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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 | |
0f4050c7 | 42 | #define IORESOURCE_BUS 0x00001000 |
1da177e4 | 43 | |
cd7e9fcd BH |
44 | #define IORESOURCE_PREFETCH 0x00002000 /* No side effects */ |
45 | #define IORESOURCE_READONLY 0x00004000 | |
46 | #define IORESOURCE_CACHEABLE 0x00008000 | |
47 | #define IORESOURCE_RANGELENGTH 0x00010000 | |
48 | #define IORESOURCE_SHADOWABLE 0x00020000 | |
88452565 | 49 | |
cd7e9fcd BH |
50 | #define IORESOURCE_SIZEALIGN 0x00040000 /* size indicates alignment */ |
51 | #define IORESOURCE_STARTALIGN 0x00080000 /* start field is alignment */ | |
1da177e4 | 52 | |
1f82de10 | 53 | #define IORESOURCE_MEM_64 0x00100000 |
9d7cca04 | 54 | #define IORESOURCE_WINDOW 0x00200000 /* forwarded by bridge */ |
1f82de10 | 55 | |
e8de1481 | 56 | #define IORESOURCE_EXCLUSIVE 0x08000000 /* Userland may not map this resource */ |
1da177e4 LT |
57 | #define IORESOURCE_DISABLED 0x10000000 |
58 | #define IORESOURCE_UNSET 0x20000000 | |
59 | #define IORESOURCE_AUTO 0x40000000 | |
60 | #define IORESOURCE_BUSY 0x80000000 /* Driver has marked this resource busy */ | |
61 | ||
e9fe9e18 | 62 | /* PnP IRQ specific bits (IORESOURCE_BITS) */ |
1da177e4 LT |
63 | #define IORESOURCE_IRQ_HIGHEDGE (1<<0) |
64 | #define IORESOURCE_IRQ_LOWEDGE (1<<1) | |
65 | #define IORESOURCE_IRQ_HIGHLEVEL (1<<2) | |
66 | #define IORESOURCE_IRQ_LOWLEVEL (1<<3) | |
c32928c5 | 67 | #define IORESOURCE_IRQ_SHAREABLE (1<<4) |
d5ebde6e | 68 | #define IORESOURCE_IRQ_OPTIONAL (1<<5) |
1da177e4 | 69 | |
e9fe9e18 | 70 | /* PnP DMA specific bits (IORESOURCE_BITS) */ |
1da177e4 LT |
71 | #define IORESOURCE_DMA_TYPE_MASK (3<<0) |
72 | #define IORESOURCE_DMA_8BIT (0<<0) | |
73 | #define IORESOURCE_DMA_8AND16BIT (1<<0) | |
74 | #define IORESOURCE_DMA_16BIT (2<<0) | |
75 | ||
76 | #define IORESOURCE_DMA_MASTER (1<<2) | |
77 | #define IORESOURCE_DMA_BYTE (1<<3) | |
78 | #define IORESOURCE_DMA_WORD (1<<4) | |
79 | ||
80 | #define IORESOURCE_DMA_SPEED_MASK (3<<6) | |
81 | #define IORESOURCE_DMA_COMPATIBLE (0<<6) | |
82 | #define IORESOURCE_DMA_TYPEA (1<<6) | |
83 | #define IORESOURCE_DMA_TYPEB (2<<6) | |
84 | #define IORESOURCE_DMA_TYPEF (3<<6) | |
85 | ||
e9fe9e18 | 86 | /* PnP memory I/O specific bits (IORESOURCE_BITS) */ |
1da177e4 LT |
87 | #define IORESOURCE_MEM_WRITEABLE (1<<0) /* dup: IORESOURCE_READONLY */ |
88 | #define IORESOURCE_MEM_CACHEABLE (1<<1) /* dup: IORESOURCE_CACHEABLE */ | |
89 | #define IORESOURCE_MEM_RANGELENGTH (1<<2) /* dup: IORESOURCE_RANGELENGTH */ | |
90 | #define IORESOURCE_MEM_TYPE_MASK (3<<3) | |
91 | #define IORESOURCE_MEM_8BIT (0<<3) | |
92 | #define IORESOURCE_MEM_16BIT (1<<3) | |
93 | #define IORESOURCE_MEM_8AND16BIT (2<<3) | |
94 | #define IORESOURCE_MEM_32BIT (3<<3) | |
95 | #define IORESOURCE_MEM_SHADOWABLE (1<<5) /* dup: IORESOURCE_SHADOWABLE */ | |
96 | #define IORESOURCE_MEM_EXPANSIONROM (1<<6) | |
97 | ||
08c9f262 BH |
98 | /* PnP I/O specific bits (IORESOURCE_BITS) */ |
99 | #define IORESOURCE_IO_16BIT_ADDR (1<<0) | |
100 | #define IORESOURCE_IO_FIXED (1<<1) | |
101 | ||
1da177e4 LT |
102 | /* PCI ROM control bits (IORESOURCE_BITS) */ |
103 | #define IORESOURCE_ROM_ENABLE (1<<0) /* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */ | |
104 | #define IORESOURCE_ROM_SHADOW (1<<1) /* ROM is copy at C000:0 */ | |
105 | #define IORESOURCE_ROM_COPY (1<<2) /* ROM is alloc'd copy, resource field overlaid */ | |
a2302c68 | 106 | #define IORESOURCE_ROM_BIOS_COPY (1<<3) /* ROM is BIOS copy, resource field overlaid */ |
1da177e4 | 107 | |
fb0f2b40 RB |
108 | /* PCI control bits. Shares IORESOURCE_BITS with above PCI ROM. */ |
109 | #define IORESOURCE_PCI_FIXED (1<<4) /* Do not move resource */ | |
110 | ||
1da177e4 LT |
111 | /* PC/ISA/whatever - the normal PC address spaces: IO and memory */ |
112 | extern struct resource ioport_resource; | |
113 | extern struct resource iomem_resource; | |
114 | ||
115 | extern int request_resource(struct resource *root, struct resource *new); | |
1da177e4 | 116 | extern int release_resource(struct resource *new); |
5eeec0ec | 117 | void release_child_resources(struct resource *new); |
268364a0 YL |
118 | extern void reserve_region_with_split(struct resource *root, |
119 | resource_size_t start, resource_size_t end, | |
120 | const char *name); | |
cd6ef2ad | 121 | extern int insert_resource(struct resource *parent, struct resource *new); |
bef69ea0 | 122 | extern void insert_resource_expand_to_fit(struct resource *root, struct resource *new); |
1da177e4 | 123 | extern int allocate_resource(struct resource *root, struct resource *new, |
d75fc8bb GKH |
124 | resource_size_t size, resource_size_t min, |
125 | resource_size_t max, resource_size_t align, | |
b26b2d49 | 126 | resource_size_t (*alignf)(void *, |
3b7a17fc | 127 | const struct resource *, |
b26b2d49 DB |
128 | resource_size_t, |
129 | resource_size_t), | |
1da177e4 | 130 | void *alignf_data); |
d75fc8bb GKH |
131 | int adjust_resource(struct resource *res, resource_size_t start, |
132 | resource_size_t size); | |
88452565 | 133 | resource_size_t resource_alignment(struct resource *res); |
f65380c0 | 134 | static inline resource_size_t resource_size(const struct resource *res) |
1a4e564b MD |
135 | { |
136 | return res->end - res->start + 1; | |
137 | } | |
f65380c0 | 138 | static inline unsigned long resource_type(const struct resource *res) |
c9f66169 MD |
139 | { |
140 | return res->flags & IORESOURCE_TYPE_BITS; | |
141 | } | |
1da177e4 LT |
142 | |
143 | /* Convenience shorthand with allocation */ | |
e8de1481 AV |
144 | #define request_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name), 0) |
145 | #define __request_mem_region(start,n,name, excl) __request_region(&iomem_resource, (start), (n), (name), excl) | |
146 | #define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name), 0) | |
147 | #define request_mem_region_exclusive(start,n,name) \ | |
148 | __request_region(&iomem_resource, (start), (n), (name), IORESOURCE_EXCLUSIVE) | |
1da177e4 LT |
149 | #define rename_region(region, newname) do { (region)->name = (newname); } while (0) |
150 | ||
d75fc8bb GKH |
151 | extern struct resource * __request_region(struct resource *, |
152 | resource_size_t start, | |
6ae301e8 RD |
153 | resource_size_t n, |
154 | const char *name, int flags); | |
1da177e4 LT |
155 | |
156 | /* Compatibility cruft */ | |
157 | #define release_region(start,n) __release_region(&ioport_resource, (start), (n)) | |
158 | #define check_mem_region(start,n) __check_region(&iomem_resource, (start), (n)) | |
159 | #define release_mem_region(start,n) __release_region(&iomem_resource, (start), (n)) | |
160 | ||
d75fc8bb GKH |
161 | extern int __check_region(struct resource *, resource_size_t, resource_size_t); |
162 | extern void __release_region(struct resource *, resource_size_t, | |
163 | resource_size_t); | |
1da177e4 | 164 | |
d75fc8bb GKH |
165 | static inline int __deprecated check_region(resource_size_t s, |
166 | resource_size_t n) | |
1da177e4 LT |
167 | { |
168 | return __check_region(&ioport_resource, s, n); | |
169 | } | |
9ac7849e TH |
170 | |
171 | /* Wrappers for managed devices */ | |
172 | struct device; | |
173 | #define devm_request_region(dev,start,n,name) \ | |
174 | __devm_request_region(dev, &ioport_resource, (start), (n), (name)) | |
175 | #define devm_request_mem_region(dev,start,n,name) \ | |
176 | __devm_request_region(dev, &iomem_resource, (start), (n), (name)) | |
177 | ||
178 | extern struct resource * __devm_request_region(struct device *dev, | |
179 | struct resource *parent, resource_size_t start, | |
180 | resource_size_t n, const char *name); | |
181 | ||
dea420ce | 182 | #define devm_release_region(dev, start, n) \ |
9ac7849e | 183 | __devm_release_region(dev, &ioport_resource, (start), (n)) |
dea420ce | 184 | #define devm_release_mem_region(dev, start, n) \ |
9ac7849e TH |
185 | __devm_release_region(dev, &iomem_resource, (start), (n)) |
186 | ||
187 | extern void __devm_release_region(struct device *dev, struct resource *parent, | |
188 | resource_size_t start, resource_size_t n); | |
379daf62 | 189 | extern int iomem_map_sanity_check(resource_size_t addr, unsigned long size); |
e8de1481 | 190 | extern int iomem_is_exclusive(u64 addr); |
9ac7849e | 191 | |
908eedc6 KH |
192 | extern int |
193 | walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages, | |
194 | void *arg, int (*func)(unsigned long, unsigned long, void *)); | |
195 | ||
c9cce83d | 196 | #endif /* __ASSEMBLY__ */ |
1da177e4 | 197 | #endif /* _LINUX_IOPORT_H */ |