函数源码 |
Source File:arch\x86\include\asm\io.h |
Create Date:2022-07-27 06:46:56 |
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271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 | #endif /* CONFIG_AMD_MEM_ENCRYPT */#define BUILDIO(bwl, bw, type) \static inline void out##bwl(unsigned type value, int port) \{ \ asm volatile("out" #bwl " %" #bw "0, %w1" \ : : "a"(value), "Nd"(port)); \} \ \static inline unsigned type in##bwl(int port) \{ \ unsigned type value; \ asm volatile("in" #bwl " %w1, %" #bw "0" \ : "=a"(value) : "Nd"(port)); \ return value; \} \ \static inline void out##bwl##_p(unsigned type value, int port) \{ \ out##bwl(value, port); \ slow_down_io(); \} \ \static inline unsigned type in##bwl##_p(int port) \{ \ unsigned type value = in##bwl(port); \ slow_down_io(); \ return value; \} \ \static inline void outs##bwl(int port, const void *addr, unsigned long count) \{ \ if (sev_key_active()) { \ unsigned type *value = (unsigned type *)addr; \ while (count) { \ out##bwl(*value, port); \ value++; \ count--; \ } \ } else { \ asm volatile("rep; outs" #bwl \ : "+S"(addr), "+c"(count) \ : "d"(port) : "memory"); \ } \} \ \static inline void ins##bwl(int port, void *addr, unsigned long count) \{ \ if (sev_key_active()) { \ unsigned type *value = (unsigned type *)addr; \ while (count) { \ *value = in##bwl(port); \ value++; \ count--; \ } \ } else { \ asm volatile("rep; ins" #bwl \ : "+D"(addr), "+c"(count) \ : "d"(port) : "memory"); \ } \}BUILDIO(b, b, char) |