/* SPDX-License-Identifier: GPL-2.0 */ /* * Copyright (C) 2020-2022 Loongson Technology Corporation Limited */ #ifndef _ASM_PAGE_H #define _ASM_PAGE_H #include <linux/const.h> #include <asm/addrspace.h> /* * PAGE_SHIFT determines the page size */ #ifdef CONFIG_PAGE_SIZE_4KB #define PAGE_SHIFT 12 #endif #ifdef CONFIG_PAGE_SIZE_16KB #define PAGE_SHIFT 14 #endif #ifdef CONFIG_PAGE_SIZE_64KB #define PAGE_SHIFT 16 #endif #define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT) #define PAGE_MASK (~(PAGE_SIZE - 1)) #define HPAGE_SHIFT (PAGE_SHIFT + PAGE_SHIFT - 3) #define HPAGE_SIZE (_AC(1, UL) << HPAGE_SHIFT) #define HPAGE_MASK (~(HPAGE_SIZE - 1)) #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) #ifndef __ASSEMBLY__ #include <linux/kernel.h> #include <linux/pfn.h> /* * It's normally defined only for FLATMEM config but it's * used in our early mem init code for all memory models. * So always define it. */ #define ARCH_PFN_OFFSET PFN_UP(PHYS_OFFSET) extern void clear_page(void *page); extern void copy_page(void *to, void *from); #define clear_user_page(page, vaddr, pg) clear_page(page) #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) extern unsigned long shm_align_mask; struct page; struct vm_area_struct; void copy_user_highpage(struct page *to, struct page *from, unsigned long vaddr, struct vm_area_struct *vma); #define __HAVE_ARCH_COPY_USER_HIGHPAGE typedef struct { unsigned long pte; } pte_t; #define pte_val(x) ((x).pte) #define __pte(x) ((pte_t) { (x) }) typedef struct page *pgtable_t; typedef struct { unsigned long pgd; } pgd_t; #define pgd_val(x) ((x).pgd) #define __pgd(x) ((pgd_t) { (x) }) /* * Manipulate page protection bits */ typedef struct { unsigned long pgprot; } pgprot_t; #define pgprot_val(x) ((x).pgprot) #define __pgprot(x) ((pgprot_t) { (x) }) #define pte_pgprot(x) __pgprot(pte_val(x) & ~_PFN_MASK) #define ptep_buddy(x) ((pte_t *)((unsigned long)(x) ^ sizeof(pte_t))) /* * __pa()/__va() should be used only during mem init. */ #define __pa(x) PHYSADDR(x) #define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET - PHYS_OFFSET)) #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) #define sym_to_pfn(x) __phys_to_pfn(__pa_symbol(x)) #define virt_to_pfn(kaddr) PFN_DOWN(PHYSADDR(kaddr)) #define virt_to_page(kaddr) \ ({ \ (likely((unsigned long)kaddr < vm_map_base)) ? \ dmw_virt_to_page((unsigned long)kaddr) : tlb_virt_to_page((unsigned long)kaddr);\ }) extern int __virt_addr_valid(volatile void *kaddr); #define virt_addr_valid(kaddr) __virt_addr_valid((volatile void *)(kaddr)) #define VM_DATA_DEFAULT_FLAGS \ (VM_READ | VM_WRITE | \ ((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) | \ VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) #include <asm-generic/memory_model.h> #include <asm-generic/getorder.h> #endif /* !__ASSEMBLY__ */ #endif /* _ASM_PAGE_H */