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/
usr/
src/
linux-headers-3.0.0-14/
arch/
avr32/
include/
asm/
- drwxr-xr-x
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Viewing file: page.h (3.05 KB) -rw-r--r--Select action/file-type:  ( +) |  ( +) |  ( +) | Code ( +) | Session ( +) |  ( +) | SDB ( +) |  ( +) |  ( +) |  ( +) |  ( +) |  ( +) |
/* * Copyright (C) 2004-2006 Atmel Corporation * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #ifndef __ASM_AVR32_PAGE_H #define __ASM_AVR32_PAGE_H
#include <linux/const.h>
/* PAGE_SHIFT determines the page size */ #define PAGE_SHIFT 12 #define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT) #define PAGE_MASK (~(PAGE_SIZE-1)) #define PTE_MASK PAGE_MASK
#ifndef __ASSEMBLY__
#include <asm/addrspace.h>
extern void clear_page(void *to); extern void copy_page(void *to, void *from);
#define clear_user_page(page, vaddr, pg) clear_page(page) #define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
/* * These are used to make use of C type-checking.. */ typedef struct { unsigned long pte; } pte_t; typedef struct { unsigned long pgd; } pgd_t; typedef struct { unsigned long pgprot; } pgprot_t; typedef struct page *pgtable_t;
#define pte_val(x) ((x).pte) #define pgd_val(x) ((x).pgd) #define pgprot_val(x) ((x).pgprot)
#define __pte(x) ((pte_t) { (x) }) #define __pgd(x) ((pgd_t) { (x) }) #define __pgprot(x) ((pgprot_t) { (x) })
/* FIXME: These should be removed soon */ extern unsigned long memory_start, memory_end;
/* Pure 2^n version of get_order */ static inline int get_order(unsigned long size) { unsigned lz;
size = (size - 1) >> PAGE_SHIFT; asm("clz %0, %1" : "=r"(lz) : "r"(size)); return 32 - lz; }
#endif /* !__ASSEMBLY__ */
/* * The hardware maps the virtual addresses 0x80000000 -> 0x9fffffff * permanently to the physical addresses 0x00000000 -> 0x1fffffff when * segmentation is enabled. We want to make use of this in order to * minimize TLB pressure. */ #define PAGE_OFFSET (0x80000000UL)
/* * ALSA uses virt_to_page() on DMA pages, which I'm not entirely sure * is a good idea. Anyway, we can't simply subtract PAGE_OFFSET here * in that case, so we'll have to mask out the three most significant * bits of the address instead... * * What's the difference between __pa() and virt_to_phys() anyway? */ #define __pa(x) PHYSADDR(x) #define __va(x) ((void *)(P1SEGADDR(x)))
#define MAP_NR(addr) (((unsigned long)(addr) - PAGE_OFFSET) >> PAGE_SHIFT)
#define phys_to_page(phys) (pfn_to_page(phys >> PAGE_SHIFT)) #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
#ifndef CONFIG_NEED_MULTIPLE_NODES
#define PHYS_PFN_OFFSET (CONFIG_PHYS_OFFSET >> PAGE_SHIFT)
#define pfn_to_page(pfn) (mem_map + ((pfn) - PHYS_PFN_OFFSET)) #define page_to_pfn(page) ((unsigned long)((page) - mem_map) + PHYS_PFN_OFFSET) #define pfn_valid(pfn) ((pfn) >= PHYS_PFN_OFFSET && (pfn) < (PHYS_PFN_OFFSET + max_mapnr)) #endif /* CONFIG_NEED_MULTIPLE_NODES */
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | \ VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
/* * Memory above this physical address will be considered highmem. */ #define HIGHMEM_START 0x20000000UL
#endif /* __ASM_AVR32_PAGE_H */
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