blob: d42c83399071fd61600a48eecbf67bc59c42d681 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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>
Greg Kroah-Hartmancf7c7122006-06-12 15:49:31 -070012#include <linux/types.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070013/*
14 * Resources are tree-like, allowing
15 * nesting etc..
16 */
17struct resource {
Greg Kroah-Hartmancf7c7122006-06-12 15:49:31 -070018 resource_size_t start;
19 resource_size_t end;
Linus Torvalds1da177e2005-04-16 15:20:36 -070020 const char *name;
Linus Torvalds1da177e2005-04-16 15:20:36 -070021 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)
Bjorn Helgaasc32928c2006-07-03 00:24:10 -070058#define IORESOURCE_IRQ_SHAREABLE (1<<4)
Linus Torvalds1da177e2005-04-16 15:20:36 -070059
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);
Adrian Bunkcd6ef2ad2006-06-30 02:15:42 -0700100extern int insert_resource(struct resource *parent, struct resource *new);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101extern int allocate_resource(struct resource *root, struct resource *new,
Greg Kroah-Hartmand75fc8b2006-06-12 16:09:23 -0700102 resource_size_t size, resource_size_t min,
103 resource_size_t max, resource_size_t align,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 void (*alignf)(void *, struct resource *,
Greg Kroah-Hartmand75fc8b2006-06-12 16:09:23 -0700105 resource_size_t, resource_size_t),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106 void *alignf_data);
Greg Kroah-Hartmand75fc8b2006-06-12 16:09:23 -0700107int adjust_resource(struct resource *res, resource_size_t start,
108 resource_size_t size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109
KAMEZAWA Hiroyuki2842f112006-06-27 02:53:36 -0700110/* get registered SYSTEM_RAM resources in specified area */
111extern int find_next_system_ram(struct resource *res);
112
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113/* 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
Greg Kroah-Hartmand75fc8b2006-06-12 16:09:23 -0700118extern struct resource * __request_region(struct resource *,
119 resource_size_t start,
120 resource_size_t n, const char *name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121
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
Greg Kroah-Hartmand75fc8b2006-06-12 16:09:23 -0700127extern int __check_region(struct resource *, resource_size_t, resource_size_t);
128extern void __release_region(struct resource *, resource_size_t,
129 resource_size_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130
Greg Kroah-Hartmand75fc8b2006-06-12 16:09:23 -0700131static inline int __deprecated check_region(resource_size_t s,
132 resource_size_t n)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133{
134 return __check_region(&ioport_resource, s, n);
135}
136#endif /* _LINUX_IOPORT_H */