tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
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_TYPE_BITS 0x00001f00 /* Resource type */
38#define IORESOURCE_IO 0x00000100
39#define IORESOURCE_MEM 0x00000200
40#define IORESOURCE_IRQ 0x00000400
41#define IORESOURCE_DMA 0x00000800
42#define IORESOURCE_BUS 0x00001000
43
44#define IORESOURCE_PREFETCH 0x00002000 /* No side effects */
45#define IORESOURCE_READONLY 0x00004000
46#define IORESOURCE_CACHEABLE 0x00008000
47#define IORESOURCE_RANGELENGTH 0x00010000
48#define IORESOURCE_SHADOWABLE 0x00020000
49
50#define IORESOURCE_SIZEALIGN 0x00040000 /* size indicates alignment */
51#define IORESOURCE_STARTALIGN 0x00080000 /* start field is alignment */
52
53#define IORESOURCE_MEM_64 0x00100000
54#define IORESOURCE_WINDOW 0x00200000 /* forwarded by bridge */
55#define IORESOURCE_MUXED 0x00400000 /* Resource is software muxed */
56
57#define IORESOURCE_EXCLUSIVE 0x08000000 /* Userland may not map this resource */
58#define IORESOURCE_DISABLED 0x10000000
59#define IORESOURCE_UNSET 0x20000000
60#define IORESOURCE_AUTO 0x40000000
61#define IORESOURCE_BUSY 0x80000000 /* Driver has marked this resource busy */
62
63/* PnP IRQ specific bits (IORESOURCE_BITS) */
64#define IORESOURCE_IRQ_HIGHEDGE (1<<0)
65#define IORESOURCE_IRQ_LOWEDGE (1<<1)
66#define IORESOURCE_IRQ_HIGHLEVEL (1<<2)
67#define IORESOURCE_IRQ_LOWLEVEL (1<<3)
68#define IORESOURCE_IRQ_SHAREABLE (1<<4)
69#define IORESOURCE_IRQ_OPTIONAL (1<<5)
70
71/* PnP DMA specific bits (IORESOURCE_BITS) */
72#define IORESOURCE_DMA_TYPE_MASK (3<<0)
73#define IORESOURCE_DMA_8BIT (0<<0)
74#define IORESOURCE_DMA_8AND16BIT (1<<0)
75#define IORESOURCE_DMA_16BIT (2<<0)
76
77#define IORESOURCE_DMA_MASTER (1<<2)
78#define IORESOURCE_DMA_BYTE (1<<3)
79#define IORESOURCE_DMA_WORD (1<<4)
80
81#define IORESOURCE_DMA_SPEED_MASK (3<<6)
82#define IORESOURCE_DMA_COMPATIBLE (0<<6)
83#define IORESOURCE_DMA_TYPEA (1<<6)
84#define IORESOURCE_DMA_TYPEB (2<<6)
85#define IORESOURCE_DMA_TYPEF (3<<6)
86
87/* PnP memory I/O specific bits (IORESOURCE_BITS) */
88#define IORESOURCE_MEM_WRITEABLE (1<<0) /* dup: IORESOURCE_READONLY */
89#define IORESOURCE_MEM_CACHEABLE (1<<1) /* dup: IORESOURCE_CACHEABLE */
90#define IORESOURCE_MEM_RANGELENGTH (1<<2) /* dup: IORESOURCE_RANGELENGTH */
91#define IORESOURCE_MEM_TYPE_MASK (3<<3)
92#define IORESOURCE_MEM_8BIT (0<<3)
93#define IORESOURCE_MEM_16BIT (1<<3)
94#define IORESOURCE_MEM_8AND16BIT (2<<3)
95#define IORESOURCE_MEM_32BIT (3<<3)
96#define IORESOURCE_MEM_SHADOWABLE (1<<5) /* dup: IORESOURCE_SHADOWABLE */
97#define IORESOURCE_MEM_EXPANSIONROM (1<<6)
98
99/* PnP I/O specific bits (IORESOURCE_BITS) */
100#define IORESOURCE_IO_16BIT_ADDR (1<<0)
101#define IORESOURCE_IO_FIXED (1<<1)
102
103/* PCI ROM control bits (IORESOURCE_BITS) */
104#define IORESOURCE_ROM_ENABLE (1<<0) /* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */
105#define IORESOURCE_ROM_SHADOW (1<<1) /* ROM is copy at C000:0 */
106#define IORESOURCE_ROM_COPY (1<<2) /* ROM is alloc'd copy, resource field overlaid */
107#define IORESOURCE_ROM_BIOS_COPY (1<<3) /* ROM is BIOS copy, resource field overlaid */
108
109/* PCI control bits. Shares IORESOURCE_BITS with above PCI ROM. */
110#define IORESOURCE_PCI_FIXED (1<<4) /* Do not move resource */
111
112/* PC/ISA/whatever - the normal PC address spaces: IO and memory */
113extern struct resource ioport_resource;
114extern struct resource iomem_resource;
115
116extern struct resource *request_resource_conflict(struct resource *root, struct resource *new);
117extern int request_resource(struct resource *root, struct resource *new);
118extern int release_resource(struct resource *new);
119void release_child_resources(struct resource *new);
120extern void reserve_region_with_split(struct resource *root,
121 resource_size_t start, resource_size_t end,
122 const char *name);
123extern struct resource *insert_resource_conflict(struct resource *parent, struct resource *new);
124extern int insert_resource(struct resource *parent, struct resource *new);
125extern void insert_resource_expand_to_fit(struct resource *root, struct resource *new);
126extern int allocate_resource(struct resource *root, struct resource *new,
127 resource_size_t size, resource_size_t min,
128 resource_size_t max, resource_size_t align,
129 resource_size_t (*alignf)(void *,
130 const struct resource *,
131 resource_size_t,
132 resource_size_t),
133 void *alignf_data);
134int adjust_resource(struct resource *res, resource_size_t start,
135 resource_size_t size);
136resource_size_t resource_alignment(struct resource *res);
137static inline resource_size_t resource_size(const struct resource *res)
138{
139 return res->end - res->start + 1;
140}
141static inline unsigned long resource_type(const struct resource *res)
142{
143 return res->flags & IORESOURCE_TYPE_BITS;
144}
145
146/* Convenience shorthand with allocation */
147#define request_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name), 0)
148#define request_muxed_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name), IORESOURCE_MUXED)
149#define __request_mem_region(start,n,name, excl) __request_region(&iomem_resource, (start), (n), (name), excl)
150#define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name), 0)
151#define request_mem_region_exclusive(start,n,name) \
152 __request_region(&iomem_resource, (start), (n), (name), IORESOURCE_EXCLUSIVE)
153#define rename_region(region, newname) do { (region)->name = (newname); } while (0)
154
155extern struct resource * __request_region(struct resource *,
156 resource_size_t start,
157 resource_size_t n,
158 const char *name, int flags);
159
160/* Compatibility cruft */
161#define release_region(start,n) __release_region(&ioport_resource, (start), (n))
162#define check_mem_region(start,n) __check_region(&iomem_resource, (start), (n))
163#define release_mem_region(start,n) __release_region(&iomem_resource, (start), (n))
164
165extern int __check_region(struct resource *, resource_size_t, resource_size_t);
166extern void __release_region(struct resource *, resource_size_t,
167 resource_size_t);
168
169static inline int __deprecated check_region(resource_size_t s,
170 resource_size_t n)
171{
172 return __check_region(&ioport_resource, s, n);
173}
174
175/* Wrappers for managed devices */
176struct device;
177#define devm_request_region(dev,start,n,name) \
178 __devm_request_region(dev, &ioport_resource, (start), (n), (name))
179#define devm_request_mem_region(dev,start,n,name) \
180 __devm_request_region(dev, &iomem_resource, (start), (n), (name))
181
182extern struct resource * __devm_request_region(struct device *dev,
183 struct resource *parent, resource_size_t start,
184 resource_size_t n, const char *name);
185
186#define devm_release_region(dev, start, n) \
187 __devm_release_region(dev, &ioport_resource, (start), (n))
188#define devm_release_mem_region(dev, start, n) \
189 __devm_release_region(dev, &iomem_resource, (start), (n))
190
191extern void __devm_release_region(struct device *dev, struct resource *parent,
192 resource_size_t start, resource_size_t n);
193extern int iomem_map_sanity_check(resource_size_t addr, unsigned long size);
194extern int iomem_is_exclusive(u64 addr);
195
196extern int
197walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages,
198 void *arg, int (*func)(unsigned long, unsigned long, void *));
199
200#endif /* __ASSEMBLY__ */
201#endif /* _LINUX_IOPORT_H */