cache-utils.h

   1 #ifndef QEMU_CACHE_UTILS_H
   2 #define QEMU_CACHE_UTILS_H
   3
   4 #if defined(_ARCH_PPC)
   5
   6 #include <stdint.h> /* uintptr_t */
   7
   8 struct qemu_cache_conf {
   9     unsigned long dcache_bsize;
  10     unsigned long icache_bsize;
  11 };
  12
  13 extern struct qemu_cache_conf qemu_cache_conf;
  14
  15 void qemu_cache_utils_init(char **envp);
  16
  17 /* mildly adjusted code from tcg-dyngen.c */
  18 static inline void flush_icache_range(uintptr_t start, uintptr_t stop)
  19 {
  20     unsigned long p, start1, stop1;
  21     unsigned long dsize = qemu_cache_conf.dcache_bsize;
  22     unsigned long isize = qemu_cache_conf.icache_bsize;
  23
  24     start1 = start & ~(dsize - 1);
  25     stop1 = (stop + dsize - 1) & ~(dsize - 1);
  26     for (p = start1; p < stop1; p += dsize) {
  27         asm volatile ("dcbst 0,%0" : : "r"(p) : "memory");
  28     }
  29     asm volatile ("sync" : : : "memory");
  30
  31     start &= start & ~(isize - 1);
  32     stop1 = (stop + isize - 1) & ~(isize - 1);
  33     for (p = start1; p < stop1; p += isize) {
  34         asm volatile ("icbi 0,%0" : : "r"(p) : "memory");
  35     }
  36     asm volatile ("sync" : : : "memory");
  37     asm volatile ("isync" : : : "memory");
  38 }
  39
  40 #else
  41 #define qemu_cache_utils_init(envp) do { (void) (envp); } while (0)
  42 #endif
  43
  44 #endif /* QEMU_CACHE_UTILS_H */