Linux kernel & device driver programming

Cross-Referenced Linux and Device Driver Code

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Version: [ 2.6.11.8 ] [ 2.6.25 ] [ 2.6.25.8 ] [ 2.6.31.13 ] Architecture: [ i386 ]
  1 /*
  2  *  linux/include/asm-arm/page-nommu.h
  3  *
  4  *  Copyright (C) 2004 Hyok S. Choi
  5  *
  6  * This program is free software; you can redistribute it and/or modify
  7  * it under the terms of the GNU General Public License version 2 as
  8  * published by the Free Software Foundation.
  9  */
 10 #ifndef _ASMARM_PAGE_NOMMU_H
 11 #define _ASMARM_PAGE_NOMMU_H
 12 
 13 #if !defined(CONFIG_SMALL_TASKS) && PAGE_SHIFT < 13
 14 #define KTHREAD_SIZE (8192)
 15 #else
 16 #define KTHREAD_SIZE PAGE_SIZE
 17 #endif
 18  
 19 #define get_user_page(vaddr)            __get_free_page(GFP_KERNEL)
 20 #define free_user_page(page, addr)      free_page(addr)
 21 
 22 #define clear_page(page)        memset((page), 0, PAGE_SIZE)
 23 #define copy_page(to,from)      memcpy((to), (from), PAGE_SIZE)
 24 
 25 #define clear_user_page(page, vaddr, pg)        clear_page(page)
 26 #define copy_user_page(to, from, vaddr, pg)     copy_page(to, from)
 27 
 28 /*
 29  * These are used to make use of C type-checking..
 30  */
 31 typedef unsigned long pte_t;
 32 typedef unsigned long pmd_t;
 33 typedef unsigned long pgd_t[2];
 34 typedef unsigned long pgprot_t;
 35 
 36 #define pte_val(x)      (x)
 37 #define pmd_val(x)      (x)
 38 #define pgd_val(x)      ((x)[0])
 39 #define pgprot_val(x)   (x)
 40 
 41 #define __pte(x)        (x)
 42 #define __pmd(x)        (x)
 43 #define __pgprot(x)     (x)
 44 
 45 /* to align the pointer to the (next) page boundary */
 46 #define PAGE_ALIGN(addr)        (((addr)+PAGE_SIZE-1)&PAGE_MASK)
 47 
 48 extern unsigned long memory_start;
 49 extern unsigned long memory_end;
 50 
 51 #endif
 52 
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