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Rev | Author | Line No. | Line |
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1631 | serge | 1 | /* |
2 | * ioport.h Definitions of routines for detecting, reserving and |
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3 | * allocating system resources. |
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4 | * |
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5 | * Authors: Linus Torvalds |
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6 | */ |
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7 | |||
8 | #ifndef _LINUX_IOPORT_H |
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9 | #define _LINUX_IOPORT_H |
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10 | |||
11 | #ifndef __ASSEMBLY__ |
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12 | #include |
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13 | #include |
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14 | /* |
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15 | * Resources are tree-like, allowing |
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16 | * nesting etc.. |
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17 | */ |
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18 | struct resource { |
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19 | resource_size_t start; |
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20 | resource_size_t end; |
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21 | const char *name; |
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22 | unsigned long flags; |
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7143 | serge | 23 | unsigned long desc; |
1631 | serge | 24 | struct resource *parent, *sibling, *child; |
25 | }; |
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26 | |||
27 | /* |
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28 | * IO resources have these defined flags. |
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29 | */ |
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30 | #define IORESOURCE_BITS 0x000000ff /* Bus-specific bits */ |
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31 | |||
32 | #define IORESOURCE_TYPE_BITS 0x00001f00 /* Resource type */ |
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3031 | serge | 33 | #define IORESOURCE_IO 0x00000100 /* PCI/ISA I/O ports */ |
1631 | serge | 34 | #define IORESOURCE_MEM 0x00000200 |
3031 | serge | 35 | #define IORESOURCE_REG 0x00000300 /* Register offsets */ |
1631 | serge | 36 | #define IORESOURCE_IRQ 0x00000400 |
37 | #define IORESOURCE_DMA 0x00000800 |
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38 | #define IORESOURCE_BUS 0x00001000 |
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39 | |||
40 | #define IORESOURCE_PREFETCH 0x00002000 /* No side effects */ |
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41 | #define IORESOURCE_READONLY 0x00004000 |
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42 | #define IORESOURCE_CACHEABLE 0x00008000 |
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43 | #define IORESOURCE_RANGELENGTH 0x00010000 |
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44 | #define IORESOURCE_SHADOWABLE 0x00020000 |
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45 | |||
46 | #define IORESOURCE_SIZEALIGN 0x00040000 /* size indicates alignment */ |
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47 | #define IORESOURCE_STARTALIGN 0x00080000 /* start field is alignment */ |
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48 | |||
49 | #define IORESOURCE_MEM_64 0x00100000 |
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50 | #define IORESOURCE_WINDOW 0x00200000 /* forwarded by bridge */ |
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51 | #define IORESOURCE_MUXED 0x00400000 /* Resource is software muxed */ |
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52 | |||
7143 | serge | 53 | #define IORESOURCE_EXT_TYPE_BITS 0x01000000 /* Resource extended types */ |
54 | #define IORESOURCE_SYSRAM 0x01000000 /* System RAM (modifier) */ |
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55 | |||
1631 | serge | 56 | #define IORESOURCE_EXCLUSIVE 0x08000000 /* Userland may not map this resource */ |
7143 | serge | 57 | |
1631 | serge | 58 | #define IORESOURCE_DISABLED 0x10000000 |
5056 | serge | 59 | #define IORESOURCE_UNSET 0x20000000 /* No address assigned yet */ |
1631 | serge | 60 | #define IORESOURCE_AUTO 0x40000000 |
61 | #define IORESOURCE_BUSY 0x80000000 /* Driver has marked this resource busy */ |
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62 | |||
7143 | serge | 63 | /* I/O resource extended types */ |
64 | #define IORESOURCE_SYSTEM_RAM (IORESOURCE_MEM|IORESOURCE_SYSRAM) |
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65 | |||
1631 | serge | 66 | /* PnP IRQ specific bits (IORESOURCE_BITS) */ |
67 | #define IORESOURCE_IRQ_HIGHEDGE (1<<0) |
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68 | #define IORESOURCE_IRQ_LOWEDGE (1<<1) |
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69 | #define IORESOURCE_IRQ_HIGHLEVEL (1<<2) |
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70 | #define IORESOURCE_IRQ_LOWLEVEL (1<<3) |
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71 | #define IORESOURCE_IRQ_SHAREABLE (1<<4) |
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72 | #define IORESOURCE_IRQ_OPTIONAL (1<<5) |
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73 | |||
74 | /* PnP DMA specific bits (IORESOURCE_BITS) */ |
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75 | #define IORESOURCE_DMA_TYPE_MASK (3<<0) |
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76 | #define IORESOURCE_DMA_8BIT (0<<0) |
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77 | #define IORESOURCE_DMA_8AND16BIT (1<<0) |
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78 | #define IORESOURCE_DMA_16BIT (2<<0) |
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79 | |||
80 | #define IORESOURCE_DMA_MASTER (1<<2) |
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81 | #define IORESOURCE_DMA_BYTE (1<<3) |
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82 | #define IORESOURCE_DMA_WORD (1<<4) |
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83 | |||
84 | #define IORESOURCE_DMA_SPEED_MASK (3<<6) |
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85 | #define IORESOURCE_DMA_COMPATIBLE (0<<6) |
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86 | #define IORESOURCE_DMA_TYPEA (1<<6) |
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87 | #define IORESOURCE_DMA_TYPEB (2<<6) |
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88 | #define IORESOURCE_DMA_TYPEF (3<<6) |
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89 | |||
90 | /* PnP memory I/O specific bits (IORESOURCE_BITS) */ |
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91 | #define IORESOURCE_MEM_WRITEABLE (1<<0) /* dup: IORESOURCE_READONLY */ |
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92 | #define IORESOURCE_MEM_CACHEABLE (1<<1) /* dup: IORESOURCE_CACHEABLE */ |
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93 | #define IORESOURCE_MEM_RANGELENGTH (1<<2) /* dup: IORESOURCE_RANGELENGTH */ |
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94 | #define IORESOURCE_MEM_TYPE_MASK (3<<3) |
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95 | #define IORESOURCE_MEM_8BIT (0<<3) |
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96 | #define IORESOURCE_MEM_16BIT (1<<3) |
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97 | #define IORESOURCE_MEM_8AND16BIT (2<<3) |
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98 | #define IORESOURCE_MEM_32BIT (3<<3) |
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99 | #define IORESOURCE_MEM_SHADOWABLE (1<<5) /* dup: IORESOURCE_SHADOWABLE */ |
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100 | #define IORESOURCE_MEM_EXPANSIONROM (1<<6) |
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101 | |||
102 | /* PnP I/O specific bits (IORESOURCE_BITS) */ |
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103 | #define IORESOURCE_IO_16BIT_ADDR (1<<0) |
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104 | #define IORESOURCE_IO_FIXED (1<<1) |
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6082 | serge | 105 | #define IORESOURCE_IO_SPARSE (1<<2) |
1631 | serge | 106 | |
107 | /* PCI ROM control bits (IORESOURCE_BITS) */ |
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108 | #define IORESOURCE_ROM_ENABLE (1<<0) /* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */ |
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7143 | serge | 109 | #define IORESOURCE_ROM_SHADOW (1<<1) /* Use RAM image, not ROM BAR */ |
1631 | serge | 110 | |
111 | /* PCI control bits. Shares IORESOURCE_BITS with above PCI ROM. */ |
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112 | #define IORESOURCE_PCI_FIXED (1<<4) /* Do not move resource */ |
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113 | |||
7143 | serge | 114 | /* |
115 | * I/O Resource Descriptors |
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116 | * |
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117 | * Descriptors are used by walk_iomem_res_desc() and region_intersects() |
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118 | * for searching a specific resource range in the iomem table. Assign |
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119 | * a new descriptor when a resource range supports the search interfaces. |
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120 | * Otherwise, resource.desc must be set to IORES_DESC_NONE (0). |
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121 | */ |
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122 | enum { |
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123 | IORES_DESC_NONE = 0, |
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124 | IORES_DESC_CRASH_KERNEL = 1, |
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125 | IORES_DESC_ACPI_TABLES = 2, |
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126 | IORES_DESC_ACPI_NV_STORAGE = 3, |
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127 | IORES_DESC_PERSISTENT_MEMORY = 4, |
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128 | IORES_DESC_PERSISTENT_MEMORY_LEGACY = 5, |
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129 | }; |
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6082 | serge | 130 | |
131 | /* helpers to define resources */ |
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132 | #define DEFINE_RES_NAMED(_start, _size, _name, _flags) \ |
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133 | { \ |
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134 | .start = (_start), \ |
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135 | .end = (_start) + (_size) - 1, \ |
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136 | .name = (_name), \ |
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137 | .flags = (_flags), \ |
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7143 | serge | 138 | .desc = IORES_DESC_NONE, \ |
6082 | serge | 139 | } |
140 | |||
141 | #define DEFINE_RES_IO_NAMED(_start, _size, _name) \ |
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142 | DEFINE_RES_NAMED((_start), (_size), (_name), IORESOURCE_IO) |
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143 | #define DEFINE_RES_IO(_start, _size) \ |
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144 | DEFINE_RES_IO_NAMED((_start), (_size), NULL) |
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145 | |||
146 | #define DEFINE_RES_MEM_NAMED(_start, _size, _name) \ |
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147 | DEFINE_RES_NAMED((_start), (_size), (_name), IORESOURCE_MEM) |
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148 | #define DEFINE_RES_MEM(_start, _size) \ |
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149 | DEFINE_RES_MEM_NAMED((_start), (_size), NULL) |
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150 | |||
151 | #define DEFINE_RES_IRQ_NAMED(_irq, _name) \ |
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152 | DEFINE_RES_NAMED((_irq), 1, (_name), IORESOURCE_IRQ) |
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153 | #define DEFINE_RES_IRQ(_irq) \ |
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154 | DEFINE_RES_IRQ_NAMED((_irq), NULL) |
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155 | |||
156 | #define DEFINE_RES_DMA_NAMED(_dma, _name) \ |
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157 | DEFINE_RES_NAMED((_dma), 1, (_name), IORESOURCE_DMA) |
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158 | #define DEFINE_RES_DMA(_dma) \ |
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159 | DEFINE_RES_DMA_NAMED((_dma), NULL) |
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160 | |||
1631 | serge | 161 | /* PC/ISA/whatever - the normal PC address spaces: IO and memory */ |
162 | extern struct resource ioport_resource; |
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163 | extern struct resource iomem_resource; |
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164 | |||
6082 | serge | 165 | extern struct resource *request_resource_conflict(struct resource *root, struct resource *new); |
166 | extern int request_resource(struct resource *root, struct resource *new); |
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167 | extern int release_resource(struct resource *new); |
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168 | void release_child_resources(struct resource *new); |
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169 | extern void reserve_region_with_split(struct resource *root, |
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170 | resource_size_t start, resource_size_t end, |
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171 | const char *name); |
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172 | extern struct resource *insert_resource_conflict(struct resource *parent, struct resource *new); |
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173 | extern int insert_resource(struct resource *parent, struct resource *new); |
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174 | extern void insert_resource_expand_to_fit(struct resource *root, struct resource *new); |
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7143 | serge | 175 | extern int remove_resource(struct resource *old); |
6082 | serge | 176 | extern void arch_remove_reservations(struct resource *avail); |
177 | extern int allocate_resource(struct resource *root, struct resource *new, |
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178 | resource_size_t size, resource_size_t min, |
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179 | resource_size_t max, resource_size_t align, |
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180 | resource_size_t (*alignf)(void *, |
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181 | const struct resource *, |
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182 | resource_size_t, |
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183 | resource_size_t), |
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184 | void *alignf_data); |
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185 | struct resource *lookup_resource(struct resource *root, resource_size_t start); |
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186 | int adjust_resource(struct resource *res, resource_size_t start, |
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187 | resource_size_t size); |
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188 | resource_size_t resource_alignment(struct resource *res); |
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1631 | serge | 189 | static inline resource_size_t resource_size(const struct resource *res) |
190 | { |
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191 | return res->end - res->start + 1; |
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192 | } |
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193 | static inline unsigned long resource_type(const struct resource *res) |
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194 | { |
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195 | return res->flags & IORESOURCE_TYPE_BITS; |
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196 | } |
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7143 | serge | 197 | static inline unsigned long resource_ext_type(const struct resource *res) |
198 | { |
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199 | return res->flags & IORESOURCE_EXT_TYPE_BITS; |
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200 | } |
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6102 | serge | 201 | /* True iff r1 completely contains r2 */ |
202 | static inline bool resource_contains(struct resource *r1, struct resource *r2) |
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203 | { |
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204 | if (resource_type(r1) != resource_type(r2)) |
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205 | return false; |
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206 | if (r1->flags & IORESOURCE_UNSET || r2->flags & IORESOURCE_UNSET) |
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207 | return false; |
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208 | return r1->start <= r2->start && r1->end >= r2->end; |
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209 | } |
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1631 | serge | 210 | |
211 | |||
6936 | serge | 212 | /* Convenience shorthand with allocation */ |
213 | #define request_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name), 0) |
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214 | #define request_muxed_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name), IORESOURCE_MUXED) |
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215 | #define __request_mem_region(start,n,name, excl) __request_region(&iomem_resource, (start), (n), (name), excl) |
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216 | #define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name), 0) |
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217 | #define request_mem_region_exclusive(start,n,name) \ |
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218 | __request_region(&iomem_resource, (start), (n), (name), IORESOURCE_EXCLUSIVE) |
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219 | #define rename_region(region, newname) do { (region)->name = (newname); } while (0) |
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1631 | serge | 220 | #endif /* __ASSEMBLY__ */ |
221 | #endif /* _LINUX_IOPORT_H */=>4)><4)>1)><1)>0)><0)>2) |