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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 | |
11 | #ifndef __ASSEMBLY__ |
12 | #include <linux/compiler.h> |
13 | #include <linux/types.h> |
14 | /* |
15 | * Resources are tree-like, allowing |
16 | * nesting etc.. |
17 | */ |
18 | struct resource { |
19 | resource_size_t start; |
20 | resource_size_t end; |
21 | const char *name; |
22 | unsigned long flags; |
23 | struct resource *parent, *sibling, *child; |
24 | }; |
25 | |
26 | /* |
27 | * IO resources have these defined flags. |
28 | */ |
29 | #define IORESOURCE_BITS 0x000000ff /* Bus-specific bits */ |
30 | |
31 | #define IORESOURCE_TYPE_BITS 0x00001f00 /* Resource type */ |
32 | #define IORESOURCE_IO 0x00000100 /* PCI/ISA I/O ports */ |
33 | #define IORESOURCE_MEM 0x00000200 |
34 | #define IORESOURCE_REG 0x00000300 /* Register offsets */ |
35 | #define IORESOURCE_IRQ 0x00000400 |
36 | #define IORESOURCE_DMA 0x00000800 |
37 | #define IORESOURCE_BUS 0x00001000 |
38 | |
39 | #define IORESOURCE_PREFETCH 0x00002000 /* No side effects */ |
40 | #define IORESOURCE_READONLY 0x00004000 |
41 | #define IORESOURCE_CACHEABLE 0x00008000 |
42 | #define IORESOURCE_RANGELENGTH 0x00010000 |
43 | #define IORESOURCE_SHADOWABLE 0x00020000 |
44 | |
45 | #define IORESOURCE_SIZEALIGN 0x00040000 /* size indicates alignment */ |
46 | #define IORESOURCE_STARTALIGN 0x00080000 /* start field is alignment */ |
47 | |
48 | #define IORESOURCE_MEM_64 0x00100000 |
49 | #define IORESOURCE_WINDOW 0x00200000 /* forwarded by bridge */ |
50 | #define IORESOURCE_MUXED 0x00400000 /* Resource is software muxed */ |
51 | |
52 | #define IORESOURCE_EXCLUSIVE 0x08000000 /* Userland may not map this resource */ |
53 | #define IORESOURCE_DISABLED 0x10000000 |
54 | #define IORESOURCE_UNSET 0x20000000 |
55 | #define IORESOURCE_AUTO 0x40000000 |
56 | #define IORESOURCE_BUSY 0x80000000 /* Driver has marked this resource busy */ |
57 | |
58 | /* PnP IRQ specific bits (IORESOURCE_BITS) */ |
59 | #define IORESOURCE_IRQ_HIGHEDGE (1<<0) |
60 | #define IORESOURCE_IRQ_LOWEDGE (1<<1) |
61 | #define IORESOURCE_IRQ_HIGHLEVEL (1<<2) |
62 | #define IORESOURCE_IRQ_LOWLEVEL (1<<3) |
63 | #define IORESOURCE_IRQ_SHAREABLE (1<<4) |
64 | #define IORESOURCE_IRQ_OPTIONAL (1<<5) |
65 | |
66 | /* PnP DMA specific bits (IORESOURCE_BITS) */ |
67 | #define IORESOURCE_DMA_TYPE_MASK (3<<0) |
68 | #define IORESOURCE_DMA_8BIT (0<<0) |
69 | #define IORESOURCE_DMA_8AND16BIT (1<<0) |
70 | #define IORESOURCE_DMA_16BIT (2<<0) |
71 | |
72 | #define IORESOURCE_DMA_MASTER (1<<2) |
73 | #define IORESOURCE_DMA_BYTE (1<<3) |
74 | #define IORESOURCE_DMA_WORD (1<<4) |
75 | |
76 | #define IORESOURCE_DMA_SPEED_MASK (3<<6) |
77 | #define IORESOURCE_DMA_COMPATIBLE (0<<6) |
78 | #define IORESOURCE_DMA_TYPEA (1<<6) |
79 | #define IORESOURCE_DMA_TYPEB (2<<6) |
80 | #define IORESOURCE_DMA_TYPEF (3<<6) |
81 | |
82 | /* PnP memory I/O specific bits (IORESOURCE_BITS) */ |
83 | #define IORESOURCE_MEM_WRITEABLE (1<<0) /* dup: IORESOURCE_READONLY */ |
84 | #define IORESOURCE_MEM_CACHEABLE (1<<1) /* dup: IORESOURCE_CACHEABLE */ |
85 | #define IORESOURCE_MEM_RANGELENGTH (1<<2) /* dup: IORESOURCE_RANGELENGTH */ |
86 | #define IORESOURCE_MEM_TYPE_MASK (3<<3) |
87 | #define IORESOURCE_MEM_8BIT (0<<3) |
88 | #define IORESOURCE_MEM_16BIT (1<<3) |
89 | #define IORESOURCE_MEM_8AND16BIT (2<<3) |
90 | #define IORESOURCE_MEM_32BIT (3<<3) |
91 | #define IORESOURCE_MEM_SHADOWABLE (1<<5) /* dup: IORESOURCE_SHADOWABLE */ |
92 | #define IORESOURCE_MEM_EXPANSIONROM (1<<6) |
93 | |
94 | /* PnP I/O specific bits (IORESOURCE_BITS) */ |
95 | #define IORESOURCE_IO_16BIT_ADDR (1<<0) |
96 | #define IORESOURCE_IO_FIXED (1<<1) |
97 | |
98 | /* PCI ROM control bits (IORESOURCE_BITS) */ |
99 | #define IORESOURCE_ROM_ENABLE (1<<0) /* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */ |
100 | #define IORESOURCE_ROM_SHADOW (1<<1) /* ROM is copy at C000:0 */ |
101 | #define IORESOURCE_ROM_COPY (1<<2) /* ROM is alloc'd copy, resource field overlaid */ |
102 | #define IORESOURCE_ROM_BIOS_COPY (1<<3) /* ROM is BIOS copy, resource field overlaid */ |
103 | |
104 | /* PCI control bits. Shares IORESOURCE_BITS with above PCI ROM. */ |
105 | #define IORESOURCE_PCI_FIXED (1<<4) /* Do not move resource */ |
106 | |
107 | |
108 | /* helpers to define resources */ |
109 | #define DEFINE_RES_NAMED(_start, _size, _name, _flags) \ |
110 | { \ |
111 | .start = (_start), \ |
112 | .end = (_start) + (_size) - 1, \ |
113 | .name = (_name), \ |
114 | .flags = (_flags), \ |
115 | } |
116 | |
117 | #define DEFINE_RES_IO_NAMED(_start, _size, _name) \ |
118 | DEFINE_RES_NAMED((_start), (_size), (_name), IORESOURCE_IO) |
119 | #define DEFINE_RES_IO(_start, _size) \ |
120 | DEFINE_RES_IO_NAMED((_start), (_size), NULL) |
121 | |
122 | #define DEFINE_RES_MEM_NAMED(_start, _size, _name) \ |
123 | DEFINE_RES_NAMED((_start), (_size), (_name), IORESOURCE_MEM) |
124 | #define DEFINE_RES_MEM(_start, _size) \ |
125 | DEFINE_RES_MEM_NAMED((_start), (_size), NULL) |
126 | |
127 | #define DEFINE_RES_IRQ_NAMED(_irq, _name) \ |
128 | DEFINE_RES_NAMED((_irq), 1, (_name), IORESOURCE_IRQ) |
129 | #define DEFINE_RES_IRQ(_irq) \ |
130 | DEFINE_RES_IRQ_NAMED((_irq), NULL) |
131 | |
132 | #define DEFINE_RES_DMA_NAMED(_dma, _name) \ |
133 | DEFINE_RES_NAMED((_dma), 1, (_name), IORESOURCE_DMA) |
134 | #define DEFINE_RES_DMA(_dma) \ |
135 | DEFINE_RES_DMA_NAMED((_dma), NULL) |
136 | |
137 | /* PC/ISA/whatever - the normal PC address spaces: IO and memory */ |
138 | extern struct resource ioport_resource; |
139 | extern struct resource iomem_resource; |
140 | |
141 | extern struct resource *request_resource_conflict(struct resource *root, struct resource *new); |
142 | extern int request_resource(struct resource *root, struct resource *new); |
143 | extern int release_resource(struct resource *new); |
144 | void release_child_resources(struct resource *new); |
145 | extern void reserve_region_with_split(struct resource *root, |
146 | resource_size_t start, resource_size_t end, |
147 | const char *name); |
148 | extern struct resource *insert_resource_conflict(struct resource *parent, struct resource *new); |
149 | extern int insert_resource(struct resource *parent, struct resource *new); |
150 | extern void insert_resource_expand_to_fit(struct resource *root, struct resource *new); |
151 | extern void arch_remove_reservations(struct resource *avail); |
152 | extern int allocate_resource(struct resource *root, struct resource *new, |
153 | resource_size_t size, resource_size_t min, |
154 | resource_size_t max, resource_size_t align, |
155 | resource_size_t (*alignf)(void *, |
156 | const struct resource *, |
157 | resource_size_t, |
158 | resource_size_t), |
159 | void *alignf_data); |
160 | struct resource *lookup_resource(struct resource *root, resource_size_t start); |
161 | int adjust_resource(struct resource *res, resource_size_t start, |
162 | resource_size_t size); |
163 | resource_size_t resource_alignment(struct resource *res); |
164 | static inline resource_size_t resource_size(const struct resource *res) |
165 | { |
166 | return res->end - res->start + 1; |
167 | } |
168 | static inline unsigned long resource_type(const struct resource *res) |
169 | { |
170 | return res->flags & IORESOURCE_TYPE_BITS; |
171 | } |
172 | |
173 | /* Convenience shorthand with allocation */ |
174 | #define request_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name), 0) |
175 | #define request_muxed_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name), IORESOURCE_MUXED) |
176 | #define __request_mem_region(start,n,name, excl) __request_region(&iomem_resource, (start), (n), (name), excl) |
177 | #define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name), 0) |
178 | #define request_mem_region_exclusive(start,n,name) \ |
179 | __request_region(&iomem_resource, (start), (n), (name), IORESOURCE_EXCLUSIVE) |
180 | #define rename_region(region, newname) do { (region)->name = (newname); } while (0) |
181 | |
182 | extern struct resource * __request_region(struct resource *, |
183 | resource_size_t start, |
184 | resource_size_t n, |
185 | const char *name, int flags); |
186 | |
187 | /* Compatibility cruft */ |
188 | #define release_region(start,n) __release_region(&ioport_resource, (start), (n)) |
189 | #define check_mem_region(start,n) __check_region(&iomem_resource, (start), (n)) |
190 | #define release_mem_region(start,n) __release_region(&iomem_resource, (start), (n)) |
191 | |
192 | extern int __check_region(struct resource *, resource_size_t, resource_size_t); |
193 | extern void __release_region(struct resource *, resource_size_t, |
194 | resource_size_t); |
195 | |
196 | static inline int __deprecated check_region(resource_size_t s, |
197 | resource_size_t n) |
198 | { |
199 | return __check_region(&ioport_resource, s, n); |
200 | } |
201 | |
202 | /* Wrappers for managed devices */ |
203 | struct device; |
204 | #define devm_request_region(dev,start,n,name) \ |
205 | __devm_request_region(dev, &ioport_resource, (start), (n), (name)) |
206 | #define devm_request_mem_region(dev,start,n,name) \ |
207 | __devm_request_region(dev, &iomem_resource, (start), (n), (name)) |
208 | |
209 | extern struct resource * __devm_request_region(struct device *dev, |
210 | struct resource *parent, resource_size_t start, |
211 | resource_size_t n, const char *name); |
212 | |
213 | #define devm_release_region(dev, start, n) \ |
214 | __devm_release_region(dev, &ioport_resource, (start), (n)) |
215 | #define devm_release_mem_region(dev, start, n) \ |
216 | __devm_release_region(dev, &iomem_resource, (start), (n)) |
217 | |
218 | extern void __devm_release_region(struct device *dev, struct resource *parent, |
219 | resource_size_t start, resource_size_t n); |
220 | extern int iomem_map_sanity_check(resource_size_t addr, unsigned long size); |
221 | extern int iomem_is_exclusive(u64 addr); |
222 | |
223 | extern int |
224 | walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages, |
225 | void *arg, int (*func)(unsigned long, unsigned long, void *)); |
226 | |
227 | /* True if any part of r1 overlaps r2 */ |
228 | static inline bool resource_overlaps(struct resource *r1, struct resource *r2) |
229 | { |
230 | return (r1->start <= r2->end && r1->end >= r2->start); |
231 | } |
232 | |
233 | |
234 | #endif /* __ASSEMBLY__ */ |
235 | #endif /* _LINUX_IOPORT_H */ |
236 |
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