192 lines
5.5 KiB
C
192 lines
5.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2009 Chen Liqin <liqin.chen@sunplusct.com>
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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 <zhuxiaoj@ict.ac.cn>
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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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#ifdef CONFIG_64BIT
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#ifdef CONFIG_MMU
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#define PAGE_OFFSET kernel_map.page_offset
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#else
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#define PAGE_OFFSET _AC(CONFIG_PAGE_OFFSET, UL)
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#endif
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/*
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* By default, CONFIG_PAGE_OFFSET value corresponds to SV48 address space so
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* define the PAGE_OFFSET value for SV39.
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*/
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#define PAGE_OFFSET_L4 _AC(0xffffaf8000000000, UL)
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#define PAGE_OFFSET_L3 _AC(0xffffffd800000000, UL)
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#else
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#define PAGE_OFFSET _AC(CONFIG_PAGE_OFFSET, UL)
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#endif /* CONFIG_64BIT */
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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 page_offset;
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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) < PAGE_OFFSET + KERN_VIRT_SIZE))
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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 phys_to_page(paddr) (pfn_to_page(phys_to_pfn(paddr)))
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#define sym_to_pfn(x) __phys_to_pfn(__pa_symbol(x))
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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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