| 770bcbb6 |
1 | /*++\r |
| 2 | \r |
| 3 | Copyright (c) 2006, Intel Corporation \r |
| 4 | All rights reserved. This program and the accompanying materials \r |
| 5 | are licensed and made available under the terms and conditions of the BSD License \r |
| 6 | which accompanies this distribution. The full text of the license may be found at \r |
| 7 | http://opensource.org/licenses/bsd-license.php \r |
| 8 | \r |
| 9 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r |
| 10 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r |
| 11 | \r |
| 12 | Module Name:\r |
| 13 | \r |
| 14 | CpuIo.c\r |
| 15 | \r |
| 16 | Abstract:\r |
| 17 | \r |
| 18 | This is the code that publishes the CPU I/O Protocol.\r |
| 19 | The intent herein is to have a single I/O service that can load\r |
| 20 | as early as possible, extend into runtime, and be layered upon by \r |
| 21 | the implementations of architectural protocols and the PCI Root\r |
| 22 | Bridge I/O Protocol.\r |
| 23 | \r |
| 24 | --*/\r |
| 25 | \r |
| 26 | //\r |
| 27 | // Include common header file for this module.\r |
| 28 | //\r |
| 29 | #include "CommonHeader.h"\r |
| 30 | \r |
| 31 | #include <CpuDriver.h>\r |
| 32 | \r |
| 33 | #define IA32_MAX_IO_ADDRESS 0xFFFF\r |
| 34 | #define IA32_MAX_MEM_ADDRESS 0xFFFFFFFF\r |
| 35 | \r |
| 36 | EFI_CPU_IO_PROTOCOL mCpuIoProtocol;\r |
| 37 | \r |
| 38 | EFI_STATUS\r |
| 39 | CpuIoCheckAddressRange (\r |
| 40 | IN EFI_CPU_IO_PROTOCOL_WIDTH Width,\r |
| 41 | IN UINT64 Address,\r |
| 42 | IN UINTN Count,\r |
| 43 | IN VOID *Buffer,\r |
| 44 | IN UINT64 Limit\r |
| 45 | );\r |
| 46 | \r |
| 47 | EFI_STATUS\r |
| 48 | EFIAPI\r |
| 49 | CpuMemoryServiceRead (\r |
| 50 | IN EFI_CPU_IO_PROTOCOL *This,\r |
| 51 | IN EFI_CPU_IO_PROTOCOL_WIDTH Width,\r |
| 52 | IN UINT64 Address,\r |
| 53 | IN UINTN Count,\r |
| 54 | IN OUT VOID *Buffer\r |
| 55 | )\r |
| 56 | /*++\r |
| 57 | \r |
| 58 | Routine Description:\r |
| 59 | \r |
| 60 | Perform the Memory Access Read service for the CPU I/O Protocol\r |
| 61 | \r |
| 62 | Arguments:\r |
| 63 | \r |
| 64 | Pointer to an instance of the CPU I/O Protocol\r |
| 65 | Width of the Memory Access\r |
| 66 | Address of the Memory access\r |
| 67 | Count of the number of accesses to perform\r |
| 68 | Pointer to the buffer to read or write from memory\r |
| 69 | \r |
| 70 | Returns:\r |
| 71 | \r |
| 72 | Status\r |
| 73 | \r |
| 74 | EFI_SUCCESS - The data was read from or written to the EFI \r |
| 75 | System.\r |
| 76 | EFI_INVALID_PARAMETER - Width is invalid for this EFI System.\r |
| 77 | EFI_INVALID_PARAMETER - Buffer is NULL.\r |
| 78 | EFI_UNSUPPORTED - The Buffer is not aligned for the given Width.\r |
| 79 | EFI_UNSUPPORTED - The address range specified by Address, Width, \r |
| 80 | and Count is not valid for this EFI System.\r |
| 81 | \r |
| 82 | --*/\r |
| 83 | // TODO: This - add argument and description to function comment\r |
| 84 | {\r |
| 85 | EFI_STATUS Status;\r |
| 86 | \r |
| 87 | if (!Buffer) {\r |
| 88 | return EFI_INVALID_PARAMETER;\r |
| 89 | }\r |
| 90 | \r |
| 91 | Status = CpuIoCheckAddressRange (Width, Address, Count, Buffer, IA32_MAX_MEM_ADDRESS);\r |
| 92 | if (EFI_ERROR (Status)) {\r |
| 93 | return Status;\r |
| 94 | }\r |
| 95 | \r |
| 96 | //\r |
| 97 | // Do nothing for Nt32 version\r |
| 98 | //\r |
| 99 | return EFI_SUCCESS;\r |
| 100 | }\r |
| 101 | \r |
| 102 | EFI_STATUS\r |
| 103 | EFIAPI\r |
| 104 | CpuMemoryServiceWrite (\r |
| 105 | IN EFI_CPU_IO_PROTOCOL *This,\r |
| 106 | IN EFI_CPU_IO_PROTOCOL_WIDTH Width,\r |
| 107 | IN UINT64 Address,\r |
| 108 | IN UINTN Count,\r |
| 109 | IN OUT VOID *Buffer\r |
| 110 | )\r |
| 111 | /*++\r |
| 112 | \r |
| 113 | Routine Description:\r |
| 114 | \r |
| 115 | Perform the Memory Access Read service for the CPU I/O Protocol\r |
| 116 | \r |
| 117 | Arguments:\r |
| 118 | \r |
| 119 | Pointer to an instance of the CPU I/O Protocol\r |
| 120 | Width of the Memory Access\r |
| 121 | Address of the Memory access\r |
| 122 | Count of the number of accesses to perform\r |
| 123 | Pointer to the buffer to read or write from memory\r |
| 124 | \r |
| 125 | Returns:\r |
| 126 | \r |
| 127 | Status\r |
| 128 | \r |
| 129 | EFI_SUCCESS - The data was read from or written to the EFI System.\r |
| 130 | EFI_INVALID_PARAMETER - Width is invalid for this EFI System.\r |
| 131 | EFI_INVALID_PARAMETER - Buffer is NULL.\r |
| 132 | EFI_UNSUPPORTED - The Buffer is not aligned for the given Width.\r |
| 133 | EFI_UNSUPPORTED - The address range specified by Address, Width, and \r |
| 134 | Count is not valid for this EFI System.\r |
| 135 | \r |
| 136 | --*/\r |
| 137 | // TODO: This - add argument and description to function comment\r |
| 138 | {\r |
| 139 | EFI_STATUS Status;\r |
| 140 | \r |
| 141 | if (!Buffer) {\r |
| 142 | return EFI_INVALID_PARAMETER;\r |
| 143 | }\r |
| 144 | \r |
| 145 | Status = CpuIoCheckAddressRange (Width, Address, Count, Buffer, IA32_MAX_MEM_ADDRESS);\r |
| 146 | if (EFI_ERROR (Status)) {\r |
| 147 | return Status;\r |
| 148 | }\r |
| 149 | \r |
| 150 | //\r |
| 151 | // Do nothing for Nt32 version\r |
| 152 | //\r |
| 153 | return EFI_SUCCESS;\r |
| 154 | }\r |
| 155 | \r |
| 156 | EFI_STATUS\r |
| 157 | EFIAPI\r |
| 158 | CpuIoServiceRead (\r |
| 159 | IN EFI_CPU_IO_PROTOCOL *This,\r |
| 160 | IN EFI_CPU_IO_PROTOCOL_WIDTH Width,\r |
| 161 | IN UINT64 UserAddress,\r |
| 162 | IN UINTN Count,\r |
| 163 | IN OUT VOID *UserBuffer\r |
| 164 | )\r |
| 165 | /*++\r |
| 166 | \r |
| 167 | Routine Description:\r |
| 168 | \r |
| 169 | This is the service that implements the I/O read\r |
| 170 | \r |
| 171 | Arguments:\r |
| 172 | \r |
| 173 | Pointer to an instance of the CPU I/O Protocol\r |
| 174 | Width of the Memory Access\r |
| 175 | Address of the I/O access\r |
| 176 | Count of the number of accesses to perform\r |
| 177 | Pointer to the buffer to read or write from I/O space\r |
| 178 | \r |
| 179 | Returns:\r |
| 180 | \r |
| 181 | Status\r |
| 182 | EFI_SUCCESS - The data was read from or written to the EFI System.\r |
| 183 | EFI_INVALID_PARAMETER - Width is invalid for this EFI System.\r |
| 184 | EFI_INVALID_PARAMETER - Buffer is NULL.\r |
| 185 | EFI_UNSUPPORTED - The Buffer is not aligned for the given Width.\r |
| 186 | EFI_UNSUPPORTED - The address range specified by Address, Width, and \r |
| 187 | Count is not valid for this EFI System.\r |
| 188 | --*/\r |
| 189 | // TODO: This - add argument and description to function comment\r |
| 190 | // TODO: UserAddress - add argument and description to function comment\r |
| 191 | // TODO: UserBuffer - add argument and description to function comment\r |
| 192 | {\r |
| 193 | UINTN Address;\r |
| 194 | EFI_STATUS Status;\r |
| 195 | \r |
| 196 | if (!UserBuffer) {\r |
| 197 | return EFI_INVALID_PARAMETER;\r |
| 198 | }\r |
| 199 | \r |
| 200 | Address = (UINTN) UserAddress;\r |
| 201 | \r |
| 202 | if (Width >= EfiCpuIoWidthMaximum) {\r |
| 203 | return EFI_INVALID_PARAMETER;\r |
| 204 | }\r |
| 205 | \r |
| 206 | Status = CpuIoCheckAddressRange (Width, Address, Count, UserBuffer, IA32_MAX_IO_ADDRESS);\r |
| 207 | if (EFI_ERROR (Status)) {\r |
| 208 | return Status;\r |
| 209 | }\r |
| 210 | \r |
| 211 | //\r |
| 212 | // Do nothing for Nt32 version\r |
| 213 | //\r |
| 214 | return EFI_SUCCESS;\r |
| 215 | }\r |
| 216 | \r |
| 217 | EFI_STATUS\r |
| 218 | EFIAPI\r |
| 219 | CpuIoServiceWrite (\r |
| 220 | IN EFI_CPU_IO_PROTOCOL *This,\r |
| 221 | IN EFI_CPU_IO_PROTOCOL_WIDTH Width,\r |
| 222 | IN UINT64 UserAddress,\r |
| 223 | IN UINTN Count,\r |
| 224 | IN OUT VOID *UserBuffer\r |
| 225 | )\r |
| 226 | /*++\r |
| 227 | \r |
| 228 | Routine Description:\r |
| 229 | \r |
| 230 | \r |
| 231 | This is the service that implements the I/O Write\r |
| 232 | \r |
| 233 | Arguments:\r |
| 234 | \r |
| 235 | Pointer to an instance of the CPU I/O Protocol\r |
| 236 | Width of the Memory Access\r |
| 237 | Address of the I/O access\r |
| 238 | Count of the number of accesses to perform\r |
| 239 | Pointer to the buffer to read or write from I/O space\r |
| 240 | \r |
| 241 | Returns:\r |
| 242 | \r |
| 243 | Status\r |
| 244 | \r |
| 245 | Status\r |
| 246 | EFI_SUCCESS - The data was read from or written to the EFI System.\r |
| 247 | EFI_INVALID_PARAMETER - Width is invalid for this EFI System.\r |
| 248 | EFI_INVALID_PARAMETER - Buffer is NULL.\r |
| 249 | EFI_UNSUPPORTED - The Buffer is not aligned for the given Width.\r |
| 250 | EFI_UNSUPPORTED - The address range specified by Address, Width, and \r |
| 251 | Count is not valid for this EFI System.\r |
| 252 | \r |
| 253 | --*/\r |
| 254 | // TODO: This - add argument and description to function comment\r |
| 255 | // TODO: UserAddress - add argument and description to function comment\r |
| 256 | // TODO: UserBuffer - add argument and description to function comment\r |
| 257 | {\r |
| 258 | UINTN Address;\r |
| 259 | EFI_STATUS Status;\r |
| 260 | \r |
| 261 | if (!UserBuffer) {\r |
| 262 | return EFI_INVALID_PARAMETER;\r |
| 263 | }\r |
| 264 | \r |
| 265 | Address = (UINTN) UserAddress;\r |
| 266 | \r |
| 267 | if (Width >= EfiCpuIoWidthMaximum) {\r |
| 268 | return EFI_INVALID_PARAMETER;\r |
| 269 | }\r |
| 270 | \r |
| 271 | Status = CpuIoCheckAddressRange (Width, Address, Count, UserBuffer, IA32_MAX_IO_ADDRESS);\r |
| 272 | if (EFI_ERROR (Status)) {\r |
| 273 | return Status;\r |
| 274 | }\r |
| 275 | \r |
| 276 | //\r |
| 277 | // Do nothing for Nt32 version\r |
| 278 | //\r |
| 279 | return EFI_SUCCESS;\r |
| 280 | }\r |
| 281 | \r |
| 282 | \r |
| 283 | EFI_STATUS\r |
| 284 | CpuIoCheckAddressRange (\r |
| 285 | IN EFI_CPU_IO_PROTOCOL_WIDTH Width,\r |
| 286 | IN UINT64 Address,\r |
| 287 | IN UINTN Count,\r |
| 288 | IN VOID *Buffer,\r |
| 289 | IN UINT64 Limit\r |
| 290 | )\r |
| 291 | /*++\r |
| 292 | \r |
| 293 | Routine Description:\r |
| 294 | \r |
| 295 | TODO: Add function description\r |
| 296 | \r |
| 297 | Arguments:\r |
| 298 | \r |
| 299 | Width - TODO: add argument description\r |
| 300 | Address - TODO: add argument description\r |
| 301 | Count - TODO: add argument description\r |
| 302 | Buffer - TODO: add argument description\r |
| 303 | Limit - TODO: add argument description\r |
| 304 | \r |
| 305 | Returns:\r |
| 306 | \r |
| 307 | EFI_UNSUPPORTED - TODO: Add description for return value\r |
| 308 | EFI_UNSUPPORTED - TODO: Add description for return value\r |
| 309 | EFI_UNSUPPORTED - TODO: Add description for return value\r |
| 310 | EFI_SUCCESS - TODO: Add description for return value\r |
| 311 | \r |
| 312 | --*/\r |
| 313 | {\r |
| 314 | UINTN AlignMask;\r |
| 315 | \r |
| 316 | if (Address > Limit) {\r |
| 317 | return EFI_UNSUPPORTED;\r |
| 318 | }\r |
| 319 | \r |
| 320 | //\r |
| 321 | // For FiFo type, the target address won't increase during the access, so treat count as 1\r |
| 322 | //\r |
| 323 | if (Width >= EfiCpuIoWidthFifoUint8 && Width <= EfiCpuIoWidthFifoUint64) {\r |
| 324 | Count = 1;\r |
| 325 | }\r |
| 326 | \r |
| 327 | Width = Width & 0x03;\r |
| 328 | if (Address - 1 + (1 << Width) * Count > Limit) {\r |
| 329 | return EFI_UNSUPPORTED;\r |
| 330 | }\r |
| 331 | \r |
| 332 | AlignMask = (1 << Width) - 1;\r |
| 333 | if ((UINTN) Buffer & AlignMask) {\r |
| 334 | return EFI_UNSUPPORTED;\r |
| 335 | }\r |
| 336 | \r |
| 337 | return EFI_SUCCESS;\r |
| 338 | }\r |
| 339 | \r |
| 340 | \r |
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