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1 /*
2  * Copyright 2006 PathScale, Inc.  All Rights Reserved.
3  *
4  * This file is free software; you can redistribute it and/or modify
5  * it under the terms of version 2 of the GNU General Public License
6  * as published by the Free Software Foundation.
7  *
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11  * GNU General Public License for more details.
12  *
13  * You should have received a copy of the GNU General Public License
14  * along with this program; if not, write to the Free Software Foundation,
15  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
16  */
17 
18 #ifndef _LINUX_IO_H
19 #define _LINUX_IO_H
20 
21 #include <linux/types.h>
22 #include <asm/io.h>
23 #include <asm/page.h>
24 
25 struct device;
26 
27 void __iowrite32_copy(void __iomem *to, const void *from, size_t count);
28 void __iowrite64_copy(void __iomem *to, const void *from, size_t count);
29 
30 #ifdef CONFIG_MMU
31 int ioremap_page_range(unsigned long addr, unsigned long end,
32 		       phys_addr_t phys_addr, pgprot_t prot);
33 #else
ioremap_page_range(unsigned long addr,unsigned long end,phys_addr_t phys_addr,pgprot_t prot)34 static inline int ioremap_page_range(unsigned long addr, unsigned long end,
35 				     phys_addr_t phys_addr, pgprot_t prot)
36 {
37 	return 0;
38 }
39 #endif
40 
41 /*
42  * Managed iomap interface
43  */
44 #ifdef CONFIG_HAS_IOPORT
45 void __iomem * devm_ioport_map(struct device *dev, unsigned long port,
46 			       unsigned int nr);
47 void devm_ioport_unmap(struct device *dev, void __iomem *addr);
48 #else
devm_ioport_map(struct device * dev,unsigned long port,unsigned int nr)49 static inline void __iomem *devm_ioport_map(struct device *dev,
50 					     unsigned long port,
51 					     unsigned int nr)
52 {
53 	return NULL;
54 }
55 
devm_ioport_unmap(struct device * dev,void __iomem * addr)56 static inline void devm_ioport_unmap(struct device *dev, void __iomem *addr)
57 {
58 }
59 #endif
60 
61 void __iomem *devm_ioremap(struct device *dev, resource_size_t offset,
62 			    unsigned long size);
63 void __iomem *devm_ioremap_nocache(struct device *dev, resource_size_t offset,
64 				    unsigned long size);
65 void devm_iounmap(struct device *dev, void __iomem *addr);
66 int check_signature(const volatile void __iomem *io_addr,
67 			const unsigned char *signature, int length);
68 void devm_ioremap_release(struct device *dev, void *res);
69 
70 /*
71  * Some systems do not have legacy ISA devices.
72  * /dev/port is not a valid interface on these systems.
73  * So for those archs, <asm/io.h> should define the following symbol.
74  */
75 #ifndef arch_has_dev_port
76 #define arch_has_dev_port()     (1)
77 #endif
78 
79 #endif /* _LINUX_IO_H */
80