1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 2deae26bfSKyle McMartin #ifndef _PARISC_PGTABLE_H 3deae26bfSKyle McMartin #define _PARISC_PGTABLE_H 4deae26bfSKyle McMartin 5bbcb03a9SQian Cai #include <asm/page.h> 6d96885e2SMike Rapoport 7d96885e2SMike Rapoport #if CONFIG_PGTABLE_LEVELS == 3 8d96885e2SMike Rapoport #include <asm-generic/pgtable-nopud.h> 9d96885e2SMike Rapoport #elif CONFIG_PGTABLE_LEVELS == 2 10d96885e2SMike Rapoport #include <asm-generic/pgtable-nopmd.h> 11d96885e2SMike Rapoport #endif 12deae26bfSKyle McMartin 13deae26bfSKyle McMartin #include <asm/fixmap.h> 14deae26bfSKyle McMartin 15deae26bfSKyle McMartin #ifndef __ASSEMBLY__ 16deae26bfSKyle McMartin /* 17deae26bfSKyle McMartin * we simulate an x86-style page table for the linux mm code 18deae26bfSKyle McMartin */ 19deae26bfSKyle McMartin 20deae26bfSKyle McMartin #include <linux/bitops.h> 2111537421SJames Bottomley #include <linux/spinlock.h> 227139bc15SJohn David Anglin #include <linux/mm_types.h> 23deae26bfSKyle McMartin #include <asm/processor.h> 24deae26bfSKyle McMartin #include <asm/cache.h> 25deae26bfSKyle McMartin 26b37d1c18SMikulas Patocka /* This is for the serialization of PxTLB broadcasts. At least on the N class 27b37d1c18SMikulas Patocka * systems, only one PxTLB inter processor broadcast can be active at any one 28b7795074SHelge Deller * time on the Merced bus. */ 29b37d1c18SMikulas Patocka extern spinlock_t pa_tlb_flush_lock; 30b37d1c18SMikulas Patocka #if defined(CONFIG_64BIT) && defined(CONFIG_SMP) 31b37d1c18SMikulas Patocka extern int pa_serialize_tlb_flushes; 32b37d1c18SMikulas Patocka #else 33b37d1c18SMikulas Patocka #define pa_serialize_tlb_flushes (0) 34b37d1c18SMikulas Patocka #endif 35b37d1c18SMikulas Patocka 36b37d1c18SMikulas Patocka #define purge_tlb_start(flags) do { \ 37b37d1c18SMikulas Patocka if (pa_serialize_tlb_flushes) \ 38b37d1c18SMikulas Patocka spin_lock_irqsave(&pa_tlb_flush_lock, flags); \ 39b37d1c18SMikulas Patocka else \ 40b37d1c18SMikulas Patocka local_irq_save(flags); \ 41b37d1c18SMikulas Patocka } while (0) 42b37d1c18SMikulas Patocka #define purge_tlb_end(flags) do { \ 43b37d1c18SMikulas Patocka if (pa_serialize_tlb_flushes) \ 44b37d1c18SMikulas Patocka spin_unlock_irqrestore(&pa_tlb_flush_lock, flags); \ 45b37d1c18SMikulas Patocka else \ 46b37d1c18SMikulas Patocka local_irq_restore(flags); \ 47b37d1c18SMikulas Patocka } while (0) 48b37d1c18SMikulas Patocka 49b37d1c18SMikulas Patocka /* Purge data and instruction TLB entries. The TLB purge instructions 50b37d1c18SMikulas Patocka * are slow on SMP machines since the purge must be broadcast to all CPUs. 5101ab6057SJohn David Anglin */ 5201ab6057SJohn David Anglin 5301ab6057SJohn David Anglin static inline void purge_tlb_entries(struct mm_struct *mm, unsigned long addr) 5401ab6057SJohn David Anglin { 55b37d1c18SMikulas Patocka unsigned long flags; 56b37d1c18SMikulas Patocka 57b37d1c18SMikulas Patocka purge_tlb_start(flags); 58360bd6c6SHelge Deller mtsp(mm->context.space_id, SR_TEMP1); 59360bd6c6SHelge Deller pdtlb(SR_TEMP1, addr); 60360bd6c6SHelge Deller pitlb(SR_TEMP1, addr); 61b37d1c18SMikulas Patocka purge_tlb_end(flags); 6201ab6057SJohn David Anglin } 6301ab6057SJohn David Anglin 6438860b2cSJohn David Anglin extern void __update_cache(pte_t pte); 6538860b2cSJohn David Anglin 66deae26bfSKyle McMartin /* Certain architectures need to do special things when PTEs 67deae26bfSKyle McMartin * within a page table are directly modified. Thus, the following 68deae26bfSKyle McMartin * hook is made available. 69deae26bfSKyle McMartin */ 70deae26bfSKyle McMartin #define set_pte(pteptr, pteval) \ 71deae26bfSKyle McMartin do { \ 72deae26bfSKyle McMartin *(pteptr) = (pteval); \ 7338860b2cSJohn David Anglin mb(); \ 74deae26bfSKyle McMartin } while(0) 757139bc15SJohn David Anglin 76b7795074SHelge Deller #define set_pte_at(mm, addr, pteptr, pteval) \ 777139bc15SJohn David Anglin do { \ 7838860b2cSJohn David Anglin if (pte_present(pteval) && \ 7938860b2cSJohn David Anglin pte_user(pteval)) \ 8038860b2cSJohn David Anglin __update_cache(pteval); \ 81b7795074SHelge Deller *(pteptr) = (pteval); \ 827139bc15SJohn David Anglin purge_tlb_entries(mm, addr); \ 837139bc15SJohn David Anglin } while (0) 84deae26bfSKyle McMartin 85deae26bfSKyle McMartin #endif /* !__ASSEMBLY__ */ 86deae26bfSKyle McMartin 87deae26bfSKyle McMartin #define pte_ERROR(e) \ 88deae26bfSKyle McMartin printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e)) 89d96885e2SMike Rapoport #if CONFIG_PGTABLE_LEVELS == 3 90deae26bfSKyle McMartin #define pmd_ERROR(e) \ 91deae26bfSKyle McMartin printk("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, (unsigned long)pmd_val(e)) 92d96885e2SMike Rapoport #endif 93deae26bfSKyle McMartin #define pgd_ERROR(e) \ 94deae26bfSKyle McMartin printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, (unsigned long)pgd_val(e)) 95deae26bfSKyle McMartin 96deae26bfSKyle McMartin /* This is the size of the initially mapped kernel memory */ 9765bf34f5SHelge Deller #if defined(CONFIG_64BIT) 9865bf34f5SHelge Deller #define KERNEL_INITIAL_ORDER 26 /* 1<<26 = 64MB */ 99332b42e4SHelge Deller #else 10065bf34f5SHelge Deller #define KERNEL_INITIAL_ORDER 25 /* 1<<25 = 32MB */ 101332b42e4SHelge Deller #endif 102deae26bfSKyle McMartin #define KERNEL_INITIAL_SIZE (1 << KERNEL_INITIAL_ORDER) 103deae26bfSKyle McMartin 104f24ffde4SKirill A. Shutemov #if CONFIG_PGTABLE_LEVELS == 3 1057bf82eb3SMatthew Wilcox (Oracle) #define PMD_TABLE_ORDER 1 1064501a7a0SMike Rapoport #define PGD_TABLE_ORDER 0 107deae26bfSKyle McMartin #else 1084501a7a0SMike Rapoport #define PGD_TABLE_ORDER 1 109deae26bfSKyle McMartin #endif 110deae26bfSKyle McMartin 111deae26bfSKyle McMartin /* Definitions for 3rd level (we use PLD here for Page Lower directory 112deae26bfSKyle McMartin * because PTE_SHIFT is used lower down to mean shift that has to be 113deae26bfSKyle McMartin * done to get usable bits out of the PTE) */ 114deae26bfSKyle McMartin #define PLD_SHIFT PAGE_SHIFT 115deae26bfSKyle McMartin #define PLD_SIZE PAGE_SIZE 116deae26bfSKyle McMartin #define BITS_PER_PTE (PAGE_SHIFT - BITS_PER_PTE_ENTRY) 117deae26bfSKyle McMartin #define PTRS_PER_PTE (1UL << BITS_PER_PTE) 118deae26bfSKyle McMartin 119deae26bfSKyle McMartin /* Definitions for 2nd level */ 120d96885e2SMike Rapoport #if CONFIG_PGTABLE_LEVELS == 3 121deae26bfSKyle McMartin #define PMD_SHIFT (PLD_SHIFT + BITS_PER_PTE) 122deae26bfSKyle McMartin #define PMD_SIZE (1UL << PMD_SHIFT) 123deae26bfSKyle McMartin #define PMD_MASK (~(PMD_SIZE-1)) 1247bf82eb3SMatthew Wilcox (Oracle) #define BITS_PER_PMD (PAGE_SHIFT + PMD_TABLE_ORDER - BITS_PER_PMD_ENTRY) 125d96885e2SMike Rapoport #define PTRS_PER_PMD (1UL << BITS_PER_PMD) 126deae26bfSKyle McMartin #else 127deae26bfSKyle McMartin #define BITS_PER_PMD 0 128deae26bfSKyle McMartin #endif 129deae26bfSKyle McMartin 130deae26bfSKyle McMartin /* Definitions for 1st level */ 131d96885e2SMike Rapoport #define PGDIR_SHIFT (PLD_SHIFT + BITS_PER_PTE + BITS_PER_PMD) 1324501a7a0SMike Rapoport #if (PGDIR_SHIFT + PAGE_SHIFT + PGD_TABLE_ORDER - BITS_PER_PGD_ENTRY) > BITS_PER_LONG 13348d27cb2SHelge Deller #define BITS_PER_PGD (BITS_PER_LONG - PGDIR_SHIFT) 13448d27cb2SHelge Deller #else 1354501a7a0SMike Rapoport #define BITS_PER_PGD (PAGE_SHIFT + PGD_TABLE_ORDER - BITS_PER_PGD_ENTRY) 13648d27cb2SHelge Deller #endif 137deae26bfSKyle McMartin #define PGDIR_SIZE (1UL << PGDIR_SHIFT) 138deae26bfSKyle McMartin #define PGDIR_MASK (~(PGDIR_SIZE-1)) 139deae26bfSKyle McMartin #define PTRS_PER_PGD (1UL << BITS_PER_PGD) 140deae26bfSKyle McMartin #define USER_PTRS_PER_PGD PTRS_PER_PGD 141deae26bfSKyle McMartin 14248d27cb2SHelge Deller #ifdef CONFIG_64BIT 143deae26bfSKyle McMartin #define MAX_ADDRBITS (PGDIR_SHIFT + BITS_PER_PGD) 144deae26bfSKyle McMartin #define MAX_ADDRESS (1UL << MAX_ADDRBITS) 145deae26bfSKyle McMartin #define SPACEID_SHIFT (MAX_ADDRBITS - 32) 14648d27cb2SHelge Deller #else 14748d27cb2SHelge Deller #define MAX_ADDRBITS (BITS_PER_LONG) 148234ff4c5SHelge Deller #define MAX_ADDRESS (1ULL << MAX_ADDRBITS) 14948d27cb2SHelge Deller #define SPACEID_SHIFT 0 15048d27cb2SHelge Deller #endif 151deae26bfSKyle McMartin 152deae26bfSKyle McMartin /* This calculates the number of initial pages we need for the initial 153deae26bfSKyle McMartin * page tables */ 154fe94cb1aSHelge Deller #if (KERNEL_INITIAL_ORDER) >= (PLD_SHIFT + BITS_PER_PTE) 155fe94cb1aSHelge Deller # define PT_INITIAL (1 << (KERNEL_INITIAL_ORDER - PLD_SHIFT - BITS_PER_PTE)) 156deae26bfSKyle McMartin #else 157deae26bfSKyle McMartin # define PT_INITIAL (1) /* all initial PTEs fit into one page */ 158deae26bfSKyle McMartin #endif 159deae26bfSKyle McMartin 160deae26bfSKyle McMartin /* 161deae26bfSKyle McMartin * pgd entries used up by user/kernel: 162deae26bfSKyle McMartin */ 163deae26bfSKyle McMartin 164deae26bfSKyle McMartin /* NB: The tlb miss handlers make certain assumptions about the order */ 165deae26bfSKyle McMartin /* of the following bits, so be careful (One example, bits 25-31 */ 166deae26bfSKyle McMartin /* are moved together in one instruction). */ 167deae26bfSKyle McMartin 168deae26bfSKyle McMartin #define _PAGE_READ_BIT 31 /* (0x001) read access allowed */ 169deae26bfSKyle McMartin #define _PAGE_WRITE_BIT 30 /* (0x002) write access allowed */ 170deae26bfSKyle McMartin #define _PAGE_EXEC_BIT 29 /* (0x004) execute access allowed */ 171deae26bfSKyle McMartin #define _PAGE_GATEWAY_BIT 28 /* (0x008) privilege promotion allowed */ 172deae26bfSKyle McMartin #define _PAGE_DMB_BIT 27 /* (0x010) Data Memory Break enable (B bit) */ 173deae26bfSKyle McMartin #define _PAGE_DIRTY_BIT 26 /* (0x020) Page Dirty (D bit) */ 174deae26bfSKyle McMartin #define _PAGE_REFTRAP_BIT 25 /* (0x040) Page Ref. Trap enable (T bit) */ 175deae26bfSKyle McMartin #define _PAGE_NO_CACHE_BIT 24 /* (0x080) Uncached Page (U bit) */ 176deae26bfSKyle McMartin #define _PAGE_ACCESSED_BIT 23 /* (0x100) Software: Page Accessed */ 177deae26bfSKyle McMartin #define _PAGE_PRESENT_BIT 22 /* (0x200) Software: translation valid */ 1781f25ad26SHelge Deller #define _PAGE_HPAGE_BIT 21 /* (0x400) Software: Huge Page */ 179deae26bfSKyle McMartin #define _PAGE_USER_BIT 20 /* (0x800) Software: User accessible page */ 18070be49f2SHelge Deller #ifdef CONFIG_HUGETLB_PAGE 18170be49f2SHelge Deller #define _PAGE_SPECIAL_BIT _PAGE_DMB_BIT /* DMB feature is currently unused */ 18270be49f2SHelge Deller #else 18370be49f2SHelge Deller #define _PAGE_SPECIAL_BIT _PAGE_HPAGE_BIT /* use unused HUGE PAGE bit */ 18470be49f2SHelge Deller #endif 185deae26bfSKyle McMartin 186deae26bfSKyle McMartin /* N.B. The bits are defined in terms of a 32 bit word above, so the */ 187deae26bfSKyle McMartin /* following macro is ok for both 32 and 64 bit. */ 188deae26bfSKyle McMartin 189deae26bfSKyle McMartin #define xlate_pabit(x) (31 - x) 190deae26bfSKyle McMartin 191deae26bfSKyle McMartin /* this defines the shift to the usable bits in the PTE it is set so 192deae26bfSKyle McMartin * that the valid bits _PAGE_PRESENT_BIT and _PAGE_USER_BIT are set 193deae26bfSKyle McMartin * to zero */ 194deae26bfSKyle McMartin #define PTE_SHIFT xlate_pabit(_PAGE_USER_BIT) 195deae26bfSKyle McMartin 196deae26bfSKyle McMartin /* PFN_PTE_SHIFT defines the shift of a PTE value to access the PFN field */ 197deae26bfSKyle McMartin #define PFN_PTE_SHIFT 12 198deae26bfSKyle McMartin 199deae26bfSKyle McMartin #define _PAGE_READ (1 << xlate_pabit(_PAGE_READ_BIT)) 200deae26bfSKyle McMartin #define _PAGE_WRITE (1 << xlate_pabit(_PAGE_WRITE_BIT)) 201deae26bfSKyle McMartin #define _PAGE_RW (_PAGE_READ | _PAGE_WRITE) 202deae26bfSKyle McMartin #define _PAGE_EXEC (1 << xlate_pabit(_PAGE_EXEC_BIT)) 203deae26bfSKyle McMartin #define _PAGE_GATEWAY (1 << xlate_pabit(_PAGE_GATEWAY_BIT)) 204deae26bfSKyle McMartin #define _PAGE_DMB (1 << xlate_pabit(_PAGE_DMB_BIT)) 205deae26bfSKyle McMartin #define _PAGE_DIRTY (1 << xlate_pabit(_PAGE_DIRTY_BIT)) 206deae26bfSKyle McMartin #define _PAGE_REFTRAP (1 << xlate_pabit(_PAGE_REFTRAP_BIT)) 207deae26bfSKyle McMartin #define _PAGE_NO_CACHE (1 << xlate_pabit(_PAGE_NO_CACHE_BIT)) 208deae26bfSKyle McMartin #define _PAGE_ACCESSED (1 << xlate_pabit(_PAGE_ACCESSED_BIT)) 209deae26bfSKyle McMartin #define _PAGE_PRESENT (1 << xlate_pabit(_PAGE_PRESENT_BIT)) 2101f25ad26SHelge Deller #define _PAGE_HUGE (1 << xlate_pabit(_PAGE_HPAGE_BIT)) 211deae26bfSKyle McMartin #define _PAGE_USER (1 << xlate_pabit(_PAGE_USER_BIT)) 21270be49f2SHelge Deller #define _PAGE_SPECIAL (1 << xlate_pabit(_PAGE_SPECIAL_BIT)) 213deae26bfSKyle McMartin 214deae26bfSKyle McMartin #define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | _PAGE_DIRTY | _PAGE_ACCESSED) 215df24e178SHelge Deller #define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_SPECIAL) 216d7dd2ff1SJames Bottomley #define _PAGE_KERNEL_RO (_PAGE_PRESENT | _PAGE_READ | _PAGE_DIRTY | _PAGE_ACCESSED) 217d7dd2ff1SJames Bottomley #define _PAGE_KERNEL_EXEC (_PAGE_KERNEL_RO | _PAGE_EXEC) 218d7dd2ff1SJames Bottomley #define _PAGE_KERNEL_RWX (_PAGE_KERNEL_EXEC | _PAGE_WRITE) 219d7dd2ff1SJames Bottomley #define _PAGE_KERNEL (_PAGE_KERNEL_RO | _PAGE_WRITE) 220deae26bfSKyle McMartin 221*6d239fc7SDavid Hildenbrand /* We borrow bit 23 to store the exclusive marker in swap PTEs. */ 222*6d239fc7SDavid Hildenbrand #define _PAGE_SWP_EXCLUSIVE _PAGE_ACCESSED 223*6d239fc7SDavid Hildenbrand 224deae26bfSKyle McMartin /* The pgd/pmd contains a ptr (in phys addr space); since all pgds/pmds 225deae26bfSKyle McMartin * are page-aligned, we don't care about the PAGE_OFFSET bits, except 226deae26bfSKyle McMartin * for a few meta-information bits, so we shift the address to be 227deae26bfSKyle McMartin * able to effectively address 40/42/44-bits of physical address space 228deae26bfSKyle McMartin * depending on 4k/16k/64k PAGE_SIZE */ 229deae26bfSKyle McMartin #define _PxD_PRESENT_BIT 31 230b7795074SHelge Deller #define _PxD_VALID_BIT 30 231deae26bfSKyle McMartin 232deae26bfSKyle McMartin #define PxD_FLAG_PRESENT (1 << xlate_pabit(_PxD_PRESENT_BIT)) 233deae26bfSKyle McMartin #define PxD_FLAG_VALID (1 << xlate_pabit(_PxD_VALID_BIT)) 234deae26bfSKyle McMartin #define PxD_FLAG_MASK (0xf) 235deae26bfSKyle McMartin #define PxD_FLAG_SHIFT (4) 2361f25ad26SHelge Deller #define PxD_VALUE_SHIFT (PFN_PTE_SHIFT-PxD_FLAG_SHIFT) 237deae26bfSKyle McMartin 238deae26bfSKyle McMartin #ifndef __ASSEMBLY__ 239deae26bfSKyle McMartin 2404dd5b673SJohn David Anglin #define PAGE_NONE __pgprot(_PAGE_PRESENT | _PAGE_USER) 2414dd5b673SJohn David Anglin #define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_READ | _PAGE_WRITE) 242deae26bfSKyle McMartin /* Others seem to make this executable, I don't know if that's correct 243deae26bfSKyle McMartin or not. The stack is mapped this way though so this is necessary 244deae26bfSKyle McMartin in the short term - dhd@linuxcare.com, 2000-08-08 */ 2454dd5b673SJohn David Anglin #define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_READ) 2464dd5b673SJohn David Anglin #define PAGE_WRITEONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_WRITE) 2474dd5b673SJohn David Anglin #define PAGE_EXECREAD __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_READ | _PAGE_EXEC) 248deae26bfSKyle McMartin #define PAGE_COPY PAGE_EXECREAD 2494dd5b673SJohn David Anglin #define PAGE_RWX __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_READ | _PAGE_WRITE | _PAGE_EXEC) 250deae26bfSKyle McMartin #define PAGE_KERNEL __pgprot(_PAGE_KERNEL) 251d7dd2ff1SJames Bottomley #define PAGE_KERNEL_EXEC __pgprot(_PAGE_KERNEL_EXEC) 252d7dd2ff1SJames Bottomley #define PAGE_KERNEL_RWX __pgprot(_PAGE_KERNEL_RWX) 253d7dd2ff1SJames Bottomley #define PAGE_KERNEL_RO __pgprot(_PAGE_KERNEL_RO) 254deae26bfSKyle McMartin #define PAGE_KERNEL_UNC __pgprot(_PAGE_KERNEL | _PAGE_NO_CACHE) 2554dd5b673SJohn David Anglin #define PAGE_GATEWAY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_GATEWAY| _PAGE_READ) 256deae26bfSKyle McMartin 257deae26bfSKyle McMartin 258deae26bfSKyle McMartin /* 259deae26bfSKyle McMartin * We could have an execute only page using "gateway - promote to priv 260deae26bfSKyle McMartin * level 3", but that is kind of silly. So, the way things are defined 261deae26bfSKyle McMartin * now, we must always have read permission for pages with execute 262deae26bfSKyle McMartin * permission. For the fun of it we'll go ahead and support write only 263deae26bfSKyle McMartin * pages. 264deae26bfSKyle McMartin */ 265deae26bfSKyle McMartin 266deae26bfSKyle McMartin /*xwr*/ 267deae26bfSKyle McMartin 268deae26bfSKyle McMartin extern pgd_t swapper_pg_dir[]; /* declared in init_task.c */ 269deae26bfSKyle McMartin 270deae26bfSKyle McMartin /* initial page tables for 0-8MB for kernel */ 271deae26bfSKyle McMartin 272deae26bfSKyle McMartin extern pte_t pg0[]; 273deae26bfSKyle McMartin 274deae26bfSKyle McMartin /* zero page used for uninitialized stuff */ 275deae26bfSKyle McMartin 276deae26bfSKyle McMartin extern unsigned long *empty_zero_page; 277deae26bfSKyle McMartin 278deae26bfSKyle McMartin /* 279deae26bfSKyle McMartin * ZERO_PAGE is a global shared page that is always zero: used 280deae26bfSKyle McMartin * for zero-mapped memory areas etc.. 281deae26bfSKyle McMartin */ 282deae26bfSKyle McMartin 283deae26bfSKyle McMartin #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) 284deae26bfSKyle McMartin 2858b4ae334SJames Bottomley #define pte_none(x) (pte_val(x) == 0) 286deae26bfSKyle McMartin #define pte_present(x) (pte_val(x) & _PAGE_PRESENT) 28738860b2cSJohn David Anglin #define pte_user(x) (pte_val(x) & _PAGE_USER) 28801ab6057SJohn David Anglin #define pte_clear(mm, addr, xp) set_pte_at(mm, addr, xp, __pte(0)) 289deae26bfSKyle McMartin 290deae26bfSKyle McMartin #define pmd_flag(x) (pmd_val(x) & PxD_FLAG_MASK) 291deae26bfSKyle McMartin #define pmd_address(x) ((unsigned long)(pmd_val(x) &~ PxD_FLAG_MASK) << PxD_VALUE_SHIFT) 292d96885e2SMike Rapoport #define pud_flag(x) (pud_val(x) & PxD_FLAG_MASK) 293d96885e2SMike Rapoport #define pud_address(x) ((unsigned long)(pud_val(x) &~ PxD_FLAG_MASK) << PxD_VALUE_SHIFT) 294deae26bfSKyle McMartin #define pgd_flag(x) (pgd_val(x) & PxD_FLAG_MASK) 295deae26bfSKyle McMartin #define pgd_address(x) ((unsigned long)(pgd_val(x) &~ PxD_FLAG_MASK) << PxD_VALUE_SHIFT) 296deae26bfSKyle McMartin 297deae26bfSKyle McMartin #define pmd_none(x) (!pmd_val(x)) 298deae26bfSKyle McMartin #define pmd_bad(x) (!(pmd_flag(x) & PxD_FLAG_VALID)) 299deae26bfSKyle McMartin #define pmd_present(x) (pmd_flag(x) & PxD_FLAG_PRESENT) 300deae26bfSKyle McMartin static inline void pmd_clear(pmd_t *pmd) { 301d96885e2SMike Rapoport set_pmd(pmd, __pmd(0)); 302deae26bfSKyle McMartin } 303deae26bfSKyle McMartin 304deae26bfSKyle McMartin 305deae26bfSKyle McMartin 306f24ffde4SKirill A. Shutemov #if CONFIG_PGTABLE_LEVELS == 3 3079cf6fa24SAneesh Kumar K.V #define pud_pgtable(pud) ((pmd_t *) __va(pud_address(pud))) 3089cf6fa24SAneesh Kumar K.V #define pud_page(pud) virt_to_page((void *)pud_pgtable(pud)) 309deae26bfSKyle McMartin 310deae26bfSKyle McMartin /* For 64 bit we have three level tables */ 311deae26bfSKyle McMartin 312d96885e2SMike Rapoport #define pud_none(x) (!pud_val(x)) 313d96885e2SMike Rapoport #define pud_bad(x) (!(pud_flag(x) & PxD_FLAG_VALID)) 314d96885e2SMike Rapoport #define pud_present(x) (pud_flag(x) & PxD_FLAG_PRESENT) 315d96885e2SMike Rapoport static inline void pud_clear(pud_t *pud) { 316d96885e2SMike Rapoport set_pud(pud, __pud(0)); 317deae26bfSKyle McMartin } 318deae26bfSKyle McMartin #endif 319deae26bfSKyle McMartin 320deae26bfSKyle McMartin /* 321deae26bfSKyle McMartin * The following only work if pte_present() is true. 322deae26bfSKyle McMartin * Undefined behaviour if not.. 323deae26bfSKyle McMartin */ 324deae26bfSKyle McMartin static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY; } 325deae26bfSKyle McMartin static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; } 326deae26bfSKyle McMartin static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_WRITE; } 327df24e178SHelge Deller static inline int pte_special(pte_t pte) { return pte_val(pte) & _PAGE_SPECIAL; } 328deae26bfSKyle McMartin 329deae26bfSKyle McMartin static inline pte_t pte_mkclean(pte_t pte) { pte_val(pte) &= ~_PAGE_DIRTY; return pte; } 330deae26bfSKyle McMartin static inline pte_t pte_mkold(pte_t pte) { pte_val(pte) &= ~_PAGE_ACCESSED; return pte; } 331deae26bfSKyle McMartin static inline pte_t pte_wrprotect(pte_t pte) { pte_val(pte) &= ~_PAGE_WRITE; return pte; } 332deae26bfSKyle McMartin static inline pte_t pte_mkdirty(pte_t pte) { pte_val(pte) |= _PAGE_DIRTY; return pte; } 333deae26bfSKyle McMartin static inline pte_t pte_mkyoung(pte_t pte) { pte_val(pte) |= _PAGE_ACCESSED; return pte; } 334deae26bfSKyle McMartin static inline pte_t pte_mkwrite(pte_t pte) { pte_val(pte) |= _PAGE_WRITE; return pte; } 335df24e178SHelge Deller static inline pte_t pte_mkspecial(pte_t pte) { pte_val(pte) |= _PAGE_SPECIAL; return pte; } 336deae26bfSKyle McMartin 337deae26bfSKyle McMartin /* 3381f25ad26SHelge Deller * Huge pte definitions. 3391f25ad26SHelge Deller */ 3401f25ad26SHelge Deller #ifdef CONFIG_HUGETLB_PAGE 3411f25ad26SHelge Deller #define pte_huge(pte) (pte_val(pte) & _PAGE_HUGE) 34278c0cbffSHelge Deller #define pte_mkhuge(pte) (__pte(pte_val(pte) | \ 34378c0cbffSHelge Deller (parisc_requires_coherency() ? 0 : _PAGE_HUGE))) 3441f25ad26SHelge Deller #else 3451f25ad26SHelge Deller #define pte_huge(pte) (0) 3461f25ad26SHelge Deller #define pte_mkhuge(pte) (pte) 3471f25ad26SHelge Deller #endif 3481f25ad26SHelge Deller 3491f25ad26SHelge Deller 3501f25ad26SHelge Deller /* 351deae26bfSKyle McMartin * Conversion functions: convert a page and protection to a page entry, 352deae26bfSKyle McMartin * and a page entry and page directory to the page they refer to. 353deae26bfSKyle McMartin */ 354deae26bfSKyle McMartin #define __mk_pte(addr,pgprot) \ 355deae26bfSKyle McMartin ({ \ 356deae26bfSKyle McMartin pte_t __pte; \ 357deae26bfSKyle McMartin \ 358deae26bfSKyle McMartin pte_val(__pte) = ((((addr)>>PAGE_SHIFT)<<PFN_PTE_SHIFT) + pgprot_val(pgprot)); \ 359deae26bfSKyle McMartin \ 360deae26bfSKyle McMartin __pte; \ 361deae26bfSKyle McMartin }) 362deae26bfSKyle McMartin 363deae26bfSKyle McMartin #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) 364deae26bfSKyle McMartin 365deae26bfSKyle McMartin static inline pte_t pfn_pte(unsigned long pfn, pgprot_t pgprot) 366deae26bfSKyle McMartin { 367deae26bfSKyle McMartin pte_t pte; 368deae26bfSKyle McMartin pte_val(pte) = (pfn << PFN_PTE_SHIFT) | pgprot_val(pgprot); 369deae26bfSKyle McMartin return pte; 370deae26bfSKyle McMartin } 371deae26bfSKyle McMartin 372deae26bfSKyle McMartin static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) 373deae26bfSKyle McMartin { pte_val(pte) = (pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot); return pte; } 374deae26bfSKyle McMartin 375deae26bfSKyle McMartin /* Permanent address of a page. On parisc we don't have highmem. */ 376deae26bfSKyle McMartin 377deae26bfSKyle McMartin #define pte_pfn(x) (pte_val(x) >> PFN_PTE_SHIFT) 378deae26bfSKyle McMartin 379deae26bfSKyle McMartin #define pte_page(pte) (pfn_to_page(pte_pfn(pte))) 380deae26bfSKyle McMartin 381974b9b2cSMike Rapoport static inline unsigned long pmd_page_vaddr(pmd_t pmd) 382974b9b2cSMike Rapoport { 383974b9b2cSMike Rapoport return ((unsigned long) __va(pmd_address(pmd))); 384974b9b2cSMike Rapoport } 385deae26bfSKyle McMartin 3867106c51eSMike Rapoport #define pmd_pfn(pmd) (pmd_address(pmd) >> PAGE_SHIFT) 387deae26bfSKyle McMartin #define __pmd_page(pmd) ((unsigned long) __va(pmd_address(pmd))) 388deae26bfSKyle McMartin #define pmd_page(pmd) virt_to_page((void *)__pmd_page(pmd)) 389deae26bfSKyle McMartin 390deae26bfSKyle McMartin /* Find an entry in the second-level page table.. */ 391deae26bfSKyle McMartin 392deae26bfSKyle McMartin extern void paging_init (void); 393deae26bfSKyle McMartin 394deae26bfSKyle McMartin /* Used for deferring calls to flush_dcache_page() */ 395deae26bfSKyle McMartin 396deae26bfSKyle McMartin #define PG_dcache_dirty PG_arch_1 397deae26bfSKyle McMartin 39838860b2cSJohn David Anglin #define update_mmu_cache(vms,addr,ptep) __update_cache(*ptep) 399deae26bfSKyle McMartin 400*6d239fc7SDavid Hildenbrand /* 401*6d239fc7SDavid Hildenbrand * Encode/decode swap entries and swap PTEs. Swap PTEs are all PTEs that 402*6d239fc7SDavid Hildenbrand * are !pte_none() && !pte_present(). 403*6d239fc7SDavid Hildenbrand * 404*6d239fc7SDavid Hildenbrand * Format of swap PTEs (32bit): 405*6d239fc7SDavid Hildenbrand * 406*6d239fc7SDavid Hildenbrand * 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3 407*6d239fc7SDavid Hildenbrand * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 408*6d239fc7SDavid Hildenbrand * <---------------- offset -----------------> P E <ofs> < type -> 409*6d239fc7SDavid Hildenbrand * 410*6d239fc7SDavid Hildenbrand * E is the exclusive marker that is not stored in swap entries. 411*6d239fc7SDavid Hildenbrand * _PAGE_PRESENT (P) must be 0. 412*6d239fc7SDavid Hildenbrand * 413*6d239fc7SDavid Hildenbrand * For the 64bit version, the offset is extended by 32bit. 414*6d239fc7SDavid Hildenbrand */ 415deae26bfSKyle McMartin #define __swp_type(x) ((x).val & 0x1f) 416deae26bfSKyle McMartin #define __swp_offset(x) ( (((x).val >> 6) & 0x7) | \ 417deae26bfSKyle McMartin (((x).val >> 8) & ~0x7) ) 418*6d239fc7SDavid Hildenbrand #define __swp_entry(type, offset) ((swp_entry_t) { \ 419*6d239fc7SDavid Hildenbrand ((type) & 0x1f) | \ 420deae26bfSKyle McMartin ((offset & 0x7) << 6) | \ 421deae26bfSKyle McMartin ((offset & ~0x7) << 8) }) 422deae26bfSKyle McMartin #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) 423deae26bfSKyle McMartin #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) 424deae26bfSKyle McMartin 425*6d239fc7SDavid Hildenbrand #define __HAVE_ARCH_PTE_SWP_EXCLUSIVE 426*6d239fc7SDavid Hildenbrand static inline int pte_swp_exclusive(pte_t pte) 427*6d239fc7SDavid Hildenbrand { 428*6d239fc7SDavid Hildenbrand return pte_val(pte) & _PAGE_SWP_EXCLUSIVE; 429*6d239fc7SDavid Hildenbrand } 430*6d239fc7SDavid Hildenbrand 431*6d239fc7SDavid Hildenbrand static inline pte_t pte_swp_mkexclusive(pte_t pte) 432*6d239fc7SDavid Hildenbrand { 433*6d239fc7SDavid Hildenbrand pte_val(pte) |= _PAGE_SWP_EXCLUSIVE; 434*6d239fc7SDavid Hildenbrand return pte; 435*6d239fc7SDavid Hildenbrand } 436*6d239fc7SDavid Hildenbrand 437*6d239fc7SDavid Hildenbrand static inline pte_t pte_swp_clear_exclusive(pte_t pte) 438*6d239fc7SDavid Hildenbrand { 439*6d239fc7SDavid Hildenbrand pte_val(pte) &= ~_PAGE_SWP_EXCLUSIVE; 440*6d239fc7SDavid Hildenbrand return pte; 441*6d239fc7SDavid Hildenbrand } 442*6d239fc7SDavid Hildenbrand 443deae26bfSKyle McMartin static inline int ptep_test_and_clear_young(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep) 444deae26bfSKyle McMartin { 445bda079d3SJohn David Anglin pte_t pte; 446bda079d3SJohn David Anglin 447deae26bfSKyle McMartin if (!pte_young(*ptep)) 448deae26bfSKyle McMartin return 0; 449deae26bfSKyle McMartin 450bda079d3SJohn David Anglin pte = *ptep; 451bda079d3SJohn David Anglin if (!pte_young(pte)) { 452bda079d3SJohn David Anglin return 0; 453bda079d3SJohn David Anglin } 454b7795074SHelge Deller set_pte_at(vma->vm_mm, addr, ptep, pte_mkold(pte)); 455bda079d3SJohn David Anglin return 1; 456bda079d3SJohn David Anglin } 457deae26bfSKyle McMartin 458deae26bfSKyle McMartin struct mm_struct; 459deae26bfSKyle McMartin static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) 460deae26bfSKyle McMartin { 461deae26bfSKyle McMartin pte_t old_pte; 462deae26bfSKyle McMartin 4638b4ae334SJames Bottomley old_pte = *ptep; 464b7795074SHelge Deller set_pte_at(mm, addr, ptep, __pte(0)); 465deae26bfSKyle McMartin 466deae26bfSKyle McMartin return old_pte; 467deae26bfSKyle McMartin } 468deae26bfSKyle McMartin 469deae26bfSKyle McMartin static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep) 470deae26bfSKyle McMartin { 471b7795074SHelge Deller set_pte_at(mm, addr, ptep, pte_wrprotect(*ptep)); 472deae26bfSKyle McMartin } 473deae26bfSKyle McMartin 474deae26bfSKyle McMartin #define pte_same(A,B) (pte_val(A) == pte_val(B)) 475deae26bfSKyle McMartin 476c9c2877dSHelge Deller struct seq_file; 477c9c2877dSHelge Deller extern void arch_report_meminfo(struct seq_file *m); 478c9c2877dSHelge Deller 479deae26bfSKyle McMartin #endif /* !__ASSEMBLY__ */ 480deae26bfSKyle McMartin 481deae26bfSKyle McMartin 482deae26bfSKyle McMartin /* TLB page size encoding - see table 3-1 in parisc20.pdf */ 483deae26bfSKyle McMartin #define _PAGE_SIZE_ENCODING_4K 0 484deae26bfSKyle McMartin #define _PAGE_SIZE_ENCODING_16K 1 485deae26bfSKyle McMartin #define _PAGE_SIZE_ENCODING_64K 2 486deae26bfSKyle McMartin #define _PAGE_SIZE_ENCODING_256K 3 487deae26bfSKyle McMartin #define _PAGE_SIZE_ENCODING_1M 4 488deae26bfSKyle McMartin #define _PAGE_SIZE_ENCODING_4M 5 489deae26bfSKyle McMartin #define _PAGE_SIZE_ENCODING_16M 6 490deae26bfSKyle McMartin #define _PAGE_SIZE_ENCODING_64M 7 491deae26bfSKyle McMartin 492deae26bfSKyle McMartin #if defined(CONFIG_PARISC_PAGE_SIZE_4KB) 493deae26bfSKyle McMartin # define _PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_4K 494deae26bfSKyle McMartin #elif defined(CONFIG_PARISC_PAGE_SIZE_16KB) 495deae26bfSKyle McMartin # define _PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_16K 496deae26bfSKyle McMartin #elif defined(CONFIG_PARISC_PAGE_SIZE_64KB) 497deae26bfSKyle McMartin # define _PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_64K 498deae26bfSKyle McMartin #endif 499deae26bfSKyle McMartin 500deae26bfSKyle McMartin 501deae26bfSKyle McMartin #define pgprot_noncached(prot) __pgprot(pgprot_val(prot) | _PAGE_NO_CACHE) 502deae26bfSKyle McMartin 503deae26bfSKyle McMartin /* We provide our own get_unmapped_area to provide cache coherency */ 504deae26bfSKyle McMartin 505deae26bfSKyle McMartin #define HAVE_ARCH_UNMAPPED_AREA 5069dabf60dSHelge Deller #define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN 507deae26bfSKyle McMartin 508deae26bfSKyle McMartin #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG 509deae26bfSKyle McMartin #define __HAVE_ARCH_PTEP_GET_AND_CLEAR 510deae26bfSKyle McMartin #define __HAVE_ARCH_PTEP_SET_WRPROTECT 511deae26bfSKyle McMartin #define __HAVE_ARCH_PTE_SAME 512deae26bfSKyle McMartin 513deae26bfSKyle McMartin #endif /* _PARISC_PGTABLE_H */ 514