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738 lines
18 KiB
738 lines
18 KiB
/* |
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* This file is subject to the terms and conditions of the GNU General Public |
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* License. See the file "COPYING" in the main directory of this archive |
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* for more details. |
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* |
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* Copyright (C) 2003 Ralf Baechle |
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*/ |
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#ifndef _ASM_PGTABLE_H |
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#define _ASM_PGTABLE_H |
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|
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#include <linux/mm_types.h> |
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#include <linux/mmzone.h> |
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#ifdef CONFIG_32BIT |
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#include <asm/pgtable-32.h> |
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#endif |
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#ifdef CONFIG_64BIT |
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#include <asm/pgtable-64.h> |
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#endif |
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|
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#include <asm/cmpxchg.h> |
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#include <asm/io.h> |
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#include <asm/pgtable-bits.h> |
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#include <asm/cpu-features.h> |
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|
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struct mm_struct; |
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struct vm_area_struct; |
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|
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#define PAGE_SHARED vm_get_page_prot(VM_READ|VM_WRITE|VM_SHARED) |
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|
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#define PAGE_KERNEL __pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE | \ |
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_PAGE_GLOBAL | _page_cachable_default) |
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#define PAGE_KERNEL_NC __pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE | \ |
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_PAGE_GLOBAL | _CACHE_CACHABLE_NONCOHERENT) |
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#define PAGE_KERNEL_UNCACHED __pgprot(_PAGE_PRESENT | __READABLE | \ |
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__WRITEABLE | _PAGE_GLOBAL | _CACHE_UNCACHED) |
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|
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/* |
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* If _PAGE_NO_EXEC is not defined, we can't do page protection for |
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* execute, and consider it to be the same as read. Also, write |
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* permissions imply read permissions. This is the closest we can get |
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* by reasonable means.. |
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*/ |
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|
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/* |
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* Dummy values to fill the table in mmap.c |
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* The real values will be generated at runtime |
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*/ |
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#define __P000 __pgprot(0) |
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#define __P001 __pgprot(0) |
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#define __P010 __pgprot(0) |
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#define __P011 __pgprot(0) |
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#define __P100 __pgprot(0) |
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#define __P101 __pgprot(0) |
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#define __P110 __pgprot(0) |
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#define __P111 __pgprot(0) |
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|
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#define __S000 __pgprot(0) |
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#define __S001 __pgprot(0) |
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#define __S010 __pgprot(0) |
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#define __S011 __pgprot(0) |
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#define __S100 __pgprot(0) |
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#define __S101 __pgprot(0) |
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#define __S110 __pgprot(0) |
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#define __S111 __pgprot(0) |
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|
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extern unsigned long _page_cachable_default; |
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extern void __update_cache(unsigned long address, pte_t pte); |
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|
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/* |
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* ZERO_PAGE is a global shared page that is always zero; used |
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* for zero-mapped memory areas etc.. |
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*/ |
|
|
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extern unsigned long empty_zero_page; |
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extern unsigned long zero_page_mask; |
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|
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#define ZERO_PAGE(vaddr) \ |
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(virt_to_page((void *)(empty_zero_page + (((unsigned long)(vaddr)) & zero_page_mask)))) |
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#define __HAVE_COLOR_ZERO_PAGE |
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|
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extern void paging_init(void); |
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|
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/* |
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* Conversion functions: convert a page and protection to a page entry, |
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* and a page entry and page directory to the page they refer to. |
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*/ |
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#define pmd_phys(pmd) virt_to_phys((void *)pmd_val(pmd)) |
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|
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#define __pmd_page(pmd) (pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT)) |
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#ifndef CONFIG_TRANSPARENT_HUGEPAGE |
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#define pmd_page(pmd) __pmd_page(pmd) |
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#endif /* CONFIG_TRANSPARENT_HUGEPAGE */ |
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|
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#define pmd_page_vaddr(pmd) pmd_val(pmd) |
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|
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#define htw_stop() \ |
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do { \ |
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unsigned long __flags; \ |
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\ |
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if (cpu_has_htw) { \ |
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local_irq_save(__flags); \ |
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if(!raw_current_cpu_data.htw_seq++) { \ |
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write_c0_pwctl(read_c0_pwctl() & \ |
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~(1 << MIPS_PWCTL_PWEN_SHIFT)); \ |
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back_to_back_c0_hazard(); \ |
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} \ |
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local_irq_restore(__flags); \ |
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} \ |
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} while(0) |
|
|
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#define htw_start() \ |
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do { \ |
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unsigned long __flags; \ |
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\ |
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if (cpu_has_htw) { \ |
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local_irq_save(__flags); \ |
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if (!--raw_current_cpu_data.htw_seq) { \ |
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write_c0_pwctl(read_c0_pwctl() | \ |
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(1 << MIPS_PWCTL_PWEN_SHIFT)); \ |
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back_to_back_c0_hazard(); \ |
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} \ |
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local_irq_restore(__flags); \ |
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} \ |
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} while(0) |
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|
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static inline void set_pte_at(struct mm_struct *mm, unsigned long addr, |
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pte_t *ptep, pte_t pteval); |
|
|
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#if defined(CONFIG_PHYS_ADDR_T_64BIT) && defined(CONFIG_CPU_MIPS32) |
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|
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#ifdef CONFIG_XPA |
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# define pte_none(pte) (!(((pte).pte_high) & ~_PAGE_GLOBAL)) |
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#else |
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# define pte_none(pte) (!(((pte).pte_low | (pte).pte_high) & ~_PAGE_GLOBAL)) |
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#endif |
|
|
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#define pte_present(pte) ((pte).pte_low & _PAGE_PRESENT) |
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#define pte_no_exec(pte) ((pte).pte_low & _PAGE_NO_EXEC) |
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|
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static inline void set_pte(pte_t *ptep, pte_t pte) |
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{ |
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ptep->pte_high = pte.pte_high; |
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smp_wmb(); |
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ptep->pte_low = pte.pte_low; |
|
|
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#ifdef CONFIG_XPA |
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if (pte.pte_high & _PAGE_GLOBAL) { |
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#else |
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if (pte.pte_low & _PAGE_GLOBAL) { |
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#endif |
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pte_t *buddy = ptep_buddy(ptep); |
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/* |
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* Make sure the buddy is global too (if it's !none, |
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* it better already be global) |
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*/ |
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if (pte_none(*buddy)) { |
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if (!IS_ENABLED(CONFIG_XPA)) |
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buddy->pte_low |= _PAGE_GLOBAL; |
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buddy->pte_high |= _PAGE_GLOBAL; |
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} |
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} |
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} |
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|
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static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) |
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{ |
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pte_t null = __pte(0); |
|
|
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htw_stop(); |
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/* Preserve global status for the pair */ |
|
if (IS_ENABLED(CONFIG_XPA)) { |
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if (ptep_buddy(ptep)->pte_high & _PAGE_GLOBAL) |
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null.pte_high = _PAGE_GLOBAL; |
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} else { |
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if (ptep_buddy(ptep)->pte_low & _PAGE_GLOBAL) |
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null.pte_low = null.pte_high = _PAGE_GLOBAL; |
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} |
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|
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set_pte_at(mm, addr, ptep, null); |
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htw_start(); |
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} |
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#else |
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|
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#define pte_none(pte) (!(pte_val(pte) & ~_PAGE_GLOBAL)) |
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#define pte_present(pte) (pte_val(pte) & _PAGE_PRESENT) |
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#define pte_no_exec(pte) (pte_val(pte) & _PAGE_NO_EXEC) |
|
|
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/* |
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* Certain architectures need to do special things when pte's |
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* within a page table are directly modified. Thus, the following |
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* hook is made available. |
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*/ |
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static inline void set_pte(pte_t *ptep, pte_t pteval) |
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{ |
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*ptep = pteval; |
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#if !defined(CONFIG_CPU_R3K_TLB) |
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if (pte_val(pteval) & _PAGE_GLOBAL) { |
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pte_t *buddy = ptep_buddy(ptep); |
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/* |
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* Make sure the buddy is global too (if it's !none, |
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* it better already be global) |
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*/ |
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# if defined(CONFIG_PHYS_ADDR_T_64BIT) && !defined(CONFIG_CPU_MIPS32) |
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cmpxchg64(&buddy->pte, 0, _PAGE_GLOBAL); |
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# else |
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cmpxchg(&buddy->pte, 0, _PAGE_GLOBAL); |
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# endif |
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} |
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#endif |
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} |
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|
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static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) |
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{ |
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htw_stop(); |
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#if !defined(CONFIG_CPU_R3K_TLB) |
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/* Preserve global status for the pair */ |
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if (pte_val(*ptep_buddy(ptep)) & _PAGE_GLOBAL) |
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set_pte_at(mm, addr, ptep, __pte(_PAGE_GLOBAL)); |
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else |
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#endif |
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set_pte_at(mm, addr, ptep, __pte(0)); |
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htw_start(); |
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} |
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#endif |
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|
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static inline void set_pte_at(struct mm_struct *mm, unsigned long addr, |
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pte_t *ptep, pte_t pteval) |
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{ |
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|
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if (!pte_present(pteval)) |
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goto cache_sync_done; |
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|
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if (pte_present(*ptep) && (pte_pfn(*ptep) == pte_pfn(pteval))) |
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goto cache_sync_done; |
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|
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__update_cache(addr, pteval); |
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cache_sync_done: |
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set_pte(ptep, pteval); |
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} |
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|
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/* |
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* (pmds are folded into puds so this doesn't get actually called, |
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* but the define is needed for a generic inline function.) |
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*/ |
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#define set_pmd(pmdptr, pmdval) do { *(pmdptr) = (pmdval); } while(0) |
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|
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#ifndef __PAGETABLE_PMD_FOLDED |
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/* |
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* (puds are folded into pgds so this doesn't get actually called, |
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* but the define is needed for a generic inline function.) |
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*/ |
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#define set_pud(pudptr, pudval) do { *(pudptr) = (pudval); } while(0) |
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#endif |
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#define PGD_T_LOG2 (__builtin_ffs(sizeof(pgd_t)) - 1) |
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#define PMD_T_LOG2 (__builtin_ffs(sizeof(pmd_t)) - 1) |
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#define PTE_T_LOG2 (__builtin_ffs(sizeof(pte_t)) - 1) |
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|
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/* |
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* We used to declare this array with size but gcc 3.3 and older are not able |
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* to find that this expression is a constant, so the size is dropped. |
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*/ |
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extern pgd_t swapper_pg_dir[]; |
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|
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/* |
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* Platform specific pte_special() and pte_mkspecial() definitions |
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* are required only when ARCH_HAS_PTE_SPECIAL is enabled. |
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*/ |
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#if defined(CONFIG_ARCH_HAS_PTE_SPECIAL) |
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#if defined(CONFIG_PHYS_ADDR_T_64BIT) && defined(CONFIG_CPU_MIPS32) |
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static inline int pte_special(pte_t pte) |
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{ |
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return pte.pte_low & _PAGE_SPECIAL; |
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} |
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static inline pte_t pte_mkspecial(pte_t pte) |
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{ |
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pte.pte_low |= _PAGE_SPECIAL; |
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return pte; |
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} |
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#else |
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static inline int pte_special(pte_t pte) |
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{ |
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return pte_val(pte) & _PAGE_SPECIAL; |
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} |
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|
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static inline pte_t pte_mkspecial(pte_t pte) |
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{ |
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pte_val(pte) |= _PAGE_SPECIAL; |
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return pte; |
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} |
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#endif |
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#endif /* CONFIG_ARCH_HAS_PTE_SPECIAL */ |
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|
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/* |
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* The following only work if pte_present() is true. |
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* Undefined behaviour if not.. |
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*/ |
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#if defined(CONFIG_PHYS_ADDR_T_64BIT) && defined(CONFIG_CPU_MIPS32) |
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static inline int pte_write(pte_t pte) { return pte.pte_low & _PAGE_WRITE; } |
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static inline int pte_dirty(pte_t pte) { return pte.pte_low & _PAGE_MODIFIED; } |
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static inline int pte_young(pte_t pte) { return pte.pte_low & _PAGE_ACCESSED; } |
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|
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static inline pte_t pte_wrprotect(pte_t pte) |
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{ |
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pte.pte_low &= ~_PAGE_WRITE; |
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if (!IS_ENABLED(CONFIG_XPA)) |
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pte.pte_low &= ~_PAGE_SILENT_WRITE; |
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pte.pte_high &= ~_PAGE_SILENT_WRITE; |
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return pte; |
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} |
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|
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static inline pte_t pte_mkclean(pte_t pte) |
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{ |
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pte.pte_low &= ~_PAGE_MODIFIED; |
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if (!IS_ENABLED(CONFIG_XPA)) |
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pte.pte_low &= ~_PAGE_SILENT_WRITE; |
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pte.pte_high &= ~_PAGE_SILENT_WRITE; |
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return pte; |
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} |
|
|
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static inline pte_t pte_mkold(pte_t pte) |
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{ |
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pte.pte_low &= ~_PAGE_ACCESSED; |
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if (!IS_ENABLED(CONFIG_XPA)) |
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pte.pte_low &= ~_PAGE_SILENT_READ; |
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pte.pte_high &= ~_PAGE_SILENT_READ; |
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return pte; |
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} |
|
|
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static inline pte_t pte_mkwrite(pte_t pte) |
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{ |
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pte.pte_low |= _PAGE_WRITE; |
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if (pte.pte_low & _PAGE_MODIFIED) { |
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if (!IS_ENABLED(CONFIG_XPA)) |
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pte.pte_low |= _PAGE_SILENT_WRITE; |
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pte.pte_high |= _PAGE_SILENT_WRITE; |
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} |
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return pte; |
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} |
|
|
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static inline pte_t pte_mkdirty(pte_t pte) |
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{ |
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pte.pte_low |= _PAGE_MODIFIED; |
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if (pte.pte_low & _PAGE_WRITE) { |
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if (!IS_ENABLED(CONFIG_XPA)) |
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pte.pte_low |= _PAGE_SILENT_WRITE; |
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pte.pte_high |= _PAGE_SILENT_WRITE; |
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} |
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return pte; |
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} |
|
|
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static inline pte_t pte_mkyoung(pte_t pte) |
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{ |
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pte.pte_low |= _PAGE_ACCESSED; |
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if (!(pte.pte_low & _PAGE_NO_READ)) { |
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if (!IS_ENABLED(CONFIG_XPA)) |
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pte.pte_low |= _PAGE_SILENT_READ; |
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pte.pte_high |= _PAGE_SILENT_READ; |
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} |
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return pte; |
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} |
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#else |
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static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_WRITE; } |
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static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_MODIFIED; } |
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static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; } |
|
|
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static inline pte_t pte_wrprotect(pte_t pte) |
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{ |
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pte_val(pte) &= ~(_PAGE_WRITE | _PAGE_SILENT_WRITE); |
|
return pte; |
|
} |
|
|
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static inline pte_t pte_mkclean(pte_t pte) |
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{ |
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pte_val(pte) &= ~(_PAGE_MODIFIED | _PAGE_SILENT_WRITE); |
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return pte; |
|
} |
|
|
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static inline pte_t pte_mkold(pte_t pte) |
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{ |
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pte_val(pte) &= ~(_PAGE_ACCESSED | _PAGE_SILENT_READ); |
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return pte; |
|
} |
|
|
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static inline pte_t pte_mkwrite(pte_t pte) |
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{ |
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pte_val(pte) |= _PAGE_WRITE; |
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if (pte_val(pte) & _PAGE_MODIFIED) |
|
pte_val(pte) |= _PAGE_SILENT_WRITE; |
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return pte; |
|
} |
|
|
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static inline pte_t pte_mkdirty(pte_t pte) |
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{ |
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pte_val(pte) |= _PAGE_MODIFIED | _PAGE_SOFT_DIRTY; |
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if (pte_val(pte) & _PAGE_WRITE) |
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pte_val(pte) |= _PAGE_SILENT_WRITE; |
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return pte; |
|
} |
|
|
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static inline pte_t pte_mkyoung(pte_t pte) |
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{ |
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pte_val(pte) |= _PAGE_ACCESSED; |
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if (!(pte_val(pte) & _PAGE_NO_READ)) |
|
pte_val(pte) |= _PAGE_SILENT_READ; |
|
return pte; |
|
} |
|
|
|
#define pte_sw_mkyoung pte_mkyoung |
|
|
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#ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT |
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static inline int pte_huge(pte_t pte) { return pte_val(pte) & _PAGE_HUGE; } |
|
|
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static inline pte_t pte_mkhuge(pte_t pte) |
|
{ |
|
pte_val(pte) |= _PAGE_HUGE; |
|
return pte; |
|
} |
|
#endif /* CONFIG_MIPS_HUGE_TLB_SUPPORT */ |
|
|
|
#ifdef CONFIG_HAVE_ARCH_SOFT_DIRTY |
|
static inline bool pte_soft_dirty(pte_t pte) |
|
{ |
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return pte_val(pte) & _PAGE_SOFT_DIRTY; |
|
} |
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#define pte_swp_soft_dirty pte_soft_dirty |
|
|
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static inline pte_t pte_mksoft_dirty(pte_t pte) |
|
{ |
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pte_val(pte) |= _PAGE_SOFT_DIRTY; |
|
return pte; |
|
} |
|
#define pte_swp_mksoft_dirty pte_mksoft_dirty |
|
|
|
static inline pte_t pte_clear_soft_dirty(pte_t pte) |
|
{ |
|
pte_val(pte) &= ~(_PAGE_SOFT_DIRTY); |
|
return pte; |
|
} |
|
#define pte_swp_clear_soft_dirty pte_clear_soft_dirty |
|
|
|
#endif /* CONFIG_HAVE_ARCH_SOFT_DIRTY */ |
|
|
|
#endif |
|
|
|
/* |
|
* Macro to make mark a page protection value as "uncacheable". Note |
|
* that "protection" is really a misnomer here as the protection value |
|
* contains the memory attribute bits, dirty bits, and various other |
|
* bits as well. |
|
*/ |
|
#define pgprot_noncached pgprot_noncached |
|
|
|
static inline pgprot_t pgprot_noncached(pgprot_t _prot) |
|
{ |
|
unsigned long prot = pgprot_val(_prot); |
|
|
|
prot = (prot & ~_CACHE_MASK) | _CACHE_UNCACHED; |
|
|
|
return __pgprot(prot); |
|
} |
|
|
|
#define pgprot_writecombine pgprot_writecombine |
|
|
|
static inline pgprot_t pgprot_writecombine(pgprot_t _prot) |
|
{ |
|
unsigned long prot = pgprot_val(_prot); |
|
|
|
/* cpu_data[0].writecombine is already shifted by _CACHE_SHIFT */ |
|
prot = (prot & ~_CACHE_MASK) | cpu_data[0].writecombine; |
|
|
|
return __pgprot(prot); |
|
} |
|
|
|
static inline void flush_tlb_fix_spurious_fault(struct vm_area_struct *vma, |
|
unsigned long address) |
|
{ |
|
} |
|
|
|
#define __HAVE_ARCH_PTE_SAME |
|
static inline int pte_same(pte_t pte_a, pte_t pte_b) |
|
{ |
|
return pte_val(pte_a) == pte_val(pte_b); |
|
} |
|
|
|
#define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS |
|
static inline int ptep_set_access_flags(struct vm_area_struct *vma, |
|
unsigned long address, pte_t *ptep, |
|
pte_t entry, int dirty) |
|
{ |
|
if (!pte_same(*ptep, entry)) |
|
set_pte_at(vma->vm_mm, address, ptep, entry); |
|
/* |
|
* update_mmu_cache will unconditionally execute, handling both |
|
* the case that the PTE changed and the spurious fault case. |
|
*/ |
|
return true; |
|
} |
|
|
|
/* |
|
* Conversion functions: convert a page and protection to a page entry, |
|
* and a page entry and page directory to the page they refer to. |
|
*/ |
|
#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) |
|
|
|
#if defined(CONFIG_XPA) |
|
static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
|
{ |
|
pte.pte_low &= (_PAGE_MODIFIED | _PAGE_ACCESSED | _PFNX_MASK); |
|
pte.pte_high &= (_PFN_MASK | _CACHE_MASK); |
|
pte.pte_low |= pgprot_val(newprot) & ~_PFNX_MASK; |
|
pte.pte_high |= pgprot_val(newprot) & ~(_PFN_MASK | _CACHE_MASK); |
|
return pte; |
|
} |
|
#elif defined(CONFIG_PHYS_ADDR_T_64BIT) && defined(CONFIG_CPU_MIPS32) |
|
static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
|
{ |
|
pte.pte_low &= _PAGE_CHG_MASK; |
|
pte.pte_high &= (_PFN_MASK | _CACHE_MASK); |
|
pte.pte_low |= pgprot_val(newprot); |
|
pte.pte_high |= pgprot_val(newprot) & ~(_PFN_MASK | _CACHE_MASK); |
|
return pte; |
|
} |
|
#else |
|
static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
|
{ |
|
pte_val(pte) &= _PAGE_CHG_MASK; |
|
pte_val(pte) |= pgprot_val(newprot) & ~_PAGE_CHG_MASK; |
|
if ((pte_val(pte) & _PAGE_ACCESSED) && !(pte_val(pte) & _PAGE_NO_READ)) |
|
pte_val(pte) |= _PAGE_SILENT_READ; |
|
return pte; |
|
} |
|
#endif |
|
|
|
|
|
extern void __update_tlb(struct vm_area_struct *vma, unsigned long address, |
|
pte_t pte); |
|
|
|
static inline void update_mmu_cache(struct vm_area_struct *vma, |
|
unsigned long address, pte_t *ptep) |
|
{ |
|
pte_t pte = *ptep; |
|
__update_tlb(vma, address, pte); |
|
} |
|
|
|
#define __HAVE_ARCH_UPDATE_MMU_TLB |
|
#define update_mmu_tlb update_mmu_cache |
|
|
|
static inline void update_mmu_cache_pmd(struct vm_area_struct *vma, |
|
unsigned long address, pmd_t *pmdp) |
|
{ |
|
pte_t pte = *(pte_t *)pmdp; |
|
|
|
__update_tlb(vma, address, pte); |
|
} |
|
|
|
#define kern_addr_valid(addr) (1) |
|
|
|
/* |
|
* Allow physical addresses to be fixed up to help 36-bit peripherals. |
|
*/ |
|
#ifdef CONFIG_MIPS_FIXUP_BIGPHYS_ADDR |
|
phys_addr_t fixup_bigphys_addr(phys_addr_t addr, phys_addr_t size); |
|
int io_remap_pfn_range(struct vm_area_struct *vma, unsigned long vaddr, |
|
unsigned long pfn, unsigned long size, pgprot_t prot); |
|
#define io_remap_pfn_range io_remap_pfn_range |
|
#else |
|
#define fixup_bigphys_addr(addr, size) (addr) |
|
#endif /* CONFIG_MIPS_FIXUP_BIGPHYS_ADDR */ |
|
|
|
#ifdef CONFIG_TRANSPARENT_HUGEPAGE |
|
|
|
/* We don't have hardware dirty/accessed bits, generic_pmdp_establish is fine.*/ |
|
#define pmdp_establish generic_pmdp_establish |
|
|
|
#define has_transparent_hugepage has_transparent_hugepage |
|
extern int has_transparent_hugepage(void); |
|
|
|
static inline int pmd_trans_huge(pmd_t pmd) |
|
{ |
|
return !!(pmd_val(pmd) & _PAGE_HUGE); |
|
} |
|
|
|
static inline pmd_t pmd_mkhuge(pmd_t pmd) |
|
{ |
|
pmd_val(pmd) |= _PAGE_HUGE; |
|
|
|
return pmd; |
|
} |
|
|
|
extern void set_pmd_at(struct mm_struct *mm, unsigned long addr, |
|
pmd_t *pmdp, pmd_t pmd); |
|
|
|
#define pmd_write pmd_write |
|
static inline int pmd_write(pmd_t pmd) |
|
{ |
|
return !!(pmd_val(pmd) & _PAGE_WRITE); |
|
} |
|
|
|
static inline pmd_t pmd_wrprotect(pmd_t pmd) |
|
{ |
|
pmd_val(pmd) &= ~(_PAGE_WRITE | _PAGE_SILENT_WRITE); |
|
return pmd; |
|
} |
|
|
|
static inline pmd_t pmd_mkwrite(pmd_t pmd) |
|
{ |
|
pmd_val(pmd) |= _PAGE_WRITE; |
|
if (pmd_val(pmd) & _PAGE_MODIFIED) |
|
pmd_val(pmd) |= _PAGE_SILENT_WRITE; |
|
|
|
return pmd; |
|
} |
|
|
|
static inline int pmd_dirty(pmd_t pmd) |
|
{ |
|
return !!(pmd_val(pmd) & _PAGE_MODIFIED); |
|
} |
|
|
|
static inline pmd_t pmd_mkclean(pmd_t pmd) |
|
{ |
|
pmd_val(pmd) &= ~(_PAGE_MODIFIED | _PAGE_SILENT_WRITE); |
|
return pmd; |
|
} |
|
|
|
static inline pmd_t pmd_mkdirty(pmd_t pmd) |
|
{ |
|
pmd_val(pmd) |= _PAGE_MODIFIED | _PAGE_SOFT_DIRTY; |
|
if (pmd_val(pmd) & _PAGE_WRITE) |
|
pmd_val(pmd) |= _PAGE_SILENT_WRITE; |
|
|
|
return pmd; |
|
} |
|
|
|
static inline int pmd_young(pmd_t pmd) |
|
{ |
|
return !!(pmd_val(pmd) & _PAGE_ACCESSED); |
|
} |
|
|
|
static inline pmd_t pmd_mkold(pmd_t pmd) |
|
{ |
|
pmd_val(pmd) &= ~(_PAGE_ACCESSED|_PAGE_SILENT_READ); |
|
|
|
return pmd; |
|
} |
|
|
|
static inline pmd_t pmd_mkyoung(pmd_t pmd) |
|
{ |
|
pmd_val(pmd) |= _PAGE_ACCESSED; |
|
|
|
if (!(pmd_val(pmd) & _PAGE_NO_READ)) |
|
pmd_val(pmd) |= _PAGE_SILENT_READ; |
|
|
|
return pmd; |
|
} |
|
|
|
#ifdef CONFIG_HAVE_ARCH_SOFT_DIRTY |
|
static inline int pmd_soft_dirty(pmd_t pmd) |
|
{ |
|
return !!(pmd_val(pmd) & _PAGE_SOFT_DIRTY); |
|
} |
|
|
|
static inline pmd_t pmd_mksoft_dirty(pmd_t pmd) |
|
{ |
|
pmd_val(pmd) |= _PAGE_SOFT_DIRTY; |
|
return pmd; |
|
} |
|
|
|
static inline pmd_t pmd_clear_soft_dirty(pmd_t pmd) |
|
{ |
|
pmd_val(pmd) &= ~(_PAGE_SOFT_DIRTY); |
|
return pmd; |
|
} |
|
|
|
#endif /* CONFIG_HAVE_ARCH_SOFT_DIRTY */ |
|
|
|
/* Extern to avoid header file madness */ |
|
extern pmd_t mk_pmd(struct page *page, pgprot_t prot); |
|
|
|
static inline unsigned long pmd_pfn(pmd_t pmd) |
|
{ |
|
return pmd_val(pmd) >> _PFN_SHIFT; |
|
} |
|
|
|
static inline struct page *pmd_page(pmd_t pmd) |
|
{ |
|
if (pmd_trans_huge(pmd)) |
|
return pfn_to_page(pmd_pfn(pmd)); |
|
|
|
return pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT); |
|
} |
|
|
|
static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot) |
|
{ |
|
pmd_val(pmd) = (pmd_val(pmd) & (_PAGE_CHG_MASK | _PAGE_HUGE)) | |
|
(pgprot_val(newprot) & ~_PAGE_CHG_MASK); |
|
return pmd; |
|
} |
|
|
|
static inline pmd_t pmd_mkinvalid(pmd_t pmd) |
|
{ |
|
pmd_val(pmd) &= ~(_PAGE_PRESENT | _PAGE_VALID | _PAGE_DIRTY); |
|
|
|
return pmd; |
|
} |
|
|
|
/* |
|
* The generic version pmdp_huge_get_and_clear uses a version of pmd_clear() with a |
|
* different prototype. |
|
*/ |
|
#define __HAVE_ARCH_PMDP_HUGE_GET_AND_CLEAR |
|
static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm, |
|
unsigned long address, pmd_t *pmdp) |
|
{ |
|
pmd_t old = *pmdp; |
|
|
|
pmd_clear(pmdp); |
|
|
|
return old; |
|
} |
|
|
|
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */ |
|
|
|
#ifdef _PAGE_HUGE |
|
#define pmd_leaf(pmd) ((pmd_val(pmd) & _PAGE_HUGE) != 0) |
|
#define pud_leaf(pud) ((pud_val(pud) & _PAGE_HUGE) != 0) |
|
#endif |
|
|
|
#define gup_fast_permitted(start, end) (!cpu_has_dc_aliases) |
|
|
|
/* |
|
* We provide our own get_unmapped area to cope with the virtual aliasing |
|
* constraints placed on us by the cache architecture. |
|
*/ |
|
#define HAVE_ARCH_UNMAPPED_AREA |
|
#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN |
|
|
|
#endif /* _ASM_PGTABLE_H */
|
|
|