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92 lines
2.2 KiB
92 lines
2.2 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* |
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* OpenRISC Linux |
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* |
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* Linux architectural port borrowing liberally from similar works of |
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* others. All original copyrights apply as per the original source |
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* declaration. |
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* |
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* OpenRISC implementation: |
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* Copyright (C) 2003 Matjaz Breskvar <[email protected]> |
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* Copyright (C) 2010-2011 Jonas Bonn <[email protected]> |
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* et al. |
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*/ |
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#ifndef __ASM_OPENRISC_PAGE_H |
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#define __ASM_OPENRISC_PAGE_H |
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/* PAGE_SHIFT determines the page size */ |
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#define PAGE_SHIFT 13 |
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#ifdef __ASSEMBLY__ |
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#define PAGE_SIZE (1 << PAGE_SHIFT) |
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#else |
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#define PAGE_SIZE (1UL << PAGE_SHIFT) |
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#endif |
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#define PAGE_MASK (~(PAGE_SIZE-1)) |
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#define PAGE_OFFSET 0xc0000000 |
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#define KERNELBASE PAGE_OFFSET |
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/* This is not necessarily the right place for this, but it's needed by |
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* drivers/of/fdt.c |
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*/ |
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#include <asm/setup.h> |
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#ifndef __ASSEMBLY__ |
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#define clear_page(page) memset((page), 0, PAGE_SIZE) |
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#define copy_page(to, from) memcpy((to), (from), PAGE_SIZE) |
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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 { |
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unsigned long pte; |
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} pte_t; |
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typedef struct { |
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unsigned long pgd; |
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} pgd_t; |
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typedef struct { |
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unsigned long pgprot; |
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} 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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#endif /* !__ASSEMBLY__ */ |
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#ifndef __ASSEMBLY__ |
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#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET)) |
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#define __pa(x) ((unsigned long) (x) - PAGE_OFFSET) |
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#define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT) |
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#define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT) |
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#define virt_to_page(addr) \ |
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(mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT)) |
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#define page_to_phys(page) ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT) |
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#define pfn_valid(pfn) ((pfn) < max_mapnr) |
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#define virt_addr_valid(kaddr) (pfn_valid(virt_to_pfn(kaddr))) |
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#endif /* __ASSEMBLY__ */ |
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#include <asm-generic/memory_model.h> |
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#include <asm-generic/getorder.h> |
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#endif /* __ASM_OPENRISC_PAGE_H */
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