2 * ioport.h Definitions of routines for detecting, reserving and
3 * allocating system resources.
5 * Authors: Linus Torvalds
8 #ifndef _LINUX_IOPORT_H
9 #define _LINUX_IOPORT_H
12 #include <linux/compiler.h>
13 #include <linux/types.h>
15 * Resources are tree-like, allowing
19 resource_size_t start
;
23 struct resource
*parent
, *sibling
, *child
;
26 struct resource_list
{
27 struct resource_list
*next
;
33 * IO resources have these defined flags.
35 #define IORESOURCE_BITS 0x000000ff /* Bus-specific bits */
37 #define IORESOURCE_TYPE_BITS 0x00001f00 /* Resource type */
38 #define IORESOURCE_IO 0x00000100
39 #define IORESOURCE_MEM 0x00000200
40 #define IORESOURCE_IRQ 0x00000400
41 #define IORESOURCE_DMA 0x00000800
42 #define IORESOURCE_BUS 0x00001000
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
50 #define IORESOURCE_SIZEALIGN 0x00040000 /* size indicates alignment */
51 #define IORESOURCE_STARTALIGN 0x00080000 /* start field is alignment */
53 #define IORESOURCE_MEM_64 0x00100000
54 #define IORESOURCE_WINDOW 0x00200000 /* forwarded by bridge */
56 #define IORESOURCE_EXCLUSIVE 0x08000000 /* Userland may not map this resource */
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 */
62 /* PnP IRQ specific bits (IORESOURCE_BITS) */
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)
67 #define IORESOURCE_IRQ_SHAREABLE (1<<4)
68 #define IORESOURCE_IRQ_OPTIONAL (1<<5)
70 /* PnP DMA specific bits (IORESOURCE_BITS) */
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)
76 #define IORESOURCE_DMA_MASTER (1<<2)
77 #define IORESOURCE_DMA_BYTE (1<<3)
78 #define IORESOURCE_DMA_WORD (1<<4)
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)
86 /* PnP memory I/O specific bits (IORESOURCE_BITS) */
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)
98 /* PnP I/O specific bits (IORESOURCE_BITS) */
99 #define IORESOURCE_IO_16BIT_ADDR (1<<0)
100 #define IORESOURCE_IO_FIXED (1<<1)
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 */
106 #define IORESOURCE_ROM_BIOS_COPY (1<<3) /* ROM is BIOS copy, resource field overlaid */
108 /* PCI control bits. Shares IORESOURCE_BITS with above PCI ROM. */
109 #define IORESOURCE_PCI_FIXED (1<<4) /* Do not move resource */
111 /* PC/ISA/whatever - the normal PC address spaces: IO and memory */
112 extern struct resource ioport_resource
;
113 extern struct resource iomem_resource
;
115 extern struct resource
*request_resource_conflict(struct resource
*root
, struct resource
*new);
116 extern int request_resource(struct resource
*root
, struct resource
*new);
117 extern int release_resource(struct resource
*new);
118 void release_child_resources(struct resource
*new);
119 extern void reserve_region_with_split(struct resource
*root
,
120 resource_size_t start
, resource_size_t end
,
122 extern struct resource
*insert_resource_conflict(struct resource
*parent
, struct resource
*new);
123 extern int insert_resource(struct resource
*parent
, struct resource
*new);
124 extern void insert_resource_expand_to_fit(struct resource
*root
, struct resource
*new);
125 extern int allocate_resource(struct resource
*root
, struct resource
*new,
126 resource_size_t size
, resource_size_t min
,
127 resource_size_t max
, resource_size_t align
,
128 resource_size_t (*alignf
)(void *,
129 const struct resource
*,
133 int adjust_resource(struct resource
*res
, resource_size_t start
,
134 resource_size_t size
);
135 resource_size_t
resource_alignment(struct resource
*res
);
136 static inline resource_size_t
resource_size(const struct resource
*res
)
138 return res
->end
- res
->start
+ 1;
140 static inline unsigned long resource_type(const struct resource
*res
)
142 return res
->flags
& IORESOURCE_TYPE_BITS
;
145 /* Convenience shorthand with allocation */
146 #define request_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name), 0)
147 #define __request_mem_region(start,n,name, excl) __request_region(&iomem_resource, (start), (n), (name), excl)
148 #define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name), 0)
149 #define request_mem_region_exclusive(start,n,name) \
150 __request_region(&iomem_resource, (start), (n), (name), IORESOURCE_EXCLUSIVE)
151 #define rename_region(region, newname) do { (region)->name = (newname); } while (0)
153 extern struct resource
* __request_region(struct resource
*,
154 resource_size_t start
,
156 const char *name
, int flags
);
158 /* Compatibility cruft */
159 #define release_region(start,n) __release_region(&ioport_resource, (start), (n))
160 #define check_mem_region(start,n) __check_region(&iomem_resource, (start), (n))
161 #define release_mem_region(start,n) __release_region(&iomem_resource, (start), (n))
163 extern int __check_region(struct resource
*, resource_size_t
, resource_size_t
);
164 extern void __release_region(struct resource
*, resource_size_t
,
167 static inline int __deprecated
check_region(resource_size_t s
,
170 return __check_region(&ioport_resource
, s
, n
);
173 /* Wrappers for managed devices */
175 #define devm_request_region(dev,start,n,name) \
176 __devm_request_region(dev, &ioport_resource, (start), (n), (name))
177 #define devm_request_mem_region(dev,start,n,name) \
178 __devm_request_region(dev, &iomem_resource, (start), (n), (name))
180 extern struct resource
* __devm_request_region(struct device
*dev
,
181 struct resource
*parent
, resource_size_t start
,
182 resource_size_t n
, const char *name
);
184 #define devm_release_region(dev, start, n) \
185 __devm_release_region(dev, &ioport_resource, (start), (n))
186 #define devm_release_mem_region(dev, start, n) \
187 __devm_release_region(dev, &iomem_resource, (start), (n))
189 extern void __devm_release_region(struct device
*dev
, struct resource
*parent
,
190 resource_size_t start
, resource_size_t n
);
191 extern int iomem_map_sanity_check(resource_size_t addr
, unsigned long size
);
192 extern int iomem_is_exclusive(u64 addr
);
195 walk_system_ram_range(unsigned long start_pfn
, unsigned long nr_pages
,
196 void *arg
, int (*func
)(unsigned long, unsigned long, void *));
198 #endif /* __ASSEMBLY__ */
199 #endif /* _LINUX_IOPORT_H */
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