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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> |
c27a0d75 | 23 | #include <asm/io.h> |
74588d8b | 24 | #include <asm/page.h> |
c27a0d75 | 25 | |
7f253770 AM |
26 | struct device; |
27 | ||
d47d5c81 | 28 | __visible void __iowrite32_copy(void __iomem *to, const void *from, size_t count); |
22ae813b | 29 | void __iowrite64_copy(void __iomem *to, const void *from, size_t count); |
c27a0d75 | 30 | |
218f0aae | 31 | #ifdef CONFIG_MMU |
74588d8b | 32 | int ioremap_page_range(unsigned long addr, unsigned long end, |
ffa71f33 | 33 | phys_addr_t phys_addr, pgprot_t prot); |
218f0aae PM |
34 | #else |
35 | static inline int ioremap_page_range(unsigned long addr, unsigned long end, | |
ffa71f33 | 36 | phys_addr_t phys_addr, pgprot_t prot) |
218f0aae PM |
37 | { |
38 | return 0; | |
39 | } | |
40 | #endif | |
74588d8b | 41 | |
0ddab1d2 TK |
42 | #ifdef CONFIG_HAVE_ARCH_HUGE_VMAP |
43 | void __init ioremap_huge_init(void); | |
44 | int arch_ioremap_pud_supported(void); | |
45 | int arch_ioremap_pmd_supported(void); | |
46 | #else | |
47 | static inline void ioremap_huge_init(void) { } | |
48 | #endif | |
49 | ||
9ac7849e TH |
50 | /* |
51 | * Managed iomap interface | |
52 | */ | |
ce816fa8 | 53 | #ifdef CONFIG_HAS_IOPORT_MAP |
9ac7849e TH |
54 | void __iomem * devm_ioport_map(struct device *dev, unsigned long port, |
55 | unsigned int nr); | |
56 | void devm_ioport_unmap(struct device *dev, void __iomem *addr); | |
93da2879 RK |
57 | #else |
58 | static inline void __iomem *devm_ioport_map(struct device *dev, | |
59 | unsigned long port, | |
60 | unsigned int nr) | |
61 | { | |
62 | return NULL; | |
63 | } | |
64 | ||
65 | static inline void devm_ioport_unmap(struct device *dev, void __iomem *addr) | |
66 | { | |
67 | } | |
68 | #endif | |
9ac7849e | 69 | |
efd342fb MB |
70 | #define IOMEM_ERR_PTR(err) (__force void __iomem *)ERR_PTR(err) |
71 | ||
4f452e8a | 72 | void __iomem *devm_ioremap(struct device *dev, resource_size_t offset, |
5559b7bc | 73 | resource_size_t size); |
4f452e8a | 74 | void __iomem *devm_ioremap_nocache(struct device *dev, resource_size_t offset, |
5559b7bc | 75 | resource_size_t size); |
34644524 AK |
76 | void __iomem *devm_ioremap_wc(struct device *dev, resource_size_t offset, |
77 | resource_size_t size); | |
9ac7849e | 78 | void devm_iounmap(struct device *dev, void __iomem *addr); |
cc2ea416 AM |
79 | int check_signature(const volatile void __iomem *io_addr, |
80 | const unsigned char *signature, int length); | |
b41e5fff | 81 | void devm_ioremap_release(struct device *dev, void *res); |
e50190a8 | 82 | |
e1612de9 HM |
83 | /* |
84 | * Some systems do not have legacy ISA devices. | |
85 | * /dev/port is not a valid interface on these systems. | |
86 | * So for those archs, <asm/io.h> should define the following symbol. | |
87 | */ | |
88 | #ifndef arch_has_dev_port | |
89 | #define arch_has_dev_port() (1) | |
90 | #endif | |
91 | ||
d0d98eed AL |
92 | /* |
93 | * Some systems (x86 without PAT) have a somewhat reliable way to mark a | |
94 | * physical address range such that uncached mappings will actually | |
95 | * end up write-combining. This facility should be used in conjunction | |
96 | * with pgprot_writecombine, ioremap-wc, or set_memory_wc, since it has | |
97 | * no effect if the per-page mechanisms are functional. | |
98 | * (On x86 without PAT, these functions manipulate MTRRs.) | |
99 | * | |
100 | * arch_phys_del_wc(0) or arch_phys_del_wc(any error code) is guaranteed | |
101 | * to have no effect. | |
102 | */ | |
103 | #ifndef arch_phys_wc_add | |
104 | static inline int __must_check arch_phys_wc_add(unsigned long base, | |
105 | unsigned long size) | |
106 | { | |
107 | return 0; /* It worked (i.e. did nothing). */ | |
108 | } | |
109 | ||
110 | static inline void arch_phys_wc_del(int handle) | |
111 | { | |
112 | } | |
113 | ||
114 | #define arch_phys_wc_add arch_phys_wc_add | |
7d010fdf LR |
115 | #ifndef arch_phys_wc_index |
116 | static inline int arch_phys_wc_index(int handle) | |
117 | { | |
118 | return -1; | |
119 | } | |
120 | #define arch_phys_wc_index arch_phys_wc_index | |
121 | #endif | |
d0d98eed AL |
122 | #endif |
123 | ||
c27a0d75 | 124 | #endif /* _LINUX_IO_H */ |