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148 lines
4.1 KiB
148 lines
4.1 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* Copyright (C) 2009 Chen Liqin <[email protected]> |
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* Copyright (C) 2012 Regents of the University of California |
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* Copyright (C) 2017 SiFive |
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* Copyright (C) 2017 XiaojingZhu <[email protected]> |
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*/ |
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#ifndef _ASM_RISCV_PAGE_H |
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#define _ASM_RISCV_PAGE_H |
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#include <linux/pfn.h> |
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#include <linux/const.h> |
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#define PAGE_SHIFT (12) |
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#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT) |
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#define PAGE_MASK (~(PAGE_SIZE - 1)) |
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#ifdef CONFIG_64BIT |
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#define HUGE_MAX_HSTATE 2 |
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#else |
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#define HUGE_MAX_HSTATE 1 |
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#endif |
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#define HPAGE_SHIFT PMD_SHIFT |
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#define HPAGE_SIZE (_AC(1, UL) << HPAGE_SHIFT) |
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#define HPAGE_MASK (~(HPAGE_SIZE - 1)) |
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#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) |
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/* |
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* PAGE_OFFSET -- the first address of the first page of memory. |
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* When not using MMU this corresponds to the first free page in |
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* physical memory (aligned on a page boundary). |
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*/ |
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#define PAGE_OFFSET _AC(CONFIG_PAGE_OFFSET, UL) |
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#define KERN_VIRT_SIZE (-PAGE_OFFSET) |
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#ifndef __ASSEMBLY__ |
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#define PAGE_UP(addr) (((addr)+((PAGE_SIZE)-1))&(~((PAGE_SIZE)-1))) |
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#define PAGE_DOWN(addr) ((addr)&(~((PAGE_SIZE)-1))) |
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/* align addr on a size boundary - adjust address up/down if needed */ |
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#define _ALIGN_UP(addr, size) (((addr)+((size)-1))&(~((size)-1))) |
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#define _ALIGN_DOWN(addr, size) ((addr)&(~((size)-1))) |
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/* align addr on a size boundary - adjust address up if needed */ |
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#define _ALIGN(addr, size) _ALIGN_UP(addr, size) |
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#define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE) |
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#define copy_page(to, from) memcpy((to), (from), PAGE_SIZE) |
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#define clear_user_page(pgaddr, vaddr, page) memset((pgaddr), 0, PAGE_SIZE) |
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#define copy_user_page(vto, vfrom, vaddr, topg) \ |
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memcpy((vto), (vfrom), PAGE_SIZE) |
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/* |
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* Use struct definitions to apply C type checking |
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*/ |
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/* Page Global Directory entry */ |
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typedef struct { |
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unsigned long pgd; |
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} pgd_t; |
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/* Page Table entry */ |
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typedef struct { |
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unsigned long pte; |
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} pte_t; |
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typedef struct { |
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unsigned long pgprot; |
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} pgprot_t; |
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typedef struct page *pgtable_t; |
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#define pte_val(x) ((x).pte) |
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#define pgd_val(x) ((x).pgd) |
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#define pgprot_val(x) ((x).pgprot) |
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#define __pte(x) ((pte_t) { (x) }) |
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#define __pgd(x) ((pgd_t) { (x) }) |
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#define __pgprot(x) ((pgprot_t) { (x) }) |
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#ifdef CONFIG_64BIT |
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#define PTE_FMT "%016lx" |
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#else |
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#define PTE_FMT "%08lx" |
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#endif |
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#ifdef CONFIG_MMU |
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extern unsigned long va_pa_offset; |
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extern unsigned long pfn_base; |
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#define ARCH_PFN_OFFSET (pfn_base) |
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#else |
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#define va_pa_offset 0 |
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#define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT) |
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#endif /* CONFIG_MMU */ |
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extern unsigned long max_low_pfn; |
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extern unsigned long min_low_pfn; |
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#define __pa_to_va_nodebug(x) ((void *)((unsigned long) (x) + va_pa_offset)) |
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#define __va_to_pa_nodebug(x) ((unsigned long)(x) - va_pa_offset) |
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#ifdef CONFIG_DEBUG_VIRTUAL |
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extern phys_addr_t __virt_to_phys(unsigned long x); |
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extern phys_addr_t __phys_addr_symbol(unsigned long x); |
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#else |
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#define __virt_to_phys(x) __va_to_pa_nodebug(x) |
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#define __phys_addr_symbol(x) __va_to_pa_nodebug(x) |
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#endif /* CONFIG_DEBUG_VIRTUAL */ |
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#define __pa_symbol(x) __phys_addr_symbol(RELOC_HIDE((unsigned long)(x), 0)) |
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#define __pa(x) __virt_to_phys((unsigned long)(x)) |
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#define __va(x) ((void *)__pa_to_va_nodebug((phys_addr_t)(x))) |
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#define phys_to_pfn(phys) (PFN_DOWN(phys)) |
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#define pfn_to_phys(pfn) (PFN_PHYS(pfn)) |
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#define virt_to_pfn(vaddr) (phys_to_pfn(__pa(vaddr))) |
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#define pfn_to_virt(pfn) (__va(pfn_to_phys(pfn))) |
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#define virt_to_page(vaddr) (pfn_to_page(virt_to_pfn(vaddr))) |
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#define page_to_virt(page) (pfn_to_virt(page_to_pfn(page))) |
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#define page_to_phys(page) (pfn_to_phys(page_to_pfn(page))) |
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#define page_to_bus(page) (page_to_phys(page)) |
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#define phys_to_page(paddr) (pfn_to_page(phys_to_pfn(paddr))) |
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#ifdef CONFIG_FLATMEM |
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#define pfn_valid(pfn) \ |
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(((pfn) >= ARCH_PFN_OFFSET) && (((pfn) - ARCH_PFN_OFFSET) < max_mapnr)) |
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#endif |
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#endif /* __ASSEMBLY__ */ |
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#define virt_addr_valid(vaddr) ({ \ |
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unsigned long _addr = (unsigned long)vaddr; \ |
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(unsigned long)(_addr) >= PAGE_OFFSET && pfn_valid(virt_to_pfn(_addr)); \ |
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}) |
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#define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_NON_EXEC |
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#include <asm-generic/memory_model.h> |
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#include <asm-generic/getorder.h> |
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#endif /* _ASM_RISCV_PAGE_H */
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