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18#ifndef _LINUX_IO_H
19#define _LINUX_IO_H
20
21#include <linux/types.h>
22#include <linux/init.h>
23#include <linux/bug.h>
24#include <linux/err.h>
25#include <asm/io.h>
26#include <asm/page.h>
27
28struct device;
29struct resource;
30
31__visible void __iowrite32_copy(void __iomem *to, const void *from, size_t count);
32void __ioread32_copy(void *to, const void __iomem *from, size_t count);
33void __iowrite64_copy(void __iomem *to, const void *from, size_t count);
34
35#ifdef CONFIG_MMU
36int ioremap_page_range(unsigned long addr, unsigned long end,
37 phys_addr_t phys_addr, pgprot_t prot);
38#else
39static inline int ioremap_page_range(unsigned long addr, unsigned long end,
40 phys_addr_t phys_addr, pgprot_t prot)
41{
42 return 0;
43}
44#endif
45
46#ifdef CONFIG_HAVE_ARCH_HUGE_VMAP
47void __init ioremap_huge_init(void);
48int arch_ioremap_pud_supported(void);
49int arch_ioremap_pmd_supported(void);
50#else
51static inline void ioremap_huge_init(void) { }
52#endif
53
54
55
56
57#ifdef CONFIG_HAS_IOPORT_MAP
58void __iomem * devm_ioport_map(struct device *dev, unsigned long port,
59 unsigned int nr);
60void devm_ioport_unmap(struct device *dev, void __iomem *addr);
61#else
62static inline void __iomem *devm_ioport_map(struct device *dev,
63 unsigned long port,
64 unsigned int nr)
65{
66 return NULL;
67}
68
69static inline void devm_ioport_unmap(struct device *dev, void __iomem *addr)
70{
71}
72#endif
73
74#define IOMEM_ERR_PTR(err) (__force void __iomem *)ERR_PTR(err)
75
76void __iomem *devm_ioremap(struct device *dev, resource_size_t offset,
77 resource_size_t size);
78void __iomem *devm_ioremap_nocache(struct device *dev, resource_size_t offset,
79 resource_size_t size);
80void __iomem *devm_ioremap_wc(struct device *dev, resource_size_t offset,
81 resource_size_t size);
82void devm_iounmap(struct device *dev, void __iomem *addr);
83int check_signature(const volatile void __iomem *io_addr,
84 const unsigned char *signature, int length);
85void devm_ioremap_release(struct device *dev, void *res);
86
87void *devm_memremap(struct device *dev, resource_size_t offset,
88 size_t size, unsigned long flags);
89void devm_memunmap(struct device *dev, void *addr);
90
91void *__devm_memremap_pages(struct device *dev, struct resource *res);
92
93#ifdef CONFIG_PCI
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103
104#ifndef pci_remap_cfgspace
105#define pci_remap_cfgspace pci_remap_cfgspace
106static inline void __iomem *pci_remap_cfgspace(phys_addr_t offset,
107 size_t size)
108{
109 return ioremap_nocache(offset, size);
110}
111#endif
112#endif
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118
119#ifndef arch_has_dev_port
120#define arch_has_dev_port() (1)
121#endif
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133
134#ifndef arch_phys_wc_add
135static inline int __must_check arch_phys_wc_add(unsigned long base,
136 unsigned long size)
137{
138 return 0;
139}
140
141static inline void arch_phys_wc_del(int handle)
142{
143}
144
145#define arch_phys_wc_add arch_phys_wc_add
146#ifndef arch_phys_wc_index
147static inline int arch_phys_wc_index(int handle)
148{
149 return -1;
150}
151#define arch_phys_wc_index arch_phys_wc_index
152#endif
153#endif
154
155enum {
156
157 MEMREMAP_WB = 1 << 0,
158 MEMREMAP_WT = 1 << 1,
159 MEMREMAP_WC = 1 << 2,
160};
161
162void *memremap(resource_size_t offset, size_t size, unsigned long flags);
163void memunmap(void *addr);
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173
174#ifndef arch_io_reserve_memtype_wc
175static inline int arch_io_reserve_memtype_wc(resource_size_t base,
176 resource_size_t size)
177{
178 return 0;
179}
180
181static inline void arch_io_free_memtype_wc(resource_size_t base,
182 resource_size_t size)
183{
184}
185#endif
186
187#endif
188