/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _PARISC_PAGE_H #define _PARISC_PAGE_H #include #if defined(CONFIG_PARISC_PAGE_SIZE_4KB) # define PAGE_SHIFT 12 #elif defined(CONFIG_PARISC_PAGE_SIZE_16KB) # define PAGE_SHIFT 14 #elif defined(CONFIG_PARISC_PAGE_SIZE_64KB) # define PAGE_SHIFT 16 #else # error "unknown default kernel page size" #endif #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) #define PAGE_MASK (~(PAGE_SIZE-1)) #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA #ifndef __ASSEMBLY__ #include #include #define clear_page(page) clear_page_asm((void *)(page)) #define copy_page(to, from) copy_page_asm((void *)(to), (void *)(from)) struct page; struct vm_area_struct; void clear_page_asm(void *page); void copy_page_asm(void *to, void *from); #define clear_user_page(vto, vaddr, page) clear_page_asm(vto) void copy_user_highpage(struct page *to, struct page *from, unsigned long vaddr, struct vm_area_struct *vma); #define __HAVE_ARCH_COPY_USER_HIGHPAGE /* * These are used to make use of C type-checking.. */ #define STRICT_MM_TYPECHECKS #ifdef STRICT_MM_TYPECHECKS typedef struct { unsigned long pte; } pte_t; /* either 32 or 64bit */ /* NOTE: even on 64 bits, these entries are __u32 because we allocate * the pmd and pgd in ZONE_DMA (i.e. under 4GB) */ typedef struct { __u32 pgd; } pgd_t; typedef struct { unsigned long pgprot; } pgprot_t; #if CONFIG_PGTABLE_LEVELS == 3 typedef struct { __u32 pmd; } pmd_t; #define __pmd(x) ((pmd_t) { (x) } ) /* pXd_val() do not work as lvalues, so make sure we don't use them as such. */ #define pmd_val(x) ((x).pmd + 0) #endif #define pte_val(x) ((x).pte) #define pgd_val(x) ((x).pgd + 0) #define pgprot_val(x) ((x).pgprot) #define __pte(x) ((pte_t) { (x) } ) #define __pgd(x) ((pgd_t) { (x) } ) #define __pgprot(x) ((pgprot_t) { (x) } ) #else /* * .. while these make it easier on the compiler */ typedef unsigned long pte_t; #if CONFIG_PGTABLE_LEVELS == 3 typedef __u32 pmd_t; #define pmd_val(x) (x) #define __pmd(x) (x) #endif typedef __u32 pgd_t; typedef unsigned long pgprot_t; #define pte_val(x) (x) #define pgd_val(x) (x) #define pgprot_val(x) (x) #define __pte(x) (x) #define __pgd(x) (x) #define __pgprot(x) (x) #endif /* STRICT_MM_TYPECHECKS */ #define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval)) #if CONFIG_PGTABLE_LEVELS == 3 #define set_pud(pudptr, pudval) (*(pudptr) = (pudval)) #endif typedef struct page *pgtable_t; typedef struct __physmem_range { unsigned long start_pfn; unsigned long pages; /* PAGE_SIZE pages */ } physmem_range_t; extern physmem_range_t pmem_ranges[]; extern int npmem_ranges; #endif /* !__ASSEMBLY__ */ /* WARNING: The definitions below must match exactly to sizeof(pte_t) * etc */ #ifdef CONFIG_64BIT #define BITS_PER_PTE_ENTRY 3 #define BITS_PER_PMD_ENTRY 2 #define BITS_PER_PGD_ENTRY 2 #else #define BITS_PER_PTE_ENTRY 2 #define BITS_PER_PMD_ENTRY 2 #define BITS_PER_PGD_ENTRY 2 #endif #define PGD_ENTRY_SIZE (1UL << BITS_PER_PGD_ENTRY) #define PMD_ENTRY_SIZE (1UL << BITS_PER_PMD_ENTRY) #define PTE_ENTRY_SIZE (1UL << BITS_PER_PTE_ENTRY) #define LINUX_GATEWAY_SPACE 0 /* This governs the relationship between virtual and physical addresses. * If you alter it, make sure to take care of our various fixed mapping * segments in fixmap.h */ #ifdef CONFIG_64BIT #define __PAGE_OFFSET_DEFAULT (0x40000000) /* 1GB */ #else #define __PAGE_OFFSET_DEFAULT (0x10000000) /* 256MB */ #endif #if defined(BOOTLOADER) #define __PAGE_OFFSET (0) /* bootloader uses physical addresses */ #else #define __PAGE_OFFSET __PAGE_OFFSET_DEFAULT #endif /* BOOTLOADER */ #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) /* The size of the gateway page (we leave lots of room for expansion) */ #define GATEWAY_PAGE_SIZE 0x4000 /* The start of the actual kernel binary---used in vmlinux.lds.S * Leave some space after __PAGE_OFFSET for detecting kernel null * ptr derefs */ #define KERNEL_BINARY_TEXT_START (__PAGE_OFFSET + 0x100000) /* These macros don't work for 64-bit C code -- don't allow in C at all */ #ifdef __ASSEMBLY__ # define PA(x) ((x)-__PAGE_OFFSET) # define VA(x) ((x)+__PAGE_OFFSET) #endif #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET) #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) #ifdef CONFIG_HUGETLB_PAGE #define HPAGE_SHIFT PMD_SHIFT /* fixed for transparent huge pages */ #define HPAGE_SIZE ((1UL) << HPAGE_SHIFT) #define HPAGE_MASK (~(HPAGE_SIZE - 1)) #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) #if defined(CONFIG_64BIT) && defined(CONFIG_PARISC_PAGE_SIZE_4KB) # define REAL_HPAGE_SHIFT 20 /* 20 = 1MB */ # define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_1M #elif !defined(CONFIG_64BIT) && defined(CONFIG_PARISC_PAGE_SIZE_4KB) # define REAL_HPAGE_SHIFT 22 /* 22 = 4MB */ # define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_4M #else # define REAL_HPAGE_SHIFT 24 /* 24 = 16MB */ # define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_16M #endif #endif /* CONFIG_HUGETLB_PAGE */ #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) #include #include #include #define PAGE0 ((struct zeropage *)absolute_pointer(__PAGE_OFFSET)) /* DEFINITION OF THE ZERO-PAGE (PAG0) */ /* based on work by Jason Eckhardt (jason@equator.com) */ #endif /* _PARISC_PAGE_H */