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145 lines
4.1 KiB
145 lines
4.1 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* VM ops |
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* |
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* Copyright (C) 2008-2009 Michal Simek <[email protected]> |
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* Copyright (C) 2008-2009 PetaLogix |
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* Copyright (C) 2006 Atmark Techno, Inc. |
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* Changes for MMU support: |
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* Copyright (C) 2007 Xilinx, Inc. All rights reserved. |
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*/ |
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#ifndef _ASM_MICROBLAZE_PAGE_H |
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#define _ASM_MICROBLAZE_PAGE_H |
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#include <linux/pfn.h> |
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#include <asm/setup.h> |
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#include <asm/asm-compat.h> |
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#include <linux/const.h> |
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#ifdef __KERNEL__ |
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/* PAGE_SHIFT determines the page size */ |
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#define PAGE_SHIFT 12 |
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#define PAGE_SIZE (ASM_CONST(1) << PAGE_SHIFT) |
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#define PAGE_MASK (~(PAGE_SIZE-1)) |
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#define LOAD_OFFSET ASM_CONST((CONFIG_KERNEL_START-CONFIG_KERNEL_BASE_ADDR)) |
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#define PTE_SHIFT (PAGE_SHIFT - 2) /* 1024 ptes per page */ |
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#ifndef __ASSEMBLY__ |
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/* MS be sure that SLAB allocates aligned objects */ |
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#define ARCH_DMA_MINALIGN L1_CACHE_BYTES |
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#define ARCH_SLAB_MINALIGN L1_CACHE_BYTES |
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#define PAGE_UP(addr) (((addr)+((PAGE_SIZE)-1))&(~((PAGE_SIZE)-1))) |
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#define PAGE_DOWN(addr) ((addr)&(~((PAGE_SIZE)-1))) |
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/* |
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* PAGE_OFFSET -- the first address of the first page of memory. With MMU |
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* it is set to the kernel start address (aligned on a page boundary). |
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* |
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* CONFIG_KERNEL_START is defined in arch/microblaze/config.in and used |
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* in arch/microblaze/Makefile. |
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*/ |
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#define PAGE_OFFSET CONFIG_KERNEL_START |
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/* |
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* The basic type of a PTE - 32 bit physical addressing. |
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*/ |
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typedef unsigned long pte_basic_t; |
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#define PTE_FMT "%.8lx" |
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# define copy_page(to, from) memcpy((to), (from), PAGE_SIZE) |
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# define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE) |
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# define clear_user_page(pgaddr, vaddr, page) memset((pgaddr), 0, PAGE_SIZE) |
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# define copy_user_page(vto, vfrom, vaddr, topg) \ |
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memcpy((vto), (vfrom), PAGE_SIZE) |
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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 page *pgtable_t; |
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typedef struct { unsigned long pte; } pte_t; |
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typedef struct { unsigned long pgprot; } pgprot_t; |
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/* FIXME this can depend on linux kernel version */ |
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typedef struct { unsigned long pgd; } pgd_t; |
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# define pte_val(x) ((x).pte) |
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# define pgprot_val(x) ((x).pgprot) |
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# define pgd_val(x) ((x).pgd) |
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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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/** |
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* Conversions for virtual address, physical address, pfn, and struct |
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* page are defined in the following files. |
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* |
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* virt -+ |
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* | asm-microblaze/page.h |
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* phys -+ |
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* | linux/pfn.h |
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* pfn -+ |
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* | asm-generic/memory_model.h |
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* page -+ |
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* |
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*/ |
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extern unsigned long max_low_pfn; |
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extern unsigned long min_low_pfn; |
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extern unsigned long max_pfn; |
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extern unsigned long memory_start; |
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extern unsigned long memory_size; |
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extern unsigned long lowmem_size; |
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extern unsigned long kernel_tlb; |
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extern int page_is_ram(unsigned long pfn); |
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# define phys_to_pfn(phys) (PFN_DOWN(phys)) |
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# define pfn_to_phys(pfn) (PFN_PHYS(pfn)) |
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# define virt_to_pfn(vaddr) (phys_to_pfn((__pa(vaddr)))) |
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# define pfn_to_virt(pfn) __va(pfn_to_phys((pfn))) |
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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 page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) |
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# define ARCH_PFN_OFFSET (memory_start >> PAGE_SHIFT) |
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# define pfn_valid(pfn) ((pfn) < (max_mapnr + ARCH_PFN_OFFSET)) |
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# endif /* __ASSEMBLY__ */ |
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#define virt_addr_valid(vaddr) (pfn_valid(virt_to_pfn(vaddr))) |
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# define __pa(x) __virt_to_phys((unsigned long)(x)) |
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# define __va(x) ((void *)__phys_to_virt((unsigned long)(x))) |
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/* Convert between virtual and physical address for MMU. */ |
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/* Handle MicroBlaze processor with virtual memory. */ |
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#define __virt_to_phys(addr) \ |
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((addr) + CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START) |
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#define __phys_to_virt(addr) \ |
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((addr) + CONFIG_KERNEL_START - CONFIG_KERNEL_BASE_ADDR) |
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#define tophys(rd, rs) \ |
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addik rd, rs, (CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START) |
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#define tovirt(rd, rs) \ |
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addik rd, rs, (CONFIG_KERNEL_START - CONFIG_KERNEL_BASE_ADDR) |
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#define TOPHYS(addr) __virt_to_phys(addr) |
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#endif /* __KERNEL__ */ |
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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_MICROBLAZE_PAGE_H */
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