^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * Copyright (C) 2011 Tobias Klauser <tklauser@distanz.ch>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 2004 Microtronix Datacom Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * MMU support based on asm/page.h from mips which is:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright (C) 1994 - 1999, 2000, 03 Ralf Baechle
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * This file is subject to the terms and conditions of the GNU General Public
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * License. See the file "COPYING" in the main directory of this archive
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #ifndef _ASM_NIOS2_PAGE_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #define _ASM_NIOS2_PAGE_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/pfn.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/const.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * PAGE_SHIFT determines the page size
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define PAGE_SHIFT 12
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define PAGE_MASK (~(PAGE_SIZE - 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * PAGE_OFFSET -- the first address of the first page of memory.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define PAGE_OFFSET \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) (CONFIG_NIOS2_MEM_BASE + CONFIG_NIOS2_KERNEL_REGION_BASE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #ifndef __ASSEMBLY__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * This gives the physical RAM offset.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #define PHYS_OFFSET CONFIG_NIOS2_MEM_BASE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) * It's normally defined only for FLATMEM config but it's
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) * used in our early mem init code for all memory models.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) * So always define it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #define ARCH_PFN_OFFSET PFN_UP(PHYS_OFFSET)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #define clear_page(page) memset((page), 0, PAGE_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #define copy_page(to, from) memcpy((to), (from), PAGE_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) struct page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) extern void clear_user_page(void *addr, unsigned long vaddr, struct page *page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) extern void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) struct page *to);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) * These are used to make use of C type-checking.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) typedef struct page *pgtable_t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) typedef struct { unsigned long pte; } pte_t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) typedef struct { unsigned long pgd; } pgd_t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) typedef struct { unsigned long pgprot; } pgprot_t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) #define pte_val(x) ((x).pte)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) #define pgd_val(x) ((x).pgd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) #define pgprot_val(x) ((x).pgprot)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) #define __pte(x) ((pte_t) { (x) })
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) #define __pgd(x) ((pgd_t) { (x) })
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) #define __pgprot(x) ((pgprot_t) { (x) })
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) extern unsigned long memory_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) extern unsigned long memory_end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) extern unsigned long memory_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) extern struct page *mem_map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) # define __pa(x) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) ((unsigned long)(x) - PAGE_OFFSET + PHYS_OFFSET)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) # define __va(x) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) ((void *)((unsigned long)(x) + PAGE_OFFSET - PHYS_OFFSET))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) #define page_to_virt(page) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) ((void *)(((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) # define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) static inline bool pfn_valid(unsigned long pfn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) /* avoid <linux/mm.h> include hell */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) extern unsigned long max_mapnr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) unsigned long pfn_offset = ARCH_PFN_OFFSET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) return pfn >= pfn_offset && pfn < max_mapnr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) # define virt_to_page(vaddr) pfn_to_page(PFN_DOWN(virt_to_phys(vaddr)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) # define virt_addr_valid(vaddr) pfn_valid(PFN_DOWN(virt_to_phys(vaddr)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) # define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_NON_EXEC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) #include <asm-generic/memory_model.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) #include <asm-generic/getorder.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) #endif /* !__ASSEMBLY__ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) #endif /* _ASM_NIOS2_PAGE_H */
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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