source: GPL/include/linux/ioport.h@ 1

Last change on this file since 1 was 1, checked in by vladest, 20 years ago

initial import
File size: 4.1 KB
Line 
1/* $Id: ioport.h,v 1.1.1.1 2003/07/02 13:57:00 eleph Exp $ */
2
3/*
4 * ioport.h Definitions of routines for detecting, reserving and
5 * allocating system resources.
6 *
7 * Authors: Linus Torvalds
8 */
9
10#ifndef _LINUX_IOPORT_H
11#define _LINUX_IOPORT_H
12
13/*
14 * Resources are tree-like, allowing
15 * nesting etc..
16 */
17struct resource {
18 const char *name;
19 unsigned long start, end;
20 unsigned long flags;
21 struct resource *parent, *sibling, *child;
22};
23
24/*
25 * IO resources have these defined flags.
26 */
27#define IORESOURCE_BITS 0x000000ff /* Bus-specific bits */
28
29#define IORESOURCE_IO 0x00000100 /* Resource type */
30#define IORESOURCE_MEM 0x00000200
31#define IORESOURCE_IRQ 0x00000400
32#define IORESOURCE_DMA 0x00000800
33
34#define IORESOURCE_PREFETCH 0x00001000 /* No side effects */
35#define IORESOURCE_READONLY 0x00002000
36#define IORESOURCE_CACHEABLE 0x00004000
37#define IORESOURCE_RANGELENGTH 0x00008000
38#define IORESOURCE_SHADOWABLE 0x00010000
39
40#define IORESOURCE_UNSET 0x20000000
41#define IORESOURCE_AUTO 0x40000000
42#define IORESOURCE_BUSY 0x80000000 /* Driver has marked this resource busy */
43
44/* ISA PnP IRQ specific bits (IORESOURCE_BITS) */
45#define IORESOURCE_IRQ_HIGHEDGE (1<<0)
46#define IORESOURCE_IRQ_LOWEDGE (1<<1)
47#define IORESOURCE_IRQ_HIGHLEVEL (1<<2)
48#define IORESOURCE_IRQ_LOWLEVEL (1<<3)
49
50/* ISA PnP DMA specific bits (IORESOURCE_BITS) */
51#define IORESOURCE_DMA_TYPE_MASK (3<<0)
52#define IORESOURCE_DMA_8BIT (0<<0)
53#define IORESOURCE_DMA_8AND16BIT (1<<0)
54#define IORESOURCE_DMA_16BIT (2<<0)
55
56#define IORESOURCE_DMA_MASTER (1<<2)
57#define IORESOURCE_DMA_BYTE (1<<3)
58#define IORESOURCE_DMA_WORD (1<<4)
59
60#define IORESOURCE_DMA_SPEED_MASK (3<<6)
61#define IORESOURCE_DMA_COMPATIBLE (0<<6)
62#define IORESOURCE_DMA_TYPEA (1<<6)
63#define IORESOURCE_DMA_TYPEB (2<<6)
64#define IORESOURCE_DMA_TYPEF (3<<6)
65
66/* ISA PnP memory I/O specific bits (IORESOURCE_BITS) */
67#define IORESOURCE_MEM_WRITEABLE (1<<0) /* dup: IORESOURCE_READONLY */
68#define IORESOURCE_MEM_CACHEABLE (1<<1) /* dup: IORESOURCE_CACHEABLE */
69#define IORESOURCE_MEM_RANGELENGTH (1<<2) /* dup: IORESOURCE_RANGELENGTH */
70#define IORESOURCE_MEM_TYPE_MASK (3<<3)
71#define IORESOURCE_MEM_8BIT (0<<3)
72#define IORESOURCE_MEM_16BIT (1<<3)
73#define IORESOURCE_MEM_8AND16BIT (2<<3)
74#define IORESOURCE_MEM_SHADOWABLE (1<<5) /* dup: IORESOURCE_SHADOWABLE */
75#define IORESOURCE_MEM_EXPANSIONROM (1<<6)
76
77/* PC/ISA/whatever - the normal PC address spaces: IO and memory */
78extern struct resource ioport_resource;
79extern struct resource iomem_resource;
80
81extern int get_resource_list(struct resource *, char *buf, int size);
82
83extern int request_resource(struct resource *root, struct resource *newres);
84extern int release_resource(struct resource *newres);
85extern int allocate_resource(struct resource *root, struct resource *newres,
86 unsigned long size,
87 unsigned long min, unsigned long max,
88 unsigned long align);
89
90/* Convenience shorthand with allocation */
91#define request_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name))
92#define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name))
93
94extern struct resource * __request_region(struct resource *, unsigned long start, unsigned long n, const char *name);
95
96/* Compatibility cruft */
97#define check_region(start,n) __check_region(&ioport_resource, (start), (n))
98#define release_region(start,n) __release_region(&ioport_resource, (start), (n))
99#define check_mem_region(start,n) __check_region(&iomem_resource, (start), (n))
100#define release_mem_region(start,n) __release_region(&iomem_resource, (start), (n))
101
102extern int __check_region(struct resource *, unsigned long, unsigned long);
103extern void __release_region(struct resource *, unsigned long, unsigned long);
104
105#define get_ioport_list(buf) get_resource_list(&ioport_resource, buf, PAGE_SIZE)
106#define get_mem_list(buf) get_resource_list(&iomem_resource, buf, PAGE_SIZE)
107
108#define HAVE_AUTOIRQ
109extern void autoirq_setup(int waittime);
110extern int autoirq_report(int waittime);
111
112#endif /* _LINUX_IOPORT_H */
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