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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * ioport.h Definitions of routines for detecting, reserving and | |
3 | * allocating system resources. | |
4 | * | |
5 | * Authors: Linus Torvalds | |
6 | */ | |
7 | ||
8 | #ifndef _LINUX_IOPORT_H | |
9 | #define _LINUX_IOPORT_H | |
10 | ||
c9cce83d | 11 | #ifndef __ASSEMBLY__ |
1da177e4 | 12 | #include <linux/compiler.h> |
cf7c712c | 13 | #include <linux/types.h> |
1da177e4 LT |
14 | /* |
15 | * Resources are tree-like, allowing | |
16 | * nesting etc.. | |
17 | */ | |
18 | struct resource { | |
cf7c712c GKH |
19 | resource_size_t start; |
20 | resource_size_t end; | |
1da177e4 | 21 | const char *name; |
1da177e4 LT |
22 | unsigned long flags; |
23 | struct resource *parent, *sibling, *child; | |
24 | }; | |
25 | ||
26 | struct resource_list { | |
27 | struct resource_list *next; | |
28 | struct resource *res; | |
29 | struct pci_dev *dev; | |
30 | }; | |
31 | ||
32 | /* | |
33 | * IO resources have these defined flags. | |
34 | */ | |
35 | #define IORESOURCE_BITS 0x000000ff /* Bus-specific bits */ | |
36 | ||
cd7e9fcd | 37 | #define IORESOURCE_TYPE_BITS 0x00001f00 /* Resource type */ |
c9f66169 | 38 | #define IORESOURCE_IO 0x00000100 |
1da177e4 LT |
39 | #define IORESOURCE_MEM 0x00000200 |
40 | #define IORESOURCE_IRQ 0x00000400 | |
41 | #define IORESOURCE_DMA 0x00000800 | |
42 | ||
cd7e9fcd BH |
43 | #define IORESOURCE_PREFETCH 0x00002000 /* No side effects */ |
44 | #define IORESOURCE_READONLY 0x00004000 | |
45 | #define IORESOURCE_CACHEABLE 0x00008000 | |
46 | #define IORESOURCE_RANGELENGTH 0x00010000 | |
47 | #define IORESOURCE_SHADOWABLE 0x00020000 | |
88452565 | 48 | |
cd7e9fcd BH |
49 | #define IORESOURCE_SIZEALIGN 0x00040000 /* size indicates alignment */ |
50 | #define IORESOURCE_STARTALIGN 0x00080000 /* start field is alignment */ | |
1da177e4 | 51 | |
1f82de10 YL |
52 | #define IORESOURCE_MEM_64 0x00100000 |
53 | ||
e8de1481 | 54 | #define IORESOURCE_EXCLUSIVE 0x08000000 /* Userland may not map this resource */ |
1da177e4 LT |
55 | #define IORESOURCE_DISABLED 0x10000000 |
56 | #define IORESOURCE_UNSET 0x20000000 | |
57 | #define IORESOURCE_AUTO 0x40000000 | |
58 | #define IORESOURCE_BUSY 0x80000000 /* Driver has marked this resource busy */ | |
59 | ||
e9fe9e18 | 60 | /* PnP IRQ specific bits (IORESOURCE_BITS) */ |
1da177e4 LT |
61 | #define IORESOURCE_IRQ_HIGHEDGE (1<<0) |
62 | #define IORESOURCE_IRQ_LOWEDGE (1<<1) | |
63 | #define IORESOURCE_IRQ_HIGHLEVEL (1<<2) | |
64 | #define IORESOURCE_IRQ_LOWLEVEL (1<<3) | |
c32928c5 | 65 | #define IORESOURCE_IRQ_SHAREABLE (1<<4) |
d5ebde6e | 66 | #define IORESOURCE_IRQ_OPTIONAL (1<<5) |
1da177e4 | 67 | |
e9fe9e18 | 68 | /* PnP DMA specific bits (IORESOURCE_BITS) */ |
1da177e4 LT |
69 | #define IORESOURCE_DMA_TYPE_MASK (3<<0) |
70 | #define IORESOURCE_DMA_8BIT (0<<0) | |
71 | #define IORESOURCE_DMA_8AND16BIT (1<<0) | |
72 | #define IORESOURCE_DMA_16BIT (2<<0) | |
73 | ||
74 | #define IORESOURCE_DMA_MASTER (1<<2) | |
75 | #define IORESOURCE_DMA_BYTE (1<<3) | |
76 | #define IORESOURCE_DMA_WORD (1<<4) | |
77 | ||
78 | #define IORESOURCE_DMA_SPEED_MASK (3<<6) | |
79 | #define IORESOURCE_DMA_COMPATIBLE (0<<6) | |
80 | #define IORESOURCE_DMA_TYPEA (1<<6) | |
81 | #define IORESOURCE_DMA_TYPEB (2<<6) | |
82 | #define IORESOURCE_DMA_TYPEF (3<<6) | |
83 | ||
e9fe9e18 | 84 | /* PnP memory I/O specific bits (IORESOURCE_BITS) */ |
1da177e4 LT |
85 | #define IORESOURCE_MEM_WRITEABLE (1<<0) /* dup: IORESOURCE_READONLY */ |
86 | #define IORESOURCE_MEM_CACHEABLE (1<<1) /* dup: IORESOURCE_CACHEABLE */ | |
87 | #define IORESOURCE_MEM_RANGELENGTH (1<<2) /* dup: IORESOURCE_RANGELENGTH */ | |
88 | #define IORESOURCE_MEM_TYPE_MASK (3<<3) | |
89 | #define IORESOURCE_MEM_8BIT (0<<3) | |
90 | #define IORESOURCE_MEM_16BIT (1<<3) | |
91 | #define IORESOURCE_MEM_8AND16BIT (2<<3) | |
92 | #define IORESOURCE_MEM_32BIT (3<<3) | |
93 | #define IORESOURCE_MEM_SHADOWABLE (1<<5) /* dup: IORESOURCE_SHADOWABLE */ | |
94 | #define IORESOURCE_MEM_EXPANSIONROM (1<<6) | |
95 | ||
08c9f262 BH |
96 | /* PnP I/O specific bits (IORESOURCE_BITS) */ |
97 | #define IORESOURCE_IO_16BIT_ADDR (1<<0) | |
98 | #define IORESOURCE_IO_FIXED (1<<1) | |
99 | ||
1da177e4 LT |
100 | /* PCI ROM control bits (IORESOURCE_BITS) */ |
101 | #define IORESOURCE_ROM_ENABLE (1<<0) /* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */ | |
102 | #define IORESOURCE_ROM_SHADOW (1<<1) /* ROM is copy at C000:0 */ | |
103 | #define IORESOURCE_ROM_COPY (1<<2) /* ROM is alloc'd copy, resource field overlaid */ | |
a2302c68 | 104 | #define IORESOURCE_ROM_BIOS_COPY (1<<3) /* ROM is BIOS copy, resource field overlaid */ |
1da177e4 | 105 | |
fb0f2b40 RB |
106 | /* PCI control bits. Shares IORESOURCE_BITS with above PCI ROM. */ |
107 | #define IORESOURCE_PCI_FIXED (1<<4) /* Do not move resource */ | |
108 | ||
1da177e4 LT |
109 | /* PC/ISA/whatever - the normal PC address spaces: IO and memory */ |
110 | extern struct resource ioport_resource; | |
111 | extern struct resource iomem_resource; | |
112 | ||
113 | extern int request_resource(struct resource *root, struct resource *new); | |
1da177e4 | 114 | extern int release_resource(struct resource *new); |
5eeec0ec | 115 | void release_child_resources(struct resource *new); |
268364a0 YL |
116 | extern void reserve_region_with_split(struct resource *root, |
117 | resource_size_t start, resource_size_t end, | |
118 | const char *name); | |
cd6ef2ad | 119 | extern int insert_resource(struct resource *parent, struct resource *new); |
bef69ea0 | 120 | extern void insert_resource_expand_to_fit(struct resource *root, struct resource *new); |
1da177e4 | 121 | extern int allocate_resource(struct resource *root, struct resource *new, |
d75fc8bb GKH |
122 | resource_size_t size, resource_size_t min, |
123 | resource_size_t max, resource_size_t align, | |
b26b2d49 | 124 | resource_size_t (*alignf)(void *, |
3b7a17fc | 125 | const struct resource *, |
b26b2d49 DB |
126 | resource_size_t, |
127 | resource_size_t), | |
1da177e4 | 128 | void *alignf_data); |
d75fc8bb GKH |
129 | int adjust_resource(struct resource *res, resource_size_t start, |
130 | resource_size_t size); | |
88452565 | 131 | resource_size_t resource_alignment(struct resource *res); |
f65380c0 | 132 | static inline resource_size_t resource_size(const struct resource *res) |
1a4e564b MD |
133 | { |
134 | return res->end - res->start + 1; | |
135 | } | |
f65380c0 | 136 | static inline unsigned long resource_type(const struct resource *res) |
c9f66169 MD |
137 | { |
138 | return res->flags & IORESOURCE_TYPE_BITS; | |
139 | } | |
1da177e4 LT |
140 | |
141 | /* Convenience shorthand with allocation */ | |
e8de1481 AV |
142 | #define request_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name), 0) |
143 | #define __request_mem_region(start,n,name, excl) __request_region(&iomem_resource, (start), (n), (name), excl) | |
144 | #define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name), 0) | |
145 | #define request_mem_region_exclusive(start,n,name) \ | |
146 | __request_region(&iomem_resource, (start), (n), (name), IORESOURCE_EXCLUSIVE) | |
1da177e4 LT |
147 | #define rename_region(region, newname) do { (region)->name = (newname); } while (0) |
148 | ||
d75fc8bb GKH |
149 | extern struct resource * __request_region(struct resource *, |
150 | resource_size_t start, | |
6ae301e8 RD |
151 | resource_size_t n, |
152 | const char *name, int flags); | |
1da177e4 LT |
153 | |
154 | /* Compatibility cruft */ | |
155 | #define release_region(start,n) __release_region(&ioport_resource, (start), (n)) | |
156 | #define check_mem_region(start,n) __check_region(&iomem_resource, (start), (n)) | |
157 | #define release_mem_region(start,n) __release_region(&iomem_resource, (start), (n)) | |
158 | ||
d75fc8bb GKH |
159 | extern int __check_region(struct resource *, resource_size_t, resource_size_t); |
160 | extern void __release_region(struct resource *, resource_size_t, | |
161 | resource_size_t); | |
1da177e4 | 162 | |
d75fc8bb GKH |
163 | static inline int __deprecated check_region(resource_size_t s, |
164 | resource_size_t n) | |
1da177e4 LT |
165 | { |
166 | return __check_region(&ioport_resource, s, n); | |
167 | } | |
9ac7849e TH |
168 | |
169 | /* Wrappers for managed devices */ | |
170 | struct device; | |
171 | #define devm_request_region(dev,start,n,name) \ | |
172 | __devm_request_region(dev, &ioport_resource, (start), (n), (name)) | |
173 | #define devm_request_mem_region(dev,start,n,name) \ | |
174 | __devm_request_region(dev, &iomem_resource, (start), (n), (name)) | |
175 | ||
176 | extern struct resource * __devm_request_region(struct device *dev, | |
177 | struct resource *parent, resource_size_t start, | |
178 | resource_size_t n, const char *name); | |
179 | ||
dea420ce | 180 | #define devm_release_region(dev, start, n) \ |
9ac7849e | 181 | __devm_release_region(dev, &ioport_resource, (start), (n)) |
dea420ce | 182 | #define devm_release_mem_region(dev, start, n) \ |
9ac7849e TH |
183 | __devm_release_region(dev, &iomem_resource, (start), (n)) |
184 | ||
185 | extern void __devm_release_region(struct device *dev, struct resource *parent, | |
186 | resource_size_t start, resource_size_t n); | |
379daf62 | 187 | extern int iomem_map_sanity_check(resource_size_t addr, unsigned long size); |
e8de1481 | 188 | extern int iomem_is_exclusive(u64 addr); |
9ac7849e | 189 | |
908eedc6 KH |
190 | extern int |
191 | walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages, | |
192 | void *arg, int (*func)(unsigned long, unsigned long, void *)); | |
193 | ||
c9cce83d | 194 | #endif /* __ASSEMBLY__ */ |
1da177e4 | 195 | #endif /* _LINUX_IOPORT_H */ |