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6#ifndef _LINUX_IO_H
7#define _LINUX_IO_H
8
9#include <linux/types.h>
10#include <linux/init.h>
11#include <linux/bug.h>
12#include <linux/err.h>
13#include <asm/io.h>
14#include <asm/page.h>
15
16struct device;
17struct resource;
18
19__visible void __iowrite32_copy(void __iomem *to, const void *from, size_t count);
20void __ioread32_copy(void *to, const void __iomem *from, size_t count);
21void __iowrite64_copy(void __iomem *to, const void *from, size_t count);
22
23#ifdef CONFIG_MMU
24int ioremap_page_range(unsigned long addr, unsigned long end,
25 phys_addr_t phys_addr, pgprot_t prot);
26#else
27static inline int ioremap_page_range(unsigned long addr, unsigned long end,
28 phys_addr_t phys_addr, pgprot_t prot)
29{
30 return 0;
31}
32#endif
33
34
35
36
37#ifdef CONFIG_HAS_IOPORT_MAP
38void __iomem * devm_ioport_map(struct device *dev, unsigned long port,
39 unsigned int nr);
40void devm_ioport_unmap(struct device *dev, void __iomem *addr);
41#else
42static inline void __iomem *devm_ioport_map(struct device *dev,
43 unsigned long port,
44 unsigned int nr)
45{
46 return NULL;
47}
48
49static inline void devm_ioport_unmap(struct device *dev, void __iomem *addr)
50{
51}
52#endif
53
54#define IOMEM_ERR_PTR(err) (__force void __iomem *)ERR_PTR(err)
55
56void __iomem *devm_ioremap(struct device *dev, resource_size_t offset,
57 resource_size_t size);
58void __iomem *devm_ioremap_uc(struct device *dev, resource_size_t offset,
59 resource_size_t size);
60void __iomem *devm_ioremap_wc(struct device *dev, resource_size_t offset,
61 resource_size_t size);
62void __iomem *devm_ioremap_np(struct device *dev, resource_size_t offset,
63 resource_size_t size);
64void devm_iounmap(struct device *dev, void __iomem *addr);
65int check_signature(const volatile void __iomem *io_addr,
66 const unsigned char *signature, int length);
67void devm_ioremap_release(struct device *dev, void *res);
68
69void *devm_memremap(struct device *dev, resource_size_t offset,
70 size_t size, unsigned long flags);
71void devm_memunmap(struct device *dev, void *addr);
72
73#ifdef CONFIG_PCI
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83
84#ifndef pci_remap_cfgspace
85#define pci_remap_cfgspace pci_remap_cfgspace
86static inline void __iomem *pci_remap_cfgspace(phys_addr_t offset,
87 size_t size)
88{
89 return ioremap_np(offset, size) ?: ioremap(offset, size);
90}
91#endif
92#endif
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98
99#ifndef arch_has_dev_port
100#define arch_has_dev_port() (1)
101#endif
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112
113
114#ifndef arch_phys_wc_add
115static inline int __must_check arch_phys_wc_add(unsigned long base,
116 unsigned long size)
117{
118 return 0;
119}
120
121static inline void arch_phys_wc_del(int handle)
122{
123}
124
125#define arch_phys_wc_add arch_phys_wc_add
126#ifndef arch_phys_wc_index
127static inline int arch_phys_wc_index(int handle)
128{
129 return -1;
130}
131#define arch_phys_wc_index arch_phys_wc_index
132#endif
133#endif
134
135enum {
136
137 MEMREMAP_WB = 1 << 0,
138 MEMREMAP_WT = 1 << 1,
139 MEMREMAP_WC = 1 << 2,
140 MEMREMAP_ENC = 1 << 3,
141 MEMREMAP_DEC = 1 << 4,
142};
143
144void *memremap(resource_size_t offset, size_t size, unsigned long flags);
145void memunmap(void *addr);
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154
155
156#ifndef arch_io_reserve_memtype_wc
157static inline int arch_io_reserve_memtype_wc(resource_size_t base,
158 resource_size_t size)
159{
160 return 0;
161}
162
163static inline void arch_io_free_memtype_wc(resource_size_t base,
164 resource_size_t size)
165{
166}
167#endif
168
169#endif
170