Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Bernhard Walle | c9cce83 | 2008-01-30 13:30:32 +0100 | [diff] [blame] | 11 | #ifndef __ASSEMBLY__ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | #include <linux/compiler.h> |
Greg Kroah-Hartman | cf7c712 | 2006-06-12 15:49:31 -0700 | [diff] [blame] | 13 | #include <linux/types.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | /* |
| 15 | * Resources are tree-like, allowing |
| 16 | * nesting etc.. |
| 17 | */ |
| 18 | struct resource { |
Greg Kroah-Hartman | cf7c712 | 2006-06-12 15:49:31 -0700 | [diff] [blame] | 19 | resource_size_t start; |
| 20 | resource_size_t end; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | const char *name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | unsigned long flags; |
| 23 | struct resource *parent, *sibling, *child; |
| 24 | }; |
| 25 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | /* |
| 27 | * IO resources have these defined flags. |
| 28 | */ |
| 29 | #define IORESOURCE_BITS 0x000000ff /* Bus-specific bits */ |
| 30 | |
Bjorn Helgaas | cd7e9fc | 2010-03-05 10:47:26 -0700 | [diff] [blame] | 31 | #define IORESOURCE_TYPE_BITS 0x00001f00 /* Resource type */ |
Mark Brown | c04a9cb | 2012-08-07 19:42:46 +0100 | [diff] [blame] | 32 | #define IORESOURCE_IO 0x00000100 /* PCI/ISA I/O ports */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #define IORESOURCE_MEM 0x00000200 |
Mark Brown | 72dcb11 | 2012-08-07 19:42:45 +0100 | [diff] [blame] | 34 | #define IORESOURCE_REG 0x00000300 /* Register offsets */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #define IORESOURCE_IRQ 0x00000400 |
| 36 | #define IORESOURCE_DMA 0x00000800 |
Bjorn Helgaas | 0f4050c | 2010-03-05 10:47:42 -0700 | [diff] [blame] | 37 | #define IORESOURCE_BUS 0x00001000 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | |
Bjorn Helgaas | cd7e9fc | 2010-03-05 10:47:26 -0700 | [diff] [blame] | 39 | #define IORESOURCE_PREFETCH 0x00002000 /* No side effects */ |
| 40 | #define IORESOURCE_READONLY 0x00004000 |
| 41 | #define IORESOURCE_CACHEABLE 0x00008000 |
| 42 | #define IORESOURCE_RANGELENGTH 0x00010000 |
| 43 | #define IORESOURCE_SHADOWABLE 0x00020000 |
Ivan Kokshaysky | 8845256 | 2008-03-30 19:50:14 +0400 | [diff] [blame] | 44 | |
Bjorn Helgaas | cd7e9fc | 2010-03-05 10:47:26 -0700 | [diff] [blame] | 45 | #define IORESOURCE_SIZEALIGN 0x00040000 /* size indicates alignment */ |
| 46 | #define IORESOURCE_STARTALIGN 0x00080000 /* start field is alignment */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | |
Yinghai Lu | 1f82de1 | 2009-04-23 20:48:32 -0700 | [diff] [blame] | 48 | #define IORESOURCE_MEM_64 0x00100000 |
Bjorn Helgaas | 9d7cca0 | 2010-03-05 10:47:47 -0700 | [diff] [blame] | 49 | #define IORESOURCE_WINDOW 0x00200000 /* forwarded by bridge */ |
Alan Cox | 8b6d043 | 2010-03-29 19:38:00 +0200 | [diff] [blame] | 50 | #define IORESOURCE_MUXED 0x00400000 /* Resource is software muxed */ |
Yinghai Lu | 1f82de1 | 2009-04-23 20:48:32 -0700 | [diff] [blame] | 51 | |
Arjan van de Ven | e8de148 | 2008-10-22 19:55:31 -0700 | [diff] [blame] | 52 | #define IORESOURCE_EXCLUSIVE 0x08000000 /* Userland may not map this resource */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | #define IORESOURCE_DISABLED 0x10000000 |
Bjorn Helgaas | d19cb80 | 2014-02-26 11:25:56 -0700 | [diff] [blame] | 54 | #define IORESOURCE_UNSET 0x20000000 /* No address assigned yet */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | #define IORESOURCE_AUTO 0x40000000 |
| 56 | #define IORESOURCE_BUSY 0x80000000 /* Driver has marked this resource busy */ |
| 57 | |
Bjorn Helgaas | e9fe9e1 | 2008-06-09 16:52:04 -0700 | [diff] [blame] | 58 | /* PnP IRQ specific bits (IORESOURCE_BITS) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | #define IORESOURCE_IRQ_HIGHEDGE (1<<0) |
| 60 | #define IORESOURCE_IRQ_LOWEDGE (1<<1) |
| 61 | #define IORESOURCE_IRQ_HIGHLEVEL (1<<2) |
| 62 | #define IORESOURCE_IRQ_LOWLEVEL (1<<3) |
Bjorn Helgaas | c32928c | 2006-07-03 00:24:10 -0700 | [diff] [blame] | 63 | #define IORESOURCE_IRQ_SHAREABLE (1<<4) |
Bjorn Helgaas | d5ebde6 | 2008-06-27 16:57:14 -0600 | [diff] [blame] | 64 | #define IORESOURCE_IRQ_OPTIONAL (1<<5) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | |
Bjorn Helgaas | e9fe9e1 | 2008-06-09 16:52:04 -0700 | [diff] [blame] | 66 | /* PnP DMA specific bits (IORESOURCE_BITS) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | #define IORESOURCE_DMA_TYPE_MASK (3<<0) |
| 68 | #define IORESOURCE_DMA_8BIT (0<<0) |
| 69 | #define IORESOURCE_DMA_8AND16BIT (1<<0) |
| 70 | #define IORESOURCE_DMA_16BIT (2<<0) |
| 71 | |
| 72 | #define IORESOURCE_DMA_MASTER (1<<2) |
| 73 | #define IORESOURCE_DMA_BYTE (1<<3) |
| 74 | #define IORESOURCE_DMA_WORD (1<<4) |
| 75 | |
| 76 | #define IORESOURCE_DMA_SPEED_MASK (3<<6) |
| 77 | #define IORESOURCE_DMA_COMPATIBLE (0<<6) |
| 78 | #define IORESOURCE_DMA_TYPEA (1<<6) |
| 79 | #define IORESOURCE_DMA_TYPEB (2<<6) |
| 80 | #define IORESOURCE_DMA_TYPEF (3<<6) |
| 81 | |
Bjorn Helgaas | e9fe9e1 | 2008-06-09 16:52:04 -0700 | [diff] [blame] | 82 | /* PnP memory I/O specific bits (IORESOURCE_BITS) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | #define IORESOURCE_MEM_WRITEABLE (1<<0) /* dup: IORESOURCE_READONLY */ |
| 84 | #define IORESOURCE_MEM_CACHEABLE (1<<1) /* dup: IORESOURCE_CACHEABLE */ |
| 85 | #define IORESOURCE_MEM_RANGELENGTH (1<<2) /* dup: IORESOURCE_RANGELENGTH */ |
| 86 | #define IORESOURCE_MEM_TYPE_MASK (3<<3) |
| 87 | #define IORESOURCE_MEM_8BIT (0<<3) |
| 88 | #define IORESOURCE_MEM_16BIT (1<<3) |
| 89 | #define IORESOURCE_MEM_8AND16BIT (2<<3) |
| 90 | #define IORESOURCE_MEM_32BIT (3<<3) |
| 91 | #define IORESOURCE_MEM_SHADOWABLE (1<<5) /* dup: IORESOURCE_SHADOWABLE */ |
| 92 | #define IORESOURCE_MEM_EXPANSIONROM (1<<6) |
| 93 | |
Bjorn Helgaas | 08c9f26 | 2008-06-27 16:57:03 -0600 | [diff] [blame] | 94 | /* PnP I/O specific bits (IORESOURCE_BITS) */ |
| 95 | #define IORESOURCE_IO_16BIT_ADDR (1<<0) |
| 96 | #define IORESOURCE_IO_FIXED (1<<1) |
| 97 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | /* PCI ROM control bits (IORESOURCE_BITS) */ |
| 99 | #define IORESOURCE_ROM_ENABLE (1<<0) /* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */ |
| 100 | #define IORESOURCE_ROM_SHADOW (1<<1) /* ROM is copy at C000:0 */ |
| 101 | #define IORESOURCE_ROM_COPY (1<<2) /* ROM is alloc'd copy, resource field overlaid */ |
John Keller | a2302c6 | 2006-10-04 16:49:52 -0500 | [diff] [blame] | 102 | #define IORESOURCE_ROM_BIOS_COPY (1<<3) /* ROM is BIOS copy, resource field overlaid */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | |
Ralf Baechle | fb0f2b4 | 2006-12-19 13:12:08 -0800 | [diff] [blame] | 104 | /* PCI control bits. Shares IORESOURCE_BITS with above PCI ROM. */ |
| 105 | #define IORESOURCE_PCI_FIXED (1<<4) /* Do not move resource */ |
| 106 | |
Uwe Kleine-König | a0e44d4 | 2011-07-25 17:13:00 -0700 | [diff] [blame] | 107 | |
| 108 | /* helpers to define resources */ |
| 109 | #define DEFINE_RES_NAMED(_start, _size, _name, _flags) \ |
| 110 | { \ |
| 111 | .start = (_start), \ |
| 112 | .end = (_start) + (_size) - 1, \ |
| 113 | .name = (_name), \ |
| 114 | .flags = (_flags), \ |
| 115 | } |
| 116 | |
| 117 | #define DEFINE_RES_IO_NAMED(_start, _size, _name) \ |
| 118 | DEFINE_RES_NAMED((_start), (_size), (_name), IORESOURCE_IO) |
| 119 | #define DEFINE_RES_IO(_start, _size) \ |
| 120 | DEFINE_RES_IO_NAMED((_start), (_size), NULL) |
| 121 | |
| 122 | #define DEFINE_RES_MEM_NAMED(_start, _size, _name) \ |
| 123 | DEFINE_RES_NAMED((_start), (_size), (_name), IORESOURCE_MEM) |
| 124 | #define DEFINE_RES_MEM(_start, _size) \ |
| 125 | DEFINE_RES_MEM_NAMED((_start), (_size), NULL) |
| 126 | |
| 127 | #define DEFINE_RES_IRQ_NAMED(_irq, _name) \ |
| 128 | DEFINE_RES_NAMED((_irq), 1, (_name), IORESOURCE_IRQ) |
| 129 | #define DEFINE_RES_IRQ(_irq) \ |
| 130 | DEFINE_RES_IRQ_NAMED((_irq), NULL) |
| 131 | |
| 132 | #define DEFINE_RES_DMA_NAMED(_dma, _name) \ |
| 133 | DEFINE_RES_NAMED((_dma), 1, (_name), IORESOURCE_DMA) |
| 134 | #define DEFINE_RES_DMA(_dma) \ |
| 135 | DEFINE_RES_DMA_NAMED((_dma), NULL) |
| 136 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | /* PC/ISA/whatever - the normal PC address spaces: IO and memory */ |
| 138 | extern struct resource ioport_resource; |
| 139 | extern struct resource iomem_resource; |
| 140 | |
Bjorn Helgaas | 66f1207 | 2010-03-11 17:01:09 -0700 | [diff] [blame] | 141 | extern struct resource *request_resource_conflict(struct resource *root, struct resource *new); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | extern int request_resource(struct resource *root, struct resource *new); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | extern int release_resource(struct resource *new); |
Yinghai Lu | 5eeec0e | 2009-12-22 15:02:22 -0800 | [diff] [blame] | 144 | void release_child_resources(struct resource *new); |
Yinghai Lu | 268364a | 2008-09-04 21:02:44 +0200 | [diff] [blame] | 145 | extern void reserve_region_with_split(struct resource *root, |
| 146 | resource_size_t start, resource_size_t end, |
| 147 | const char *name); |
Bjorn Helgaas | 66f1207 | 2010-03-11 17:01:09 -0700 | [diff] [blame] | 148 | extern struct resource *insert_resource_conflict(struct resource *parent, struct resource *new); |
Adrian Bunk | cd6ef2ad | 2006-06-30 02:15:42 -0700 | [diff] [blame] | 149 | extern int insert_resource(struct resource *parent, struct resource *new); |
Linus Torvalds | bef69ea | 2008-08-29 20:18:31 -0700 | [diff] [blame] | 150 | extern void insert_resource_expand_to_fit(struct resource *root, struct resource *new); |
Bjorn Helgaas | fcb1191 | 2010-12-16 10:38:46 -0700 | [diff] [blame] | 151 | extern void arch_remove_reservations(struct resource *avail); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | extern int allocate_resource(struct resource *root, struct resource *new, |
Greg Kroah-Hartman | d75fc8b | 2006-06-12 16:09:23 -0700 | [diff] [blame] | 153 | resource_size_t size, resource_size_t min, |
| 154 | resource_size_t max, resource_size_t align, |
Dominik Brodowski | b26b2d4 | 2010-01-01 17:40:49 +0100 | [diff] [blame] | 155 | resource_size_t (*alignf)(void *, |
Dominik Brodowski | 3b7a17f | 2010-01-01 17:40:50 +0100 | [diff] [blame] | 156 | const struct resource *, |
Dominik Brodowski | b26b2d4 | 2010-01-01 17:40:49 +0100 | [diff] [blame] | 157 | resource_size_t, |
| 158 | resource_size_t), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | void *alignf_data); |
Geert Uytterhoeven | 1c38891 | 2011-05-07 20:53:16 +0200 | [diff] [blame] | 160 | struct resource *lookup_resource(struct resource *root, resource_size_t start); |
Greg Kroah-Hartman | d75fc8b | 2006-06-12 16:09:23 -0700 | [diff] [blame] | 161 | int adjust_resource(struct resource *res, resource_size_t start, |
| 162 | resource_size_t size); |
Ivan Kokshaysky | 8845256 | 2008-03-30 19:50:14 +0400 | [diff] [blame] | 163 | resource_size_t resource_alignment(struct resource *res); |
Jean Delvare | f65380c | 2009-12-15 16:48:21 -0800 | [diff] [blame] | 164 | static inline resource_size_t resource_size(const struct resource *res) |
Magnus Damm | 1a4e564 | 2008-07-29 22:32:57 -0700 | [diff] [blame] | 165 | { |
| 166 | return res->end - res->start + 1; |
| 167 | } |
Jean Delvare | f65380c | 2009-12-15 16:48:21 -0800 | [diff] [blame] | 168 | static inline unsigned long resource_type(const struct resource *res) |
Magnus Damm | c9f6616 | 2008-10-15 22:05:15 -0700 | [diff] [blame] | 169 | { |
| 170 | return res->flags & IORESOURCE_TYPE_BITS; |
| 171 | } |
Bjorn Helgaas | 5edb93b | 2014-02-04 19:32:28 -0800 | [diff] [blame] | 172 | /* True iff r1 completely contains r2 */ |
| 173 | static inline bool resource_contains(struct resource *r1, struct resource *r2) |
| 174 | { |
| 175 | if (resource_type(r1) != resource_type(r2)) |
| 176 | return false; |
| 177 | if (r1->flags & IORESOURCE_UNSET || r2->flags & IORESOURCE_UNSET) |
| 178 | return false; |
| 179 | return r1->start <= r2->start && r1->end >= r2->end; |
| 180 | } |
| 181 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | /* Convenience shorthand with allocation */ |
Alan Cox | 8b6d043 | 2010-03-29 19:38:00 +0200 | [diff] [blame] | 184 | #define request_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name), 0) |
| 185 | #define request_muxed_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name), IORESOURCE_MUXED) |
Arjan van de Ven | e8de148 | 2008-10-22 19:55:31 -0700 | [diff] [blame] | 186 | #define __request_mem_region(start,n,name, excl) __request_region(&iomem_resource, (start), (n), (name), excl) |
| 187 | #define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name), 0) |
| 188 | #define request_mem_region_exclusive(start,n,name) \ |
| 189 | __request_region(&iomem_resource, (start), (n), (name), IORESOURCE_EXCLUSIVE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | #define rename_region(region, newname) do { (region)->name = (newname); } while (0) |
| 191 | |
Greg Kroah-Hartman | d75fc8b | 2006-06-12 16:09:23 -0700 | [diff] [blame] | 192 | extern struct resource * __request_region(struct resource *, |
| 193 | resource_size_t start, |
Randy Dunlap | 6ae301e | 2009-01-15 13:51:01 -0800 | [diff] [blame] | 194 | resource_size_t n, |
| 195 | const char *name, int flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | |
| 197 | /* Compatibility cruft */ |
| 198 | #define release_region(start,n) __release_region(&ioport_resource, (start), (n)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | #define release_mem_region(start,n) __release_region(&iomem_resource, (start), (n)) |
| 200 | |
Greg Kroah-Hartman | d75fc8b | 2006-06-12 16:09:23 -0700 | [diff] [blame] | 201 | extern void __release_region(struct resource *, resource_size_t, |
| 202 | resource_size_t); |
Toshi Kani | 825f787 | 2013-04-29 15:08:19 -0700 | [diff] [blame] | 203 | #ifdef CONFIG_MEMORY_HOTREMOVE |
| 204 | extern int release_mem_region_adjustable(struct resource *, resource_size_t, |
| 205 | resource_size_t); |
| 206 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | |
Tejun Heo | 9ac7849 | 2007-01-20 16:00:26 +0900 | [diff] [blame] | 208 | /* Wrappers for managed devices */ |
| 209 | struct device; |
Thierry Reding | 8d38821 | 2014-08-01 14:15:10 +0200 | [diff] [blame] | 210 | |
| 211 | extern int devm_request_resource(struct device *dev, struct resource *root, |
| 212 | struct resource *new); |
| 213 | extern void devm_release_resource(struct device *dev, struct resource *new); |
| 214 | |
Tejun Heo | 9ac7849 | 2007-01-20 16:00:26 +0900 | [diff] [blame] | 215 | #define devm_request_region(dev,start,n,name) \ |
| 216 | __devm_request_region(dev, &ioport_resource, (start), (n), (name)) |
| 217 | #define devm_request_mem_region(dev,start,n,name) \ |
| 218 | __devm_request_region(dev, &iomem_resource, (start), (n), (name)) |
| 219 | |
| 220 | extern struct resource * __devm_request_region(struct device *dev, |
| 221 | struct resource *parent, resource_size_t start, |
| 222 | resource_size_t n, const char *name); |
| 223 | |
Hiroshi DOYU | dea420c | 2008-09-13 02:33:07 -0700 | [diff] [blame] | 224 | #define devm_release_region(dev, start, n) \ |
Tejun Heo | 9ac7849 | 2007-01-20 16:00:26 +0900 | [diff] [blame] | 225 | __devm_release_region(dev, &ioport_resource, (start), (n)) |
Hiroshi DOYU | dea420c | 2008-09-13 02:33:07 -0700 | [diff] [blame] | 226 | #define devm_release_mem_region(dev, start, n) \ |
Tejun Heo | 9ac7849 | 2007-01-20 16:00:26 +0900 | [diff] [blame] | 227 | __devm_release_region(dev, &iomem_resource, (start), (n)) |
| 228 | |
| 229 | extern void __devm_release_region(struct device *dev, struct resource *parent, |
| 230 | resource_size_t start, resource_size_t n); |
Suresh Siddha | 379daf6 | 2008-09-25 18:43:34 -0700 | [diff] [blame] | 231 | extern int iomem_map_sanity_check(resource_size_t addr, unsigned long size); |
Arjan van de Ven | e8de148 | 2008-10-22 19:55:31 -0700 | [diff] [blame] | 232 | extern int iomem_is_exclusive(u64 addr); |
Tejun Heo | 9ac7849 | 2007-01-20 16:00:26 +0900 | [diff] [blame] | 233 | |
KAMEZAWA Hiroyuki | 908eedc | 2009-09-22 16:45:46 -0700 | [diff] [blame] | 234 | extern int |
| 235 | walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages, |
| 236 | void *arg, int (*func)(unsigned long, unsigned long, void *)); |
Vivek Goyal | 8c86e70 | 2014-08-08 14:25:50 -0700 | [diff] [blame] | 237 | extern int |
| 238 | walk_system_ram_res(u64 start, u64 end, void *arg, |
| 239 | int (*func)(u64, u64, void *)); |
| 240 | extern int |
| 241 | walk_iomem_res(char *name, unsigned long flags, u64 start, u64 end, void *arg, |
| 242 | int (*func)(u64, u64, void *)); |
KAMEZAWA Hiroyuki | 908eedc | 2009-09-22 16:45:46 -0700 | [diff] [blame] | 243 | |
Wei Yang | 74d24b2 | 2012-04-26 15:32:55 +0800 | [diff] [blame] | 244 | /* True if any part of r1 overlaps r2 */ |
| 245 | static inline bool resource_overlaps(struct resource *r1, struct resource *r2) |
| 246 | { |
| 247 | return (r1->start <= r2->end && r1->end >= r2->start); |
| 248 | } |
| 249 | |
| 250 | |
Bernhard Walle | c9cce83 | 2008-01-30 13:30:32 +0100 | [diff] [blame] | 251 | #endif /* __ASSEMBLY__ */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | #endif /* _LINUX_IOPORT_H */ |