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#include <linux/compiler.h>
12#include <linux/types.h>
13/*
14 * Resources are tree-like, allowing
15 * nesting etc..
16 */
17struct resource {
18	resource_size_t start;
19	resource_size_t end;
20	const char *name;
21	unsigned long flags;
22	struct resource *parent, *sibling, *child;
23};
24
25struct resource_list {
26	struct resource_list *next;
27	struct resource *res;
28	struct pci_dev *dev;
29};
30
31/*
32 * IO resources have these defined flags.
33 */
34#define IORESOURCE_BITS		0x000000ff	/* Bus-specific bits */
35
36#define IORESOURCE_IO		0x00000100	/* Resource type */
37#define IORESOURCE_MEM		0x00000200
38#define IORESOURCE_IRQ		0x00000400
39#define IORESOURCE_DMA		0x00000800
40
41#define IORESOURCE_PREFETCH	0x00001000	/* No side effects */
42#define IORESOURCE_READONLY	0x00002000
43#define IORESOURCE_CACHEABLE	0x00004000
44#define IORESOURCE_RANGELENGTH	0x00008000
45#define IORESOURCE_SHADOWABLE	0x00010000
46#define IORESOURCE_BUS_HAS_VGA	0x00080000
47
48#define IORESOURCE_DISABLED	0x10000000
49#define IORESOURCE_UNSET	0x20000000
50#define IORESOURCE_AUTO		0x40000000
51#define IORESOURCE_BUSY		0x80000000	/* Driver has marked this resource busy */
52
53/* ISA PnP IRQ specific bits (IORESOURCE_BITS) */
54#define IORESOURCE_IRQ_HIGHEDGE		(1<<0)
55#define IORESOURCE_IRQ_LOWEDGE		(1<<1)
56#define IORESOURCE_IRQ_HIGHLEVEL	(1<<2)
57#define IORESOURCE_IRQ_LOWLEVEL		(1<<3)
58#define IORESOURCE_IRQ_SHAREABLE	(1<<4)
59
60/* ISA PnP DMA specific bits (IORESOURCE_BITS) */
61#define IORESOURCE_DMA_TYPE_MASK	(3<<0)
62#define IORESOURCE_DMA_8BIT		(0<<0)
63#define IORESOURCE_DMA_8AND16BIT	(1<<0)
64#define IORESOURCE_DMA_16BIT		(2<<0)
65
66#define IORESOURCE_DMA_MASTER		(1<<2)
67#define IORESOURCE_DMA_BYTE		(1<<3)
68#define IORESOURCE_DMA_WORD		(1<<4)
69
70#define IORESOURCE_DMA_SPEED_MASK	(3<<6)
71#define IORESOURCE_DMA_COMPATIBLE	(0<<6)
72#define IORESOURCE_DMA_TYPEA		(1<<6)
73#define IORESOURCE_DMA_TYPEB		(2<<6)
74#define IORESOURCE_DMA_TYPEF		(3<<6)
75
76/* ISA PnP memory I/O specific bits (IORESOURCE_BITS) */
77#define IORESOURCE_MEM_WRITEABLE	(1<<0)	/* dup: IORESOURCE_READONLY */
78#define IORESOURCE_MEM_CACHEABLE	(1<<1)	/* dup: IORESOURCE_CACHEABLE */
79#define IORESOURCE_MEM_RANGELENGTH	(1<<2)	/* dup: IORESOURCE_RANGELENGTH */
80#define IORESOURCE_MEM_TYPE_MASK	(3<<3)
81#define IORESOURCE_MEM_8BIT		(0<<3)
82#define IORESOURCE_MEM_16BIT		(1<<3)
83#define IORESOURCE_MEM_8AND16BIT	(2<<3)
84#define IORESOURCE_MEM_32BIT		(3<<3)
85#define IORESOURCE_MEM_SHADOWABLE	(1<<5)	/* dup: IORESOURCE_SHADOWABLE */
86#define IORESOURCE_MEM_EXPANSIONROM	(1<<6)
87
88/* PCI ROM control bits (IORESOURCE_BITS) */
89#define IORESOURCE_ROM_ENABLE		(1<<0)	/* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */
90#define IORESOURCE_ROM_SHADOW		(1<<1)	/* ROM is copy at C000:0 */
91#define IORESOURCE_ROM_COPY		(1<<2)	/* ROM is alloc'd copy, resource field overlaid */
92
93/* PC/ISA/whatever - the normal PC address spaces: IO and memory */
94extern struct resource ioport_resource;
95extern struct resource iomem_resource;
96
97extern int request_resource(struct resource *root, struct resource *new);
98extern struct resource * ____request_resource(struct resource *root, struct resource *new);
99extern int release_resource(struct resource *new);
100extern int insert_resource(struct resource *parent, struct resource *new);
101extern int allocate_resource(struct resource *root, struct resource *new,
102			     resource_size_t size, resource_size_t min,
103			     resource_size_t max, resource_size_t align,
104			     void (*alignf)(void *, struct resource *,
105					    resource_size_t, resource_size_t),
106			     void *alignf_data);
107int adjust_resource(struct resource *res, resource_size_t start,
108		    resource_size_t size);
109
110/* get registered SYSTEM_RAM resources in specified area */
111extern int find_next_system_ram(struct resource *res);
112
113/* Convenience shorthand with allocation */
114#define request_region(start,n,name)	__request_region(&ioport_resource, (start), (n), (name))
115#define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name))
116#define rename_region(region, newname) do { (region)->name = (newname); } while (0)
117
118extern struct resource * __request_region(struct resource *,
119					resource_size_t start,
120					resource_size_t n, const char *name);
121
122/* Compatibility cruft */
123#define release_region(start,n)	__release_region(&ioport_resource, (start), (n))
124#define check_mem_region(start,n)	__check_region(&iomem_resource, (start), (n))
125#define release_mem_region(start,n)	__release_region(&iomem_resource, (start), (n))
126
127extern int __check_region(struct resource *, resource_size_t, resource_size_t);
128extern void __release_region(struct resource *, resource_size_t,
129				resource_size_t);
130
131static inline int __deprecated check_region(resource_size_t s,
132						resource_size_t n)
133{
134	return __check_region(&ioport_resource, s, n);
135}
136#endif	/* _LINUX_IOPORT_H */
137