Linux Kernel  3.7.1
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ioremap-nommu.c
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1 /*
2  * linux/arch/m32r/mm/ioremap-nommu.c
3  *
4  * Copyright (c) 2001, 2002 Hiroyuki Kondo
5  *
6  * Taken from mips version.
7  * (C) Copyright 1995 1996 Linus Torvalds
8  * (C) Copyright 2001 Ralf Baechle
9  */
10 
11 /*
12  * This file is subject to the terms and conditions of the GNU General Public
13  * License. See the file "COPYING" in the main directory of this archive
14  * for more details.
15  *
16  */
17 
18 #include <linux/module.h>
19 #include <asm/addrspace.h>
20 #include <asm/byteorder.h>
21 
22 #include <linux/vmalloc.h>
23 #include <asm/io.h>
24 #include <asm/pgalloc.h>
25 #include <asm/cacheflush.h>
26 #include <asm/tlbflush.h>
27 
28 
29 /*
30  * Remap an arbitrary physical address space into the kernel virtual
31  * address space. Needed when the kernel wants to access high addresses
32  * directly.
33  *
34  * NOTE! We need to allow non-page-aligned mappings too: we will obviously
35  * have to convert them into an offset in a page-aligned mapping, but the
36  * caller shouldn't need to know that small detail.
37  */
38 
39 #define IS_LOW512(addr) (!((unsigned long)(addr) & ~0x1fffffffUL))
40 
41 void __iomem *
42 __ioremap(unsigned long phys_addr, unsigned long size, unsigned long flags)
43 {
44  return (void *)phys_addr;
45 }
46 
47 #define IS_KSEG1(addr) (((unsigned long)(addr) & ~0x1fffffffUL) == KSEG1)
48 
49 void iounmap(volatile void __iomem *addr)
50 {
51 }
52