130 lines
3.9 KiB
C
130 lines
3.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _METAG_PAGE_H
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#define _METAG_PAGE_H
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#include <linux/const.h>
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#include <asm/metag_mem.h>
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/* PAGE_SHIFT determines the page size */
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#if defined(CONFIG_PAGE_SIZE_4K)
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#define PAGE_SHIFT 12
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#elif defined(CONFIG_PAGE_SIZE_8K)
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#define PAGE_SHIFT 13
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#elif defined(CONFIG_PAGE_SIZE_16K)
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#define PAGE_SHIFT 14
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#endif
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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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#if defined(CONFIG_HUGETLB_PAGE_SIZE_8K)
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# define HPAGE_SHIFT 13
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#elif defined(CONFIG_HUGETLB_PAGE_SIZE_16K)
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# define HPAGE_SHIFT 14
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#elif defined(CONFIG_HUGETLB_PAGE_SIZE_32K)
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# define HPAGE_SHIFT 15
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#elif defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
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# define HPAGE_SHIFT 16
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#elif defined(CONFIG_HUGETLB_PAGE_SIZE_128K)
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# define HPAGE_SHIFT 17
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#elif defined(CONFIG_HUGETLB_PAGE_SIZE_256K)
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# define HPAGE_SHIFT 18
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#elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K)
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# define HPAGE_SHIFT 19
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#elif defined(CONFIG_HUGETLB_PAGE_SIZE_1M)
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# define HPAGE_SHIFT 20
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#elif defined(CONFIG_HUGETLB_PAGE_SIZE_2M)
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# define HPAGE_SHIFT 21
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#elif defined(CONFIG_HUGETLB_PAGE_SIZE_4M)
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# define HPAGE_SHIFT 22
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#endif
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#ifdef CONFIG_HUGETLB_PAGE
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# define HPAGE_SIZE (1UL << 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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* We define our own hugetlb_get_unmapped_area so we don't corrupt 2nd level
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* page tables with normal pages in them.
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*/
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# define HUGEPT_SHIFT (22)
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# define HUGEPT_ALIGN (1 << HUGEPT_SHIFT)
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# define HUGEPT_MASK (HUGEPT_ALIGN - 1)
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# define ALIGN_HUGEPT(x) ALIGN(x, HUGEPT_ALIGN)
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# define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
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#endif
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#ifndef __ASSEMBLY__
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/* On the Meta, we would like to know if the address (heap) we have is
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* in local or global space.
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*/
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#define is_global_space(addr) ((addr) > 0x7fffffff)
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#define is_local_space(addr) (!is_global_space(addr))
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extern void clear_page(void *to);
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extern void copy_page(void *to, void *from);
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#define clear_user_page(page, vaddr, pg) clear_page(page)
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#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
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/*
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* These are used to make use of C type-checking..
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*/
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typedef struct { unsigned long pte; } pte_t;
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typedef struct { unsigned long pgd; } pgd_t;
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typedef struct { unsigned long pgprot; } 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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/* The kernel must now ALWAYS live at either 0xC0000000 or 0x40000000 - that
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* being either global or local space.
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*/
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#define PAGE_OFFSET (CONFIG_PAGE_OFFSET)
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#if PAGE_OFFSET >= LINGLOBAL_BASE
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#define META_MEMORY_BASE LINGLOBAL_BASE
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#define META_MEMORY_LIMIT LINGLOBAL_LIMIT
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#else
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#define META_MEMORY_BASE LINLOCAL_BASE
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#define META_MEMORY_LIMIT LINLOCAL_LIMIT
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#endif
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/* Offset between physical and virtual mapping of kernel memory. */
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extern unsigned int meta_memoffset;
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#define __pa(x) ((unsigned long)(((unsigned long)(x)) - meta_memoffset))
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#define __va(x) ((void *)((unsigned long)(((unsigned long)(x)) + meta_memoffset)))
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extern unsigned long pfn_base;
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#define ARCH_PFN_OFFSET (pfn_base)
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#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
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#define page_to_virt(page) __va(page_to_pfn(page) << PAGE_SHIFT)
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#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
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#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
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#ifdef CONFIG_FLATMEM
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extern unsigned long max_pfn;
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extern unsigned long min_low_pfn;
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#define pfn_valid(pfn) ((pfn) >= min_low_pfn && (pfn) < max_pfn)
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#endif
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#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
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#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
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VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
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#include <asm-generic/memory_model.h>
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#include <asm-generic/getorder.h>
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#endif /* __ASSMEBLY__ */
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#endif /* _METAG_PAGE_H */
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