp; 293f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 294f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson __asm__ __volatile__( 295f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson "1: ldarx %0,0,%4\n\ 296f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson andi. %1,%0,%6\n\ 297f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson bne- 1b \n\ 298f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson or %0,%3,%0\n\ 299f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson stdcx. %0,0,%4\n\ 300f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson bne- 1b" 301f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson :"=&r" (old), "=&r" (tmp), "=m" (*ptep) 302f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson :"r" (bits), "r" (ptep), "m" (*ptep), "i" (_PAGE_BUSY) 303f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson :"cc"); 304a033a487f8ae79800a15774cb6565cbbca685fc6Benjamin Herrenschmidt#else 305a033a487f8ae79800a15774cb6565cbbca685fc6Benjamin Herrenschmidt unsigned long old = pte_val(*ptep); 306a033a487f8ae79800a15774cb6565cbbca685fc6Benjamin Herrenschmidt *ptep = __pte(old | bits); 307a033a487f8ae79800a15774cb6565cbbca685fc6Benjamin Herrenschmidt#endif 308f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson} 309f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 310f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define __HAVE_ARCH_PTE_SAME 311f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pte_same(A,B) (((pte_val(A) ^ pte_val(B)) & ~_PAGE_HPTEFLAGS) == 0) 312f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 313f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pte_ERROR(e) \ 314f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e)) 315f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pmd_ERROR(e) \ 316f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson printk("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, pmd_val(e)) 317f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pgd_ERROR(e) \ 318f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e)) 319f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 320f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* Encode and de-code a swap entry */ 321f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define __swp_type(entry) (((entry).val >> 1) & 0x3f) 322f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define __swp_offset(entry) ((entry).val >> 8) 323f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define __swp_entry(type, offset) ((swp_entry_t){((type)<< 1)|((offset)<<8)}) 324f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define __pte_to_swp_entry(pte) ((swp_entry_t){pte_val(pte) >> PTE_RPN_SHIFT}) 325f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define __swp_entry_to_pte(x) ((pte_t) { (x).val << PTE_RPN_SHIFT }) 326f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pte_to_pgoff(pte) (pte_val(pte) >> PTE_RPN_SHIFT) 327f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pgoff_to_pte(off) ((pte_t) {((off) << PTE_RPN_SHIFT)|_PAGE_FILE}) 328f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define PTE_FILE_MAX_BITS (BITS_PER_LONG - PTE_RPN_SHIFT) 329f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 330f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibsonvoid pgtable_cache_init(void); 331f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 332f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* 333f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * find_linux_pte returns the address of a linux pte for a given 334f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * effective address and directory. If not found, it returns zero. 335f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson */static inline pte_t *find_linux_pte(pgd_t *pgdir, unsigned long ea) 336f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson{ 337f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson pgd_t *pg; 338f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson pud_t *pu; 339f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson pmd_t *pm; 340f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson pte_t *pt = NULL; 341f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 342f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson pg = pgdir + pgd_index(ea); 343f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson if (!pgd_none(*pg)) { 344f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson pu = pud_offset(pg, ea); 345f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson if (!pud_none(*pu)) { 346f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson pm = pmd_offset(pu, ea); 347f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson if (pmd_present(*pm)) 348f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson pt = pte_offset_kernel(pm, ea); 349f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson } 350f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson } 351f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson return pt; 352f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson} 353f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 354ce0ad7f0952581ba75ab6aee55bb1ed9bb22cf4fNick Pigginpte_t *huge_pte_offset(struct mm_struct *mm, unsigned long address); 355ce0ad7f0952581ba75ab6aee55bb1ed9bb22cf4fNick Piggin 356f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#endif /* __ASSEMBLY__ */ 357f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 358f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#endif /* _ASM_POWERPC_PGTABLE_PPC64_H_ */ 359