18ede0bdbSAl Viro /* 28ede0bdbSAl Viro * Copyright 2003 PathScale Inc 38ede0bdbSAl Viro * Derived from include/asm-i386/pgtable.h 48ede0bdbSAl Viro * Licensed under the GPL 58ede0bdbSAl Viro */ 68ede0bdbSAl Viro 78ede0bdbSAl Viro #ifndef __UM_PGTABLE_3LEVEL_H 88ede0bdbSAl Viro #define __UM_PGTABLE_3LEVEL_H 98ede0bdbSAl Viro 108ede0bdbSAl Viro #include <asm-generic/pgtable-nopud.h> 118ede0bdbSAl Viro 128ede0bdbSAl Viro /* PGDIR_SHIFT determines what a third-level page table entry can map */ 138ede0bdbSAl Viro 148ede0bdbSAl Viro #ifdef CONFIG_64BIT 158ede0bdbSAl Viro #define PGDIR_SHIFT 30 168ede0bdbSAl Viro #else 178ede0bdbSAl Viro #define PGDIR_SHIFT 31 188ede0bdbSAl Viro #endif 198ede0bdbSAl Viro #define PGDIR_SIZE (1UL << PGDIR_SHIFT) 208ede0bdbSAl Viro #define PGDIR_MASK (~(PGDIR_SIZE-1)) 218ede0bdbSAl Viro 228ede0bdbSAl Viro /* PMD_SHIFT determines the size of the area a second-level page table can 238ede0bdbSAl Viro * map 248ede0bdbSAl Viro */ 258ede0bdbSAl Viro 268ede0bdbSAl Viro #define PMD_SHIFT 21 278ede0bdbSAl Viro #define PMD_SIZE (1UL << PMD_SHIFT) 288ede0bdbSAl Viro #define PMD_MASK (~(PMD_SIZE-1)) 298ede0bdbSAl Viro 308ede0bdbSAl Viro /* 318ede0bdbSAl Viro * entries per page directory level 328ede0bdbSAl Viro */ 338ede0bdbSAl Viro 348ede0bdbSAl Viro #define PTRS_PER_PTE 512 358ede0bdbSAl Viro #ifdef CONFIG_64BIT 368ede0bdbSAl Viro #define PTRS_PER_PMD 512 378ede0bdbSAl Viro #define PTRS_PER_PGD 512 388ede0bdbSAl Viro #else 398ede0bdbSAl Viro #define PTRS_PER_PMD 1024 408ede0bdbSAl Viro #define PTRS_PER_PGD 1024 418ede0bdbSAl Viro #endif 428ede0bdbSAl Viro 438ede0bdbSAl Viro #define USER_PTRS_PER_PGD ((TASK_SIZE + (PGDIR_SIZE - 1)) / PGDIR_SIZE) 448ede0bdbSAl Viro #define FIRST_USER_ADDRESS 0 458ede0bdbSAl Viro 468ede0bdbSAl Viro #define pte_ERROR(e) \ 478ede0bdbSAl Viro printk("%s:%d: bad pte %p(%016lx).\n", __FILE__, __LINE__, &(e), \ 488ede0bdbSAl Viro pte_val(e)) 498ede0bdbSAl Viro #define pmd_ERROR(e) \ 508ede0bdbSAl Viro printk("%s:%d: bad pmd %p(%016lx).\n", __FILE__, __LINE__, &(e), \ 518ede0bdbSAl Viro pmd_val(e)) 528ede0bdbSAl Viro #define pgd_ERROR(e) \ 538ede0bdbSAl Viro printk("%s:%d: bad pgd %p(%016lx).\n", __FILE__, __LINE__, &(e), \ 548ede0bdbSAl Viro pgd_val(e)) 558ede0bdbSAl Viro 568ede0bdbSAl Viro #define pud_none(x) (!(pud_val(x) & ~_PAGE_NEWPAGE)) 578ede0bdbSAl Viro #define pud_bad(x) ((pud_val(x) & (~PAGE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE) 588ede0bdbSAl Viro #define pud_present(x) (pud_val(x) & _PAGE_PRESENT) 598ede0bdbSAl Viro #define pud_populate(mm, pud, pmd) \ 608ede0bdbSAl Viro set_pud(pud, __pud(_PAGE_TABLE + __pa(pmd))) 618ede0bdbSAl Viro 628ede0bdbSAl Viro #ifdef CONFIG_64BIT 638ede0bdbSAl Viro #define set_pud(pudptr, pudval) set_64bit((phys_t *) (pudptr), pud_val(pudval)) 648ede0bdbSAl Viro #else 658ede0bdbSAl Viro #define set_pud(pudptr, pudval) (*(pudptr) = (pudval)) 668ede0bdbSAl Viro #endif 678ede0bdbSAl Viro 688ede0bdbSAl Viro static inline int pgd_newpage(pgd_t pgd) 698ede0bdbSAl Viro { 708ede0bdbSAl Viro return(pgd_val(pgd) & _PAGE_NEWPAGE); 718ede0bdbSAl Viro } 728ede0bdbSAl Viro 738ede0bdbSAl Viro static inline void pgd_mkuptodate(pgd_t pgd) { pgd_val(pgd) &= ~_PAGE_NEWPAGE; } 748ede0bdbSAl Viro 758ede0bdbSAl Viro #ifdef CONFIG_64BIT 768ede0bdbSAl Viro #define set_pmd(pmdptr, pmdval) set_64bit((phys_t *) (pmdptr), pmd_val(pmdval)) 778ede0bdbSAl Viro #else 788ede0bdbSAl Viro #define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval)) 798ede0bdbSAl Viro #endif 808ede0bdbSAl Viro 818ede0bdbSAl Viro struct mm_struct; 828ede0bdbSAl Viro extern pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address); 838ede0bdbSAl Viro 848ede0bdbSAl Viro static inline void pud_clear (pud_t *pud) 858ede0bdbSAl Viro { 868ede0bdbSAl Viro set_pud(pud, __pud(_PAGE_NEWPAGE)); 878ede0bdbSAl Viro } 888ede0bdbSAl Viro 898ede0bdbSAl Viro #define pud_page(pud) phys_to_page(pud_val(pud) & PAGE_MASK) 908ede0bdbSAl Viro #define pud_page_vaddr(pud) ((unsigned long) __va(pud_val(pud) & PAGE_MASK)) 918ede0bdbSAl Viro 928ede0bdbSAl Viro /* Find an entry in the second-level page table.. */ 938ede0bdbSAl Viro #define pmd_offset(pud, address) ((pmd_t *) pud_page_vaddr(*(pud)) + \ 948ede0bdbSAl Viro pmd_index(address)) 958ede0bdbSAl Viro 968ede0bdbSAl Viro static inline unsigned long pte_pfn(pte_t pte) 978ede0bdbSAl Viro { 988ede0bdbSAl Viro return phys_to_pfn(pte_val(pte)); 998ede0bdbSAl Viro } 1008ede0bdbSAl Viro 1018ede0bdbSAl Viro static inline pte_t pfn_pte(pfn_t page_nr, pgprot_t pgprot) 1028ede0bdbSAl Viro { 1038ede0bdbSAl Viro pte_t pte; 1048ede0bdbSAl Viro phys_t phys = pfn_to_phys(page_nr); 1058ede0bdbSAl Viro 1068ede0bdbSAl Viro pte_set_val(pte, phys, pgprot); 1078ede0bdbSAl Viro return pte; 1088ede0bdbSAl Viro } 1098ede0bdbSAl Viro 1108ede0bdbSAl Viro static inline pmd_t pfn_pmd(pfn_t page_nr, pgprot_t pgprot) 1118ede0bdbSAl Viro { 1128ede0bdbSAl Viro return __pmd((page_nr << PAGE_SHIFT) | pgprot_val(pgprot)); 1138ede0bdbSAl Viro } 1148ede0bdbSAl Viro 1158ede0bdbSAl Viro /* 1168ede0bdbSAl Viro * Bits 0 through 3 are taken in the low part of the pte, 1178ede0bdbSAl Viro * put the 32 bits of offset into the high part. 1188ede0bdbSAl Viro */ 1198ede0bdbSAl Viro #define PTE_FILE_MAX_BITS 32 1208ede0bdbSAl Viro 1218ede0bdbSAl Viro #ifdef CONFIG_64BIT 1228ede0bdbSAl Viro 1238ede0bdbSAl Viro #define pte_to_pgoff(p) ((p).pte >> 32) 1248ede0bdbSAl Viro 1258ede0bdbSAl Viro #define pgoff_to_pte(off) ((pte_t) { ((off) << 32) | _PAGE_FILE }) 1268ede0bdbSAl Viro 1278ede0bdbSAl Viro #else 1288ede0bdbSAl Viro 1298ede0bdbSAl Viro #define pte_to_pgoff(pte) ((pte).pte_high) 1308ede0bdbSAl Viro 1318ede0bdbSAl Viro #define pgoff_to_pte(off) ((pte_t) { _PAGE_FILE, (off) }) 1328ede0bdbSAl Viro 1338ede0bdbSAl Viro #endif 1348ede0bdbSAl Viro 1358ede0bdbSAl Viro #endif 1368ede0bdbSAl Viro 1378ede0bdbSAl Viro /* 1388ede0bdbSAl Viro * Overrides for Emacs so that we follow Linus's tabbing style. 1398ede0bdbSAl Viro * Emacs will notice this stuff at the end of the file and automatically 1408ede0bdbSAl Viro * adjust the settings for this buffer only. This must remain at the end 1418ede0bdbSAl Viro * of the file. 1428ede0bdbSAl Viro * --------------------------------------------------------------------------- 1438ede0bdbSAl Viro * Local variables: 1448ede0bdbSAl Viro * c-file-style: "linux" 1458ede0bdbSAl Viro * End: 1468ede0bdbSAl Viro */ 147