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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
16
17
18struct 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
28
29#define IORESOURCE_BITS 0x000000ff
30
31#define IORESOURCE_TYPE_BITS 0x00001f00
32#define IORESOURCE_IO 0x00000100
33#define IORESOURCE_MEM 0x00000200
34#define IORESOURCE_REG 0x00000300
35#define IORESOURCE_IRQ 0x00000400
36#define IORESOURCE_DMA 0x00000800
37#define IORESOURCE_BUS 0x00001000
38
39#define IORESOURCE_PREFETCH 0x00002000
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
46#define IORESOURCE_STARTALIGN 0x00080000
47
48#define IORESOURCE_MEM_64 0x00100000
49#define IORESOURCE_WINDOW 0x00200000
50#define IORESOURCE_MUXED 0x00400000
51
52#define IORESOURCE_EXCLUSIVE 0x08000000
53#define IORESOURCE_DISABLED 0x10000000
54#define IORESOURCE_UNSET 0x20000000
55#define IORESOURCE_AUTO 0x40000000
56#define IORESOURCE_BUSY 0x80000000
57
58
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
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
83#define IORESOURCE_MEM_WRITEABLE (1<<0)
84#define IORESOURCE_MEM_CACHEABLE (1<<1)
85#define IORESOURCE_MEM_RANGELENGTH (1<<2)
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)
92#define IORESOURCE_MEM_EXPANSIONROM (1<<6)
93
94
95#define IORESOURCE_IO_16BIT_ADDR (1<<0)
96#define IORESOURCE_IO_FIXED (1<<1)
97
98
99#define IORESOURCE_ROM_ENABLE (1<<0)
100#define IORESOURCE_ROM_SHADOW (1<<1)
101#define IORESOURCE_ROM_COPY (1<<2)
102#define IORESOURCE_ROM_BIOS_COPY (1<<3)
103
104
105#define IORESOURCE_PCI_FIXED (1<<4)
106
107
108
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
138extern struct resource ioport_resource;
139extern struct resource iomem_resource;
140
141extern struct resource *request_resource_conflict(struct resource *root, struct resource *new);
142extern int request_resource(struct resource *root, struct resource *new);
143extern int release_resource(struct resource *new);
144void release_child_resources(struct resource *new);
145extern void reserve_region_with_split(struct resource *root,
146 resource_size_t start, resource_size_t end,
147 const char *name);
148extern struct resource *insert_resource_conflict(struct resource *parent, struct resource *new);
149extern int insert_resource(struct resource *parent, struct resource *new);
150extern void insert_resource_expand_to_fit(struct resource *root, struct resource *new);
151extern void arch_remove_reservations(struct resource *avail);
152extern 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);
160struct resource *lookup_resource(struct resource *root, resource_size_t start);
161int adjust_resource(struct resource *res, resource_size_t start,
162 resource_size_t size);
163resource_size_t resource_alignment(struct resource *res);
164static inline resource_size_t resource_size(const struct resource *res)
165{
166 return res->end - res->start + 1;
167}
168static inline unsigned long resource_type(const struct resource *res)
169{
170 return res->flags & IORESOURCE_TYPE_BITS;
171}
172
173static inline bool resource_contains(struct resource *r1, struct resource *r2)
174{
175 if (resource_type(r1) != resource_type(r2))
176 return false;
177 if (r1->flags & IORESOURCE_UNSET || r2->flags & IORESOURCE_UNSET)
178 return false;
179 return r1->start <= r2->start && r1->end >= r2->end;
180}
181
182
183
184#define request_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name), 0)
185#define request_muxed_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name), IORESOURCE_MUXED)
186#define __request_mem_region(start,n,name, excl) __request_region(&iomem_resource, (start), (n), (name), excl)
187#define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name), 0)
188#define request_mem_region_exclusive(start,n,name) \
189 __request_region(&iomem_resource, (start), (n), (name), IORESOURCE_EXCLUSIVE)
190#define rename_region(region, newname) do { (region)->name = (newname); } while (0)
191
192extern struct resource * __request_region(struct resource *,
193 resource_size_t start,
194 resource_size_t n,
195 const char *name, int flags);
196
197
198#define release_region(start,n) __release_region(&ioport_resource, (start), (n))
199#define check_mem_region(start,n) __check_region(&iomem_resource, (start), (n))
200#define release_mem_region(start,n) __release_region(&iomem_resource, (start), (n))
201
202extern int __check_region(struct resource *, resource_size_t, resource_size_t);
203extern void __release_region(struct resource *, resource_size_t,
204 resource_size_t);
205#ifdef CONFIG_MEMORY_HOTREMOVE
206extern int release_mem_region_adjustable(struct resource *, resource_size_t,
207 resource_size_t);
208#endif
209
210static inline int __deprecated check_region(resource_size_t s,
211 resource_size_t n)
212{
213 return __check_region(&ioport_resource, s, n);
214}
215
216
217struct device;
218
219extern int devm_request_resource(struct device *dev, struct resource *root,
220 struct resource *new);
221extern void devm_release_resource(struct device *dev, struct resource *new);
222
223#define devm_request_region(dev,start,n,name) \
224 __devm_request_region(dev, &ioport_resource, (start), (n), (name))
225#define devm_request_mem_region(dev,start,n,name) \
226 __devm_request_region(dev, &iomem_resource, (start), (n), (name))
227
228extern struct resource * __devm_request_region(struct device *dev,
229 struct resource *parent, resource_size_t start,
230 resource_size_t n, const char *name);
231
232#define devm_release_region(dev, start, n) \
233 __devm_release_region(dev, &ioport_resource, (start), (n))
234#define devm_release_mem_region(dev, start, n) \
235 __devm_release_region(dev, &iomem_resource, (start), (n))
236
237extern void __devm_release_region(struct device *dev, struct resource *parent,
238 resource_size_t start, resource_size_t n);
239extern int iomem_map_sanity_check(resource_size_t addr, unsigned long size);
240extern int iomem_is_exclusive(u64 addr);
241
242extern int
243walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages,
244 void *arg, int (*func)(unsigned long, unsigned long, void *));
245extern int
246walk_system_ram_res(u64 start, u64 end, void *arg,
247 int (*func)(u64, u64, void *));
248extern int
249walk_iomem_res(char *name, unsigned long flags, u64 start, u64 end, void *arg,
250 int (*func)(u64, u64, void *));
251
252
253static inline bool resource_overlaps(struct resource *r1, struct resource *r2)
254{
255 return (r1->start <= r2->end && r1->end >= r2->start);
256}
257
258
259#endif
260#endif
261