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c27a0d75 BS |
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 | ||
cb1055fb | 21 | #include <linux/types.h> |
d6472302 | 22 | #include <linux/init.h> |
41e94a85 CH |
23 | #include <linux/bug.h> |
24 | #include <linux/err.h> | |
c27a0d75 | 25 | #include <asm/io.h> |
74588d8b | 26 | #include <asm/page.h> |
c27a0d75 | 27 | |
7f253770 | 28 | struct device; |
41e94a85 | 29 | struct resource; |
7f253770 | 30 | |
d47d5c81 | 31 | __visible void __iowrite32_copy(void __iomem *to, const void *from, size_t count); |
22ae813b | 32 | void __iowrite64_copy(void __iomem *to, const void *from, size_t count); |
c27a0d75 | 33 | |
218f0aae | 34 | #ifdef CONFIG_MMU |
74588d8b | 35 | int ioremap_page_range(unsigned long addr, unsigned long end, |
ffa71f33 | 36 | phys_addr_t phys_addr, pgprot_t prot); |
218f0aae PM |
37 | #else |
38 | static inline int ioremap_page_range(unsigned long addr, unsigned long end, | |
ffa71f33 | 39 | phys_addr_t phys_addr, pgprot_t prot) |
218f0aae PM |
40 | { |
41 | return 0; | |
42 | } | |
43 | #endif | |
74588d8b | 44 | |
0ddab1d2 TK |
45 | #ifdef CONFIG_HAVE_ARCH_HUGE_VMAP |
46 | void __init ioremap_huge_init(void); | |
47 | int arch_ioremap_pud_supported(void); | |
48 | int arch_ioremap_pmd_supported(void); | |
49 | #else | |
50 | static inline void ioremap_huge_init(void) { } | |
51 | #endif | |
52 | ||
9ac7849e TH |
53 | /* |
54 | * Managed iomap interface | |
55 | */ | |
ce816fa8 | 56 | #ifdef CONFIG_HAS_IOPORT_MAP |
9ac7849e TH |
57 | void __iomem * devm_ioport_map(struct device *dev, unsigned long port, |
58 | unsigned int nr); | |
59 | void devm_ioport_unmap(struct device *dev, void __iomem *addr); | |
93da2879 RK |
60 | #else |
61 | static inline void __iomem *devm_ioport_map(struct device *dev, | |
62 | unsigned long port, | |
63 | unsigned int nr) | |
64 | { | |
65 | return NULL; | |
66 | } | |
67 | ||
68 | static inline void devm_ioport_unmap(struct device *dev, void __iomem *addr) | |
69 | { | |
70 | } | |
71 | #endif | |
9ac7849e | 72 | |
efd342fb MB |
73 | #define IOMEM_ERR_PTR(err) (__force void __iomem *)ERR_PTR(err) |
74 | ||
4f452e8a | 75 | void __iomem *devm_ioremap(struct device *dev, resource_size_t offset, |
5559b7bc | 76 | resource_size_t size); |
4f452e8a | 77 | void __iomem *devm_ioremap_nocache(struct device *dev, resource_size_t offset, |
5559b7bc | 78 | resource_size_t size); |
34644524 AK |
79 | void __iomem *devm_ioremap_wc(struct device *dev, resource_size_t offset, |
80 | resource_size_t size); | |
9ac7849e | 81 | void devm_iounmap(struct device *dev, void __iomem *addr); |
cc2ea416 AM |
82 | int check_signature(const volatile void __iomem *io_addr, |
83 | const unsigned char *signature, int length); | |
b41e5fff | 84 | void devm_ioremap_release(struct device *dev, void *res); |
e50190a8 | 85 | |
7d3dcf26 CH |
86 | void *devm_memremap(struct device *dev, resource_size_t offset, |
87 | size_t size, unsigned long flags); | |
88 | void devm_memunmap(struct device *dev, void *addr); | |
89 | ||
41e94a85 CH |
90 | void *__devm_memremap_pages(struct device *dev, struct resource *res); |
91 | ||
92 | #ifdef CONFIG_ZONE_DEVICE | |
93 | void *devm_memremap_pages(struct device *dev, struct resource *res); | |
94 | #else | |
95 | static inline void *devm_memremap_pages(struct device *dev, struct resource *res) | |
96 | { | |
97 | /* | |
98 | * Fail attempts to call devm_memremap_pages() without | |
99 | * ZONE_DEVICE support enabled, this requires callers to fall | |
100 | * back to plain devm_memremap() based on config | |
101 | */ | |
102 | WARN_ON_ONCE(1); | |
103 | return ERR_PTR(-ENXIO); | |
104 | } | |
105 | #endif | |
106 | ||
e1612de9 HM |
107 | /* |
108 | * Some systems do not have legacy ISA devices. | |
109 | * /dev/port is not a valid interface on these systems. | |
110 | * So for those archs, <asm/io.h> should define the following symbol. | |
111 | */ | |
112 | #ifndef arch_has_dev_port | |
113 | #define arch_has_dev_port() (1) | |
114 | #endif | |
115 | ||
d0d98eed AL |
116 | /* |
117 | * Some systems (x86 without PAT) have a somewhat reliable way to mark a | |
118 | * physical address range such that uncached mappings will actually | |
119 | * end up write-combining. This facility should be used in conjunction | |
120 | * with pgprot_writecombine, ioremap-wc, or set_memory_wc, since it has | |
121 | * no effect if the per-page mechanisms are functional. | |
122 | * (On x86 without PAT, these functions manipulate MTRRs.) | |
123 | * | |
124 | * arch_phys_del_wc(0) or arch_phys_del_wc(any error code) is guaranteed | |
125 | * to have no effect. | |
126 | */ | |
127 | #ifndef arch_phys_wc_add | |
128 | static inline int __must_check arch_phys_wc_add(unsigned long base, | |
129 | unsigned long size) | |
130 | { | |
131 | return 0; /* It worked (i.e. did nothing). */ | |
132 | } | |
133 | ||
134 | static inline void arch_phys_wc_del(int handle) | |
135 | { | |
136 | } | |
137 | ||
138 | #define arch_phys_wc_add arch_phys_wc_add | |
7d010fdf LR |
139 | #ifndef arch_phys_wc_index |
140 | static inline int arch_phys_wc_index(int handle) | |
141 | { | |
142 | return -1; | |
143 | } | |
144 | #define arch_phys_wc_index arch_phys_wc_index | |
145 | #endif | |
d0d98eed AL |
146 | #endif |
147 | ||
92281dee DW |
148 | enum { |
149 | /* See memremap() kernel-doc for usage description... */ | |
150 | MEMREMAP_WB = 1 << 0, | |
151 | MEMREMAP_WT = 1 << 1, | |
152 | }; | |
153 | ||
154 | void *memremap(resource_size_t offset, size_t size, unsigned long flags); | |
155 | void memunmap(void *addr); | |
156 | ||
c27a0d75 | 157 | #endif /* _LINUX_IO_H */ |