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page-nommu.h
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1 /*
2  * arch/arm/include/asm/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 
11 #ifndef _ASMARM_PAGE_NOMMU_H
12 #define _ASMARM_PAGE_NOMMU_H
13 
14 #if !defined(CONFIG_SMALL_TASKS) && PAGE_SHIFT < 13
15 #define KTHREAD_SIZE (8192)
16 #else
17 #define KTHREAD_SIZE PAGE_SIZE
18 #endif
19 
20 #define get_user_page(vaddr) __get_free_page(GFP_KERNEL)
21 #define free_user_page(page, addr) free_page(addr)
22 
23 #define clear_page(page) memset((page), 0, PAGE_SIZE)
24 #define copy_page(to,from) memcpy((to), (from), PAGE_SIZE)
25 
26 #define clear_user_page(page, vaddr, pg) clear_page(page)
27 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
28 
29 /*
30  * These are used to make use of C type-checking..
31  */
32 typedef unsigned long pte_t;
33 typedef unsigned long pmd_t;
34 typedef unsigned long pgd_t[2];
35 typedef unsigned long pgprot_t;
36 
37 #define pte_val(x) (x)
38 #define pmd_val(x) (x)
39 #define pgd_val(x) ((x)[0])
40 #define pgprot_val(x) (x)
41 
42 #define __pte(x) (x)
43 #define __pmd(x) (x)
44 #define __pgprot(x) (x)
45 
46 #endif