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177 lines
5.1 KiB
177 lines
5.1 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 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 riscv_pfn_base; |
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#define ARCH_PFN_OFFSET (riscv_pfn_base) |
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#else |
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#define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT) |
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#endif /* CONFIG_MMU */ |
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struct kernel_mapping { |
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unsigned long virt_addr; |
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uintptr_t phys_addr; |
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uintptr_t size; |
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/* Offset between linear mapping virtual address and kernel load address */ |
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unsigned long va_pa_offset; |
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/* Offset between kernel mapping virtual address and kernel load address */ |
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unsigned long va_kernel_pa_offset; |
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unsigned long va_kernel_xip_pa_offset; |
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#ifdef CONFIG_XIP_KERNEL |
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uintptr_t xiprom; |
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uintptr_t xiprom_sz; |
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#endif |
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}; |
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extern struct kernel_mapping kernel_map; |
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extern phys_addr_t phys_ram_base; |
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#define is_kernel_mapping(x) \ |
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((x) >= kernel_map.virt_addr && (x) < (kernel_map.virt_addr + kernel_map.size)) |
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#define is_linear_mapping(x) \ |
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((x) >= PAGE_OFFSET && (!IS_ENABLED(CONFIG_64BIT) || (x) < kernel_map.virt_addr)) |
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#define linear_mapping_pa_to_va(x) ((void *)((unsigned long)(x) + kernel_map.va_pa_offset)) |
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#define kernel_mapping_pa_to_va(y) ({ \ |
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unsigned long _y = y; \ |
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(IS_ENABLED(CONFIG_XIP_KERNEL) && _y < phys_ram_base) ? \ |
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(void *)((unsigned long)(_y) + kernel_map.va_kernel_xip_pa_offset) : \ |
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(void *)((unsigned long)(_y) + kernel_map.va_kernel_pa_offset + XIP_OFFSET); \ |
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}) |
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#define __pa_to_va_nodebug(x) linear_mapping_pa_to_va(x) |
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#define linear_mapping_va_to_pa(x) ((unsigned long)(x) - kernel_map.va_pa_offset) |
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#define kernel_mapping_va_to_pa(y) ({ \ |
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unsigned long _y = y; \ |
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(IS_ENABLED(CONFIG_XIP_KERNEL) && _y < kernel_map.virt_addr + XIP_OFFSET) ? \ |
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((unsigned long)(_y) - kernel_map.va_kernel_xip_pa_offset) : \ |
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((unsigned long)(_y) - kernel_map.va_kernel_pa_offset - XIP_OFFSET); \ |
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}) |
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#define __va_to_pa_nodebug(x) ({ \ |
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unsigned long _x = x; \ |
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is_linear_mapping(_x) ? \ |
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linear_mapping_va_to_pa(_x) : kernel_mapping_va_to_pa(_x); \ |
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}) |
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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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