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#ifdef CONFIG_PPC_64K_PAGES 9c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#include <asm/pgtable-ppc64-64k.h> 10f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#else 11c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#include <asm/pgtable-ppc64-4k.h> 12f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#endif 13074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V#include <asm/barrier.h> 14f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 15f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define FIRST_USER_ADDRESS 0 16f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 17f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* 18f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * Size of EA range mapped by our pagetables. 19f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson */ 20f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define PGTABLE_EADDR_SIZE (PTE_INDEX_SIZE + PMD_INDEX_SIZE + \ 21f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson PUD_INDEX_SIZE + PGD_INDEX_SIZE + PAGE_SHIFT) 223d5134ee8341bffc4f539049abb9e90d469b448dBenjamin Herrenschmidt#define PGTABLE_RANGE (ASM_CONST(1) << PGTABLE_EADDR_SIZE) 23f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 24f940f5289873af2ad2c4e73f88c24ad2b8fe3f87Aneesh Kumar K.V#ifdef CONFIG_TRANSPARENT_HUGEPAGE 25f940f5289873af2ad2c4e73f88c24ad2b8fe3f87Aneesh Kumar K.V#define PMD_CACHE_INDEX (PMD_INDEX_SIZE + 1) 26f940f5289873af2ad2c4e73f88c24ad2b8fe3f87Aneesh Kumar K.V#else 27f940f5289873af2ad2c4e73f88c24ad2b8fe3f87Aneesh Kumar K.V#define PMD_CACHE_INDEX PMD_INDEX_SIZE 28f940f5289873af2ad2c4e73f88c24ad2b8fe3f87Aneesh Kumar K.V#endif 29f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* 3057e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt * Define the address range of the kernel non-linear virtual area 31f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson */ 3257e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt 3357e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#ifdef CONFIG_PPC_BOOK3E 3457e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#define KERN_VIRT_START ASM_CONST(0x8000000000000000) 3557e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#else 3657e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#define KERN_VIRT_START ASM_CONST(0xD000000000000000) 3757e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#endif 3867550080b8288ee9b61e132e8ebc87d563f9c516Aneesh Kumar K.V#define KERN_VIRT_SIZE ASM_CONST(0x0000100000000000) 39f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 40f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* 4157e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt * The vmalloc space starts at the beginning of that region, and 4257e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt * occupies half of it on hash CPUs and a quarter of it on Book3E 4332a74949b7337726e76d69f51c48715431126c6cBenjamin Herrenschmidt * (we keep a quarter for the virtual memmap) 4457e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt */ 4557e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#define VMALLOC_START KERN_VIRT_START 4657e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#ifdef CONFIG_PPC_BOOK3E 4757e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#define VMALLOC_SIZE (KERN_VIRT_SIZE >> 2) 4857e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#else 4957e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#define VMALLOC_SIZE (KERN_VIRT_SIZE >> 1) 5057e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#endif 5157e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#define VMALLOC_END (VMALLOC_START + VMALLOC_SIZE) 5257e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt 5357e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt/* 5457e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt * The second half of the kernel virtual space is used for IO mappings, 5557e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt * it's itself carved into the PIO region (ISA and PHB IO space) and 5657e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt * the ioremap space 573d5134ee8341bffc4f539049abb9e90d469b448dBenjamin Herrenschmidt * 5857e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt * ISA_IO_BASE = KERN_IO_START, 64K reserved area 593d5134ee8341bffc4f539049abb9e90d469b448dBenjamin Herrenschmidt * PHB_IO_BASE = ISA_IO_BASE + 64K to ISA_IO_BASE + 2G, PHB IO spaces 603d5134ee8341bffc4f539049abb9e90d469b448dBenjamin Herrenschmidt * IOREMAP_BASE = ISA_IO_BASE + 2G to VMALLOC_START + PGTABLE_RANGE 61f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson */ 6257e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#define KERN_IO_START (KERN_VIRT_START + (KERN_VIRT_SIZE >> 1)) 633d5134ee8341bffc4f539049abb9e90d469b448dBenjamin Herrenschmidt#define FULL_IO_SIZE 0x80000000ul 6457e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#define ISA_IO_BASE (KERN_IO_START) 6557e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#define ISA_IO_END (KERN_IO_START + 0x10000ul) 663d5134ee8341bffc4f539049abb9e90d469b448dBenjamin Herrenschmidt#define PHB_IO_BASE (ISA_IO_END) 6757e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#define PHB_IO_END (KERN_IO_START + FULL_IO_SIZE) 683d5134ee8341bffc4f539049abb9e90d469b448dBenjamin Herrenschmidt#define IOREMAP_BASE (PHB_IO_END) 6957e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#define IOREMAP_END (KERN_VIRT_START + KERN_VIRT_SIZE) 7057e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt 71f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 72f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* 73f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * Region IDs 74f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson */ 75f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define REGION_SHIFT 60UL 76f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define REGION_MASK (0xfUL << REGION_SHIFT) 77f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define REGION_ID(ea) (((unsigned long)(ea)) >> REGION_SHIFT) 78f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 79f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define VMALLOC_REGION_ID (REGION_ID(VMALLOC_START)) 80f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define KERNEL_REGION_ID (REGION_ID(PAGE_OFFSET)) 8132a74949b7337726e76d69f51c48715431126c6cBenjamin Herrenschmidt#define VMEMMAP_REGION_ID (0xfUL) /* Server only */ 82f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define USER_REGION_ID (0UL) 83f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 84f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* 8557e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt * Defines the address of the vmemap area, in its own region on 8657e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt * hash table CPUs and after the vmalloc space on Book3E 87d29eff7bca60c9ee401d691d4562a4abca8de543Andy Whitcroft */ 8857e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#ifdef CONFIG_PPC_BOOK3E 8957e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#define VMEMMAP_BASE VMALLOC_END 9057e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#define VMEMMAP_END KERN_IO_START 9157e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#else 92cec08e7a948326b01555be6311480aa08e637de2Benjamin Herrenschmidt#define VMEMMAP_BASE (VMEMMAP_REGION_ID << REGION_SHIFT) 9357e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#endif 94cec08e7a948326b01555be6311480aa08e637de2Benjamin Herrenschmidt#define vmemmap ((struct page *)VMEMMAP_BASE) 95cec08e7a948326b01555be6311480aa08e637de2Benjamin Herrenschmidt 96d29eff7bca60c9ee401d691d4562a4abca8de543Andy Whitcroft 97d29eff7bca60c9ee401d691d4562a4abca8de543Andy Whitcroft/* 98c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt * Include the PTE bits definitions 99f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson */ 10057e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#ifdef CONFIG_PPC_BOOK3S 101c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#include <asm/pte-hash64.h> 10257e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#else 10357e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#include <asm/pte-book3e.h> 10457e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#endif 10571087002cf807e25056dba4e4028a9f204dc9ffdBenjamin Herrenschmidt#include <asm/pte-common.h> 106c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt 10794ee815c05c9387931e549d83312d30009ed86e9Benjamin Herrenschmidt#ifdef CONFIG_PPC_MM_SLICES 108f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define HAVE_ARCH_UNMAPPED_AREA 109f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN 11094ee815c05c9387931e549d83312d30009ed86e9Benjamin Herrenschmidt#endif /* CONFIG_PPC_MM_SLICES */ 111f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 112f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#ifndef __ASSEMBLY__ 113f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 114f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* 115c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt * This is the default implementation of various PTE accessors, it's 116c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt * used in all cases except Book3S with 64K pages where we have a 117c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt * concept of sub-pages 118c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt */ 119c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#ifndef __real_pte 120c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt 121c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#ifdef STRICT_MM_TYPECHECKS 122c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#define __real_pte(e,p) ((real_pte_t){(e)}) 123c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#define __rpte_to_pte(r) ((r).pte) 124c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#else 125c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#define __real_pte(e,p) (e) 126c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#define __rpte_to_pte(r) (__pte(r)) 127c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#endif 128c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#define __rpte_to_hidx(r,index) (pte_val(__rpte_to_pte(r)) >> 12) 129c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt 130c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#define pte_iterate_hashed_subpages(rpte, psize, va, index, shift) \ 131c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt do { \ 132c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt index = 0; \ 133c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt shift = mmu_psize_defs[psize].shift; \ 134c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt 135c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#define pte_iterate_hashed_end() } while(0) 136c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt 137c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#ifdef CONFIG_PPC_HAS_HASH_64K 138c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#define pte_pagesize_index(mm, addr, pte) get_slice_psize(mm, addr) 139c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#else 140c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#define pte_pagesize_index(mm, addr, pte) MMU_PAGE_4K 141c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#endif 142c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt 143c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#endif /* __real_pte */ 144c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt 145c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt 146f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* pte_clear moved to later in this file */ 147f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 148f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define PMD_BAD_BITS (PTE_TABLE_SIZE-1) 149f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define PUD_BAD_BITS (PMD_TABLE_SIZE-1) 150f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 151f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pmd_set(pmdp, pmdval) (pmd_val(*(pmdp)) = (pmdval)) 152f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pmd_none(pmd) (!pmd_val(pmd)) 153f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pmd_bad(pmd) (!is_kernel_addr(pmd_val(pmd)) \ 154f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson || (pmd_val(pmd) & PMD_BAD_BITS)) 155f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pmd_present(pmd) (pmd_val(pmd) != 0) 156f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pmd_clear(pmdp) (pmd_val(*(pmdp)) = 0) 157f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pmd_page_vaddr(pmd) (pmd_val(pmd) & ~PMD_MASKED_BITS) 158074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.Vextern struct page *pmd_page(pmd_t pmd); 159f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 160f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pud_set(pudp, pudval) (pud_val(*(pudp)) = (pudval)) 161f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pud_none(pud) (!pud_val(pud)) 162f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pud_bad(pud) (!is_kernel_addr(pud_val(pud)) \ 163f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson || (pud_val(pud) & PUD_BAD_BITS)) 164f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pud_present(pud) (pud_val(pud) != 0) 165f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pud_clear(pudp) (pud_val(*(pudp)) = 0) 166f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pud_page_vaddr(pud) (pud_val(pud) & ~PUD_MASKED_BITS) 167f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pud_page(pud) virt_to_page(pud_page_vaddr(pud)) 168f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 169f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pgd_set(pgdp, pudp) ({pgd_val(*(pgdp)) = (unsigned long)(pudp);}) 170f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 171f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* 172f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * Find an entry in a page-table-directory. We combine the address region 173f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * (the high order N bits) and the pgd portion of the address. 174f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson */ 1750e5f35d0e4a8179cdfac115023f418126419e659Aneesh Kumar K.V#define pgd_index(address) (((address) >> (PGDIR_SHIFT)) & (PTRS_PER_PGD - 1)) 176f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 177f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address)) 178f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 179f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pmd_offset(pudp,addr) \ 180f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson (((pmd_t *) pud_page_vaddr(*(pudp))) + (((addr) >> PMD_SHIFT) & (PTRS_PER_PMD - 1))) 181f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 182f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pte_offset_kernel(dir,addr) \ 183f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson (((pte_t *) pmd_page_vaddr(*(dir))) + (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))) 184f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 185f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pte_offset_map(dir,addr) pte_offset_kernel((dir), (addr)) 186f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pte_unmap(pte) do { } while(0) 187f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 188f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* to find an entry in a kernel page-table-directory */ 189f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* This now only contains the vmalloc pages */ 190f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pgd_offset_k(address) pgd_offset(&init_mm, address) 19178f1dbde9fd020419313c2a0c3b602ea2427118fAneesh Kumar K.Vextern void hpte_need_flush(struct mm_struct *mm, unsigned long addr, 19278f1dbde9fd020419313c2a0c3b602ea2427118fAneesh Kumar K.V pte_t *ptep, unsigned long pte, int huge); 193f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 194f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* Atomic PTE updates */ 195f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibsonstatic inline unsigned long pte_update(struct mm_struct *mm, 196f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson unsigned long addr, 197f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson pte_t *ptep, unsigned long clr, 19888247e8d7ba6639f2c199e147ebbc91f7673150cAneesh Kumar K.V unsigned long set, 199f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson int huge) 200f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson{ 201a033a487f8ae79800a15774cb6565cbbca685fc6Benjamin Herrenschmidt#ifdef PTE_ATOMIC_UPDATES 202f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson unsigned long old, tmp; 203f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 204f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson __asm__ __volatile__( 205f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson "1: ldarx %0,0,%3 # pte_update\n\ 206f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson andi. %1,%0,%6\n\ 207f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson bne- 1b \n\ 208f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson andc %1,%0,%4 \n\ 20988247e8d7ba6639f2c199e147ebbc91f7673150cAneesh Kumar K.V or %1,%1,%7\n\ 210f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson stdcx. %1,0,%3 \n\ 211f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson bne- 1b" 212f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson : "=&r" (old), "=&r" (tmp), "=m" (*ptep) 21388247e8d7ba6639f2c199e147ebbc91f7673150cAneesh Kumar K.V : "r" (ptep), "r" (clr), "m" (*ptep), "i" (_PAGE_BUSY), "r" (set) 214f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson : "cc" ); 215a033a487f8ae79800a15774cb6565cbbca685fc6Benjamin Herrenschmidt#else 216a033a487f8ae79800a15774cb6565cbbca685fc6Benjamin Herrenschmidt unsigned long old = pte_val(*ptep); 21788247e8d7ba6639f2c199e147ebbc91f7673150cAneesh Kumar K.V *ptep = __pte((old & ~clr) | set); 218a033a487f8ae79800a15774cb6565cbbca685fc6Benjamin Herrenschmidt#endif 2198d30c14cab30d405a05f2aaceda1e9ad57800f36Benjamin Herrenschmidt /* huge pages use the old page table lock */ 2208d30c14cab30d405a05f2aaceda1e9ad57800f36Benjamin Herrenschmidt if (!huge) 2218d30c14cab30d405a05f2aaceda1e9ad57800f36Benjamin Herrenschmidt assert_pte_locked(mm, addr); 2228d30c14cab30d405a05f2aaceda1e9ad57800f36Benjamin Herrenschmidt 223944916858a430a0627e483657d4cfa2cd2dfb4f7Benjamin Herrenschmidt#ifdef CONFIG_PPC_STD_MMU_64 224f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson if (old & _PAGE_HASHPTE) 225f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson hpte_need_flush(mm, addr, ptep, old, huge); 226944916858a430a0627e483657d4cfa2cd2dfb4f7Benjamin Herrenschmidt#endif 227944916858a430a0627e483657d4cfa2cd2dfb4f7Benjamin Herrenschmidt 228f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson return old; 229f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson} 230f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 231f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibsonstatic inline int __ptep_test_and_clear_young(struct mm_struct *mm, 232f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson unsigned long addr, pte_t *ptep) 233f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson{ 234f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson unsigned long old; 235f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 23688247e8d7ba6639f2c199e147ebbc91f7673150cAneesh Kumar K.V if ((pte_val(*ptep) & (_PAGE_ACCESSED | _PAGE_HASHPTE)) == 0) 237f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson return 0; 23888247e8d7ba6639f2c199e147ebbc91f7673150cAneesh Kumar K.V old = pte_update(mm, addr, ptep, _PAGE_ACCESSED, 0, 0); 239f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson return (old & _PAGE_ACCESSED) != 0; 240f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson} 241f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG 242f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define ptep_test_and_clear_young(__vma, __addr, __ptep) \ 243f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson({ \ 244f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson int __r; \ 245f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson __r = __ptep_test_and_clear_young((__vma)->vm_mm, __addr, __ptep); \ 246f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson __r; \ 247f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson}) 248f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 249f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define __HAVE_ARCH_PTEP_SET_WRPROTECT 250f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibsonstatic inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, 251f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson pte_t *ptep) 252f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson{ 253f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 2542a2c29c1a581319f4485af55e8d628d89e8f2583Stratos Psomadakis if ((pte_val(*ptep) & _PAGE_RW) == 0) 2552a2c29c1a581319f4485af55e8d628d89e8f2583Stratos Psomadakis return; 2562a2c29c1a581319f4485af55e8d628d89e8f2583Stratos Psomadakis 25788247e8d7ba6639f2c199e147ebbc91f7673150cAneesh Kumar K.V pte_update(mm, addr, ptep, _PAGE_RW, 0, 0); 258f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson} 259f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 260016b33c4958681c24056abed8ec95844a0da80a3Andy Whitcroftstatic inline void huge_ptep_set_wrprotect(struct mm_struct *mm, 261016b33c4958681c24056abed8ec95844a0da80a3Andy Whitcroft unsigned long addr, pte_t *ptep) 262016b33c4958681c24056abed8ec95844a0da80a3Andy Whitcroft{ 26386df86424939d316b1f6cfac1b6204f0c7dee317David Gibson if ((pte_val(*ptep) & _PAGE_RW) == 0) 26486df86424939d316b1f6cfac1b6204f0c7dee317David Gibson return; 2652a2c29c1a581319f4485af55e8d628d89e8f2583Stratos Psomadakis 26688247e8d7ba6639f2c199e147ebbc91f7673150cAneesh Kumar K.V pte_update(mm, addr, ptep, _PAGE_RW, 0, 1); 267016b33c4958681c24056abed8ec95844a0da80a3Andy Whitcroft} 268f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 269f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* 270f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * We currently remove entries from the hashtable regardless of whether 271f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * the entry was young or dirty. The generic routines only flush if the 272f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * entry was young or dirty which is not good enough. 273f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * 274f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * We should be more intelligent about this but for the moment we override 275f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * these functions and force a tlb flush unconditionally 276f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson */ 277f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH 278f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define ptep_clear_flush_young(__vma, __address, __ptep) \ 279f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson({ \ 280f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson int __young = __ptep_test_and_clear_young((__vma)->vm_mm, __address, \ 281f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson __ptep); \ 282f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson __young; \ 283f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson}) 284f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 285f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define __HAVE_ARCH_PTEP_GET_AND_CLEAR 286f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibsonstatic inline pte_t ptep_get_and_clear(struct mm_struct *mm, 287f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson unsigned long addr, pte_t *ptep) 288f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson{ 28988247e8d7ba6639f2c199e147ebbc91f7673150cAneesh Kumar K.V unsigned long old = pte_update(mm, addr, ptep, ~0UL, 0, 0); 290f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson return __pte(old); 291f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson} 292f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 293f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibsonstatic inline void pte_clear(struct mm_struct *mm, unsigned long addr, 294f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson pte_t * ptep) 295f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson{ 29688247e8d7ba6639f2c199e147ebbc91f7673150cAneesh Kumar K.V pte_update(mm, addr, ptep, ~0UL, 0, 0); 297f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson} 298f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 299f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 300f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* Set the dirty and/or accessed bits atomically in a linux PTE, this 301f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * function doesn't need to flush the hash entry 302f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson */ 3038d30c14cab30d405a05f2aaceda1e9ad57800f36Benjamin Herrenschmidtstatic inline void __ptep_set_access_flags(pte_t *ptep, pte_t entry) 304f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson{ 305f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson unsigned long bits = pte_val(entry) & 306ea3cc330ac0cd521ff07c7cd432a1848c19a7e92Benjamin Herrenschmidt (_PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_RW | _PAGE_EXEC); 307a033a487f8ae79800a15774cb6565cbbca685fc6Benjamin Herrenschmidt 308a033a487f8ae79800a15774cb6565cbbca685fc6Benjamin Herrenschmidt#ifdef PTE_ATOMIC_UPDATES 309f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson unsigned long old, tmp; 310f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 311f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson __asm__ __volatile__( 312f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson "1: ldarx %0,0,%4\n\ 313f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson andi. %1,%0,%6\n\ 314f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson bne- 1b \n\ 315f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson or %0,%3,%0\n\ 316f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson stdcx. %0,0,%4\n\ 317f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson bne- 1b" 318f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson :"=&r" (old), "=&r" (tmp), "=m" (*ptep) 319f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson :"r" (bits), "r" (ptep), "m" (*ptep), "i" (_PAGE_BUSY) 320f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson :"cc"); 321a033a487f8ae79800a15774cb6565cbbca685fc6Benjamin Herrenschmidt#else 322a033a487f8ae79800a15774cb6565cbbca685fc6Benjamin Herrenschmidt unsigned long old = pte_val(*ptep); 323a033a487f8ae79800a15774cb6565cbbca685fc6Benjamin Herrenschmidt *ptep = __pte(old | bits); 324a033a487f8ae79800a15774cb6565cbbca685fc6Benjamin Herrenschmidt#endif 325f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson} 326f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 327f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define __HAVE_ARCH_PTE_SAME 328f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pte_same(A,B) (((pte_val(A) ^ pte_val(B)) & ~_PAGE_HPTEFLAGS) == 0) 329f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 330f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pte_ERROR(e) \ 331a7696b36c01316308f2b9f2009ce38cb01fd7a3fAnton Blanchard pr_err("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e)) 332f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pmd_ERROR(e) \ 333a7696b36c01316308f2b9f2009ce38cb01fd7a3fAnton Blanchard pr_err("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, pmd_val(e)) 334f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pgd_ERROR(e) \ 335a7696b36c01316308f2b9f2009ce38cb01fd7a3fAnton Blanchard pr_err("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e)) 336f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 337f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* Encode and de-code a swap entry */ 338f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define __swp_type(entry) (((entry).val >> 1) & 0x3f) 339f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define __swp_offset(entry) ((entry).val >> 8) 340f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define __swp_entry(type, offset) ((swp_entry_t){((type)<< 1)|((offset)<<8)}) 341f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define __pte_to_swp_entry(pte) ((swp_entry_t){pte_val(pte) >> PTE_RPN_SHIFT}) 342f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define __swp_entry_to_pte(x) ((pte_t) { (x).val << PTE_RPN_SHIFT }) 343f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pte_to_pgoff(pte) (pte_val(pte) >> PTE_RPN_SHIFT) 344f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pgoff_to_pte(off) ((pte_t) {((off) << PTE_RPN_SHIFT)|_PAGE_FILE}) 345f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define PTE_FILE_MAX_BITS (BITS_PER_LONG - PTE_RPN_SHIFT) 346f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 347a0668cdc154e54bf0c85182e0535eea237d53146David Gibsonvoid pgtable_cache_add(unsigned shift, void (*ctor)(void *)); 348f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibsonvoid pgtable_cache_init(void); 349f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#endif /* __ASSEMBLY__ */ 350f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 351074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V/* 352074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V * THP pages can't be special. So use the _PAGE_SPECIAL 353074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V */ 354074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V#define _PAGE_SPLITTING _PAGE_SPECIAL 355074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V 356074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V/* 357074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V * We need to differentiate between explicit huge page and THP huge 358074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V * page, since THP huge page also need to track real subpage details 359074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V */ 360074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V#define _PAGE_THP_HUGE _PAGE_4K_PFN 361074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V 362074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V/* 363074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V * set of bits not changed in pmd_modify. 364074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V */ 365074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V#define _HPAGE_CHG_MASK (PTE_RPN_MASK | _PAGE_HPTEFLAGS | \ 366074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_SPLITTING | \ 367074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V _PAGE_THP_HUGE) 368074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V 369074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V#ifndef __ASSEMBLY__ 370074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V/* 371074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V * The linux hugepage PMD now include the pmd entries followed by the address 372074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V * to the stashed pgtable_t. The stashed pgtable_t contains the hpte bits. 373074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V * [ 1 bit secondary | 3 bit hidx | 1 bit valid | 000]. We use one byte per 374074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V * each HPTE entry. With 16MB hugepage and 64K HPTE we need 256 entries and 375074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V * with 4K HPTE we need 4096 entries. Both will fit in a 4K pgtable_t. 376074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V * 377074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V * The last three bits are intentionally left to zero. This memory location 378074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V * are also used as normal page PTE pointers. So if we have any pointers 379074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V * left around while we collapse a hugepage, we need to make sure 380074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V * _PAGE_PRESENT and _PAGE_FILE bits of that are zero when we look at them 381074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V */ 382074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.Vstatic inline unsigned int hpte_valid(unsigned char *hpte_slot_array, int index) 383074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V{ 384074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V return (hpte_slot_array[index] >> 3) & 0x1; 385074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V} 386074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V 387074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.Vstatic inline unsigned int hpte_hash_index(unsigned char *hpte_slot_array, 388074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V int index) 389074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V{ 390074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V return hpte_slot_array[index] >> 4; 391074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V} 392074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V 393074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.Vstatic inline void mark_hpte_slot_valid(unsigned char *hpte_slot_array, 394074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V unsigned int index, unsigned int hidx) 395074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V{ 396074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V hpte_slot_array[index] = hidx << 4 | 0x1 << 3; 397074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V} 398074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V 3998e0861fa3c4edfc2f30dd4cf4d58d3929f7c1b23Alexey Kardashevskiystruct page *realmode_pfn_to_page(unsigned long pfn); 4008e0861fa3c4edfc2f30dd4cf4d58d3929f7c1b23Alexey Kardashevskiy 401074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.Vstatic inline char *get_hpte_slot_array(pmd_t *pmdp) 402074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V{ 403074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V /* 404074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V * The hpte hindex is stored in the pgtable whose address is in the 405074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V * second half of the PMD 406074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V * 407074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V * Order this load with the test for pmd_trans_huge in the caller 408074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V */ 409074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V smp_rmb(); 410074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V return *(char **)(pmdp + PTRS_PER_PMD); 411074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V 412074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V 413074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V} 414074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V 415074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.Vextern void hpte_do_hugepage_flush(struct mm_struct *mm, unsigned long addr, 416fc0479557572375100ef16c71170b29a98e0d69aAneesh Kumar K.V pmd_t *pmdp, unsigned long old_pmd); 417074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V#ifdef CONFIG_TRANSPARENT_HUGEPAGE 418074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.Vextern pmd_t pfn_pmd(unsigned long pfn, pgprot_t pgprot); 419074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.Vextern pmd_t mk_pmd(struct page *page, pgprot_t pgprot); 420074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.Vextern pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot); 421074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.Vextern void set_pmd_at(struct mm_struct *mm, unsigned long addr, 422074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V pmd_t *pmdp, pmd_t pmd); 423074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.Vextern void update_mmu_cache_pmd(struct vm_area_struct *vma, unsigned long addr, 424074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V pmd_t *pmd); 425074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V 426074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.Vstatic inline int pmd_trans_huge(pmd_t pmd) 427074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V{ 428074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V /* 429074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V * leaf pte for huge page, bottom two bits != 00 430074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V */ 431074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V return (pmd_val(pmd) & 0x3) && (pmd_val(pmd) & _PAGE_THP_HUGE); 432074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V} 433074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V 434074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.Vstatic inline int pmd_large(pmd_t pmd) 435074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V{ 436074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V /* 437074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V * leaf pte for huge page, bottom two bits != 00 438074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V */ 439074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V if (pmd_trans_huge(pmd)) 440074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V return pmd_val(pmd) & _PAGE_PRESENT; 441074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V return 0; 442074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V} 443074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V 444074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.Vstatic inline int pmd_trans_splitting(pmd_t pmd) 445074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V{ 446074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V if (pmd_trans_huge(pmd)) 447074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V return pmd_val(pmd) & _PAGE_SPLITTING; 448074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V return 0; 449074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V} 450074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V 451437d496457a30ce9ccccb94b2373c201b2558392Aneesh Kumar K.Vextern int has_transparent_hugepage(void); 452074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V#endif /* CONFIG_TRANSPARENT_HUGEPAGE */ 453074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V 454074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.Vstatic inline pte_t pmd_pte(pmd_t pmd) 455074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V{ 456074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V return __pte(pmd_val(pmd)); 457074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V} 458074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V 459074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.Vstatic inline pmd_t pte_pmd(pte_t pte) 460074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V{ 461074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V return __pmd(pte_val(pte)); 462074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V} 463074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V 464074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.Vstatic inline pte_t *pmdp_ptep(pmd_t *pmd) 465074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V{ 466074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V return (pte_t *)pmd; 467074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V} 468074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V 469074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V#define pmd_pfn(pmd) pte_pfn(pmd_pte(pmd)) 470074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V#define pmd_young(pmd) pte_young(pmd_pte(pmd)) 471074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V#define pmd_mkold(pmd) pte_pmd(pte_mkold(pmd_pte(pmd))) 472074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V#define pmd_wrprotect(pmd) pte_pmd(pte_wrprotect(pmd_pte(pmd))) 473074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V#define pmd_mkdirty(pmd) pte_pmd(pte_mkdirty(pmd_pte(pmd))) 474074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V#define pmd_mkyoung(pmd) pte_pmd(pte_mkyoung(pmd_pte(pmd))) 475074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V#define pmd_mkwrite(pmd) pte_pmd(pte_mkwrite(pmd_pte(pmd))) 476074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V 477074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V#define __HAVE_ARCH_PMD_WRITE 478074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V#define pmd_write(pmd) pte_write(pmd_pte(pmd)) 479074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V 480074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.Vstatic inline pmd_t pmd_mkhuge(pmd_t pmd) 481074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V{ 482074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V /* Do nothing, mk_pmd() does this part. */ 483074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V return pmd; 484074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V} 485074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V 486074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.Vstatic inline pmd_t pmd_mknotpresent(pmd_t pmd) 487074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V{ 488074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V pmd_val(pmd) &= ~_PAGE_PRESENT; 489074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V return pmd; 490074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V} 491074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V 492074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.Vstatic inline pmd_t pmd_mksplitting(pmd_t pmd) 493074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V{ 494074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V pmd_val(pmd) |= _PAGE_SPLITTING; 495074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V return pmd; 496074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V} 497074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V 498074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V#define __HAVE_ARCH_PMD_SAME 499074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.Vstatic inline int pmd_same(pmd_t pmd_a, pmd_t pmd_b) 500074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V{ 501074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V return (((pmd_val(pmd_a) ^ pmd_val(pmd_b)) & ~_PAGE_HPTEFLAGS) == 0); 502074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V} 503074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V 504074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V#define __HAVE_ARCH_PMDP_SET_ACCESS_FLAGS 505074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.Vextern int pmdp_set_access_flags(struct vm_area_struct *vma, 506074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V unsigned long address, pmd_t *pmdp, 507074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V pmd_t entry, int dirty); 508074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V 509074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.Vextern unsigned long pmd_hugepage_update(struct mm_struct *mm, 510074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V unsigned long addr, 51188247e8d7ba6639f2c199e147ebbc91f7673150cAneesh Kumar K.V pmd_t *pmdp, 51288247e8d7ba6639f2c199e147ebbc91f7673150cAneesh Kumar K.V unsigned long clr, 51388247e8d7ba6639f2c199e147ebbc91f7673150cAneesh Kumar K.V unsigned long set); 514074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V 515074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.Vstatic inline int __pmdp_test_and_clear_young(struct mm_struct *mm, 516074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V unsigned long addr, pmd_t *pmdp) 517074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V{ 518074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V unsigned long old; 519074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V 520074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V if ((pmd_val(*pmdp) & (_PAGE_ACCESSED | _PAGE_HASHPTE)) == 0) 521074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V return 0; 52288247e8d7ba6639f2c199e147ebbc91f7673150cAneesh Kumar K.V old = pmd_hugepage_update(mm, addr, pmdp, _PAGE_ACCESSED, 0); 523074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V return ((old & _PAGE_ACCESSED) != 0); 524074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V} 525074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V 526074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V#define __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG 527074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.Vextern int pmdp_test_and_clear_young(struct vm_area_struct *vma, 528074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V unsigned long address, pmd_t *pmdp); 529074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V#define __HAVE_ARCH_PMDP_CLEAR_YOUNG_FLUSH 530074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.Vextern int pmdp_clear_flush_young(struct vm_area_struct *vma, 531074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V unsigned long address, pmd_t *pmdp); 532074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V 533074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V#define __HAVE_ARCH_PMDP_GET_AND_CLEAR 534074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.Vextern pmd_t pmdp_get_and_clear(struct mm_struct *mm, 535074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V unsigned long addr, pmd_t *pmdp); 536074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V 537074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V#define __HAVE_ARCH_PMDP_CLEAR_FLUSH 538074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.Vextern pmd_t pmdp_clear_flush(struct vm_area_struct *vma, unsigned long address, 539074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V pmd_t *pmdp); 540074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V 541074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V#define __HAVE_ARCH_PMDP_SET_WRPROTECT 542074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.Vstatic inline void pmdp_set_wrprotect(struct mm_struct *mm, unsigned long addr, 543074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V pmd_t *pmdp) 544074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V{ 545074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V 546074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V if ((pmd_val(*pmdp) & _PAGE_RW) == 0) 547074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V return; 548074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V 54988247e8d7ba6639f2c199e147ebbc91f7673150cAneesh Kumar K.V pmd_hugepage_update(mm, addr, pmdp, _PAGE_RW, 0); 550074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V} 551074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V 552074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V#define __HAVE_ARCH_PMDP_SPLITTING_FLUSH 553074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.Vextern void pmdp_splitting_flush(struct vm_area_struct *vma, 554074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V unsigned long address, pmd_t *pmdp); 555074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V 556074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V#define __HAVE_ARCH_PGTABLE_DEPOSIT 557074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.Vextern void pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp, 558074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V pgtable_t pgtable); 559074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V#define __HAVE_ARCH_PGTABLE_WITHDRAW 560074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.Vextern pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp); 561074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V 562074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V#define __HAVE_ARCH_PMDP_INVALIDATE 563074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.Vextern void pmdp_invalidate(struct vm_area_struct *vma, unsigned long address, 564074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V pmd_t *pmdp); 565b3084f4db3aeb991c507ca774337c7e7893ed04fAneesh Kumar K.V 566b3084f4db3aeb991c507ca774337c7e7893ed04fAneesh Kumar K.V#define pmd_move_must_withdraw pmd_move_must_withdraw 567fd120dc2e205d2318a8b47d6d8098b789e3af67dLi Zhongstruct spinlock; 568fd120dc2e205d2318a8b47d6d8098b789e3af67dLi Zhongstatic inline int pmd_move_must_withdraw(struct spinlock *new_pmd_ptl, 569fd120dc2e205d2318a8b47d6d8098b789e3af67dLi Zhong struct spinlock *old_pmd_ptl) 570b3084f4db3aeb991c507ca774337c7e7893ed04fAneesh Kumar K.V{ 571b3084f4db3aeb991c507ca774337c7e7893ed04fAneesh Kumar K.V /* 572b3084f4db3aeb991c507ca774337c7e7893ed04fAneesh Kumar K.V * Archs like ppc64 use pgtable to store per pmd 573b3084f4db3aeb991c507ca774337c7e7893ed04fAneesh Kumar K.V * specific information. So when we switch the pmd, 574b3084f4db3aeb991c507ca774337c7e7893ed04fAneesh Kumar K.V * we should also withdraw and deposit the pgtable 575b3084f4db3aeb991c507ca774337c7e7893ed04fAneesh Kumar K.V */ 576b3084f4db3aeb991c507ca774337c7e7893ed04fAneesh Kumar K.V return true; 577b3084f4db3aeb991c507ca774337c7e7893ed04fAneesh Kumar K.V} 578b3084f4db3aeb991c507ca774337c7e7893ed04fAneesh Kumar K.V 579074c2eae3e9b66c03a17a12df8f2cd19382b68abAneesh Kumar K.V#endif /* __ASSEMBLY__ */ 580f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#endif /* _ASM_POWERPC_PGTABLE_PPC64_H_ */ 581