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 0x00000f00 /* Resource type */
38 #define IORESOURCE_IO 0x00000100
39 #define IORESOURCE_MEM 0x00000200
40 #define IORESOURCE_IRQ 0x00000400
41 #define IORESOURCE_DMA 0x00000800
43 #define IORESOURCE_PREFETCH 0x00001000 /* No side effects */
44 #define IORESOURCE_READONLY 0x00002000
45 #define IORESOURCE_CACHEABLE 0x00004000
46 #define IORESOURCE_RANGELENGTH 0x00008000
47 #define IORESOURCE_SHADOWABLE 0x00010000
49 #define IORESOURCE_SIZEALIGN 0x00020000 /* size indicates alignment */
50 #define IORESOURCE_STARTALIGN 0x00040000 /* start field is alignment */
52 #define IORESOURCE_DISABLED 0x10000000
53 #define IORESOURCE_UNSET 0x20000000
54 #define IORESOURCE_AUTO 0x40000000
55 #define IORESOURCE_BUSY 0x80000000 /* Driver has marked this resource busy */
57 /* PnP IRQ specific bits (IORESOURCE_BITS) */
58 #define IORESOURCE_IRQ_HIGHEDGE (1<<0)
59 #define IORESOURCE_IRQ_LOWEDGE (1<<1)
60 #define IORESOURCE_IRQ_HIGHLEVEL (1<<2)
61 #define IORESOURCE_IRQ_LOWLEVEL (1<<3)
62 #define IORESOURCE_IRQ_SHAREABLE (1<<4)
63 #define IORESOURCE_IRQ_OPTIONAL (1<<5)
65 /* PnP DMA specific bits (IORESOURCE_BITS) */
66 #define IORESOURCE_DMA_TYPE_MASK (3<<0)
67 #define IORESOURCE_DMA_8BIT (0<<0)
68 #define IORESOURCE_DMA_8AND16BIT (1<<0)
69 #define IORESOURCE_DMA_16BIT (2<<0)
71 #define IORESOURCE_DMA_MASTER (1<<2)
72 #define IORESOURCE_DMA_BYTE (1<<3)
73 #define IORESOURCE_DMA_WORD (1<<4)
75 #define IORESOURCE_DMA_SPEED_MASK (3<<6)
76 #define IORESOURCE_DMA_COMPATIBLE (0<<6)
77 #define IORESOURCE_DMA_TYPEA (1<<6)
78 #define IORESOURCE_DMA_TYPEB (2<<6)
79 #define IORESOURCE_DMA_TYPEF (3<<6)
81 /* PnP memory I/O specific bits (IORESOURCE_BITS) */
82 #define IORESOURCE_MEM_WRITEABLE (1<<0) /* dup: IORESOURCE_READONLY */
83 #define IORESOURCE_MEM_CACHEABLE (1<<1) /* dup: IORESOURCE_CACHEABLE */
84 #define IORESOURCE_MEM_RANGELENGTH (1<<2) /* dup: IORESOURCE_RANGELENGTH */
85 #define IORESOURCE_MEM_TYPE_MASK (3<<3)
86 #define IORESOURCE_MEM_8BIT (0<<3)
87 #define IORESOURCE_MEM_16BIT (1<<3)
88 #define IORESOURCE_MEM_8AND16BIT (2<<3)
89 #define IORESOURCE_MEM_32BIT (3<<3)
90 #define IORESOURCE_MEM_SHADOWABLE (1<<5) /* dup: IORESOURCE_SHADOWABLE */
91 #define IORESOURCE_MEM_EXPANSIONROM (1<<6)
93 /* PnP I/O specific bits (IORESOURCE_BITS) */
94 #define IORESOURCE_IO_16BIT_ADDR (1<<0)
95 #define IORESOURCE_IO_FIXED (1<<1)
97 /* PCI ROM control bits (IORESOURCE_BITS) */
98 #define IORESOURCE_ROM_ENABLE (1<<0) /* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */
99 #define IORESOURCE_ROM_SHADOW (1<<1) /* ROM is copy at C000:0 */
100 #define IORESOURCE_ROM_COPY (1<<2) /* ROM is alloc'd copy, resource field overlaid */
101 #define IORESOURCE_ROM_BIOS_COPY (1<<3) /* ROM is BIOS copy, resource field overlaid */
103 /* PCI control bits. Shares IORESOURCE_BITS with above PCI ROM. */
104 #define IORESOURCE_PCI_FIXED (1<<4) /* Do not move resource */
106 /* PC/ISA/whatever - the normal PC address spaces: IO and memory */
107 extern struct resource ioport_resource;
108 extern struct resource iomem_resource;
110 extern int request_resource(struct resource *root, struct resource *new);
111 extern int release_resource(struct resource *new);
112 extern void reserve_region_with_split(struct resource *root,
113 resource_size_t start, resource_size_t end,
115 extern int insert_resource(struct resource *parent, struct resource *new);
116 extern void insert_resource_expand_to_fit(struct resource *root, struct resource *new);
117 extern int allocate_resource(struct resource *root, struct resource *new,
118 resource_size_t size, resource_size_t min,
119 resource_size_t max, resource_size_t align,
120 void (*alignf)(void *, struct resource *,
121 resource_size_t, resource_size_t),
123 int adjust_resource(struct resource *res, resource_size_t start,
124 resource_size_t size);
125 resource_size_t resource_alignment(struct resource *res);
126 static inline resource_size_t resource_size(struct resource *res)
128 return res->end - res->start + 1;
130 static inline unsigned long resource_type(struct resource *res)
132 return res->flags & IORESOURCE_TYPE_BITS;
135 /* Convenience shorthand with allocation */
136 #define request_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name))
137 #define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name))
138 #define rename_region(region, newname) do { (region)->name = (newname); } while (0)
140 extern struct resource * __request_region(struct resource *,
141 resource_size_t start,
142 resource_size_t n, const char *name);
144 /* Compatibility cruft */
145 #define release_region(start,n) __release_region(&ioport_resource, (start), (n))
146 #define check_mem_region(start,n) __check_region(&iomem_resource, (start), (n))
147 #define release_mem_region(start,n) __release_region(&iomem_resource, (start), (n))
149 extern int __check_region(struct resource *, resource_size_t, resource_size_t);
150 extern void __release_region(struct resource *, resource_size_t,
153 static inline int __deprecated check_region(resource_size_t s,
156 return __check_region(&ioport_resource, s, n);
159 /* Wrappers for managed devices */
161 #define devm_request_region(dev,start,n,name) \
162 __devm_request_region(dev, &ioport_resource, (start), (n), (name))
163 #define devm_request_mem_region(dev,start,n,name) \
164 __devm_request_region(dev, &iomem_resource, (start), (n), (name))
166 extern struct resource * __devm_request_region(struct device *dev,
167 struct resource *parent, resource_size_t start,
168 resource_size_t n, const char *name);
170 #define devm_release_region(dev, start, n) \
171 __devm_release_region(dev, &ioport_resource, (start), (n))
172 #define devm_release_mem_region(dev, start, n) \
173 __devm_release_region(dev, &iomem_resource, (start), (n))
175 extern void __devm_release_region(struct device *dev, struct resource *parent,
176 resource_size_t start, resource_size_t n);
177 extern int iomem_map_sanity_check(resource_size_t addr, unsigned long size);
179 #endif /* __ASSEMBLY__ */
180 #endif /* _LINUX_IOPORT_H */