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 13f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 14f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define FIRST_USER_ADDRESS 0 15f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 16f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* 17f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * Size of EA range mapped by our pagetables. 18f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson */ 19f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define PGTABLE_EADDR_SIZE (PTE_INDEX_SIZE + PMD_INDEX_SIZE + \ 20f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson PUD_INDEX_SIZE + PGD_INDEX_SIZE + PAGE_SHIFT) 213d5134ee8341bffc4f539049abb9e90d469b448dBenjamin Herrenschmidt#define PGTABLE_RANGE (ASM_CONST(1) << PGTABLE_EADDR_SIZE) 22f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 23c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt 24c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt/* Some sanity checking */ 25f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#if TASK_SIZE_USER64 > PGTABLE_RANGE 26f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#error TASK_SIZE_USER64 exceeds pagetable range 27f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#endif 28f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 29944916858a430a0627e483657d4cfa2cd2dfb4f7Benjamin Herrenschmidt#ifdef CONFIG_PPC_STD_MMU_64 30f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#if TASK_SIZE_USER64 > (1UL << (USER_ESID_BITS + SID_SHIFT)) 31f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#error TASK_SIZE_USER64 exceeds user VSID range 32f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#endif 33944916858a430a0627e483657d4cfa2cd2dfb4f7Benjamin Herrenschmidt#endif 34f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 35f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* 3657e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt * Define the address range of the kernel non-linear virtual area 37f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson */ 3857e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt 3957e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#ifdef CONFIG_PPC_BOOK3E 4057e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#define KERN_VIRT_START ASM_CONST(0x8000000000000000) 4157e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#else 4257e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#define KERN_VIRT_START ASM_CONST(0xD000000000000000) 4357e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#endif 4457e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#define KERN_VIRT_SIZE PGTABLE_RANGE 45f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 46f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* 4757e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt * The vmalloc space starts at the beginning of that region, and 4857e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt * occupies half of it on hash CPUs and a quarter of it on Book3E 4932a74949b7337726e76d69f51c48715431126c6cBenjamin Herrenschmidt * (we keep a quarter for the virtual memmap) 5057e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt */ 5157e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#define VMALLOC_START KERN_VIRT_START 5257e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#ifdef CONFIG_PPC_BOOK3E 5357e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#define VMALLOC_SIZE (KERN_VIRT_SIZE >> 2) 5457e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#else 5557e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#define VMALLOC_SIZE (KERN_VIRT_SIZE >> 1) 5657e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#endif 5757e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#define VMALLOC_END (VMALLOC_START + VMALLOC_SIZE) 5857e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt 5957e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt/* 6057e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt * The second half of the kernel virtual space is used for IO mappings, 6157e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt * it's itself carved into the PIO region (ISA and PHB IO space) and 6257e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt * the ioremap space 633d5134ee8341bffc4f539049abb9e90d469b448dBenjamin Herrenschmidt * 6457e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt * ISA_IO_BASE = KERN_IO_START, 64K reserved area 653d5134ee8341bffc4f539049abb9e90d469b448dBenjamin Herrenschmidt * PHB_IO_BASE = ISA_IO_BASE + 64K to ISA_IO_BASE + 2G, PHB IO spaces 663d5134ee8341bffc4f539049abb9e90d469b448dBenjamin Herrenschmidt * IOREMAP_BASE = ISA_IO_BASE + 2G to VMALLOC_START + PGTABLE_RANGE 67f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson */ 6857e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#define KERN_IO_START (KERN_VIRT_START + (KERN_VIRT_SIZE >> 1)) 693d5134ee8341bffc4f539049abb9e90d469b448dBenjamin Herrenschmidt#define FULL_IO_SIZE 0x80000000ul 7057e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#define ISA_IO_BASE (KERN_IO_START) 7157e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#define ISA_IO_END (KERN_IO_START + 0x10000ul) 723d5134ee8341bffc4f539049abb9e90d469b448dBenjamin Herrenschmidt#define PHB_IO_BASE (ISA_IO_END) 7357e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#define PHB_IO_END (KERN_IO_START + FULL_IO_SIZE) 743d5134ee8341bffc4f539049abb9e90d469b448dBenjamin Herrenschmidt#define IOREMAP_BASE (PHB_IO_END) 7557e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#define IOREMAP_END (KERN_VIRT_START + KERN_VIRT_SIZE) 7657e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt 77f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 78f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* 79f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * Region IDs 80f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson */ 81f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define REGION_SHIFT 60UL 82f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define REGION_MASK (0xfUL << REGION_SHIFT) 83f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define REGION_ID(ea) (((unsigned long)(ea)) >> REGION_SHIFT) 84f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 85f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define VMALLOC_REGION_ID (REGION_ID(VMALLOC_START)) 86f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define KERNEL_REGION_ID (REGION_ID(PAGE_OFFSET)) 8732a74949b7337726e76d69f51c48715431126c6cBenjamin Herrenschmidt#define VMEMMAP_REGION_ID (0xfUL) /* Server only */ 88f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define USER_REGION_ID (0UL) 89f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 90f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* 9157e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt * Defines the address of the vmemap area, in its own region on 9257e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt * hash table CPUs and after the vmalloc space on Book3E 93d29eff7bca60c9ee401d691d4562a4abca8de543Andy Whitcroft */ 9457e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#ifdef CONFIG_PPC_BOOK3E 9557e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#define VMEMMAP_BASE VMALLOC_END 9657e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#define VMEMMAP_END KERN_IO_START 9757e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#else 98cec08e7a948326b01555be6311480aa08e637de2Benjamin Herrenschmidt#define VMEMMAP_BASE (VMEMMAP_REGION_ID << REGION_SHIFT) 9957e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#endif 100cec08e7a948326b01555be6311480aa08e637de2Benjamin Herrenschmidt#define vmemmap ((struct page *)VMEMMAP_BASE) 101cec08e7a948326b01555be6311480aa08e637de2Benjamin Herrenschmidt 102d29eff7bca60c9ee401d691d4562a4abca8de543Andy Whitcroft 103d29eff7bca60c9ee401d691d4562a4abca8de543Andy Whitcroft/* 104c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt * Include the PTE bits definitions 105f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson */ 10657e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#ifdef CONFIG_PPC_BOOK3S 107c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#include <asm/pte-hash64.h> 10857e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#else 10957e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#include <asm/pte-book3e.h> 11057e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#endif 11171087002cf807e25056dba4e4028a9f204dc9ffdBenjamin Herrenschmidt#include <asm/pte-common.h> 112c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt 11394ee815c05c9387931e549d83312d30009ed86e9Benjamin Herrenschmidt#ifdef CONFIG_PPC_MM_SLICES 114f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define HAVE_ARCH_UNMAPPED_AREA 115f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN 11694ee815c05c9387931e549d83312d30009ed86e9Benjamin Herrenschmidt#endif /* CONFIG_PPC_MM_SLICES */ 117f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 118f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#ifndef __ASSEMBLY__ 119f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 12057e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#include <linux/stddef.h> 12157e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt#include <asm/tlbflush.h> 12257e2a99f74b0d3720c97a6aadb57ae6aad3c61eaBenjamin Herrenschmidt 123f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* 124c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt * This is the default implementation of various PTE accessors, it's 125c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt * used in all cases except Book3S with 64K pages where we have a 126c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt * concept of sub-pages 127c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt */ 128c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#ifndef __real_pte 129c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt 130c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#ifdef STRICT_MM_TYPECHECKS 131c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#define __real_pte(e,p) ((real_pte_t){(e)}) 132c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#define __rpte_to_pte(r) ((r).pte) 133c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#else 134c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#define __real_pte(e,p) (e) 135c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#define __rpte_to_pte(r) (__pte(r)) 136c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#endif 137c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#define __rpte_to_hidx(r,index) (pte_val(__rpte_to_pte(r)) >> 12) 138c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt 139c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#define pte_iterate_hashed_subpages(rpte, psize, va, index, shift) \ 140c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt do { \ 141c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt index = 0; \ 142c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt shift = mmu_psize_defs[psize].shift; \ 143c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt 144c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#define pte_iterate_hashed_end() } while(0) 145c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt 146c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#ifdef CONFIG_PPC_HAS_HASH_64K 147c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#define pte_pagesize_index(mm, addr, pte) get_slice_psize(mm, addr) 148c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#else 149c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#define pte_pagesize_index(mm, addr, pte) MMU_PAGE_4K 150c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#endif 151c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt 152c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt#endif /* __real_pte */ 153c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt 154c605782b1c3f1c18a55dc1a75b19ed0288f61ac3Benjamin Herrenschmidt 155f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* pte_clear moved to later in this file */ 156f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 157f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define PMD_BAD_BITS (PTE_TABLE_SIZE-1) 158f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define PUD_BAD_BITS (PMD_TABLE_SIZE-1) 159f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 160f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pmd_set(pmdp, pmdval) (pmd_val(*(pmdp)) = (pmdval)) 161f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pmd_none(pmd) (!pmd_val(pmd)) 162f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pmd_bad(pmd) (!is_kernel_addr(pmd_val(pmd)) \ 163f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson || (pmd_val(pmd) & PMD_BAD_BITS)) 164f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pmd_present(pmd) (pmd_val(pmd) != 0) 165f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pmd_clear(pmdp) (pmd_val(*(pmdp)) = 0) 166f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pmd_page_vaddr(pmd) (pmd_val(pmd) & ~PMD_MASKED_BITS) 167f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pmd_page(pmd) virt_to_page(pmd_page_vaddr(pmd)) 168f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 169f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pud_set(pudp, pudval) (pud_val(*(pudp)) = (pudval)) 170f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pud_none(pud) (!pud_val(pud)) 171f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pud_bad(pud) (!is_kernel_addr(pud_val(pud)) \ 172f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson || (pud_val(pud) & PUD_BAD_BITS)) 173f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pud_present(pud) (pud_val(pud) != 0) 174f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pud_clear(pudp) (pud_val(*(pudp)) = 0) 175f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pud_page_vaddr(pud) (pud_val(pud) & ~PUD_MASKED_BITS) 176f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pud_page(pud) virt_to_page(pud_page_vaddr(pud)) 177f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 178f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pgd_set(pgdp, pudp) ({pgd_val(*(pgdp)) = (unsigned long)(pudp);}) 179f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 180f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* 181f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * Find an entry in a page-table-directory. We combine the address region 182f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * (the high order N bits) and the pgd portion of the address. 183f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson */ 184f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* to avoid overflow in free_pgtables we don't use PTRS_PER_PGD here */ 185f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pgd_index(address) (((address) >> (PGDIR_SHIFT)) & 0x1ff) 186f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 187f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address)) 188f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 189f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pmd_offset(pudp,addr) \ 190f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson (((pmd_t *) pud_page_vaddr(*(pudp))) + (((addr) >> PMD_SHIFT) & (PTRS_PER_PMD - 1))) 191f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 192f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pte_offset_kernel(dir,addr) \ 193f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson (((pte_t *) pmd_page_vaddr(*(dir))) + (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))) 194f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 195f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pte_offset_map(dir,addr) pte_offset_kernel((dir), (addr)) 196f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pte_unmap(pte) do { } while(0) 197f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 198f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* to find an entry in a kernel page-table-directory */ 199f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* This now only contains the vmalloc pages */ 200f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pgd_offset_k(address) pgd_offset(&init_mm, address) 201f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 202f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 203f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* Atomic PTE updates */ 204f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibsonstatic inline unsigned long pte_update(struct mm_struct *mm, 205f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson unsigned long addr, 206f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson pte_t *ptep, unsigned long clr, 207f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson int huge) 208f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson{ 209a033a487f8ae79800a15774cb6565cbbca685fc6Benjamin Herrenschmidt#ifdef PTE_ATOMIC_UPDATES 210f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson unsigned long old, tmp; 211f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 212f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson __asm__ __volatile__( 213f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson "1: ldarx %0,0,%3 # pte_update\n\ 214f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson andi. %1,%0,%6\n\ 215f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson bne- 1b \n\ 216f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson andc %1,%0,%4 \n\ 217f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson stdcx. %1,0,%3 \n\ 218f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson bne- 1b" 219f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson : "=&r" (old), "=&r" (tmp), "=m" (*ptep) 220f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson : "r" (ptep), "r" (clr), "m" (*ptep), "i" (_PAGE_BUSY) 221f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson : "cc" ); 222a033a487f8ae79800a15774cb6565cbbca685fc6Benjamin Herrenschmidt#else 223a033a487f8ae79800a15774cb6565cbbca685fc6Benjamin Herrenschmidt unsigned long old = pte_val(*ptep); 224a033a487f8ae79800a15774cb6565cbbca685fc6Benjamin Herrenschmidt *ptep = __pte(old & ~clr); 225a033a487f8ae79800a15774cb6565cbbca685fc6Benjamin Herrenschmidt#endif 2268d30c14cab30d405a05f2aaceda1e9ad57800f36Benjamin Herrenschmidt /* huge pages use the old page table lock */ 2278d30c14cab30d405a05f2aaceda1e9ad57800f36Benjamin Herrenschmidt if (!huge) 2288d30c14cab30d405a05f2aaceda1e9ad57800f36Benjamin Herrenschmidt assert_pte_locked(mm, addr); 2298d30c14cab30d405a05f2aaceda1e9ad57800f36Benjamin Herrenschmidt 230944916858a430a0627e483657d4cfa2cd2dfb4f7Benjamin Herrenschmidt#ifdef CONFIG_PPC_STD_MMU_64 231f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson if (old & _PAGE_HASHPTE) 232f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson hpte_need_flush(mm, addr, ptep, old, huge); 233944916858a430a0627e483657d4cfa2cd2dfb4f7Benjamin Herrenschmidt#endif 234944916858a430a0627e483657d4cfa2cd2dfb4f7Benjamin Herrenschmidt 235f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson return old; 236f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson} 237f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 238f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibsonstatic inline int __ptep_test_and_clear_young(struct mm_struct *mm, 239f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson unsigned long addr, pte_t *ptep) 240f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson{ 241f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson unsigned long old; 242f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 243f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson if ((pte_val(*ptep) & (_PAGE_ACCESSED | _PAGE_HASHPTE)) == 0) 244f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson return 0; 245f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson old = pte_update(mm, addr, ptep, _PAGE_ACCESSED, 0); 246f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson return (old & _PAGE_ACCESSED) != 0; 247f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson} 248f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG 249f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define ptep_test_and_clear_young(__vma, __addr, __ptep) \ 250f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson({ \ 251f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson int __r; \ 252f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson __r = __ptep_test_and_clear_young((__vma)->vm_mm, __addr, __ptep); \ 253f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson __r; \ 254f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson}) 255f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 256f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define __HAVE_ARCH_PTEP_SET_WRPROTECT 257f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibsonstatic inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, 258f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson pte_t *ptep) 259f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson{ 260f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 2612a2c29c1a581319f4485af55e8d628d89e8f2583Stratos Psomadakis if ((pte_val(*ptep) & _PAGE_RW) == 0) 2622a2c29c1a581319f4485af55e8d628d89e8f2583Stratos Psomadakis return; 2632a2c29c1a581319f4485af55e8d628d89e8f2583Stratos Psomadakis 2642a2c29c1a581319f4485af55e8d628d89e8f2583Stratos Psomadakis pte_update(mm, addr, ptep, _PAGE_RW, 0); 265f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson} 266f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 267016b33c4958681c24056abed8ec95844a0da80a3Andy Whitcroftstatic inline void huge_ptep_set_wrprotect(struct mm_struct *mm, 268016b33c4958681c24056abed8ec95844a0da80a3Andy Whitcroft unsigned long addr, pte_t *ptep) 269016b33c4958681c24056abed8ec95844a0da80a3Andy Whitcroft{ 27086df86424939d316b1f6cfac1b6204f0c7dee317David Gibson if ((pte_val(*ptep) & _PAGE_RW) == 0) 27186df86424939d316b1f6cfac1b6204f0c7dee317David Gibson return; 2722a2c29c1a581319f4485af55e8d628d89e8f2583Stratos Psomadakis 2732a2c29c1a581319f4485af55e8d628d89e8f2583Stratos Psomadakis pte_update(mm, addr, ptep, _PAGE_RW, 1); 274016b33c4958681c24056abed8ec95844a0da80a3Andy Whitcroft} 275f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 276f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* 277f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * We currently remove entries from the hashtable regardless of whether 278f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * the entry was young or dirty. The generic routines only flush if the 279f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * entry was young or dirty which is not good enough. 280f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * 281f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * We should be more intelligent about this but for the moment we override 282f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * these functions and force a tlb flush unconditionally 283f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson */ 284f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH 285f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define ptep_clear_flush_young(__vma, __address, __ptep) \ 286f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson({ \ 287f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson int __young = __ptep_test_and_clear_young((__vma)->vm_mm, __address, \ 288f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson __ptep); \ 289f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson __young; \ 290f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson}) 291f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 292f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define __HAVE_ARCH_PTEP_GET_AND_CLEAR 293f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibsonstatic inline pte_t ptep_get_and_clear(struct mm_struct *mm, 294f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson unsigned long addr, pte_t *ptep) 295f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson{ 296f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson unsigned long old = pte_update(mm, addr, ptep, ~0UL, 0); 297f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson return __pte(old); 298f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson} 299f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 300f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibsonstatic inline void pte_clear(struct mm_struct *mm, unsigned long addr, 301f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson pte_t * ptep) 302f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson{ 303f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson pte_update(mm, addr, ptep, ~0UL, 0); 304f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson} 305f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 306f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 307f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* Set the dirty and/or accessed bits atomically in a linux PTE, this 308f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * function doesn't need to flush the hash entry 309f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson */ 3108d30c14cab30d405a05f2aaceda1e9ad57800f36Benjamin Herrenschmidtstatic inline void __ptep_set_access_flags(pte_t *ptep, pte_t entry) 311f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson{ 312f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson unsigned long bits = pte_val(entry) & 313ea3cc330ac0cd521ff07c7cd432a1848c19a7e92Benjamin Herrenschmidt (_PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_RW | _PAGE_EXEC); 314a033a487f8ae79800a15774cb6565cbbca685fc6Benjamin Herrenschmidt 315a033a487f8ae79800a15774cb6565cbbca685fc6Benjamin Herrenschmidt#ifdef PTE_ATOMIC_UPDATES 316f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson unsigned long old, tmp; 317f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 318f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson __asm__ __volatile__( 319f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson "1: ldarx %0,0,%4\n\ 320f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson andi. %1,%0,%6\n\ 321f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson bne- 1b \n\ 322f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson or %0,%3,%0\n\ 323f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson stdcx. %0,0,%4\n\ 324f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson bne- 1b" 325f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson :"=&r" (old), "=&r" (tmp), "=m" (*ptep) 326f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson :"r" (bits), "r" (ptep), "m" (*ptep), "i" (_PAGE_BUSY) 327f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson :"cc"); 328a033a487f8ae79800a15774cb6565cbbca685fc6Benjamin Herrenschmidt#else 329a033a487f8ae79800a15774cb6565cbbca685fc6Benjamin Herrenschmidt unsigned long old = pte_val(*ptep); 330a033a487f8ae79800a15774cb6565cbbca685fc6Benjamin Herrenschmidt *ptep = __pte(old | bits); 331a033a487f8ae79800a15774cb6565cbbca685fc6Benjamin Herrenschmidt#endif 332f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson} 333f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 334f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define __HAVE_ARCH_PTE_SAME 335f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pte_same(A,B) (((pte_val(A) ^ pte_val(B)) & ~_PAGE_HPTEFLAGS) == 0) 336f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 337f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pte_ERROR(e) \ 338f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e)) 339f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pmd_ERROR(e) \ 340f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson printk("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, pmd_val(e)) 341f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pgd_ERROR(e) \ 342f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e)) 343f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 344f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* Encode and de-code a swap entry */ 345f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define __swp_type(entry) (((entry).val >> 1) & 0x3f) 346f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define __swp_offset(entry) ((entry).val >> 8) 347f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define __swp_entry(type, offset) ((swp_entry_t){((type)<< 1)|((offset)<<8)}) 348f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define __pte_to_swp_entry(pte) ((swp_entry_t){pte_val(pte) >> PTE_RPN_SHIFT}) 349f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define __swp_entry_to_pte(x) ((pte_t) { (x).val << PTE_RPN_SHIFT }) 350f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pte_to_pgoff(pte) (pte_val(pte) >> PTE_RPN_SHIFT) 351f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define pgoff_to_pte(off) ((pte_t) {((off) << PTE_RPN_SHIFT)|_PAGE_FILE}) 352f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#define PTE_FILE_MAX_BITS (BITS_PER_LONG - PTE_RPN_SHIFT) 353f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 354a0668cdc154e54bf0c85182e0535eea237d53146David Gibsonvoid pgtable_cache_add(unsigned shift, void (*ctor)(void *)); 355f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibsonvoid pgtable_cache_init(void); 356f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 357f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson/* 358f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * find_linux_pte returns the address of a linux pte for a given 359f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson * effective address and directory. If not found, it returns zero. 36072632ce5a4ee8c75aa7cc17eb4473fcf625b8941Becky Bruce */ 36172632ce5a4ee8c75aa7cc17eb4473fcf625b8941Becky Brucestatic inline pte_t *find_linux_pte(pgd_t *pgdir, unsigned long ea) 362f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson{ 363f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson pgd_t *pg; 364f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson pud_t *pu; 365f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson pmd_t *pm; 366f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson pte_t *pt = NULL; 367f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 368f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson pg = pgdir + pgd_index(ea); 369f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson if (!pgd_none(*pg)) { 370f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson pu = pud_offset(pg, ea); 371f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson if (!pud_none(*pu)) { 372f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson pm = pmd_offset(pu, ea); 373f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson if (pmd_present(*pm)) 374f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson pt = pte_offset_kernel(pm, ea); 375f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson } 376f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson } 377f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson return pt; 378f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson} 379f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 380a4fe3ce7699bfe1bd88f816b55d42d8fe1dac655David Gibson#ifdef CONFIG_HUGETLB_PAGE 381a4fe3ce7699bfe1bd88f816b55d42d8fe1dac655David Gibsonpte_t *find_linux_pte_or_hugepte(pgd_t *pgdir, unsigned long ea, 382a4fe3ce7699bfe1bd88f816b55d42d8fe1dac655David Gibson unsigned *shift); 383a4fe3ce7699bfe1bd88f816b55d42d8fe1dac655David Gibson#else 384a4fe3ce7699bfe1bd88f816b55d42d8fe1dac655David Gibsonstatic inline pte_t *find_linux_pte_or_hugepte(pgd_t *pgdir, unsigned long ea, 385a4fe3ce7699bfe1bd88f816b55d42d8fe1dac655David Gibson unsigned *shift) 386a4fe3ce7699bfe1bd88f816b55d42d8fe1dac655David Gibson{ 387a4fe3ce7699bfe1bd88f816b55d42d8fe1dac655David Gibson if (shift) 388a4fe3ce7699bfe1bd88f816b55d42d8fe1dac655David Gibson *shift = 0; 389a4fe3ce7699bfe1bd88f816b55d42d8fe1dac655David Gibson return find_linux_pte(pgdir, ea); 390a4fe3ce7699bfe1bd88f816b55d42d8fe1dac655David Gibson} 391a4fe3ce7699bfe1bd88f816b55d42d8fe1dac655David Gibson#endif /* !CONFIG_HUGETLB_PAGE */ 392ce0ad7f0952581ba75ab6aee55bb1ed9bb22cf4fNick Piggin 393f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#endif /* __ASSEMBLY__ */ 394f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson 395f88df14b1f15cdeffa060580a40c1ce3e13bb79eDavid Gibson#endif /* _ASM_POWERPC_PGTABLE_PPC64_H_ */ 396