Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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 */
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
26struct 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
37#define IORESOURCE_IO 0x00000100 /* Resource type */
38#define IORESOURCE_MEM 0x00000200
39#define IORESOURCE_IRQ 0x00000400
40#define IORESOURCE_DMA 0x00000800
41
42#define IORESOURCE_PREFETCH 0x00001000 /* No side effects */
43#define IORESOURCE_READONLY 0x00002000
44#define IORESOURCE_CACHEABLE 0x00004000
45#define IORESOURCE_RANGELENGTH 0x00008000
46#define IORESOURCE_SHADOWABLE 0x00010000
47#define IORESOURCE_BUS_HAS_VGA 0x00080000
48
49#define IORESOURCE_DISABLED 0x10000000
50#define IORESOURCE_UNSET 0x20000000
51#define IORESOURCE_AUTO 0x40000000
52#define IORESOURCE_BUSY 0x80000000 /* Driver has marked this resource busy */
53
54/* ISA PnP IRQ specific bits (IORESOURCE_BITS) */
55#define IORESOURCE_IRQ_HIGHEDGE (1<<0)
56#define IORESOURCE_IRQ_LOWEDGE (1<<1)
57#define IORESOURCE_IRQ_HIGHLEVEL (1<<2)
58#define IORESOURCE_IRQ_LOWLEVEL (1<<3)
59#define IORESOURCE_IRQ_SHAREABLE (1<<4)
60
61/* ISA PnP DMA specific bits (IORESOURCE_BITS) */
62#define IORESOURCE_DMA_TYPE_MASK (3<<0)
63#define IORESOURCE_DMA_8BIT (0<<0)
64#define IORESOURCE_DMA_8AND16BIT (1<<0)
65#define IORESOURCE_DMA_16BIT (2<<0)
66
67#define IORESOURCE_DMA_MASTER (1<<2)
68#define IORESOURCE_DMA_BYTE (1<<3)
69#define IORESOURCE_DMA_WORD (1<<4)
70
71#define IORESOURCE_DMA_SPEED_MASK (3<<6)
72#define IORESOURCE_DMA_COMPATIBLE (0<<6)
73#define IORESOURCE_DMA_TYPEA (1<<6)
74#define IORESOURCE_DMA_TYPEB (2<<6)
75#define IORESOURCE_DMA_TYPEF (3<<6)
76
77/* ISA PnP memory I/O specific bits (IORESOURCE_BITS) */
78#define IORESOURCE_MEM_WRITEABLE (1<<0) /* dup: IORESOURCE_READONLY */
79#define IORESOURCE_MEM_CACHEABLE (1<<1) /* dup: IORESOURCE_CACHEABLE */
80#define IORESOURCE_MEM_RANGELENGTH (1<<2) /* dup: IORESOURCE_RANGELENGTH */
81#define IORESOURCE_MEM_TYPE_MASK (3<<3)
82#define IORESOURCE_MEM_8BIT (0<<3)
83#define IORESOURCE_MEM_16BIT (1<<3)
84#define IORESOURCE_MEM_8AND16BIT (2<<3)
85#define IORESOURCE_MEM_32BIT (3<<3)
86#define IORESOURCE_MEM_SHADOWABLE (1<<5) /* dup: IORESOURCE_SHADOWABLE */
87#define IORESOURCE_MEM_EXPANSIONROM (1<<6)
88
89/* PCI ROM control bits (IORESOURCE_BITS) */
90#define IORESOURCE_ROM_ENABLE (1<<0) /* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */
91#define IORESOURCE_ROM_SHADOW (1<<1) /* ROM is copy at C000:0 */
92#define IORESOURCE_ROM_COPY (1<<2) /* ROM is alloc'd copy, resource field overlaid */
93#define IORESOURCE_ROM_BIOS_COPY (1<<3) /* ROM is BIOS copy, resource field overlaid */
94
95/* PCI control bits. Shares IORESOURCE_BITS with above PCI ROM. */
96#define IORESOURCE_PCI_FIXED (1<<4) /* Do not move resource */
97
98/* PC/ISA/whatever - the normal PC address spaces: IO and memory */
99extern struct resource ioport_resource;
100extern struct resource iomem_resource;
101
102extern int request_resource(struct resource *root, struct resource *new);
103extern int release_resource(struct resource *new);
104extern int insert_resource(struct resource *parent, struct resource *new);
105extern int allocate_resource(struct resource *root, struct resource *new,
106 resource_size_t size, resource_size_t min,
107 resource_size_t max, resource_size_t align,
108 void (*alignf)(void *, struct resource *,
109 resource_size_t, resource_size_t),
110 void *alignf_data);
111int adjust_resource(struct resource *res, resource_size_t start,
112 resource_size_t size);
113
114/* Convenience shorthand with allocation */
115#define request_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name))
116#define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name))
117#define rename_region(region, newname) do { (region)->name = (newname); } while (0)
118
119extern struct resource * __request_region(struct resource *,
120 resource_size_t start,
121 resource_size_t n, const char *name);
122
123/* Compatibility cruft */
124#define release_region(start,n) __release_region(&ioport_resource, (start), (n))
125#define check_mem_region(start,n) __check_region(&iomem_resource, (start), (n))
126#define release_mem_region(start,n) __release_region(&iomem_resource, (start), (n))
127
128extern int __check_region(struct resource *, resource_size_t, resource_size_t);
129extern void __release_region(struct resource *, resource_size_t,
130 resource_size_t);
131
132static inline int __deprecated check_region(resource_size_t s,
133 resource_size_t n)
134{
135 return __check_region(&ioport_resource, s, n);
136}
137
138/* Wrappers for managed devices */
139struct device;
140#define devm_request_region(dev,start,n,name) \
141 __devm_request_region(dev, &ioport_resource, (start), (n), (name))
142#define devm_request_mem_region(dev,start,n,name) \
143 __devm_request_region(dev, &iomem_resource, (start), (n), (name))
144
145extern struct resource * __devm_request_region(struct device *dev,
146 struct resource *parent, resource_size_t start,
147 resource_size_t n, const char *name);
148
149#define devm_release_region(start,n) \
150 __devm_release_region(dev, &ioport_resource, (start), (n))
151#define devm_release_mem_region(start,n) \
152 __devm_release_region(dev, &iomem_resource, (start), (n))
153
154extern void __devm_release_region(struct device *dev, struct resource *parent,
155 resource_size_t start, resource_size_t n);
156
157#endif /* __ASSEMBLY__ */
158#endif /* _LINUX_IOPORT_H */