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/* SPDX-License-Identifier: GPL-2.0 / #ifndef __ASM_SH_PAGE_H #define __ASM_SH_PAGE_H / * Copyright (C) 1999 Niibe Yutaka / #include <linux/const.h> / PAGE_SHIFT determines the page size / #if defined(CONFIG_PAGE_SIZE_4KB) # define PAGE_SHIFT 12 #elif defined(CONFIG_PAGE_SIZE_8KB) # define PAGE_SHIFT 13 #elif defined(CONFIG_PAGE_SIZE_16KB) # define PAGE_SHIFT 14 #elif defined(CONFIG_PAGE_SIZE_64KB) # define PAGE_SHIFT 16 #else # error "Bogus kernel page size?" #endif #define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT) #define PAGE_MASK (~(PAGE_SIZE-1)) #define PTE_MASK PAGE_MASK #if defined(CONFIG_HUGETLB_PAGE_SIZE_64K) #define HPAGE_SHIFT 16 #elif defined(CONFIG_HUGETLB_PAGE_SIZE_256K) #define HPAGE_SHIFT 18 #elif defined(CONFIG_HUGETLB_PAGE_SIZE_1MB) #define HPAGE_SHIFT 20 #elif defined(CONFIG_HUGETLB_PAGE_SIZE_4MB) #define HPAGE_SHIFT 22 #elif defined(CONFIG_HUGETLB_PAGE_SIZE_64MB) #define HPAGE_SHIFT 26 #elif defined(CONFIG_HUGETLB_PAGE_SIZE_512MB) #define HPAGE_SHIFT 29 #endif #ifdef CONFIG_HUGETLB_PAGE #define HPAGE_SIZE (1UL << HPAGE_SHIFT) #define HPAGE_MASK (~(HPAGE_SIZE-1)) #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT-PAGE_SHIFT) #endif #ifndef __ASSEMBLY__ #include <asm/uncached.h> extern unsigned long shm_align_mask; extern unsigned long max_low_pfn, min_low_pfn; extern unsigned long memory_start, memory_end, memory_limit; static inline unsigned long pages_do_alias(unsigned long addr1, unsigned long addr2) { return (addr1 ^ addr2) & shm_align_mask; } #define clear_page(page) memset((void )(page), 0, PAGE_SIZE) extern void copy_page(void to, void from); #define copy_user_page(to, from, vaddr, pg) __copy_user(to, from, PAGE_SIZE) struct page; struct vm_area_struct; extern void copy_user_highpage(struct page to, struct page from, unsigned long vaddr, struct vm_area_struct vma); #define __HAVE_ARCH_COPY_USER_HIGHPAGE extern void clear_user_highpage(struct page page, unsigned long vaddr); #define clear_user_highpage clear_user_highpage /* * These are used to make use of C type-checking.. / #ifdef CONFIG_X2TLB typedef struct { unsigned long pte_low, pte_high; } pte_t; typedef struct { unsigned long long pgprot; } pgprot_t; typedef struct { unsigned long long pgd; } pgd_t; #define pte_val(x) \ ((x).pte_low \| ((unsigned long long)(x).pte_high << 32)) #define __pte(x) \ ({ pte_t __pte = {(x), ((unsigned long long)(x)) >> 32}; __pte; }) #elif defined(CONFIG_SUPERH32) typedef struct { unsigned long pte_low; } pte_t; typedef struct { unsigned long pgprot; } pgprot_t; typedef struct { unsigned long pgd; } pgd_t; #define pte_val(x) ((x).pte_low) #define __pte(x) ((pte_t) { (x) } ) #else typedef struct { unsigned long long pte_low; } pte_t; typedef struct { unsigned long long pgprot; } pgprot_t; typedef struct { unsigned long pgd; } pgd_t; #define pte_val(x) ((x).pte_low) #define __pte(x) ((pte_t) { (x) } ) #endif #define pgd_val(x) ((x).pgd) #define pgprot_val(x) ((x).pgprot) #define __pgd(x) ((pgd_t) { (x) } ) #define __pgprot(x) ((pgprot_t) { (x) } ) typedef struct page pgtable_t; #define pte_pgprot(x) __pgprot(pte_val(x) & PTE_FLAGS_MASK) #endif /* !__ASSEMBLY__ / / * __MEMORY_START and SIZE are the physical addresses and size of RAM. / #define __MEMORY_START CONFIG_MEMORY_START #define __MEMORY_SIZE CONFIG_MEMORY_SIZE / * PHYSICAL_OFFSET is the offset in physical memory where the base * of the kernel is loaded. / #ifdef CONFIG_PHYSICAL_START #define PHYSICAL_OFFSET (CONFIG_PHYSICAL_START - __MEMORY_START) #else #define PHYSICAL_OFFSET 0 #endif / * PAGE_OFFSET is the virtual address of the start of kernel address * space. / #define PAGE_OFFSET CONFIG_PAGE_OFFSET / * Virtual to physical RAM address translation. * * In 29 bit mode, the physical offset of RAM from address 0 is visible in * the kernel virtual address space, and thus we don't have to take * this into account when translating. However in 32 bit mode this offset * is not visible (it is part of the PMB mapping) and so needs to be * added or subtracted as required. / #ifdef CONFIG_PMB #define ___pa(x) ((x)-PAGE_OFFSET+__MEMORY_START) #define ___va(x) ((x)+PAGE_OFFSET-__MEMORY_START) #else #define ___pa(x) ((x)-PAGE_OFFSET) #define ___va(x) ((x)+PAGE_OFFSET) #endif #ifndef __ASSEMBLY__ #define __pa(x) ___pa((unsigned long)x) #define __va(x) (void )___va((unsigned long)x) #endif /* !__ASSEMBLY__ / #ifdef CONFIG_UNCACHED_MAPPING #if defined(CONFIG_29BIT) #define UNCAC_ADDR(addr) P2SEGADDR(addr) #define CAC_ADDR(addr) P1SEGADDR(addr) #else #define UNCAC_ADDR(addr) ((addr) - PAGE_OFFSET + uncached_start) #define CAC_ADDR(addr) ((addr) - uncached_start + PAGE_OFFSET) #endif #else #define UNCAC_ADDR(addr) ((addr)) #define CAC_ADDR(addr) ((addr)) #endif #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) / * PFN = physical frame number (ie PFN 0 == physical address 0) * PFN_START is the PFN of the first page of RAM. By defining this we * don't have struct page entries for the portion of address space * between physical address 0 and the start of RAM. / #define PFN_START (__MEMORY_START >> PAGE_SHIFT) #define ARCH_PFN_OFFSET (PFN_START) #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) #ifdef CONFIG_FLATMEM #define pfn_valid(pfn) ((pfn) >= min_low_pfn && (pfn) < max_low_pfn) #endif #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) #define VM_DATA_DEFAULT_FLAGS (VM_READ \| VM_WRITE \| VM_EXEC \| \ VM_MAYREAD \| VM_MAYWRITE \| VM_MAYEXEC) #include <asm-generic/memory_model.h> #include <asm-generic/getorder.h> / * Some drivers need to perform DMA into kmalloc'ed buffers * and so we have to increase the kmalloc minalign for this. / #define ARCH_DMA_MINALIGN L1_CACHE_BYTES #ifdef CONFIG_SUPERH64 / * While BYTES_PER_WORD == 4 on the current sh64 ABI, GCC will still * happily generate {ld/st}.q pairs, requiring us to have 8-byte * alignment to avoid traps. The kmalloc alignment is guaranteed by * virtue of L1_CACHE_BYTES, requiring this to only be special cased * for slab caches. / #define ARCH_SLAB_MINALIGN 8 #endif #endif / __ASM_SH_PAGE_H */

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